--- /dev/null
+Microsoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 1 - 1\r
+\r
+\r
+ ;========================================================\r
+ ; MODEX.ASM - A Complete Mode X Library\r
+ ;\r
+ ; Version 1.04 Release, 3 May 1993, By Matt Pritchard\r
+ ; With considerable input from Michael Abrash\r
+ ;\r
+ ; The following information is donated to the public domain in\r
+ ; the hopes that save other programmers much frustration.\r
+ ;\r
+ ; If you do use this code in a product, it would be nice if\r
+ ; you include a line like "Mode X routines by Matt Pritchard"\r
+ ; in the credits.\r
+ ;\r
+ ; =========================================================\r
+ ;\r
+ ; All of this code is designed to be assembled with MASM 5.10a\r
+ ; but TASM 3.0 could be used as well.\r
+ ;\r
+ ; The routines contained are designed for use in a MEDIUM model\r
+ ; program. All Routines are FAR, and is assumed that a DGROUP\r
+ ; data segment exists and that DS will point to it on entry.\r
+ ;\r
+ ; For all routines, the AX, BX, CX, DX, ES and FLAGS registers\r
+ ; will not be preserved, while the DS, BP, SI and DI registers\r
+ ; will be preserved.\r
+ ;\r
+ ; Unless specifically noted, All Parameters are assumed to be\r
+ ; "PASSED BY VALUE". That is, the actual value is placed on\r
+ ; the stack. When a reference is passed it is assumed to be\r
+ ; a near pointer to a variable in the DGROUP segment.\r
+ ;\r
+ ; Routines that return a single 16-Bit integer value will\r
+ ; return that value in the AX register.\r
+ ;\r
+ ; This code will *NOT* run on an 8086/8088 because 80286+\r
+ ; specific instructions are used. If you have an 8088/86\r
+ ; and VGA, you can buy an 80386-40 motherboard for about\r
+ ; $160 and move into the 90's.\r
+ ;\r
+ ; This code is reasonably optimized: Most drawing loops have\r
+ ; been unrolled once and memory references are minimized by\r
+ ; keeping stuff in registers when possible.\r
+ ;\r
+ ; Error Trapping varies by Routine. No Clipping is performed\r
+ ; so the caller should verify that all coordinates are valid.\r
+ ;\r
+ ; Several Macros are used to simplify common 2 or 3 instruction\r
+ ; sequences. Several Single letter Text Constants also\r
+ ; simplify common assembler expressions like "WORD PTR".\r
+ ;\r
+ ; ------------------ Mode X Variations ------------------\r
+ ;\r
+ ; Mode # Screen Size Max Pages Aspect Ratio (X:Y)\r
+ ;\r
+ ; 0 320 x 200 4 Pages 1.2:1\r
+ ; 1 320 x 400 2 Pages 2.4:1\r
+ ; 2 360 x 200 3 Pages 1.35:1\r
+ ; 3 360 x 400 1 Page 2.7:1\r
+ ; 4 320 x 240 3 Pages 1:1\r
+ ; 5 320 x 480 1 Page 2:1\r
+ ; 6 360 x 240 3 Pages 1.125:1\r
+ ; 7 360 x 480 1 Page 2.25:1\r
+ ;\r
+ ; -------------------- The Legal Stuff ------------------\r
+ ;\r
+ ; No warranty, either written or implied, is made as to\r
+ ; the accuracy and usability of this code product. Use\r
+ ; at your own risk. Batteries not included. Pepperoni\r
+ ; and extra cheese available for an additional charge.\r
+ ;\r
+ ; ----------------------- The Author --------------------\r
+ ;\r
+ ; Matt Pritchard is a paid programmer who'd rather be\r
+ ; writing games. He can be reached at: P.O. Box 140264,\r
+ ; Irving, TX 75014 USA. Michael Abrash is a living\r
+ ; god, who now works for Bill Gates (Microsoft).\r
+ ;\r
+ ; -------------------- Revision History -----------------\r
+ ; 4-12-93: v1.02 - SET_POINT & READ_POINT now saves DI\r
+ ; SET_MODEX now saves SI\r
+ ; 5-3-93: v1.04 - added LOAD_DAC_REGISTERS and\r
+ ; READ_DAC_REGISTERS. Expanded CLR Macro\r
+ ; to handle multiple registers\r
+ ;\r
+ \r
+ PAGE 255, 132\r
+ \r
+ .MODEL Medium\r
+ .286\r
+ \r
+ ; ===== MACROS =====\r
+ \r
+ ; Macro to OUT a 16 bit value to an I/O port\r
+ \r
+ OUT_16 MACRO Register, Value\r
+ IFDIFI <Register>, <DX> ; If DX not setup\r
+ MOV DX, Register ; then Select Register\r
+ ENDIF\r
+ IFDIFI <Value>, <AX> ; If AX not setup\r
+ MOV AX, Value ; then Get Data Value\r
+ ENDIF\r
+ OUT DX, AX ; Set I/O Register(s)\r
+ ENDM\r
+ \r
+ ; Macro to OUT a 8 bit value to an I/O Port\r
+ \r
+ OUT_8 MACRO Register, Value\r
+ IFDIFI <Register>, <DX> ; If DX not setup\r
+ MOV DX, Register ; then Select Register\r
+ ENDIF\r
+ IFDIFI <Value>, <AL> ; If AL not Setup\r
+ MOV AL, Value ; then Get Data Value\r
+ ENDIF\r
+ OUT DX, AL ; Set I/O Register\r
+ ENDM\r
+ \r
+ ; macros to PUSH and POP multiple registers\r
+ \r
+ PUSHx MACRO R1, R2, R3, R4, R5, R6, R7, R8\r
+ IFNB <R1>\r
+ PUSH R1 ; Save R1\r
+ PUSHx R2, R3, R4, R5, R6, R7, R8\r
+ ENDIF\r
+ ENDM\r
+ \r
+ POPx MACRO R1, R2, R3, R4, R5, R6, R7, R8\r
+ IFNB <R1>\r
+ POP R1 ; Restore R1\r
+ POPx R2, R3, R4, R5, R6, R7, R8\r
+ ENDIF\r
+ ENDM\r
+ \r
+ ; Macro to Clear Registers to 0\r
+ \r
+ CLR MACRO Register, R2, R3, R4, R5, R6\r
+ IFNB <Register>\r
+ XOR Register, Register ; Set Register = 0\r
+ CLR R2, R3, R4, R5, R6\r
+ ENDIF\r
+ ENDM\r
+ \r
+ ; Macros to Decrement Counter & Jump on Condition\r
+ \r
+ LOOPx MACRO Register, Destination\r
+ DEC Register ; Counter--\r
+ JNZ Destination ; Jump if not 0\r
+ ENDM\r
+ \r
+ LOOPjz MACRO Register, Destination\r
+ DEC Register ; Counter--\r
+ JZ Destination ; Jump if 0\r
+ ENDM\r
+ \r
+ \r
+ ; ===== General Constants =====\r
+ \r
+ = 0000 False EQU 0\r
+ =-0001 True EQU -1\r
+ = 0000 nil EQU 0\r
+ \r
+ = BYTE PTR b EQU BYTE PTR\r
+ = WORD PTR w EQU WORD PTR\r
+ = DWORD PTR d EQU DWORD PTR\r
+ = OFFSET o EQU OFFSET\r
+ = FAR PTR f EQU FAR PTR\r
+ = SHORT s EQU SHORT\r
+ = ?,?,?,? ?x4 EQU <?,?,?,?>\r
+ = ?,?,? ?x3 EQU <?,?,?>\r
+ \r
+ ; ===== VGA Register Values =====\r
+ \r
+ = A000 VGA_Segment EQU 0A000h ; Vga Memory Segment\r
+ \r
+ = 03C0 ATTRIB_Ctrl EQU 03C0h ; VGA Attribute Controller\r
+ = 03CE GC_Index EQU 03CEh ; VGA Graphics Controller\r
+ = 03C4 SC_Index EQU 03C4h ; VGA Sequencer Controller\r
+ = 03C5 SC_Data EQU 03C5h ; VGA Sequencer Data Port\r
+ = 03D4 CRTC_Index EQU 03D4h ; VGA CRT Controller\r
+ = 03D5 CRTC_Data EQU 03D5h ; VGA CRT Controller Data\r
+ = 03C2 MISC_OUTPUT EQU 03C2h ; VGA Misc Register\r
+ = 03DA INPUT_1 EQU 03DAh ; Input Status #1 Register\r
+ \r
+ = 03C8 DAC_WRITE_ADDR EQU 03C8h ; VGA DAC Write Addr Register\r
+ = 03C7 DAC_READ_ADDR EQU 03C7h ; VGA DAC Read Addr Register\r
+ = 03C9 PEL_DATA_REG EQU 03C9h ; VGA DAC/PEL data Register R/W\r
+ \r
+ = 0033 PIXEL_PAN_REG EQU 033h ; Attrib Index: Pixel Pan Reg\r
+ = 0002 MAP_MASK EQU 002h ; Sequ Index: Write Map Mask reg\r
+ = 0004 READ_MAP EQU 004h ; GC Index: Read Map Register\r
+ = 000C START_DISP_HI EQU 00Ch ; CRTC Index: Display Start Hi\r
+ = 000D START_DISP_LO EQU 00Dh ; CRTC Index: Display Start Lo\r
+ \r
+ = 0102 MAP_MASK_PLANE1 EQU 00102h ; Map Register + Plane 1\r
+ = 1102 MAP_MASK_PLANE2 EQU 01102h ; Map Register + Plane 1\r
+ = 0F02 ALL_PLANES_ON EQU 00F02h ; Map Register + All Bit Planes\r
+ \r
+ = 0604 CHAIN4_OFF EQU 00604h ; Chain 4 mode Off\r
+ = 0100 ASYNC_RESET EQU 00100h ; (A)synchronous Reset\r
+ = 0300 SEQU_RESTART EQU 00300h ; Sequencer Restart\r
+ \r
+ = 0008 LATCHES_ON EQU 00008h ; Bit Mask + Data from Latches\r
+ = FF08 LATCHES_OFF EQU 0FF08h ; Bit Mask + Data from CPU\r
+ \r
+ = 0008 VERT_RETRACE EQU 08h ; INPUT_1: Vertical Retrace Bit\r
+ = 0003 PLANE_BITS EQU 03h ; Bits 0-1 of Xpos = Plane #\r
+ = 000F ALL_PLANES EQU 0Fh ; All Bit Planes Selected\r
+ = 000F CHAR_BITS EQU 0Fh ; Bits 0-3 of Character Data\r
+ \r
+ = 1130 GET_CHAR_PTR EQU 01130h ; VGA BIOS Func: Get Char Set\r
+ = 0003 ROM_8x8_Lo EQU 03h ; ROM 8x8 Char Set Lo Pointer\r
+ = 0004 ROM_8x8_Hi EQU 04h ; ROM 8x8 Char Set Hi Pointer\r
+ \r
+ ; Constants Specific for these routines\r
+ \r
+ = 0008 NUM_MODES EQU 8 ; # of Mode X Variations\r
+ \r
+ ; Specific Mode Data Table format...\r
+ \r
+ 000C Mode_Data_Table STRUC\r
+ 0000 00 M_MiscR DB ? ; Value of MISC_OUTPUT register\r
+ 0001 00 M_Pages DB ? ; Maximum Possible # of pages\r
+ 0002 0000 M_XSize DW ? ; X Size Displayed on screen\r
+ 0004 0000 M_YSize DW ? ; Y Size Displayed on screen\r
+ 0006 0000 M_XMax DW ? ; Maximum Possible X Size\r
+ 0008 0000 M_YMax DW ? ; Maximum Possible Y Size\r
+ 000A 0000 M_CRTC DW ? ; Table of CRTC register values\r
+ Mode_Data_Table ENDS\r
+ \r
+ ; ===== DGROUP STORAGE NEEDED (42 BYTES) =====\r
+ \r
+ 0000 .DATA?\r
+ \r
+ 0000 0000 SCREEN_WIDTH DW 0 ; Width of a line in Bytes\r
+ 0002 0000 SCREEN_HEIGHT DW 0 ; Vertical Height in Pixels\r
+ \r
+ 0004 0000 LAST_PAGE DW 0 ; # of Display Pages\r
+ 0006 0004 [ PAGE_ADDR DW 4 DUP (0) ; Offsets to start of each page\r
+ 0000\r
+ ]\r
+ \r
+ 000E 0000 PAGE_SIZE DW 0 ; Size of Page in Addr Bytes\r
+ \r
+ 0010 0000 DISPLAY_PAGE DW 0 ; Page # currently displayed\r
+ 0012 0000 ACTIVE_PAGE DW 0 ; Page # currently active\r
+ \r
+ 0014 0000 CURRENT_PAGE DW 0 ; Offset of current Page\r
+ 0016 0000 CURRENT_SEGMENT DW 0 ; Segment of VGA memory\r
+ \r
+ 0018 0000 CURRENT_XOFFSET DW 0 ; Current Display X Offset\r
+ 001A 0000 CURRENT_YOFFSET DW 0 ; Current Display Y Offset\r
+ \r
+ 001C 0000 CURRENT_MOFFSET DW 0 ; Current Start Offset\r
+ \r
+ 001E 0000 MAX_XOFFSET DW 0 ; Current Display X Offset\r
+ 0020 0000 MAX_YOFFSET DW 0 ; Current Display Y Offset\r
+ \r
+ 0022 0000 0000 CHARSET_LOW DW 0, 0 ; Far Ptr to Char Set: 0-127\r
+ 0026 0000 0000 CHARSET_HI DW 0, 0 ; Far Ptr to Char Set: 128-255\r
+ \r
+ 0000 .CODE\r
+ \r
+ ; ===== DATA TABLES =====\r
+ \r
+ ; Data Tables, Put in Code Segment for Easy Access\r
+ ; (Like when all the other Segment Registers are in\r
+ ; use!!) and reduced DGROUP requirements...\r
+ \r
+ ; Bit Mask Tables for Left/Right/Character Masks\r
+ \r
+ 0000 0F 0E 0C 08 Left_Clip_Mask DB 0FH, 0EH, 0CH, 08H\r
+ \r
+ 0004 01 03 07 0F Right_Clip_Mask DB 01H, 03H, 07H, 0FH\r
+ \r
+ ; Bit Patterns for converting character fonts\r
+ \r
+ 0008 00 08 04 0C 02 0A Char_Plane_Data DB 00H,08H,04H,0CH,02H,0AH,06H,0EH\r
+ 06 0E\r
+ 0010 01 09 05 0D 03 0B DB 01H,09H,05H,0DH,03H,0BH,07H,0FH\r
+ 07 0F\r
+ \r
+ ; CRTC Register Values for Various Configurations\r
+ \r
+ 0018 MODE_Single_Line: ; CRTC Setup Data for 400/480 Line modes\r
+ 0018 4009 DW 04009H ; Cell Height (1 Scan Line)\r
+ 001A 0014 DW 00014H ; Dword Mode off\r
+ 001C E317 DW 0E317H ; turn on Byte Mode\r
+ 001E 0000 DW nil ; End of CRTC Data for 400/480 Line Mode\r
+ \r
+ 0020 MODE_Double_Line: ; CRTC Setup Data for 200/240 Line modes\r
+ 0020 4109 DW 04109H ; Cell Height (2 Scan Lines)\r
+ 0022 0014 DW 00014H ; Dword Mode off\r
+ 0024 E317 DW 0E317H ; turn on Byte Mode\r
+ 0026 0000 DW nil ; End of CRTC Data for 200/240 Line Mode\r
+ \r
+ 0028 MODE_320_Wide: ; CRTC Setup Data for 320 Horz Pixels\r
+ 0028 5F00 DW 05F00H ; Horz total\r
+ 002A 4F01 DW 04F01H ; Horz Displayed\r
+ 002C 5002 DW 05002H ; Start Horz Blanking\r
+ 002E 8203 DW 08203H ; End Horz Blanking\r
+ 0030 5404 DW 05404H ; Start H Sync\r
+ 0032 8005 DW 08005H ; End H Sync\r
+ 0034 0000 DW nil ; End of CRTC Data for 320 Horz pixels\r
+ \r
+ 0036 MODE_360_Wide: ; CRTC Setup Data for 360 Horz Pixels\r
+ 0036 6B00 DW 06B00H ; Horz total\r
+ 0038 5901 DW 05901H ; Horz Displayed\r
+ 003A 5A02 DW 05A02H ; Start Horz Blanking\r
+ 003C 8E03 DW 08E03H ; End Horz Blanking\r
+ 003E 5E04 DW 05E04H ; Start H Sync\r
+ 0040 8A05 DW 08A05H ; End H Sync\r
+ 0042 0000 DW nil ; End of CRTC Data for 360 Horz pixels\r
+ \r
+ 0044 MODE_200_Tall:\r
+ 0044 MODE_400_Tall: ; CRTC Setup Data for 200/400 Line modes\r
+ 0044 BF06 DW 0BF06H ; Vertical Total\r
+ 0046 1F07 DW 01F07H ; Overflow\r
+ 0048 9C10 DW 09C10H ; V Sync Start\r
+ 004A 8E11 DW 08E11H ; V Sync End/Prot Cr0 Cr7\r
+ 004C 8F12 DW 08F12H ; Vertical Displayed\r
+ 004E 9615 DW 09615H ; V Blank Start\r
+ 0050 B916 DW 0B916H ; V Blank End\r
+ 0052 0000 DW nil ; End of CRTC Data for 200/400 Lines\r
+ \r
+ 0054 MODE_240_Tall:\r
+ 0054 MODE_480_Tall: ; CRTC Setup Data for 240/480 Line modes\r
+ 0054 0D06 DW 00D06H ; Vertical Total\r
+ 0056 3E07 DW 03E07H ; Overflow\r
+ 0058 EA10 DW 0EA10H ; V Sync Start\r
+ 005A 8C11 DW 08C11H ; V Sync End/Prot Cr0 Cr7\r
+ 005C DF12 DW 0DF12H ; Vertical Displayed\r
+ 005E E715 DW 0E715H ; V Blank Start\r
+ 0060 0616 DW 00616H ; V Blank End\r
+ 0062 0000 DW nil ; End of CRTC Data for 240/480 Lines\r
+ \r
+ ; Table of Display Mode Tables\r
+ \r
+ 0064 MODE_TABLE:\r
+ 0064 0074 R 0086 R DW o MODE_320x200, o MODE_320x400\r
+ 0068 00E0 R 00F2 R DW o MODE_360x200, o MODE_360x400\r
+ 006C 00BC R 00CE R DW o MODE_320x240, o MODE_320x480\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 2 - 1\r
+\r
+\r
+ 0070 0098 R 00AA R DW o MODE_360x240, o MODE_360x480\r
+ \r
+ ; Table of Display Mode Components\r
+ \r
+ 0074 MODE_320x200: ; Data for 320 by 200 Pixels\r
+ \r
+ 0074 63 DB 063h ; 400 scan Lines & 25 Mhz Clock\r
+ 0075 04 DB 4 ; Maximum of 4 Pages\r
+ 0076 0140 00C8 DW 320, 200 ; Displayed Pixels (X,Y)\r
+ 007A 0516 0330 DW 1302, 816 ; Max Possible X and Y Sizes\r
+ \r
+ 007E 0028 R 0044 R DW o MODE_320_Wide, o MODE_200_Tall\r
+ 0082 0020 R 0000 DW o MODE_Double_Line, nil\r
+ \r
+ 0086 MODE_320x400: ; Data for 320 by 400 Pixels\r
+ \r
+ 0086 63 DB 063h ; 400 scan Lines & 25 Mhz Clock\r
+ 0087 02 DB 2 ; Maximum of 2 Pages\r
+ 0088 0140 0190 DW 320, 400 ; Displayed Pixels X,Y\r
+ 008C 0288 0330 DW 648, 816 ; Max Possible X and Y Sizes\r
+ \r
+ 0090 0028 R 0044 R DW o MODE_320_Wide, o MODE_400_Tall\r
+ 0094 0018 R 0000 DW o MODE_Single_Line, nil\r
+ \r
+ 0098 MODE_360x240: ; Data for 360 by 240 Pixels\r
+ \r
+ 0098 E7 DB 0E7h ; 480 scan Lines & 28 Mhz Clock\r
+ 0099 03 DB 3 ; Maximum of 3 Pages\r
+ 009A 0168 00F0 DW 360, 240 ; Displayed Pixels X,Y\r
+ 009E 0444 02D8 DW 1092, 728 ; Max Possible X and Y Sizes\r
+ \r
+ 00A2 0036 R 0054 R DW o MODE_360_Wide, o MODE_240_Tall\r
+ 00A6 0020 R 0000 DW o MODE_Double_Line , nil\r
+ \r
+ 00AA MODE_360x480: ; Data for 360 by 480 Pixels\r
+ \r
+ 00AA E7 DB 0E7h ; 480 scan Lines & 28 Mhz Clock\r
+ 00AB 01 DB 1 ; Only 1 Page Possible\r
+ 00AC 0168 01E0 DW 360, 480 ; Displayed Pixels X,Y\r
+ 00B0 0220 02D8 DW 544, 728 ; Max Possible X and Y Sizes\r
+ \r
+ 00B4 0036 R 0054 R DW o MODE_360_Wide, o MODE_480_Tall\r
+ 00B8 0018 R 0000 DW o MODE_Single_Line , nil\r
+ \r
+ 00BC MODE_320x240: ; Data for 320 by 240 Pixels\r
+ \r
+ 00BC E3 DB 0E3h ; 480 scan Lines & 25 Mhz Clock\r
+ 00BD 03 DB 3 ; Maximum of 3 Pages\r
+ 00BE 0140 00F0 DW 320, 240 ; Displayed Pixels X,Y\r
+ 00C2 0440 0332 DW 1088, 818 ; Max Possible X and Y Sizes\r
+ \r
+ 00C6 0028 R 0054 R DW o MODE_320_Wide, o MODE_240_Tall\r
+ 00CA 0020 R 0000 DW o MODE_Double_Line, nil\r
+ \r
+ 00CE MODE_320x480: ; Data for 320 by 480 Pixels\r
+ \r
+ 00CE E3 DB 0E3h ; 480 scan Lines & 25 Mhz Clock\r
+ 00CF 01 DB 1 ; Only 1 Page Possible\r
+ 00D0 0140 01E0 DW 320, 480 ; Displayed Pixels X,Y\r
+ 00D4 021C 0332 DW 540, 818 ; Max Possible X and Y Sizes\r
+ \r
+ 00D8 0028 R 0054 R DW o MODE_320_WIDE, o MODE_480_Tall\r
+ 00DC 0018 R 0000 DW o MODE_Single_Line, nil\r
+ \r
+ 00E0 MODE_360x200: ; Data for 360 by 200 Pixels\r
+ \r
+ 00E0 67 DB 067h ; 400 scan Lines & 28 Mhz Clock\r
+ 00E1 03 DB 3 ; Maximum of 3 Pages\r
+ 00E2 0168 00C8 DW 360, 200 ; Displayed Pixels (X,Y)\r
+ 00E6 0516 02D8 DW 1302, 728 ; Max Possible X and Y Sizes\r
+ \r
+ 00EA 0036 R 0044 R DW o MODE_360_Wide, MODE_200_Tall\r
+ 00EE 0020 R 0000 DW o MODE_Double_Line, nil\r
+ \r
+ 00F2 MODE_360x400: ; Data for 360 by 400 Pixels\r
+ \r
+ 00F2 67 DB 067h ; 400 scan Lines & 28 Mhz Clock\r
+ 00F3 01 DB 1 ; Maximum of 1 Pages\r
+ 00F4 0168 0190 DW 360, 400 ; Displayed Pixels X,Y\r
+ 00F8 0288 0330 DW 648, 816 ; Max Possible X and Y Sizes\r
+ \r
+ 00FC 0036 R 0044 R DW o MODE_360_Wide, MODE_400_Tall\r
+ 0100 0018 R 0000 DW o MODE_Single_Line, nil\r
+ \r
+ \r
+ ; ===== MODE X SETUP ROUTINES =====\r
+ \r
+ ;======================================================\r
+ ;SET_VGA_MODEX% (ModeType%, MaxXPos%, MaxYpos%, Pages%)\r
+ ;======================================================\r
+ ;\r
+ ; Sets Up the specified version of Mode X. Allows for\r
+ ; the setup of multiple video pages, and a virtual\r
+ ; screen which can be larger than the displayed screen\r
+ ; (which can then be scrolled a pixel at a time)\r
+ ;\r
+ ; ENTRY: ModeType = Desired Screen Resolution (0-7)\r
+ ;\r
+ ; 0 = 320 x 200, 4 Pages max, 1.2:1 Aspect Ratio\r
+ ; 1 = 320 x 400, 2 Pages max, 2.4:1 Aspect Ratio\r
+ ; 2 = 360 x 200, 3 Pages max, 1.35:1 Aspect Ratio\r
+ ; 3 = 360 x 400, 1 Page max, 2.7:1 Aspect Ratio\r
+ ; 4 = 320 x 240, 3 Pages max, 1:1 Aspect Ratio\r
+ ; 5 = 320 x 480, 1 Page max, 2:1 Aspect Ratio\r
+ ; 6 = 360 x 240, 3 Pages max, 1.125:1 Aspect Ratio\r
+ ; 7 = 360 x 480, 1 Page max, 2.25:1 Aspect Ratio\r
+ ;\r
+ ; MaxXpos = The Desired Virtual Screen Width\r
+ ; MaxYpos = The Desired Virtual Screen Height\r
+ ; Pages = The Desired # of Video Pages\r
+ ;\r
+ ; EXIT: AX = Success Flag: 0 = Failure / -1= Success\r
+ ;\r
+ \r
+ 0016 SVM_STACK STRUC\r
+ 0000 0000 SVM_Table DW ? ; Offset of Mode Info Table\r
+ 0002 0000 0000 0000 DW ?x4 ; DI, SI, DS, BP\r
+ 0000\r
+ 000A 00000000 DD ? ; Caller\r
+ 000E 0000 SVM_Pages DW ? ; # of Screen Pages desired\r
+ 0010 0000 SVM_Ysize DW ? ; Vertical Screen Size Desired\r
+ 0012 0000 SVM_Xsize DW ? ; Horizontal Screen Size Desired\r
+ 0014 0000 SVM_Mode DW ? ; Display Resolution Desired\r
+ SVM_STACK ENDS\r
+ \r
+ PUBLIC SET_VGA_MODEX\r
+ \r
+ 0104 SET_VGA_MODEX PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 0104 55 1 PUSH BP ; Save R1\r
+ 0105 1E 2 PUSH DS ; Save R1\r
+ 0106 56 3 PUSH SI ; Save R1\r
+ 0107 57 4 PUSH DI ; Save R1\r
+ 0108 83 EC 02 SUB SP, 2 ; Allocate workspace\r
+ 010B 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ ; Check Legality of Mode Request....\r
+ \r
+ 010D 8B 5E 14 MOV BX, [BP].SVM_Mode ; Get Requested Mode #\r
+ 0110 83 FB 08 CMP BX, NUM_MODES ; Is it 0..7?\r
+ 0113 73 47 JAE @SVM_BadModeSetup ; If Not, Error out\r
+ \r
+ 0115 D1 E3 SHL BX, 1 ; Scale BX\r
+ 0117 2E: 8B B7 0064 R MOV SI, w MODE_TABLE[BX] ; CS:SI -> Mode Info\r
+ 011C 89 76 00 MOV [BP].SVM_Table, SI ; Save ptr for later use\r
+ \r
+ ; Check # of Requested Display Pages\r
+ \r
+ 011F 8B 4E 0E MOV CX, [BP].SVM_Pages ; Get # of Requested Pages\r
+ CLR CH ; Set Hi Word = 0!\r
+ 0122 32 ED 1 XOR CH, CH ; Set Register = 0\r
+ 0124 2E: 3A 4C 01 CMP CL, CS:[SI].M_Pages ; Check # Pages for mode\r
+ 0128 77 32 JA @SVM_BadModeSetup ; Report Error if too Many Pages\r
+ 012A E3 30 JCXZ @SVM_BadModeSetup ; Report Error if 0 Pages\r
+ \r
+ ; Check Validity of X Size\r
+ \r
+ 012C 83 66 12 F8 AND [BP].SVM_XSize, 0FFF8h ; X size Mod 8 Must = 0\r
+ \r
+ 0130 8B 46 12 MOV AX, [BP].SVM_XSize ; Get Logical Screen Width\r
+ 0133 2E: 3B 44 02 CMP AX, CS:[SI].M_XSize ; Check against Displayed X\r
+ 0137 72 23 JB @SVM_BadModeSetup ; Report Error if too small\r
+ 0139 2E: 3B 44 06 CMP AX, CS:[SI].M_XMax ; Check against Max X\r
+ 013D 77 1D JA @SVM_BadModeSetup ; Report Error if too big\r
+ \r
+ ; Check Validity of Y Size\r
+ \r
+ 013F 8B 5E 10 MOV BX, [BP].SVM_YSize ; Get Logical Screen Height\r
+ 0142 2E: 3B 5C 04 CMP BX, CS:[SI].M_YSize ; Check against Displayed Y\r
+ 0146 72 14 JB @SVM_BadModeSetup ; Report Error if too small\r
+ 0148 2E: 3B 5C 08 CMP BX, CS:[SI].M_YMax ; Check against Max Y\r
+ 014C 77 0E JA @SVM_BadModeSetup ; Report Error if too big\r
+ \r
+ ; Enough memory to Fit it all?\r
+ \r
+ 014E C1 E8 02 SHR AX, 2 ; # of Bytes:Line = XSize/4\r
+ 0151 F7 E1 MUL CX ; AX = Bytes/Line * Pages\r
+ 0153 F7 E3 MUL BX ; DX:AX = Total VGA mem needed\r
+ 0155 71 0A JNO @SVM_Continue ; Exit if Total Size > 256K\r
+ \r
+ 0157 4A DEC DX ; Was it Exactly 256K???\r
+ 0158 0B D0 OR DX, AX ; (DX = 1, AX = 0000)\r
+ 015A 74 05 JZ @SVM_Continue ; if so, it's valid...\r
+ \r
+ 015C @SVM_BadModeSetup:\r
+ \r
+ CLR AX ; Return Value = False\r
+ 015C 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 015E E9 00E6 JMP @SVM_Exit ; Normal Exit\r
+ \r
+ 0161 @SVM_Continue:\r
+ \r
+ 0161 B8 0013 MOV AX, 13H ; Start with Mode 13H\r
+ 0164 CD 10 INT 10H ; Let BIOS Set Mode\r
+ \r
+ OUT_16 SC_INDEX, CHAIN4_OFF ; Disable Chain 4 Mode\r
+ 0166 BA 03C4 1 MOV DX, SC_INDEX ; then Select Register\r
+ 0169 B8 0604 1 MOV AX, CHAIN4_OFF ; then Get Data Value\r
+ 016C EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ OUT_16 SC_INDEX, ASYNC_RESET ; (A)synchronous Reset\r
+ 016D BA 03C4 1 MOV DX, SC_INDEX ; then Select Register\r
+ 0170 B8 0100 1 MOV AX, ASYNC_RESET ; then Get Data Value\r
+ 0173 EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ OUT_8 MISC_OUTPUT, CS:[SI].M_MiscR ; Set New Timing/Size\r
+ 0174 BA 03C2 1 MOV DX, MISC_OUTPUT ; then Select Register\r
+ 0177 2E: 8A 04 1 MOV AL, CS:[SI].M_MiscR ; then Get Data Value\r
+ 017A EE 1 OUT DX, AL ; Set I/O Register\r
+ OUT_16 SC_INDEX, SEQU_RESTART ; Restart Sequencer ...\r
+ 017B BA 03C4 1 MOV DX, SC_INDEX ; then Select Register\r
+ 017E B8 0300 1 MOV AX, SEQU_RESTART ; then Get Data Value\r
+ 0181 EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ \r
+ OUT_8 CRTC_INDEX, 11H ; Select Vert Retrace End Register\r
+ 0182 BA 03D4 1 MOV DX, CRTC_INDEX ; then Select Register\r
+ 0185 B0 11 1 MOV AL, 11H ; then Get Data Value\r
+ 0187 EE 1 OUT DX, AL ; Set I/O Register\r
+ 0188 42 INC DX ; Point to Data\r
+ 0189 EC IN AL, DX ; Get Value, Bit 7 = Protect\r
+ 018A 24 7F AND AL, 7FH ; Mask out Write Protect\r
+ 018C EE OUT DX, AL ; And send it back\r
+ \r
+ 018D BA 03D4 MOV DX, CRTC_INDEX ; Vga Crtc Registers\r
+ 0190 83 C6 0A ADD SI, M_CRTC ; SI -> CRTC Parameter Data\r
+ \r
+ ; Load Tables of CRTC Parameters from List of Tables\r
+ \r
+ 0193 @SVM_Setup_Table:\r
+ \r
+ 0193 2E: 8B 3C MOV DI, CS:[SI] ; Get Pointer to CRTC Data Tbl\r
+ 0196 83 C6 02 ADD SI, 2 ; Point to next Ptr Entry\r
+ 0199 0B FF OR DI, DI ; A nil Ptr means that we have\r
+ 019B 74 0D JZ @SVM_Set_Data ; finished CRTC programming\r
+ \r
+ 019D @SVM_Setup_CRTC:\r
+ 019D 2E: 8B 05 MOV AX, CS:[DI] ; Get CRTC Data from Table\r
+ 01A0 83 C7 02 ADD DI, 2 ; Advance Pointer\r
+ 01A3 0B C0 OR AX, AX ; At End of Data Table?\r
+ 01A5 74 EC JZ @SVM_Setup_Table ; If so, Exit & get next Table\r
+ \r
+ 01A7 EF OUT DX, AX ; Reprogram VGA CRTC reg\r
+ 01A8 EB F3 JMP s @SVM_Setup_CRTC ; Process Next Table Entry\r
+ \r
+ ; Initialize Page & Scroll info, DI = 0\r
+ \r
+ 01AA @SVM_Set_Data:\r
+ 01AA 89 3E 0010 R MOV DISPLAY_PAGE, DI ; Display Page = 0\r
+ 01AE 89 3E 0012 R MOV ACTIVE_PAGE, DI ; Active Page = 0\r
+ 01B2 89 3E 0014 R MOV CURRENT_PAGE, DI ; Current Page (Offset) = 0\r
+ 01B6 89 3E 0018 R MOV CURRENT_XOFFSET, DI ; Horz Scroll Index = 0\r
+ 01BA 89 3E 001A R MOV CURRENT_YOFFSET, DI ; Vert Scroll Index = 0\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 3 - 1\r
+\r
+\r
+ 01BE 89 3E 001C R MOV CURRENT_MOFFSET, DI ; Memory Scroll Index = 0\r
+ \r
+ 01C2 B8 A000 MOV AX, VGA_SEGMENT ; Segment for VGA memory\r
+ 01C5 A3 0016 R MOV CURRENT_SEGMENT, AX ; Save for Future LES's\r
+ \r
+ ; Set Logical Screen Width, X Scroll and Our Data\r
+ \r
+ 01C8 8B 76 00 MOV SI, [BP].SVM_Table ; Get Saved Ptr to Mode Info\r
+ 01CB 8B 46 12 MOV AX, [BP].SVM_Xsize ; Get Display Width\r
+ \r
+ 01CE 8B C8 MOV CX, AX ; CX = Logical Width\r
+ 01D0 2E: 2B 4C 02 SUB CX, CS:[SI].M_XSize ; CX = Max X Scroll Value\r
+ 01D4 89 0E 001E R MOV MAX_XOFFSET, CX ; Set Maximum X Scroll\r
+ \r
+ 01D8 C1 E8 02 SHR AX, 2 ; Bytes = Pixels / 4\r
+ 01DB A3 0000 R MOV SCREEN_WIDTH, AX ; Save Width in Pixels\r
+ \r
+ 01DE D1 E8 SHR AX, 1 ; Offset Value = Bytes / 2\r
+ 01E0 B4 13 MOV AH, 13h ; CRTC Offset Register Index\r
+ 01E2 86 C4 XCHG AL, AH ; Switch format for OUT\r
+ 01E4 EF OUT DX, AX ; Set VGA CRTC Offset Reg\r
+ \r
+ ; Setup Data table, Y Scroll, Misc for Other Routines\r
+ \r
+ 01E5 8B 46 10 MOV AX, [BP].SVM_Ysize ; Get Logical Screen Height\r
+ \r
+ 01E8 8B C8 MOV CX, AX ; CX = Logical Height\r
+ 01EA 2E: 2B 5C 04 SUB BX, CS:[SI].M_YSize ; CX = Max Y Scroll Value\r
+ 01EE 89 0E 0020 R MOV MAX_YOFFSET, CX ; Set Maximum Y Scroll\r
+ \r
+ 01F2 A3 0002 R MOV SCREEN_HEIGHT, AX ; Save Height in Pixels\r
+ 01F5 F7 26 0000 R MUL SCREEN_WIDTH ; AX = Page Size in Bytes,\r
+ 01F9 A3 000E R MOV PAGE_SIZE, AX ; Save Page Size\r
+ \r
+ 01FC 8B 4E 0E MOV CX, [BP].SVM_Pages ; Get # of Pages\r
+ 01FF 89 0E 0004 R MOV LAST_PAGE, CX ; Save # of Pages\r
+ \r
+ CLR BX ; Page # = 0\r
+ 0203 33 DB 1 XOR BX, BX ; Set Register = 0\r
+ 0205 8B D3 MOV DX, BX ; Page 0 Offset = 0\r
+ \r
+ 0207 @SVM_Set_Pages:\r
+ \r
+ 0207 89 97 0006 R MOV PAGE_ADDR[BX], DX ; Set Page #(BX) Offset\r
+ 020B 83 C3 02 ADD BX, 2 ; Page#++\r
+ 020E 03 D0 ADD DX, AX ; Compute Addr of Next Page\r
+ LOOPx CX, @SVM_Set_Pages ; Loop until all Pages Set\r
+ 0210 49 1 DEC CX ; Counter--\r
+ 0211 75 F4 1 JNZ @SVM_Set_Pages ; Jump if not 0\r
+ \r
+ ; Clear VGA Memory\r
+ \r
+ OUT_16 SC_INDEX, ALL_PLANES_ON ; Select All Planes\r
+ 0213 BA 03C4 1 MOV DX, SC_INDEX ; then Select Register\r
+ 0216 B8 0F02 1 MOV AX, ALL_PLANES_ON ; then Get Data Value\r
+ 0219 EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ 021A C4 3E 0014 R LES DI, d CURRENT_PAGE ; -> Start of VGA memory\r
+ \r
+ CLR AX ; AX = 0\r
+ 021E 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 0220 FC CLD ; Block Xfer Forwards\r
+ 0221 B9 8000 MOV CX, 8000H ; 32K * 4 * 2 = 256K\r
+ 0224 F3/ AB REP STOSW ; Clear dat memory!\r
+ \r
+ ; Setup Font Pointers\r
+ \r
+ 0226 B7 03 MOV BH, ROM_8x8_Lo ; Ask for 8x8 Font, 0-127\r
+ 0228 B8 1130 MOV AX, GET_CHAR_PTR ; Service to Get Pointer\r
+ 022B CD 10 INT 10h ; Call VGA BIOS\r
+ \r
+ 022D 89 2E 0022 R MOV CHARSET_LOW, BP ; Save Char Set Offset\r
+ 0231 8C 06 0024 R MOV CHARSET_LOW+2, ES ; Save Char Set Segment\r
+ \r
+ 0235 B7 04 MOV BH, ROM_8x8_Hi ; Ask for 8x8 Font, 128-255\r
+ 0237 B8 1130 MOV AX, GET_CHAR_PTR ; Service to Get Pointer\r
+ 023A CD 10 INT 10h ; Call VGA BIOS\r
+ \r
+ 023C 89 2E 0026 R MOV CHARSET_HI, BP ; Save Char Set Offset\r
+ 0240 8C 06 0028 R MOV CHARSET_HI+2, ES ; Save Char Set Segment\r
+ \r
+ 0244 B8 FFFF MOV AX, True ; Return Success Code\r
+ \r
+ 0247 @SVM_EXIT:\r
+ 0247 83 C4 02 ADD SP, 2 ; Deallocate workspace\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 024A 5F 1 POP DI ; Restore R1\r
+ 024B 5E 2 POP SI ; Restore R1\r
+ 024C 1F 3 POP DS ; Restore R1\r
+ 024D 5D 4 POP BP ; Restore R1\r
+ 024E CA 0008 RET 8 ; Exit & Clean Up Stack\r
+ \r
+ 0251 SET_VGA_MODEX ENDP\r
+ \r
+ \r
+ ;==================\r
+ ;SET_MODEX% (Mode%)\r
+ ;==================\r
+ ;\r
+ ; Quickie Mode Set - Sets Up Mode X to Default Configuration\r
+ ;\r
+ ; ENTRY: ModeType = Desired Screen Resolution (0-7)\r
+ ; (See SET_VGA_MODEX for list)\r
+ ;\r
+ ; EXIT: AX = Success Flag: 0 = Failure / -1= Success\r
+ ;\r
+ \r
+ 000A SM_STACK STRUC\r
+ 0000 0000 0000 DW ?,? ; BP, SI\r
+ 0004 00000000 DD ? ; Caller\r
+ 0008 0000 SM_Mode DW ? ; Desired Screen Resolution\r
+ SM_STACK ENDS\r
+ \r
+ PUBLIC SET_MODEX\r
+ \r
+ 0251 SET_MODEX PROC FAR\r
+ \r
+ PUSHx BP, SI ; Preserve Important registers\r
+ 0251 55 1 PUSH BP ; Save R1\r
+ 0252 56 2 PUSH SI ; Save R1\r
+ 0253 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ CLR AX ; Assume Failure\r
+ 0255 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 0257 8B 5E 08 MOV BX, [BP].SM_Mode ; Get Desired Mode #\r
+ 025A 83 FB 08 CMP BX, NUM_MODES ; Is it a Valid Mode #?\r
+ 025D 73 1C JAE @SMX_Exit ; If Not, don't Bother\r
+ \r
+ 025F 53 PUSH BX ; Push Mode Parameter\r
+ \r
+ 0260 D1 E3 SHL BX, 1 ; Scale BX to word Index\r
+ 0262 2E: 8B B7 0064 R MOV SI, w MODE_TABLE[BX] ; CS:SI -> Mode Info\r
+ \r
+ 0267 2E: FF 74 02 PUSH CS:[SI].M_XSize ; Push Default X Size\r
+ 026B 2E: FF 74 04 PUSH CS:[SI].M_Ysize ; Push Default Y size\r
+ 026F 2E: 8A 44 01 MOV AL, CS:[SI].M_Pages ; Get Default # of Pages\r
+ CLR AH ; Hi Byte = 0\r
+ 0273 32 E4 1 XOR AH, AH ; Set Register = 0\r
+ 0275 50 PUSH AX ; Push # Pages\r
+ \r
+ 0276 9A ---- 0104 R CALL f SET_VGA_MODEX ; Set up Mode X!\r
+ \r
+ 027B @SMX_Exit:\r
+ POPx SI, BP ; Restore Registers\r
+ 027B 5E 1 POP SI ; Restore R1\r
+ 027C 5D 2 POP BP ; Restore R1\r
+ 027D CA 0002 RET 2 ; Exit & Clean Up Stack\r
+ \r
+ 0280 SET_MODEX ENDP\r
+ \r
+ \r
+ ; ===== BASIC GRAPHICS PRIMITIVES =====\r
+ \r
+ ;============================\r
+ ;CLEAR_VGA_SCREEN (ColorNum%)\r
+ ;============================\r
+ ;\r
+ ; Clears the active display page\r
+ ;\r
+ ; ENTRY: ColorNum = Color Value to fill the page with\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 000A CVS_STACK STRUC\r
+ 0000 0000 0000 DW ?,? ; DI, BP\r
+ 0004 00000000 DD ? ; Caller\r
+ 0008 00 00 CVS_COLOR DB ?,? ; Color to Set Screen to\r
+ CVS_STACK ENDS\r
+ \r
+ PUBLIC CLEAR_VGA_SCREEN\r
+ \r
+ 0280 CLEAR_VGA_SCREEN PROC FAR\r
+ \r
+ PUSHx BP, DI ; Preserve Important Registers\r
+ 0280 55 1 PUSH BP ; Save R1\r
+ 0281 57 2 PUSH DI ; Save R1\r
+ 0282 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ OUT_16 SC_INDEX, ALL_PLANES_ON ; Select All Planes\r
+ 0284 BA 03C4 1 MOV DX, SC_INDEX ; then Select Register\r
+ 0287 B8 0F02 1 MOV AX, ALL_PLANES_ON ; then Get Data Value\r
+ 028A EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ 028B C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ \r
+ 028F 8A 46 08 MOV AL, [BP].CVS_COLOR ; Get Color\r
+ 0292 8A E0 MOV AH, AL ; Copy for Word Write\r
+ 0294 FC CLD ; Block fill Forwards\r
+ \r
+ 0295 8B 0E 000E R MOV CX, PAGE_SIZE ; Get Size of Page\r
+ 0299 D1 E9 SHR CX, 1 ; Divide by 2 for Words\r
+ 029B F3/ AB REP STOSW ; Block Fill VGA memory\r
+ \r
+ POPx DI, BP ; Restore Saved Registers\r
+ 029D 5F 1 POP DI ; Restore R1\r
+ 029E 5D 2 POP BP ; Restore R1\r
+ 029F CA 0002 RET 2 ; Exit & Clean Up Stack\r
+ \r
+ 02A2 CLEAR_VGA_SCREEN ENDP\r
+ \r
+ \r
+ ;===================================\r
+ ;SET_POINT (Xpos%, Ypos%, ColorNum%)\r
+ ;===================================\r
+ ;\r
+ ; Plots a single Pixel on the active display page\r
+ ;\r
+ ; ENTRY: Xpos = X position to plot pixel at\r
+ ; Ypos = Y position to plot pixel at\r
+ ; ColorNum = Color to plot pixel with\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 000E SP_STACK STRUC\r
+ 0000 0000 0000 DW ?,? ; BP, DI\r
+ 0004 00000000 DD ? ; Caller\r
+ 0008 00 00 SETP_Color DB ?,? ; Color of Point to Plot\r
+ 000A 0000 SETP_Ypos DW ? ; Y pos of Point to Plot\r
+ 000C 0000 SETP_Xpos DW ? ; X pos of Point to Plot\r
+ SP_STACK ENDS\r
+ \r
+ PUBLIC SET_POINT\r
+ \r
+ 02A2 SET_POINT PROC FAR\r
+ \r
+ PUSHx BP, DI ; Preserve Registers\r
+ 02A2 55 1 PUSH BP ; Save R1\r
+ 02A3 57 2 PUSH DI ; Save R1\r
+ 02A4 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 02A6 C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ \r
+ 02AA 8B 46 0A MOV AX, [BP].SETP_Ypos ; Get Line # of Pixel\r
+ 02AD F7 26 0000 R MUL SCREEN_WIDTH ; Get Offset to Start of Line\r
+ \r
+ 02B1 8B 5E 0C MOV BX, [BP].SETP_Xpos ; Get Xpos\r
+ 02B4 8B CB MOV CX, BX ; Copy to extract Plane # from\r
+ 02B6 C1 EB 02 SHR BX, 2 ; X offset (Bytes) = Xpos/4\r
+ 02B9 03 D8 ADD BX, AX ; Offset = Width*Ypos + Xpos/4\r
+ \r
+ 02BB B8 0102 MOV AX, MAP_MASK_PLANE1 ; Map Mask & Plane Select Register\r
+ 02BE 80 E1 03 AND CL, PLANE_BITS ; Get Plane Bits\r
+ 02C1 D2 E4 SHL AH, CL ; Get Plane Select Value\r
+ OUT_16 SC_Index, AX ; Select Plane\r
+ 02C3 BA 03C4 1 MOV DX, SC_Index ; then Select Register\r
+ 02C6 EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ \r
+ 02C7 8A 46 08 MOV AL,[BP].SETP_Color ; Get Pixel Color\r
+ 02CA 26: 88 01 MOV ES:[DI+BX], AL ; Draw Pixel\r
+ \r
+ POPx DI, BP ; Restore Saved Registers\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 4 - 1\r
+\r
+\r
+ 02CD 5F 1 POP DI ; Restore R1\r
+ 02CE 5D 2 POP BP ; Restore R1\r
+ 02CF CA 0006 RET 6 ; Exit and Clean up Stack\r
+ \r
+ 02D2 SET_POINT ENDP\r
+ \r
+ \r
+ ;==========================\r
+ ;READ_POINT% (Xpos%, Ypos%)\r
+ ;==========================\r
+ ;\r
+ ; Read the color of a pixel from the Active Display Page\r
+ ;\r
+ ; ENTRY: Xpos = X position of pixel to read\r
+ ; Ypos = Y position of pixel to read\r
+ ;\r
+ ; EXIT: AX = Color of Pixel at (Xpos, Ypos)\r
+ ;\r
+ \r
+ 000C RP_STACK STRUC\r
+ 0000 0000 0000 DW ?,? ; BP, DI\r
+ 0004 00000000 DD ? ; Caller\r
+ 0008 0000 RP_Ypos DW ? ; Y pos of Point to Read\r
+ 000A 0000 RP_Xpos DW ? ; X pos of Point to Read\r
+ RP_STACK ENDS\r
+ \r
+ PUBLIC READ_POINT\r
+ \r
+ 02D2 READ_POINT PROC FAR\r
+ \r
+ PUSHx BP, DI ; Preserve Registers\r
+ 02D2 55 1 PUSH BP ; Save R1\r
+ 02D3 57 2 PUSH DI ; Save R1\r
+ 02D4 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 02D6 C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ \r
+ 02DA 8B 46 08 MOV AX, [BP].RP_Ypos ; Get Line # of Pixel\r
+ 02DD F7 26 0000 R MUL SCREEN_WIDTH ; Get Offset to Start of Line\r
+ \r
+ 02E1 8B 5E 0A MOV BX, [BP].RP_Xpos ; Get Xpos\r
+ 02E4 8B CB MOV CX, BX\r
+ 02E6 C1 EB 02 SHR BX, 2 ; X offset (Bytes) = Xpos/4\r
+ 02E9 03 D8 ADD BX, AX ; Offset = Width*Ypos + Xpos/4\r
+ \r
+ 02EB B0 04 MOV AL, READ_MAP ; GC Read Mask Register\r
+ 02ED 8A E1 MOV AH, CL ; Get Xpos\r
+ 02EF 80 E4 03 AND AH, PLANE_BITS ; & mask out Plane #\r
+ OUT_16 GC_INDEX, AX ; Select Plane to read in\r
+ 02F2 BA 03CE 1 MOV DX, GC_INDEX ; then Select Register\r
+ 02F5 EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ \r
+ CLR AH ; Clear Return Value Hi byte\r
+ 02F6 32 E4 1 XOR AH, AH ; Set Register = 0\r
+ 02F8 26: 8A 01 MOV AL, ES:[DI+BX] ; Get Color of Pixel\r
+ \r
+ POPx DI, BP ; Restore Saved Registers\r
+ 02FB 5F 1 POP DI ; Restore R1\r
+ 02FC 5D 2 POP BP ; Restore R1\r
+ 02FD CA 0004 RET 4 ; Exit and Clean up Stack\r
+ \r
+ 0300 READ_POINT ENDP\r
+ \r
+ \r
+ ;======================================================\r
+ ;FILL_BLOCK (Xpos1%, Ypos1%, Xpos2%, Ypos2%, ColorNum%)\r
+ ;======================================================\r
+ ;\r
+ ; Fills a rectangular block on the active display Page\r
+ ;\r
+ ; ENTRY: Xpos1 = Left X position of area to fill\r
+ ; Ypos1 = Top Y position of area to fill\r
+ ; Xpos2 = Right X position of area to fill\r
+ ; Ypos2 = Bottom Y position of area to fill\r
+ ; ColorNum = Color to fill area with\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 0016 FB_STACK STRUC\r
+ 0000 0000 0000 0000 DW ?x4 ; DS, DI, SI, BP\r
+ 0000\r
+ 0008 00000000 DD ? ; Caller\r
+ 000C 00 00 FB_Color DB ?,? ; Fill Color\r
+ 000E 0000 FB_Ypos2 DW ? ; Y pos of Lower Right Pixel\r
+ 0010 0000 FB_Xpos2 DW ? ; X pos of Lower Right Pixel\r
+ 0012 0000 FB_Ypos1 DW ? ; Y pos of Upper Left Pixel\r
+ 0014 0000 FB_Xpos1 DW ? ; X pos of Upper Left Pixel\r
+ FB_STACK ENDS\r
+ \r
+ PUBLIC FILL_BLOCK\r
+ \r
+ 0300 FILL_BLOCK PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 0300 55 1 PUSH BP ; Save R1\r
+ 0301 1E 2 PUSH DS ; Save R1\r
+ 0302 56 3 PUSH SI ; Save R1\r
+ 0303 57 4 PUSH DI ; Save R1\r
+ 0304 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 0306 C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ 030A FC CLD ; Direction Flag = Forward\r
+ \r
+ OUT_8 SC_INDEX, MAP_MASK ; Set up for Plane Select\r
+ 030B BA 03C4 1 MOV DX, SC_INDEX ; then Select Register\r
+ 030E B0 02 1 MOV AL, MAP_MASK ; then Get Data Value\r
+ 0310 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ ; Validate Pixel Coordinates\r
+ ; If necessary, Swap so X1 <= X2, Y1 <= Y2\r
+ \r
+ 0311 8B 46 12 MOV AX, [BP].FB_Ypos1 ; AX = Y1 is Y1< Y2?\r
+ 0314 8B 5E 0E MOV BX, [BP].FB_Ypos2 ; BX = Y2\r
+ 0317 3B C3 CMP AX, BX\r
+ 0319 7E 04 JLE @FB_NOSWAP1\r
+ \r
+ 031B 89 5E 12 MOV [BP].FB_Ypos1, BX ; Swap Y1 and Y2 and save Y1\r
+ 031E 93 XCHG AX, BX ; on stack for future use\r
+ \r
+ 031F @FB_NOSWAP1:\r
+ 031F 2B D8 SUB BX, AX ; Get Y width\r
+ 0321 43 INC BX ; Add 1 to avoid 0 value\r
+ 0322 89 5E 0E MOV [BP].FB_Ypos2, BX ; Save in Ypos2\r
+ \r
+ 0325 F7 26 0000 R MUL SCREEN_WIDTH ; Mul Y1 by Bytes per Line\r
+ 0329 03 F8 ADD DI, AX ; DI = Start of Line Y1\r
+ \r
+ 032B 8B 46 14 MOV AX, [BP].FB_Xpos1 ; Check X1 <= X2\r
+ 032E 8B 5E 10 MOV BX, [BP].FB_Xpos2 ;\r
+ 0331 3B C3 CMP AX, BX\r
+ 0333 7E 04 JLE @FB_NOSWAP2 ; Skip Ahead if Ok\r
+ \r
+ 0335 89 46 10 MOV [BP].FB_Xpos2, AX ; Swap X1 AND X2 and save X2\r
+ 0338 93 XCHG AX, BX ; on stack for future use\r
+ \r
+ ; All our Input Values are in order, Now determine\r
+ ; How many full "bands" 4 pixels wide (aligned) there\r
+ ; are, and if there are partial bands (<4 pixels) on\r
+ ; the left and right edges.\r
+ \r
+ 0339 @FB_NOSWAP2:\r
+ 0339 8B D0 MOV DX, AX ; DX = X1 (Pixel Position)\r
+ 033B C1 EA 02 SHR DX, 2 ; DX/4 = Bytes into Line\r
+ 033E 03 FA ADD DI, DX ; DI = Addr of Upper-Left Corner\r
+ \r
+ 0340 8B CB MOV CX, BX ; CX = X2 (Pixel Position)\r
+ 0342 C1 E9 02 SHR CX, 2 ; CX/4 = Bytes into Line\r
+ \r
+ 0345 3B D1 CMP DX, CX ; Start and end in same band?\r
+ 0347 75 03 JNE @FB_NORMAL ; if not, check for l & r edges\r
+ 0349 E9 0086 JMP @FB_ONE_BAND_ONLY ; if so, then special processing\r
+ \r
+ 034C @FB_NORMAL:\r
+ 034C 2B CA SUB CX, DX ; CX = # bands -1\r
+ 034E 8B F0 MOV SI, AX ; SI = PLANE#(X1)\r
+ 0350 83 E6 03 AND SI, PLANE_BITS ; if Left edge is aligned then\r
+ 0353 74 27 JZ @FB_L_PLANE_FLUSH ; no special processing..\r
+ \r
+ ; Draw "Left Edge" vertical strip of 1-3 pixels...\r
+ \r
+ OUT_8 SC_Data, Left_Clip_Mask[SI] ; Set Left Edge Plane Mask\r
+ 0355 BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 0358 2E: 8A 84 0000 R 1 MOV AL, Left_Clip_Mask[SI] ; then Get Data Value\r
+ 035D EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 035E 8B F7 MOV SI, DI ; SI = Copy of Start Addr (UL)\r
+ \r
+ 0360 8B 56 0E MOV DX, [BP].FB_Ypos2 ; Get # of Lines to draw\r
+ 0363 8A 46 0C MOV AL, [BP].FB_Color ; Get Fill Color\r
+ 0366 8B 1E 0000 R MOV BX, SCREEN_WIDTH ; Get Vertical increment Value\r
+ \r
+ 036A @FB_LEFT_LOOP:\r
+ 036A 26: 88 04 MOV ES:[SI], AL ; Fill in Left Edge Pixels\r
+ 036D 03 F3 ADD SI, BX ; Point to Next Line (Below)\r
+ LOOPjz DX, @FB_LEFT_CONT ; Exit loop if all Lines Drawn\r
+ 036F 4A 1 DEC DX ; Counter--\r
+ 0370 74 08 1 JZ @FB_LEFT_CONT ; Jump if 0\r
+ \r
+ 0372 26: 88 04 MOV ES:[SI], AL ; Fill in Left Edge Pixels\r
+ 0375 03 F3 ADD SI, BX ; Point to Next Line (Below)\r
+ LOOPx DX, @FB_LEFT_LOOP ; loop until left strip is drawn\r
+ 0377 4A 1 DEC DX ; Counter--\r
+ 0378 75 F0 1 JNZ @FB_LEFT_LOOP ; Jump if not 0\r
+ \r
+ 037A @FB_LEFT_CONT:\r
+ \r
+ 037A 47 INC DI ; Point to Middle (or Right) Block\r
+ 037B 49 DEC CX ; Reset CX instead of JMP @FB_RIGHT\r
+ \r
+ 037C @FB_L_PLANE_FLUSH:\r
+ 037C 41 INC CX ; Add in Left band to middle block\r
+ \r
+ ; DI = Addr of 1st middle Pixel (band) to fill\r
+ ; CX = # of Bands to fill -1\r
+ \r
+ 037D @FB_RIGHT:\r
+ 037D 8B 76 10 MOV SI, [BP].FB_Xpos2 ; Get Xpos2\r
+ 0380 83 E6 03 AND SI, PLANE_BITS ; Get Plane values\r
+ 0383 83 FE 03 CMP SI, 0003 ; Plane = 3?\r
+ 0386 74 2B JE @FB_R_EDGE_FLUSH ; Hey, add to middle\r
+ \r
+ ; Draw "Right Edge" vertical strip of 1-3 pixels...\r
+ \r
+ OUT_8 SC_Data, Right_Clip_Mask[SI] ; Right Edge Plane Mask\r
+ 0388 BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 038B 2E: 8A 84 0004 R 1 MOV AL, Right_Clip_Mask[SI] ; then Get Data Value\r
+ 0390 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0391 8B F7 MOV SI, DI ; Get Addr of Left Edge\r
+ 0393 03 F1 ADD SI, CX ; Add Width-1 (Bands)\r
+ 0395 4E DEC SI ; To point to top of Right Edge\r
+ \r
+ 0396 8B 56 0E MOV DX, [BP].FB_Ypos2 ; Get # of Lines to draw\r
+ 0399 8A 46 0C MOV AL, [BP].FB_Color ; Get Fill Color\r
+ 039C 8B 1E 0000 R MOV BX, SCREEN_WIDTH ; Get Vertical increment Value\r
+ \r
+ 03A0 @FB_RIGHT_LOOP:\r
+ 03A0 26: 88 04 MOV ES:[SI], AL ; Fill in Right Edge Pixels\r
+ 03A3 03 F3 ADD SI, BX ; Point to Next Line (Below)\r
+ LOOPjz DX, @FB_RIGHT_CONT ; Exit loop if all Lines Drawn\r
+ 03A5 4A 1 DEC DX ; Counter--\r
+ 03A6 74 08 1 JZ @FB_RIGHT_CONT ; Jump if 0\r
+ \r
+ 03A8 26: 88 04 MOV ES:[SI], AL ; Fill in Right Edge Pixels\r
+ 03AB 03 F3 ADD SI, BX ; Point to Next Line (Below)\r
+ LOOPx DX, @FB_RIGHT_LOOP ; loop until left strip is drawn\r
+ 03AD 4A 1 DEC DX ; Counter--\r
+ 03AE 75 F0 1 JNZ @FB_RIGHT_LOOP ; Jump if not 0\r
+ \r
+ 03B0 @FB_RIGHT_CONT:\r
+ \r
+ 03B0 49 DEC CX ; Minus 1 for Middle bands\r
+ 03B1 74 51 JZ @FB_EXIT ; Uh.. no Middle bands...\r
+ \r
+ 03B3 @FB_R_EDGE_FLUSH:\r
+ \r
+ ; DI = Addr of Upper Left block to fill\r
+ ; CX = # of Bands to fill in (width)\r
+ \r
+ OUT_8 SC_Data, ALL_PLANES ; Write to All Planes\r
+ 03B3 BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 03B6 B0 0F 1 MOV AL, ALL_PLANES ; then Get Data Value\r
+ 03B8 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 03B9 8B 16 0000 R MOV DX, SCREEN_WIDTH ; DX = DI Increment\r
+ 03BD 2B D1 SUB DX, CX ; = Screen_Width-# Planes Filled\r
+ \r
+ 03BF 8B D9 MOV BX, CX ; BX = Quick Refill for CX\r
+ 03C1 8B 76 0E MOV SI, [BP].FB_Ypos2 ; SI = # of Line to Fill\r
+ 03C4 8A 46 0C MOV AL, [BP].FB_Color ; Get Fill Color\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 5 - 1\r
+\r
+\r
+ \r
+ 03C7 @FB_MIDDLE_LOOP:\r
+ 03C7 F3/ AA REP STOSB ; Fill in entire line\r
+ \r
+ 03C9 8B CB MOV CX, BX ; Recharge CX (Line Width)\r
+ 03CB 03 FA ADD DI, DX ; Point to start of Next Line\r
+ LOOPx SI, @FB_MIDDLE_LOOP ; Loop until all lines drawn\r
+ 03CD 4E 1 DEC SI ; Counter--\r
+ 03CE 75 F7 1 JNZ @FB_MIDDLE_LOOP ; Jump if not 0\r
+ \r
+ 03D0 EB 32 JMP s @FB_EXIT ; Outa here\r
+ \r
+ 03D2 @FB_ONE_BAND_ONLY:\r
+ 03D2 8B F0 MOV SI, AX ; Get Left Clip Mask, Save X1\r
+ 03D4 83 E6 03 AND SI, PLANE_BITS ; Mask out Row #\r
+ 03D7 2E: 8A 84 0000 R MOV AL, Left_Clip_Mask[SI] ; Get Left Edge Mask\r
+ 03DC 8B F3 MOV SI, BX ; Get Right Clip Mask, Save X2\r
+ 03DE 83 E6 03 AND SI, PLANE_BITS ; Mask out Row #\r
+ 03E1 2E: 22 84 0004 R AND AL, Right_Clip_Mask[SI] ; Get Right Edge Mask byte\r
+ \r
+ OUT_8 SC_Data, AL ; Clip For Left & Right Masks\r
+ 03E6 BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 03E9 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 03EA 8B 4E 0E MOV CX, [BP].FB_Ypos2 ; Get # of Lines to draw\r
+ 03ED 8A 46 0C MOV AL, [BP].FB_Color ; Get Fill Color\r
+ 03F0 8B 1E 0000 R MOV BX, SCREEN_WIDTH ; Get Vertical increment Value\r
+ \r
+ 03F4 @FB_ONE_LOOP:\r
+ 03F4 26: 88 05 MOV ES:[DI], AL ; Fill in Pixels\r
+ 03F7 03 FB ADD DI, BX ; Point to Next Line (Below)\r
+ LOOPjz CX, @FB_EXIT ; Exit loop if all Lines Drawn\r
+ 03F9 49 1 DEC CX ; Counter--\r
+ 03FA 74 08 1 JZ @FB_EXIT ; Jump if 0\r
+ \r
+ 03FC 26: 88 05 MOV ES:[DI], AL ; Fill in Pixels\r
+ 03FF 03 FB ADD DI, BX ; Point to Next Line (Below)\r
+ LOOPx CX, @FB_ONE_LOOP ; loop until left strip is drawn\r
+ 0401 49 1 DEC CX ; Counter--\r
+ 0402 75 F0 1 JNZ @FB_ONE_LOOP ; Jump if not 0\r
+ \r
+ 0404 @FB_EXIT:\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 0404 5F 1 POP DI ; Restore R1\r
+ 0405 5E 2 POP SI ; Restore R1\r
+ 0406 1F 3 POP DS ; Restore R1\r
+ 0407 5D 4 POP BP ; Restore R1\r
+ 0408 CA 000A RET 10 ; Exit and Clean up Stack\r
+ \r
+ 040B FILL_BLOCK ENDP\r
+ \r
+ \r
+ ;=====================================================\r
+ ;DRAW_LINE (Xpos1%, Ypos1%, Xpos2%, Ypos2%, ColorNum%)\r
+ ;=====================================================\r
+ ;\r
+ ; Draws a Line on the active display page\r
+ ;\r
+ ; ENTRY: Xpos1 = X position of first point on line\r
+ ; Ypos1 = Y position of first point on line\r
+ ; Xpos2 = X position of last point on line\r
+ ; Ypos2 = Y position of last point on line\r
+ ; ColorNum = Color to draw line with\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 0014 DL_STACK STRUC\r
+ 0000 0000 0000 0000 DW ?x3 ; DI, SI, BP\r
+ 0006 00000000 DD ? ; Caller\r
+ 000A 00 00 DL_ColorF DB ?,? ; Line Draw Color\r
+ 000C 0000 DL_Ypos2 DW ? ; Y pos of last point\r
+ 000E 0000 DL_Xpos2 DW ? ; X pos of last point\r
+ 0010 0000 DL_Ypos1 DW ? ; Y pos of first point\r
+ 0012 0000 DL_Xpos1 DW ? ; X pos of first point\r
+ DL_STACK ENDS\r
+ \r
+ PUBLIC DRAW_LINE\r
+ \r
+ 040B DRAW_LINE PROC FAR\r
+ \r
+ PUSHx BP, SI, DI ; Preserve Important Registers\r
+ 040B 55 1 PUSH BP ; Save R1\r
+ 040C 56 2 PUSH SI ; Save R1\r
+ 040D 57 3 PUSH DI ; Save R1\r
+ 040E 8B EC MOV BP, SP ; Set up Stack Frame\r
+ 0410 FC CLD ; Direction Flag = Forward\r
+ \r
+ OUT_8 SC_INDEX, MAP_MASK ; Set up for Plane Select\r
+ 0411 BA 03C4 1 MOV DX, SC_INDEX ; then Select Register\r
+ 0414 B0 02 1 MOV AL, MAP_MASK ; then Get Data Value\r
+ 0416 EE 1 OUT DX, AL ; Set I/O Register\r
+ 0417 8A 6E 0A MOV CH, [BP].DL_ColorF ; Save Line Color in CH\r
+ \r
+ ; Check Line Type\r
+ \r
+ 041A 8B 76 12 MOV SI, [BP].DL_Xpos1 ; AX = X1 is X1< X2?\r
+ 041D 8B 7E 0E MOV DI, [BP].DL_Xpos2 ; DX = X2\r
+ 0420 3B F7 CMP SI, DI ; Is X1 < X2\r
+ 0422 74 5D JE @DL_VLINE ; If X1=X2, Draw Vertical Line\r
+ 0424 7C 02 JL @DL_NOSWAP1 ; If X1 < X2, don't swap\r
+ \r
+ 0426 87 F7 XCHG SI, DI ; X2 IS > X1, SO SWAP THEM\r
+ \r
+ 0428 @DL_NOSWAP1:\r
+ \r
+ ; SI = X1, DI = X2\r
+ \r
+ 0428 8B 46 10 MOV AX, [BP].DL_Ypos1 ; AX = Y1 is Y1 <> Y2?\r
+ 042B 3B 46 0C CMP AX, [BP].DL_Ypos2 ; Y1 = Y2?\r
+ 042E 74 03 JE @DL_HORZ ; If so, Draw a Horizontal Line\r
+ \r
+ 0430 E9 0094 JMP @DL_BREZHAM ; Diagonal line... go do it...\r
+ \r
+ ; This Code draws a Horizontal Line in Mode X where:\r
+ ; SI = X1, DI = X2, and AX = Y1/Y2\r
+ \r
+ 0433 @DL_HORZ:\r
+ \r
+ 0433 F7 26 0000 R MUL SCREEN_WIDTH ; Offset = Ypos * Screen_Width\r
+ 0437 8B D0 MOV DX, AX ; CX = Line offset into Page\r
+ \r
+ 0439 8B C6 MOV AX, SI ; Get Left edge, Save X1\r
+ 043B 83 E6 03 AND SI, PLANE_BITS ; Mask out Row #\r
+ 043E 2E: 8A 9C 0000 R MOV BL, Left_Clip_Mask[SI] ; Get Left Edge Mask\r
+ 0443 8B CF MOV CX, DI ; Get Right edge, Save X2\r
+ 0445 83 E7 03 AND DI, PLANE_BITS ; Mask out Row #\r
+ 0448 2E: 8A BD 0004 R MOV BH, Right_Clip_Mask[DI] ; Get Right Edge Mask byte\r
+ \r
+ 044D C1 E8 02 SHR AX, 2 ; Get X1 Byte # (=X1/4)\r
+ 0450 C1 E9 02 SHR CX, 2 ; Get X2 Byte # (=X2/4)\r
+ \r
+ 0453 C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ 0457 03 FA ADD DI, DX ; Point to Start of Line\r
+ 0459 03 F8 ADD DI, AX ; Point to Pixel X1\r
+ \r
+ 045B 2B C8 SUB CX, AX ; CX = # Of Bands (-1) to set\r
+ 045D 75 02 JNZ @DL_LONGLN ; jump if longer than one segment\r
+ \r
+ 045F 22 DF AND BL, BH ; otherwise, merge clip masks\r
+ \r
+ 0461 @DL_LONGLN:\r
+ \r
+ OUT_8 SC_Data, BL ; Set the Left Clip Mask\r
+ 0461 BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 0464 8A C3 1 MOV AL, BL ; then Get Data Value\r
+ 0466 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0467 8A 46 0A MOV AL, [BP].DL_ColorF ; Get Line Color\r
+ 046A 8A D8 MOV BL, AL ; BL = Copy of Line Color\r
+ 046C AA STOSB ; Set Left (1-4) Pixels\r
+ \r
+ 046D E3 55 JCXZ @DL_EXIT ; Done if only one Line Segment\r
+ \r
+ 046F 49 DEC CX ; CX = # of Middle Segments\r
+ 0470 74 07 JZ @DL_XRSEG ; If no middle segments....\r
+ \r
+ ; Draw Middle Segments\r
+ \r
+ OUT_8 DX, ALL_PLANES ; Write to ALL Planes\r
+ 0472 B0 0F 1 MOV AL, ALL_PLANES ; then Get Data Value\r
+ 0474 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0475 8A C3 MOV AL, BL ; Get Color from BL\r
+ 0477 F3/ AA REP STOSB ; Draw Middle (4 Pixel) Segments\r
+ \r
+ 0479 @DL_XRSEG:\r
+ OUT_8 DX, BH ; Select Planes for Right Clip Mask\r
+ 0479 8A C7 1 MOV AL, BH ; then Get Data Value\r
+ 047B EE 1 OUT DX, AL ; Set I/O Register\r
+ 047C 8A C3 MOV AL, BL ; Get Color Value\r
+ 047E AA STOSB ; Draw Right (1-4) Pixels\r
+ \r
+ 047F EB 43 JMP s @DL_EXIT ; We Are Done...\r
+ \r
+ \r
+ ; This Code Draws A Vertical Line. On entry:\r
+ ; CH = Line Color, SI & DI = X1\r
+ \r
+ 0481 @DL_VLINE:\r
+ \r
+ 0481 8B 46 10 MOV AX, [BP].DL_Ypos1 ; AX = Y1\r
+ 0484 8B 76 0C MOV SI, [BP].DL_Ypos2 ; SI = Y2\r
+ 0487 3B C6 CMP AX, SI ; Is Y1 < Y2?\r
+ 0489 7E 01 JLE @DL_NOSWAP2 ; if so, Don't Swap them\r
+ \r
+ 048B 96 XCHG AX, SI ; Ok, NOW Y1 < Y2\r
+ \r
+ 048C @DL_NOSWAP2:\r
+ \r
+ 048C 2B F0 SUB SI, AX ; SI = Line Height (Y2-Y1+1)\r
+ 048E 46 INC SI\r
+ \r
+ ; AX = Y1, DI = X1, Get offset into Page into AX\r
+ \r
+ 048F F7 26 0000 R MUL SCREEN_WIDTH ; Offset = Y1 (AX) * Screen Width\r
+ 0493 8B D7 MOV DX, DI ; Copy Xpos into DX\r
+ 0495 C1 EF 02 SHR DI, 2 ; DI = Xpos/4\r
+ 0498 03 C7 ADD AX, DI ; DI = Xpos/4 + ScreenWidth * Y1\r
+ \r
+ 049A C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ 049E 03 F8 ADD DI, AX ; Point to Pixel X1, Y1\r
+ \r
+ ;Select Plane\r
+ \r
+ 04A0 8A CA MOV CL, DL ; CL = Save X1\r
+ 04A2 80 E1 03 AND CL, PLANE_BITS ; Get X1 MOD 4 (Plane #)\r
+ 04A5 B8 0102 MOV AX, MAP_MASK_PLANE1 ; Code to set Plane #1\r
+ 04A8 D2 E4 SHL AH, CL ; Change to Correct Plane #\r
+ OUT_16 SC_Index, AX ; Select Plane\r
+ 04AA BA 03C4 1 MOV DX, SC_Index ; then Select Register\r
+ 04AD EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ \r
+ 04AE 8A C5 MOV AL, CH ; Get Saved Color\r
+ 04B0 8B 1E 0000 R MOV BX, SCREEN_WIDTH ; Get Offset to Advance Line By\r
+ \r
+ 04B4 @DL_VLoop:\r
+ 04B4 26: 88 05 MOV ES:[DI], AL ; Draw Single Pixel\r
+ 04B7 03 FB ADD DI, BX ; Point to Next Line\r
+ LOOPjz SI, @DL_EXIT ; Lines--, Exit if done\r
+ 04B9 4E 1 DEC SI ; Counter--\r
+ 04BA 74 08 1 JZ @DL_EXIT ; Jump if 0\r
+ \r
+ 04BC 26: 88 05 MOV ES:[DI], AL ; Draw Single Pixel\r
+ 04BF 03 FB ADD DI, BX ; Point to Next Line\r
+ LOOPx SI, @DL_VLoop ; Lines--, Loop until Done\r
+ 04C1 4E 1 DEC SI ; Counter--\r
+ 04C2 75 F0 1 JNZ @DL_VLoop ; Jump if not 0\r
+ \r
+ 04C4 @DL_EXIT:\r
+ \r
+ 04C4 E9 0157 JMP @DL_EXIT2 ; Done!\r
+ \r
+ ; This code Draws a diagonal line in Mode X\r
+ \r
+ 04C7 @DL_BREZHAM:\r
+ 04C7 C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ \r
+ 04CB 8B 46 10 MOV AX, [BP].DL_Ypos1 ; get Y1 value\r
+ 04CE 8B 5E 0C MOV BX, [BP].DL_Ypos2 ; get Y2 value\r
+ 04D1 8B 4E 12 MOV CX, [BP].DL_Xpos1 ; Get Starting Xpos\r
+ \r
+ 04D4 3B D8 CMP BX, AX ; Y2-Y1 is?\r
+ 04D6 73 04 JNC @DL_DeltaYOK ; if Y2>=Y1 then goto...\r
+ \r
+ 04D8 93 XCHG BX, AX ; Swap em...\r
+ 04D9 8B 4E 0E MOV CX, [BP].DL_Xpos2 ; Get New Starting Xpos\r
+ \r
+ 04DC @DL_DeltaYOK:\r
+ 04DC F7 26 0000 R MUL SCREEN_WIDTH ; Offset = SCREEN_WIDTH * Y1\r
+ \r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 6 - 1\r
+\r
+\r
+ 04E0 03 F8 ADD DI, AX ; DI -> Start of Line Y1 on Page\r
+ 04E2 8B C1 MOV AX, CX ; AX = Xpos (X1)\r
+ 04E4 C1 E8 02 SHR AX, 2 ; /4 = Byte Offset into Line\r
+ 04E7 03 F8 ADD DI, AX ; DI = Starting pos (X1,Y1)\r
+ \r
+ 04E9 B0 11 MOV AL, 11h ; Staring Mask\r
+ 04EB 80 E1 03 AND CL, PLANE_BITS ; Get Plane #\r
+ 04EE D2 E0 SHL AL, CL ; and shift into place\r
+ 04F0 8A 66 0A MOV AH, [BP].DL_ColorF ; Color in Hi Bytes\r
+ \r
+ 04F3 50 PUSH AX ; Save Mask,Color...\r
+ \r
+ 04F4 8A E0 MOV AH, AL ; Plane # in AH\r
+ 04F6 B0 02 MOV AL, MAP_MASK ; Select Plane Register\r
+ OUT_16 SC_Index, AX ; Select initial plane\r
+ 04F8 BA 03C4 1 MOV DX, SC_Index ; then Select Register\r
+ 04FB EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ \r
+ 04FC 8B 46 12 MOV AX, [BP].DL_Xpos1 ; get X1 value\r
+ 04FF 8B 5E 10 MOV BX, [BP].DL_Ypos1 ; get Y1 value\r
+ 0502 8B 4E 0E MOV CX, [BP].DL_Xpos2 ; get X2 value\r
+ 0505 8B 56 0C MOV DX, [BP].DL_Ypos2 ; get Y2 value\r
+ \r
+ 0508 8B 2E 0000 R MOV BP, SCREEN_WIDTH ; Use BP for Line width to\r
+ ; to avoid extra memory access\r
+ \r
+ 050C 2B D3 SUB DX, BX ; figure Delta_Y\r
+ 050E 73 05 JNC @DL_DeltaYOK2 ; jump if Y2 >= Y1\r
+ \r
+ 0510 03 DA ADD BX, DX ; put Y2 into Y1\r
+ 0512 F7 DA NEG DX ; abs(Delta_Y)\r
+ 0514 91 XCHG AX, CX ; and exchange X1 and X2\r
+ \r
+ 0515 @DL_DeltaYOK2:\r
+ 0515 BB 8000 MOV BX, 08000H ; seed for fraction accumulator\r
+ \r
+ 0518 2B C8 SUB CX, AX ; figure Delta_X\r
+ 051A 72 03 JC @DL_DrawLeft ; if negative, go left\r
+ \r
+ 051C E9 0084 JMP @DL_DrawRight ; Draw Line that slopes right\r
+ \r
+ 051F @DL_DrawLeft:\r
+ \r
+ 051F F7 D9 NEG CX ; abs(Delta_X)\r
+ \r
+ 0521 3B CA CMP CX, DX ; is Delta_X < Delta_Y?\r
+ 0523 72 41 JB @DL_SteepLeft ; yes, so go do steep line\r
+ ; (Delta_Y iterations)\r
+ \r
+ ; Draw a Shallow line to the left in Mode X\r
+ \r
+ 0525 @DL_ShallowLeft:\r
+ CLR AX ; zero low word of Delta_Y * 10000h\r
+ 0525 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 0527 2B C2 SUB AX, DX ; DX:AX <- DX * 0FFFFh\r
+ 0529 83 DA 00 SBB DX, 0 ; include carry\r
+ 052C F7 F1 DIV CX ; divide by Delta_X\r
+ \r
+ 052E 8B F3 MOV SI, BX ; SI = Accumulator\r
+ 0530 8B D8 MOV BX, AX ; BX = Add fraction\r
+ 0532 58 POP AX ; Get Color, Bit mask\r
+ 0533 BA 03C5 MOV DX, SC_Data ; Sequence controller data register\r
+ 0536 41 INC CX ; Inc Delta_X so we can unroll loop\r
+ \r
+ ; Loop (x2) to Draw Pixels, Move Left, and Maybe Down...\r
+ \r
+ 0537 @DL_SLLLoop:\r
+ 0537 26: 88 25 MOV ES:[DI], AH ; set first pixel, plane data set up\r
+ LOOPjz CX, @DL_SLLExit ; Delta_X--, Exit if done\r
+ 053A 49 1 DEC CX ; Counter--\r
+ 053B 74 26 1 JZ @DL_SLLExit ; Jump if 0\r
+ \r
+ 053D 03 F3 ADD SI, BX ; add numerator to accumulator\r
+ 053F 73 02 JNC @DL_SLLL2nc ; move down on carry\r
+ \r
+ 0541 03 FD ADD DI, BP ; Move Down one line...\r
+ \r
+ 0543 @DL_SLLL2nc:\r
+ 0543 4F DEC DI ; Left one addr\r
+ 0544 D0 C8 ROR AL, 1 ; Move Left one plane, back on 0 1 2\r
+ 0546 3C 87 CMP AL, 87h ; wrap?, if AL <88 then Carry set\r
+ 0548 83 D7 00 ADC DI, 0 ; Adjust Address: DI = DI + Carry\r
+ 054B EE OUT DX, AL ; Set up New Bit Plane mask\r
+ \r
+ 054C 26: 88 25 MOV ES:[DI], AH ; set pixel\r
+ LOOPjz CX, @DL_SLLExit ; Delta_X--, Exit if done\r
+ 054F 49 1 DEC CX ; Counter--\r
+ 0550 74 11 1 JZ @DL_SLLExit ; Jump if 0\r
+ \r
+ 0552 03 F3 ADD SI, BX ; add numerator to accumulator,\r
+ 0554 73 02 JNC @DL_SLLL3nc ; move down on carry\r
+ \r
+ 0556 03 FD ADD DI, BP ; Move Down one line...\r
+ \r
+ 0558 @DL_SLLL3nc: ; Now move left a pixel...\r
+ 0558 4F DEC DI ; Left one addr\r
+ 0559 D0 C8 ROR AL, 1 ; Move Left one plane, back on 0 1 2\r
+ 055B 3C 87 CMP AL, 87h ; Wrap?, if AL <88 then Carry set\r
+ 055D 83 D7 00 ADC DI, 0 ; Adjust Address: DI = DI + Carry\r
+ 0560 EE OUT DX, AL ; Set up New Bit Plane mask\r
+ 0561 EB D4 JMP s @DL_SLLLoop ; loop until done\r
+ \r
+ 0563 @DL_SLLExit:\r
+ 0563 E9 00B8 JMP @DL_EXIT2 ; and exit\r
+ \r
+ ; Draw a steep line to the left in Mode X\r
+ \r
+ 0566 @DL_SteepLeft:\r
+ CLR AX ; zero low word of Delta_Y * 10000h\r
+ 0566 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 0568 87 D1 XCHG DX, CX ; Delta_Y switched with Delta_X\r
+ 056A F7 F1 DIV CX ; divide by Delta_Y\r
+ \r
+ 056C 8B F3 MOV SI, BX ; SI = Accumulator\r
+ 056E 8B D8 MOV BX, AX ; BX = Add Fraction\r
+ 0570 58 POP AX ; Get Color, Bit mask\r
+ 0571 BA 03C5 MOV DX, SC_Data ; Sequence controller data register\r
+ 0574 41 INC CX ; Inc Delta_Y so we can unroll loop\r
+ \r
+ ; Loop (x2) to Draw Pixels, Move Down, and Maybe left\r
+ \r
+ 0575 @DL_STLLoop:\r
+ \r
+ 0575 26: 88 25 MOV ES:[DI], AH ; set first pixel\r
+ LOOPjz CX, @DL_STLExit ; Delta_Y--, Exit if done\r
+ 0578 49 1 DEC CX ; Counter--\r
+ 0579 74 26 1 JZ @DL_STLExit ; Jump if 0\r
+ \r
+ 057B 03 F3 ADD SI, BX ; add numerator to accumulator\r
+ 057D 73 09 JNC @DL_STLnc2 ; No carry, just move down!\r
+ \r
+ 057F 4F DEC DI ; Move Left one addr\r
+ 0580 D0 C8 ROR AL, 1 ; Move Left one plane, back on 0 1 2\r
+ 0582 3C 87 CMP AL, 87h ; Wrap?, if AL <88 then Carry set\r
+ 0584 83 D7 00 ADC DI, 0 ; Adjust Address: DI = DI + Carry\r
+ 0587 EE OUT DX, AL ; Set up New Bit Plane mask\r
+ \r
+ 0588 @DL_STLnc2:\r
+ 0588 03 FD ADD DI, BP ; advance to next line.\r
+ \r
+ 058A 26: 88 25 MOV ES:[DI], AH ; set pixel\r
+ LOOPjz CX, @DL_STLExit ; Delta_Y--, Exit if done\r
+ 058D 49 1 DEC CX ; Counter--\r
+ 058E 74 11 1 JZ @DL_STLExit ; Jump if 0\r
+ \r
+ 0590 03 F3 ADD SI, BX ; add numerator to accumulator\r
+ 0592 73 09 JNC @DL_STLnc3 ; No carry, just move down!\r
+ \r
+ 0594 4F DEC DI ; Move Left one addr\r
+ 0595 D0 C8 ROR AL, 1 ; Move Left one plane, back on 0 1 2\r
+ 0597 3C 87 CMP AL, 87h ; Wrap?, if AL <88 then Carry set\r
+ 0599 83 D7 00 ADC DI, 0 ; Adjust Address: DI = DI + Carry\r
+ 059C EE OUT DX, AL ; Set up New Bit Plane mask\r
+ \r
+ 059D @DL_STLnc3:\r
+ 059D 03 FD ADD DI, BP ; advance to next line.\r
+ 059F EB D4 JMP s @DL_STLLoop ; Loop until done\r
+ \r
+ 05A1 @DL_STLExit:\r
+ 05A1 EB 7B JMP @DL_EXIT2 ; and exit\r
+ \r
+ ; Draw a line that goes to the Right...\r
+ \r
+ 05A3 @DL_DrawRight:\r
+ 05A3 3B CA CMP CX, DX ; is Delta_X < Delta_Y?\r
+ 05A5 72 3E JB @DL_SteepRight ; yes, so go do steep line\r
+ ; (Delta_Y iterations)\r
+ \r
+ ; Draw a Shallow line to the Right in Mode X\r
+ \r
+ 05A7 @DL_ShallowRight:\r
+ CLR AX ; zero low word of Delta_Y * 10000h\r
+ 05A7 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 05A9 2B C2 SUB AX, DX ; DX:AX <- DX * 0FFFFh\r
+ 05AB 83 DA 00 SBB DX, 0 ; include carry\r
+ 05AE F7 F1 DIV CX ; divide by Delta_X\r
+ \r
+ 05B0 8B F3 MOV SI, BX ; SI = Accumulator\r
+ 05B2 8B D8 MOV BX, AX ; BX = Add Fraction\r
+ 05B4 58 POP AX ; Get Color, Bit mask\r
+ 05B5 BA 03C5 MOV DX, SC_Data ; Sequence controller data register\r
+ 05B8 41 INC CX ; Inc Delta_X so we can unroll loop\r
+ \r
+ ; Loop (x2) to Draw Pixels, Move Right, and Maybe Down...\r
+ \r
+ 05B9 @DL_SLRLoop:\r
+ 05B9 26: 88 25 MOV ES:[DI], AH ; set first pixel, mask is set up\r
+ LOOPjz CX, @DL_SLRExit ; Delta_X--, Exit if done..\r
+ 05BC 49 1 DEC CX ; Counter--\r
+ 05BD 74 24 1 JZ @DL_SLRExit ; Jump if 0\r
+ \r
+ 05BF 03 F3 ADD SI, BX ; add numerator to accumulator\r
+ 05C1 73 02 JNC @DL_SLR2nc ; don't move down if carry not set\r
+ \r
+ 05C3 03 FD ADD DI, BP ; Move Down one line...\r
+ \r
+ 05C5 @DL_SLR2nc: ; Now move right a pixel...\r
+ 05C5 D0 C0 ROL AL, 1 ; Move Right one addr if Plane = 0\r
+ 05C7 3C 12 CMP AL, 12h ; Wrap? if AL >12 then Carry not set\r
+ 05C9 83 D7 00 ADC DI, 0 ; Adjust Address: DI = DI + Carry\r
+ 05CC EE OUT DX, AL ; Set up New Bit Plane mask\r
+ \r
+ 05CD 26: 88 25 MOV ES:[DI], AH ; set pixel\r
+ LOOPjz CX, @DL_SLRExit ; Delta_X--, Exit if done..\r
+ 05D0 49 1 DEC CX ; Counter--\r
+ 05D1 74 10 1 JZ @DL_SLRExit ; Jump if 0\r
+ \r
+ 05D3 03 F3 ADD SI, BX ; add numerator to accumulator\r
+ 05D5 73 02 JNC @DL_SLR3nc ; don't move down if carry not set\r
+ \r
+ 05D7 03 FD ADD DI, BP ; Move Down one line...\r
+ \r
+ 05D9 @DL_SLR3nc:\r
+ 05D9 D0 C0 ROL AL, 1 ; Move Right one addr if Plane = 0\r
+ 05DB 3C 12 CMP AL, 12h ; Wrap? if AL >12 then Carry not set\r
+ 05DD 83 D7 00 ADC DI, 0 ; Adjust Address: DI = DI + Carry\r
+ 05E0 EE OUT DX, AL ; Set up New Bit Plane mask\r
+ 05E1 EB D6 JMP s @DL_SLRLoop ; loop till done\r
+ \r
+ 05E3 @DL_SLRExit:\r
+ 05E3 EB 39 JMP @DL_EXIT2 ; and exit\r
+ \r
+ ; Draw a Steep line to the Right in Mode X\r
+ \r
+ 05E5 @DL_SteepRight:\r
+ CLR AX ; zero low word of Delta_Y * 10000h\r
+ 05E5 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 05E7 87 D1 XCHG DX, CX ; Delta_Y switched with Delta_X\r
+ 05E9 F7 F1 DIV CX ; divide by Delta_Y\r
+ \r
+ 05EB 8B F3 MOV SI, BX ; SI = Accumulator\r
+ 05ED 8B D8 MOV BX, AX ; BX = Add Fraction\r
+ 05EF 58 POP AX ; Get Color, Bit mask\r
+ 05F0 BA 03C5 MOV DX, SC_Data ; Sequence controller data register\r
+ 05F3 41 INC CX ; Inc Delta_Y so we can unroll loop\r
+ \r
+ ; Loop (x2) to Draw Pixels, Move Down, and Maybe Right\r
+ \r
+ 05F4 @STRLoop:\r
+ 05F4 26: 88 25 MOV ES:[DI], AH ; set first pixel, mask is set up\r
+ LOOPjz CX, @DL_EXIT2 ; Delta_Y--, Exit if Done\r
+ 05F7 49 1 DEC CX ; Counter--\r
+ 05F8 74 24 1 JZ @DL_EXIT2 ; Jump if 0\r
+ \r
+ 05FA 03 F3 ADD SI, BX ; add numerator to accumulator\r
+ 05FC 73 08 JNC @STRnc2 ; if no carry then just go down...\r
+ \r
+ 05FE D0 C0 ROL AL, 1 ; Move Right one addr if Plane = 0\r
+ 0600 3C 12 CMP AL, 12h ; Wrap? if AL >12 then Carry not set\r
+ 0602 83 D7 00 ADC DI, 0 ; Adjust Address: DI = DI + Carry\r
+ 0605 EE OUT DX, AL ; Set up New Bit Plane mask\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 7 - 1\r
+\r
+\r
+ \r
+ 0606 @STRnc2:\r
+ 0606 03 FD ADD DI, BP ; advance to next line.\r
+ \r
+ 0608 26: 88 25 MOV ES:[DI], AH ; set pixel\r
+ LOOPjz CX, @DL_EXIT2 ; Delta_Y--, Exit if Done\r
+ 060B 49 1 DEC CX ; Counter--\r
+ 060C 74 10 1 JZ @DL_EXIT2 ; Jump if 0\r
+ \r
+ 060E 03 F3 ADD SI, BX ; add numerator to accumulator\r
+ 0610 73 08 JNC @STRnc3 ; if no carry then just go down...\r
+ \r
+ 0612 D0 C0 ROL AL, 1 ; Move Right one addr if Plane = 0\r
+ 0614 3C 12 CMP AL, 12h ; Wrap? if AL >12 then Carry not set\r
+ 0616 83 D7 00 ADC DI, 0 ; Adjust Address: DI = DI + Carry\r
+ 0619 EE OUT DX, AL ; Set up New Bit Plane mask\r
+ \r
+ 061A @STRnc3:\r
+ 061A 03 FD ADD DI, BP ; advance to next line.\r
+ 061C EB D6 JMP s @STRLoop ; loop till done\r
+ \r
+ 061E @DL_EXIT2:\r
+ POPx DI, SI, BP ; Restore Saved Registers\r
+ 061E 5F 1 POP DI ; Restore R1\r
+ 061F 5E 2 POP SI ; Restore R1\r
+ 0620 5D 3 POP BP ; Restore R1\r
+ 0621 CA 000A RET 10 ; Exit and Clean up Stack\r
+ \r
+ 0624 DRAW_LINE ENDP\r
+ \r
+ \r
+ ; ===== DAC COLOR REGISTER ROUTINES =====\r
+ \r
+ ;=================================================\r
+ ;SET_DAC_REGISTER (Register%, Red%, Green%, Blue%)\r
+ ;=================================================\r
+ ;\r
+ ; Sets a single (RGB) Vga Palette Register\r
+ ;\r
+ ; ENTRY: Register = The DAC # to modify (0-255)\r
+ ; Red = The new Red Intensity (0-63)\r
+ ; Green = The new Green Intensity (0-63)\r
+ ; Blue = The new Blue Intensity (0-63)\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 000E SDR_STACK STRUC\r
+ 0000 0000 DW ? ; BP\r
+ 0002 00000000 DD ? ; Caller\r
+ 0006 00 00 SDR_Blue DB ?,? ; Blue Data Value\r
+ 0008 00 00 SDR_Green DB ?,? ; Green Data Value\r
+ 000A 00 00 SDR_Red DB ?,? ; Red Data Value\r
+ 000C 00 00 SDR_Register DB ?,? ; Palette Register #\r
+ SDR_STACK ENDS\r
+ \r
+ PUBLIC SET_DAC_REGISTER\r
+ \r
+ 0624 SET_DAC_REGISTER PROC FAR\r
+ \r
+ 0624 55 PUSH BP ; Save BP\r
+ 0625 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ ; Select which DAC Register to modify\r
+ \r
+ OUT_8 DAC_WRITE_ADDR, [BP].SDR_Register\r
+ 0627 BA 03C8 1 MOV DX, DAC_WRITE_ADDR ; then Select Register\r
+ 062A 8A 46 0C 1 MOV AL, [BP].SDR_Register ; then Get Data Value\r
+ 062D EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 062E BA 03C9 MOV DX, PEL_DATA_REG ; Dac Data Register\r
+ OUT_8 DX, [BP].SDR_Red ; Set Red Intensity\r
+ 0631 8A 46 0A 1 MOV AL, [BP].SDR_Red ; then Get Data Value\r
+ 0634 EE 1 OUT DX, AL ; Set I/O Register\r
+ OUT_8 DX, [BP].SDR_Green ; Set Green Intensity\r
+ 0635 8A 46 08 1 MOV AL, [BP].SDR_Green ; then Get Data Value\r
+ 0638 EE 1 OUT DX, AL ; Set I/O Register\r
+ OUT_8 DX, [BP].SDR_Blue ; Set Blue Intensity\r
+ 0639 8A 46 06 1 MOV AL, [BP].SDR_Blue ; then Get Data Value\r
+ 063C EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 063D 5D POP BP ; Restore Registers\r
+ 063E CA 0008 RET 8 ; Exit & Clean Up Stack\r
+ \r
+ 0641 SET_DAC_REGISTER ENDP\r
+ \r
+ ;====================================================\r
+ ;GET_DAC_REGISTER (Register%, &Red%, &Green%, &Blue%)\r
+ ;====================================================\r
+ ;\r
+ ; Reads the RGB Values of a single Vga Palette Register\r
+ ;\r
+ ; ENTRY: Register = The DAC # to read (0-255)\r
+ ; Red = Offset to Red Variable in DS\r
+ ; Green = Offset to Green Variable in DS\r
+ ; Blue = Offset to Blue Variable in DS\r
+ ;\r
+ ; EXIT: The values of the integer variables Red,\r
+ ; Green, and Blue are set to the values\r
+ ; taken from the specified DAC register.\r
+ ;\r
+ \r
+ 000E GDR_STACK STRUC\r
+ 0000 0000 DW ? ; BP\r
+ 0002 00000000 DD ? ; Caller\r
+ 0006 0000 GDR_Blue DW ? ; Addr of Blue Data Value in DS\r
+ 0008 0000 GDR_Green DW ? ; Addr of Green Data Value in DS\r
+ 000A 0000 GDR_Red DW ? ; Addr of Red Data Value in DS\r
+ 000C 00 00 GDR_Register DB ?,? ; Palette Register #\r
+ GDR_STACK ENDS\r
+ \r
+ PUBLIC GET_DAC_REGISTER\r
+ \r
+ 0641 GET_DAC_REGISTER PROC FAR\r
+ \r
+ 0641 55 PUSH BP ; Save BP\r
+ 0642 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ ; Select which DAC Register to read in\r
+ \r
+ OUT_8 DAC_READ_ADDR, [BP].GDR_Register\r
+ 0644 BA 03C7 1 MOV DX, DAC_READ_ADDR ; then Select Register\r
+ 0647 8A 46 0C 1 MOV AL, [BP].GDR_Register ; then Get Data Value\r
+ 064A EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 064B BA 03C9 MOV DX, PEL_DATA_REG ; Dac Data Register\r
+ CLR AX ; Clear AX\r
+ 064E 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ \r
+ 0650 EC IN AL, DX ; Read Red Value\r
+ 0651 8B 5E 0A MOV BX, [BP].GDR_Red ; Get Address of Red%\r
+ 0654 89 07 MOV [BX], AX ; *Red% = AX\r
+ \r
+ 0656 EC IN AL, DX ; Read Green Value\r
+ 0657 8B 5E 08 MOV BX, [BP].GDR_Green ; Get Address of Green%\r
+ 065A 89 07 MOV [BX], AX ; *Green% = AX\r
+ \r
+ 065C EC IN AL, DX ; Read Blue Value\r
+ 065D 8B 5E 06 MOV BX, [BP].GDR_Blue ; Get Address of Blue%\r
+ 0660 89 07 MOV [BX], AX ; *Blue% = AX\r
+ \r
+ 0662 5D POP BP ; Restore Registers\r
+ 0663 CA 0008 RET 8 ; Exit & Clean Up Stack\r
+ \r
+ 0666 GET_DAC_REGISTER ENDP\r
+ \r
+ \r
+ ;===========================================================\r
+ ;LOAD_DAC_REGISTERS (SEG PalData, StartReg%, EndReg%, Sync%)\r
+ ;===========================================================\r
+ ;\r
+ ; Sets a Block of Vga Palette Registers\r
+ ;\r
+ ; ENTRY: PalData = Far Pointer to Block of palette data\r
+ ; StartReg = First Register # in range to set (0-255)\r
+ ; EndReg = Last Register # in Range to set (0-255)\r
+ ; Sync = Wait for Vertical Retrace Flag (Boolean)\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ ; NOTES: PalData is a linear array of 3 byte Palette values\r
+ ; in the order: Red (0-63), Green (0-63), Blue (0-63)\r
+ ;\r
+ \r
+ 0014 LDR_STACK STRUC\r
+ 0000 0000 0000 0000 DW ?x3 ; BP, DS, SI\r
+ 0006 00000000 DD ? ; Caller\r
+ 000A 0000 LDR_Sync DW ? ; Vertical Sync Flag\r
+ 000C 00 00 LDR_EndReg DB ?,? ; Last Register #\r
+ 000E 00 00 LDR_StartReg DB ?,? ; First Register #\r
+ 0010 00000000 LDR_PalData DD ? ; Far Ptr to Palette Data\r
+ LDR_STACK ENDS\r
+ \r
+ PUBLIC LOAD_DAC_REGISTERS\r
+ \r
+ 0666 LOAD_DAC_REGISTERS PROC FAR\r
+ \r
+ PUSHx BP, DS, SI ; Save Registers\r
+ 0666 55 1 PUSH BP ; Save R1\r
+ 0667 1E 2 PUSH DS ; Save R1\r
+ 0668 56 3 PUSH SI ; Save R1\r
+ 0669 8B EC mov BP, SP ; Set up Stack Frame\r
+ \r
+ 066B 8B 46 0A mov AX, [BP].LDR_Sync ; Get Vertical Sync Flag\r
+ 066E 0B C0 or AX, AX ; is Sync Flag = 0?\r
+ 0670 74 05 jz @LDR_Load ; if so, skip call\r
+ \r
+ 0672 9A ---- 0795 R call f SYNC_DISPLAY ; wait for vsync\r
+ \r
+ ; Determine register #'s, size to copy, etc\r
+ \r
+ 0677 @LDR_Load:\r
+ \r
+ 0677 C5 76 10 lds SI, [BP].LDR_PalData ; DS:SI -> Palette Data\r
+ 067A BA 03C8 mov DX, DAC_WRITE_ADDR ; DAC register # selector\r
+ \r
+ CLR AX, BX ; Clear for byte loads\r
+ 067D 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 067F 33 DB 2 XOR BX, BX ; Set Register = 0\r
+ 0681 8A 46 0E mov AL, [BP].LDR_StartReg ; Get Start Register\r
+ 0684 8A 5E 0C mov BL, [BP].LDR_EndReg ; Get End Register\r
+ \r
+ 0687 2B D8 sub BX, AX ; BX = # of DAC registers -1\r
+ 0689 43 inc BX ; BX = # of DAC registers\r
+ 068A 8B CB mov CX, BX ; CX = # of DAC registers\r
+ 068C 03 CB add CX, BX ; CX = " " * 2\r
+ 068E 03 CB add CX, BX ; CX = " " * 3\r
+ 0690 FC cld ; Block OUTs forward\r
+ 0691 EE out DX, AL ; set up correct register #\r
+ \r
+ ; Load a block of DAC Registers\r
+ \r
+ 0692 BA 03C9 mov DX, PEL_DATA_REG ; Dac Data Register\r
+ \r
+ 0695 F3/ 6E rep outsb ; block set DAC registers\r
+ \r
+ POPx SI, DS, BP ; Restore Registers\r
+ 0697 5E 1 POP SI ; Restore R1\r
+ 0698 1F 2 POP DS ; Restore R1\r
+ 0699 5D 3 POP BP ; Restore R1\r
+ 069A CA 000A ret 10 ; Exit & Clean Up Stack\r
+ \r
+ 069D LOAD_DAC_REGISTERS ENDP\r
+ \r
+ \r
+ ;====================================================\r
+ ;READ_DAC_REGISTERS (SEG PalData, StartReg%, EndReg%)\r
+ ;====================================================\r
+ ;\r
+ ; Reads a Block of Vga Palette Registers\r
+ ;\r
+ ; ENTRY: PalData = Far Pointer to block to store palette data\r
+ ; StartReg = First Register # in range to read (0-255)\r
+ ; EndReg = Last Register # in Range to read (0-255)\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ ; NOTES: PalData is a linear array of 3 byte Palette values\r
+ ; in the order: Red (0-63), Green (0-63), Blue (0-63)\r
+ ;\r
+ \r
+ 0012 RDR_STACK STRUC\r
+ 0000 0000 0000 0000 DW ?x3 ; BP, ES, DI\r
+ 0006 00000000 DD ? ; Caller\r
+ 000A 00 00 RDR_EndReg DB ?,? ; Last Register #\r
+ 000C 00 00 RDR_StartReg DB ?,? ; First Register #\r
+ 000E 00000000 RDR_PalData DD ? ; Far Ptr to Palette Data\r
+ RDR_STACK ENDS\r
+ \r
+ PUBLIC READ_DAC_REGISTERS\r
+ \r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 8 - 1\r
+\r
+\r
+ 069D READ_DAC_REGISTERS PROC FAR\r
+ \r
+ PUSHx BP, ES, DI ; Save Registers\r
+ 069D 55 1 PUSH BP ; Save R1\r
+ 069E 06 2 PUSH ES ; Save R1\r
+ 069F 57 3 PUSH DI ; Save R1\r
+ 06A0 8B EC mov BP, SP ; Set up Stack Frame\r
+ \r
+ ; Determine register #'s, size to copy, etc\r
+ \r
+ 06A2 C4 7E 0E les DI, [BP].RDR_PalData ; ES:DI -> Palette Buffer\r
+ 06A5 BA 03C7 mov DX, DAC_READ_ADDR ; DAC register # selector\r
+ \r
+ CLR AX, BX ; Clear for byte loads\r
+ 06A8 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 06AA 33 DB 2 XOR BX, BX ; Set Register = 0\r
+ 06AC 8A 46 0C mov AL, [BP].RDR_StartReg ; Get Start Register\r
+ 06AF 8A 5E 0A mov BL, [BP].RDR_EndReg ; Get End Register\r
+ \r
+ 06B2 2B D8 sub BX, AX ; BX = # of DAC registers -1\r
+ 06B4 43 inc BX ; BX = # of DAC registers\r
+ 06B5 8B CB mov CX, BX ; CX = # of DAC registers\r
+ 06B7 03 CB add CX, BX ; CX = " " * 2\r
+ 06B9 03 CB add CX, BX ; CX = " " * 3\r
+ 06BB FC cld ; Block INs forward\r
+ \r
+ ; Read a block of DAC Registers\r
+ \r
+ 06BC EE out DX, AL ; set up correct register #\r
+ 06BD BA 03C9 mov DX, PEL_DATA_REG ; Dac Data Register\r
+ \r
+ 06C0 F3/ 6C rep insb ; block read DAC registers\r
+ \r
+ POPx DI, ES, BP ; Restore Registers\r
+\r
+ 06C2 5F 1 POP DI ; Restore R1\r
+ 06C3 07 2 POP ES ; Restore R1\r
+ 06C4 5D 3 POP BP ; Restore R1\r
+ 06C5 CA 0008 ret 8 ; Exit & Clean Up Stack\r
+ \r
+ 06C8 READ_DAC_REGISTERS ENDP\r
+ \r
+ \r
+ ; ===== PAGE FLIPPING AND SCROLLING ROUTINES =====\r
+ \r
+ ;=========================\r
+ ;SET_ACTIVE_PAGE (PageNo%)\r
+ ;=========================\r
+ ;\r
+ ; Sets the active display Page to be used for future drawing\r
+ ;\r
+ ; ENTRY: PageNo = Display Page to make active\r
+ ; (values: 0 to Number of Pages - 1)\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 0008 SAP_STACK STRUC\r
+ 0000 0000 DW ? ; BP\r
+ 0002 00000000 DD ? ; Caller\r
+ 0006 0000 SAP_Page DW ? ; Page # for Drawing\r
+ SAP_STACK ENDS\r
+ \r
+ PUBLIC SET_ACTIVE_PAGE\r
+ \r
+ 06C8 SET_ACTIVE_PAGE PROC FAR\r
+ \r
+ 06C8 55 PUSH BP ; Preserve Registers\r
+ 06C9 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 06CB 8B 5E 06 MOV BX, [BP].SAP_Page ; Get Desired Page #\r
+ 06CE 3B 1E 0004 R CMP BX, LAST_PAGE ; Is Page # Valid?\r
+ 06D2 73 0D JAE @SAP_Exit ; IF Not, Do Nothing\r
+ \r
+ 06D4 89 1E 0012 R MOV ACTIVE_PAGE, BX ; Set Active Page #\r
+ \r
+ 06D8 D1 E3 SHL BX, 1 ; Scale Page # to Word\r
+ 06DA 8B 87 0006 R MOV AX, PAGE_ADDR[BX] ; Get offset to Page\r
+ \r
+ 06DE A3 0014 R MOV CURRENT_PAGE, AX ; And set for future LES's\r
+ \r
+ 06E1 @SAP_Exit:\r
+ 06E1 5D POP BP ; Restore Registers\r
+ 06E2 CA 0002 RET 2 ; Exit and Clean up Stack\r
+ \r
+ 06E5 SET_ACTIVE_PAGE ENDP\r
+ \r
+ \r
+ ;================\r
+ ;GET_ACTIVE_PAGE%\r
+ ;================\r
+ ;\r
+ ; Returns the Video Page # currently used for Drawing\r
+ ;\r
+ ; ENTRY: No Parameters are passed\r
+ ;\r
+ ; EXIT: AX = Current Video Page used for Drawing\r
+ ;\r
+ \r
+ PUBLIC GET_ACTIVE_PAGE\r
+ \r
+ 06E5 GET_ACTIVE_PAGE PROC FAR\r
+ \r
+ 06E5 A1 0012 R MOV AX, ACTIVE_PAGE ; Get Active Page #\r
+ 06E8 CB RET ; Exit and Clean up Stack\r
+ \r
+ 06E9 GET_ACTIVE_PAGE ENDP\r
+ \r
+ \r
+ ;===============================\r
+ ;SET_DISPLAY_PAGE (DisplayPage%)\r
+ ;===============================\r
+ ;\r
+ ; Sets the currently visible display page.\r
+ ; When called this routine syncronizes the display\r
+ ; to the vertical blank.\r
+ ;\r
+ ; ENTRY: PageNo = Display Page to show on the screen\r
+ ; (values: 0 to Number of Pages - 1)\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 0008 SDP_STACK STRUC\r
+ 0000 0000 DW ? ; BP\r
+ 0002 00000000 DD ? ; Caller\r
+ 0006 0000 SDP_Page DW ? ; Page # to Display...\r
+ SDP_STACK ENDS\r
+ \r
+ PUBLIC SET_DISPLAY_PAGE\r
+ \r
+ 06E9 SET_DISPLAY_PAGE PROC FAR\r
+ \r
+ 06E9 55 PUSH BP ; Preserve Registers\r
+ 06EA 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 06EC 8B 5E 06 MOV BX, [BP].SDP_Page ; Get Desired Page #\r
+ 06EF 3B 1E 0004 R CMP BX, LAST_PAGE ; Is Page # Valid?\r
+ 06F3 73 2B JAE @SDP_Exit ; IF Not, Do Nothing\r
+ \r
+ 06F5 89 1E 0010 R MOV DISPLAY_PAGE, BX ; Set Display Page #\r
+ \r
+ 06F9 D1 E3 SHL BX, 1 ; Scale Page # to Word\r
+ 06FB 8B 8F 0006 R MOV CX, PAGE_ADDR[BX] ; Get offset in memory to Page\r
+ 06FF 03 0E 001C R ADD CX, CURRENT_MOFFSET ; Adjust for any scrolling\r
+ \r
+ ; Wait if we are currently in a Vertical Retrace\r
+ \r
+ 0703 BA 03DA MOV DX, INPUT_1 ; Input Status #1 Register\r
+ \r
+ 0706 @DP_WAIT0:\r
+ 0706 EC IN AL, DX ; Get VGA status\r
+ 0707 24 08 AND AL, VERT_RETRACE ; In Display mode yet?\r
+ 0709 75 FB JNZ @DP_WAIT0 ; If Not, wait for it\r
+ \r
+ ; Set the Start Display Address to the new page\r
+ \r
+ 070B BA 03D4 MOV DX, CRTC_Index ; We Change the VGA Sequencer\r
+ \r
+ 070E B0 0D MOV AL, START_DISP_LO ; Display Start Low Register\r
+ 0710 8A E1 MOV AH, CL ; Low 8 Bits of Start Addr\r
+ 0712 EF OUT DX, AX ; Set Display Addr Low\r
+ \r
+ 0713 B0 0C MOV AL, START_DISP_HI ; Display Start High Register\r
+ 0715 8A E5 MOV AH, CH ; High 8 Bits of Start Addr\r
+ 0717 EF OUT DX, AX ; Set Display Addr High\r
+ \r
+ ; Wait for a Vertical Retrace to smooth out things\r
+ \r
+ 0718 BA 03DA MOV DX, INPUT_1 ; Input Status #1 Register\r
+ \r
+ 071B @DP_WAIT1:\r
+ 071B EC IN AL, DX ; Get VGA status\r
+ 071C 24 08 AND AL, VERT_RETRACE ; Vertical Retrace Start?\r
+ 071E 74 FB JZ @DP_WAIT1 ; If Not, wait for it\r
+ \r
+ ; Now Set Display Starting Address\r
+ \r
+ \r
+ 0720 @SDP_Exit:\r
+ 0720 5D POP BP ; Restore Registers\r
+ 0721 CA 0002 RET 2 ; Exit and Clean up Stack\r
+ \r
+ 0724 SET_DISPLAY_PAGE ENDP\r
+ \r
+ \r
+ ;=================\r
+ ;GET_DISPLAY_PAGE%\r
+ ;=================\r
+ ;\r
+ ; Returns the Video Page # currently displayed\r
+ ;\r
+ ; ENTRY: No Parameters are passed\r
+ ;\r
+ ; EXIT: AX = Current Video Page being displayed\r
+ ;\r
+ \r
+ PUBLIC GET_DISPLAY_PAGE\r
+ \r
+ 0724 GET_DISPLAY_PAGE PROC FAR\r
+ \r
+ 0724 A1 0010 R MOV AX, DISPLAY_PAGE ; Get Display Page #\r
+ 0727 CB RET ; Exit & Clean Up Stack\r
+ \r
+ 0728 GET_DISPLAY_PAGE ENDP\r
+ \r
+ \r
+ ;=======================================\r
+ ;SET_WINDOW (DisplayPage%, Xpos%, Ypos%)\r
+ ;=======================================\r
+ ;\r
+ ; Since a Logical Screen can be larger than the Physical\r
+ ; Screen, Scrolling is possible. This routine sets the\r
+ ; Upper Left Corner of the Screen to the specified Pixel.\r
+ ; Also Sets the Display page to simplify combined page\r
+ ; flipping and scrolling. When called this routine\r
+ ; syncronizes the display to the vertical blank.\r
+ ;\r
+ ; ENTRY: DisplayPage = Display Page to show on the screen\r
+ ; Xpos = # of pixels to shift screen right\r
+ ; Ypos = # of lines to shift screen down\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 000C SW_STACK STRUC\r
+ 0000 0000 DW ? ; BP\r
+ 0002 00000000 DD ? ; Caller\r
+ 0006 0000 SW_Ypos DW ? ; Y pos of UL Screen Corner\r
+ 0008 0000 SW_Xpos DW ? ; X pos of UL Screen Corner\r
+ 000A 0000 SW_Page DW ? ; (new) Display Page\r
+ SW_STACK ENDS\r
+ \r
+ PUBLIC SET_WINDOW\r
+ \r
+ 0728 SET_WINDOW PROC FAR\r
+ \r
+ 0728 55 PUSH BP ; Preserve Registers\r
+ 0729 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ ; Check if our Scroll Offsets are Valid\r
+ \r
+ 072B 8B 5E 0A MOV BX, [BP].SW_Page ; Get Desired Page #\r
+ 072E 3B 1E 0004 R CMP BX, LAST_PAGE ; Is Page # Valid?\r
+ 0732 73 55 JAE @SW_Exit ; IF Not, Do Nothing\r
+ \r
+ 0734 8B 46 06 MOV AX, [BP].SW_Ypos ; Get Desired Y Offset\r
+ 0737 3B 06 0020 R CMP AX, MAX_YOFFSET ; Is it Within Limits?\r
+ 073B 77 4C JA @SW_Exit ; if not, exit\r
+ \r
+ 073D 8B 4E 08 MOV CX, [BP].SW_Xpos ; Get Desired X Offset\r
+ 0740 3B 0E 001E R CMP CX, MAX_XOFFSET ; Is it Within Limits?\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 9 - 1\r
+\r
+\r
+ 0744 77 43 JA @SW_Exit ; if not, exit\r
+ \r
+ ; Compute proper Display start address to use\r
+ \r
+ 0746 F7 26 0000 R MUL SCREEN_WIDTH ; AX = YOffset * Line Width\r
+ 074A C1 E9 02 SHR CX, 2 ; CX / 4 = Bytes into Line\r
+ 074D 03 C1 ADD AX, CX ; AX = Offset of Upper Left Pixel\r
+ \r
+ 074F A3 001C R MOV CURRENT_MOFFSET, AX ; Save Offset Info\r
+ \r
+ 0752 89 1E 0010 R MOV DISPLAY_PAGE, BX ; Set Current Page #\r
+ 0756 D1 E3 SHL BX, 1 ; Scale Page # to Word\r
+ 0758 03 87 0006 R ADD AX, PAGE_ADDR[BX] ; Get offset in VGA to Page\r
+ 075C 8B D8 MOV BX, AX ; BX = Desired Display Start\r
+ \r
+ 075E BA 03DA MOV DX, INPUT_1 ; Input Status #1 Register\r
+ \r
+ ; Wait if we are currently in a Vertical Retrace\r
+ \r
+ 0761 @SW_WAIT0:\r
+ 0761 EC IN AL, DX ; Get VGA status\r
+ 0762 24 08 AND AL, VERT_RETRACE ; In Display mode yet?\r
+ 0764 75 FB JNZ @SW_WAIT0 ; If Not, wait for it\r
+ \r
+ ; Set the Start Display Address to the new window\r
+ \r
+ 0766 BA 03D4 MOV DX, CRTC_Index ; We Change the VGA Sequencer\r
+ 0769 B0 0D MOV AL, START_DISP_LO ; Display Start Low Register\r
+ 076B 8A E3 MOV AH, BL ; Low 8 Bits of Start Addr\r
+ 076D EF OUT DX, AX ; Set Display Addr Low\r
+ \r
+ 076E B0 0C MOV AL, START_DISP_HI ; Display Start High Register\r
+ 0770 8A E7 MOV AH, BH ; High 8 Bits of Start Addr\r
+ 0772 EF OUT DX, AX ; Set Display Addr High\r
+ \r
+ ; Wait for a Vertical Retrace to smooth out things\r
+ \r
+ 0773 BA 03DA MOV DX, INPUT_1 ; Input Status #1 Register\r
+ \r
+ 0776 @SW_WAIT1:\r
+ 0776 EC IN AL, DX ; Get VGA status\r
+ 0777 24 08 AND AL, VERT_RETRACE ; Vertical Retrace Start?\r
+ 0779 74 FB JZ @SW_WAIT1 ; If Not, wait for it\r
+ \r
+ ; Now Set the Horizontal Pixel Pan values\r
+ \r
+ OUT_8 ATTRIB_Ctrl, PIXEL_PAN_REG ; Select Pixel Pan Register\r
+ 077B BA 03C0 1 MOV DX, ATTRIB_Ctrl ; then Select Register\r
+ 077E B0 33 1 MOV AL, PIXEL_PAN_REG ; then Get Data Value\r
+ 0780 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0781 8B 46 08 MOV AX, [BP].SW_Xpos ; Get Desired X Offset\r
+ 0784 24 03 AND AL, 03 ; Get # of Pixels to Pan (0-3)\r
+ 0786 D0 E0 SHL AL, 1 ; Shift for 256 Color Mode\r
+ 0788 EE OUT DX, AL ; Fine tune the display!\r
+ \r
+ 0789 @SW_Exit:\r
+ 0789 5D POP BP ; Restore Saved Registers\r
+ 078A CA 0006 RET 6 ; Exit and Clean up Stack\r
+ \r
+ 078D SET_WINDOW ENDP\r
+ \r
+ \r
+ ;=============\r
+ ;GET_X_OFFSET%\r
+ ;=============\r
+ ;\r
+ ; Returns the X coordinate of the Pixel currently display\r
+ ; in the upper left corner of the display\r
+ ;\r
+ ; ENTRY: No Parameters are passed\r
+ ;\r
+ ; EXIT: AX = Current Horizontal Scroll Offset\r
+ ;\r
+ \r
+ PUBLIC GET_X_OFFSET\r
+ \r
+ 078D GET_X_OFFSET PROC FAR\r
+ \r
+ 078D A1 0018 R MOV AX, CURRENT_XOFFSET ; Get current horz offset\r
+ 0790 CB RET ; Exit & Clean Up Stack\r
+ \r
+ 0791 GET_X_OFFSET ENDP\r
+ \r
+ \r
+ ;=============\r
+ ;GET_Y_OFFSET%\r
+ ;=============\r
+ ;\r
+ ; Returns the Y coordinate of the Pixel currently display\r
+ ; in the upper left corner of the display\r
+ ;\r
+ ; ENTRY: No Parameters are passed\r
+ ;\r
+ ; EXIT: AX = Current Vertical Scroll Offset\r
+ ;\r
+ \r
+ PUBLIC GET_Y_OFFSET\r
+ \r
+ 0791 GET_Y_OFFSET PROC FAR\r
+ \r
+ 0791 A1 001A R MOV AX, CURRENT_YOFFSET ; Get current vertical offset\r
+ 0794 CB RET ; Exit & Clean Up Stack\r
+ \r
+ 0795 GET_Y_OFFSET ENDP\r
+ \r
+ \r
+ ;============\r
+ ;SYNC_DISPLAY\r
+ ;============\r
+ ;\r
+ ; Pauses the computer until the next Vertical Retrace starts\r
+ ;\r
+ ; ENTRY: No Parameters are passed\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ PUBLIC SYNC_DISPLAY\r
+ \r
+ 0795 SYNC_DISPLAY PROC FAR\r
+ \r
+ 0795 BA 03DA MOV DX, INPUT_1 ; Input Status #1 Register\r
+ \r
+ ; Wait for any current retrace to end\r
+ \r
+ 0798 @SD_WAIT0:\r
+ 0798 EC IN AL, DX ; Get VGA status\r
+ 0799 24 08 AND AL, VERT_RETRACE ; In Display mode yet?\r
+ 079B 75 FB JNZ @SD_WAIT0 ; If Not, wait for it\r
+ \r
+ ; Wait for the start of the next vertical retrace\r
+ \r
+ 079D @SD_WAIT1:\r
+ 079D EC IN AL, DX ; Get VGA status\r
+ 079E 24 08 AND AL, VERT_RETRACE ; Vertical Retrace Start?\r
+ 07A0 74 FB JZ @SD_WAIT1 ; If Not, wait for it\r
+ \r
+ 07A2 CB RET ; Exit & Clean Up Stack\r
+ \r
+ 07A3 SYNC_DISPLAY ENDP\r
+ \r
+ \r
+ ; ===== TEXT DISPLAY ROUTINES =====\r
+ \r
+ ;==================================================\r
+ ;GPRINTC (CharNum%, Xpos%, Ypos%, ColorF%, ColorB%)\r
+ ;==================================================\r
+ ;\r
+ ; Draws an ASCII Text Character using the currently selected\r
+ ; 8x8 font on the active display page. It would be a simple\r
+ ; exercise to make this routine process variable height fonts.\r
+ ;\r
+ ; ENTRY: CharNum = ASCII character # to draw\r
+ ; Xpos = X position to draw Character at\r
+ ; Ypos = Y position of to draw Character at\r
+ ; ColorF = Color to draw text character in\r
+ ; ColorB = Color to set background to\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 001E GPC_STACK STRUC\r
+ 0000 0000 GPC_Width DW ? ; Screen Width-1\r
+ 0002 00 00 GPC_Lines DB ?,? ; Scan lines to Decode\r
+ 0004 0000 GPC_T_SETS DW ? ; Saved Charset Segment\r
+ 0006 0000 GPC_T_SETO DW ? ; Saved Charset Offset\r
+ 0008 0000 0000 0000 DW ?x4 ; DI, SI, DS, BP\r
+ 0000\r
+ 0010 00000000 DD ? ; Caller\r
+ 0014 00 00 GPC_ColorB DB ?,? ; Background Color\r
+ 0016 00 00 GPC_ColorF DB ?,? ; Text Color\r
+ 0018 0000 GPC_Ypos DW ? ; Y Position to Print at\r
+ 001A 0000 GPC_Xpos DW ? ; X position to Print at\r
+ 001C 00 00 GPC_Char DB ?,? ; Character to Print\r
+ GPC_STACK ENDS\r
+ \r
+ PUBLIC GPRINTC\r
+ \r
+ 07A3 GPRINTC PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 07A3 55 1 PUSH BP ; Save R1\r
+ 07A4 1E 2 PUSH DS ; Save R1\r
+ 07A5 56 3 PUSH SI ; Save R1\r
+ 07A6 57 4 PUSH DI ; Save R1\r
+ 07A7 83 EC 08 SUB SP, 8 ; Allocate WorkSpace on Stack\r
+ 07AA 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 07AC C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ \r
+ 07B0 A1 0000 R MOV AX, SCREEN_WIDTH ; Get Logical Line Width\r
+ 07B3 8B D8 MOV BX, AX ; BX = Screen Width\r
+ 07B5 4B DEC BX ; = Screen Width-1\r
+ 07B6 89 5E 00 MOV [BP].GPC_Width, BX ; Save for later use\r
+ \r
+ 07B9 F7 66 18 MUL [BP].GPC_Ypos ; Start of Line = Ypos * Width\r
+ 07BC 03 F8 ADD DI, AX ; DI -> Start of Line Ypos\r
+ \r
+ 07BE 8B 46 1A MOV AX, [BP].GPC_Xpos ; Get Xpos of Character\r
+ 07C1 8B C8 MOV CX, AX ; Save Copy of Xpos\r
+ 07C3 C1 E8 02 SHR AX, 2 ; Bytes into Line = Xpos/4\r
+ 07C6 03 F8 ADD DI, AX ; DI -> (Xpos, Ypos)\r
+ \r
+ ;Get Source ADDR of Character Bit Map & Save\r
+ \r
+ 07C8 8A 46 1C MOV AL, [BP].GPC_Char ; Get Character #\r
+ 07CB A8 80 TEST AL, 080h ; Is Hi Bit Set?\r
+ 07CD 74 0C JZ @GPC_LowChar ; Nope, use low char set ptr\r
+ \r
+ 07CF 24 7F AND AL, 07Fh ; Mask Out Hi Bit\r
+ 07D1 8B 1E 0026 R MOV BX, CHARSET_HI ; BX = Char Set Ptr:Offset\r
+ 07D5 8B 16 0028 R MOV DX, CHARSET_HI+2 ; DX = Char Set Ptr:Segment\r
+ 07D9 EB 08 JMP s @GPC_Set_Char ; Go Setup Character Ptr\r
+ \r
+ 07DB @GPC_LowChar:\r
+ \r
+ 07DB 8B 1E 0022 R MOV BX, CHARSET_LOW ; BX = Char Set Ptr:Offset\r
+ 07DF 8B 16 0024 R MOV DX, CHARSET_LOW+2 ; DX = Char Set Ptr:Segment\r
+ \r
+ 07E3 @GPC_Set_Char:\r
+ 07E3 89 56 04 MOV [BP].GPC_T_SETS, DX ; Save Segment on Stack\r
+ \r
+ 07E6 B4 00 MOV AH, 0 ; Valid #'s are 0..127\r
+ 07E8 C1 E0 03 SHL AX, 3 ; * 8 Bytes Per Bitmap\r
+ 07EB 03 D8 ADD BX, AX ; BX = Offset of Selected char\r
+ 07ED 89 5E 06 MOV [BP].GPC_T_SETO, BX ; Save Offset on Stack\r
+ \r
+ 07F0 83 E1 03 AND CX, PLANE_BITS ; Get Plane #\r
+ 07F3 B5 0F MOV CH, ALL_PLANES ; Get Initial Plane mask\r
+ 07F5 D2 E5 SHL CH, CL ; And shift into position\r
+ 07F7 80 E5 0F AND CH, ALL_PLANES ; And mask to lower nibble\r
+ \r
+ 07FA B0 04 MOV AL, 04 ; 4-Plane # = # of initial\r
+ 07FC 2A C1 SUB AL, CL ; shifts to align bit mask\r
+ 07FE 8A C8 MOV CL, AL ; Shift Count for SHL\r
+ \r
+ ;Get segment of character map\r
+ \r
+ OUT_8 SC_Index, MAP_MASK ; Setup Plane selections\r
+ 0800 BA 03C4 1 MOV DX, SC_Index ; then Select Register\r
+ 0803 B0 02 1 MOV AL, MAP_MASK ; then Get Data Value\r
+ 0805 EE 1 OUT DX, AL ; Set I/O Register\r
+ 0806 42 INC DX ; DX -> SC_Data\r
+ \r
+ 0807 B0 08 MOV AL, 08 ; 8 Lines to Process\r
+ 0809 88 46 02 MOV [BP].GPC_Lines, AL ; Save on Stack\r
+ \r
+ 080C 8E 5E 04 MOV DS, [BP].GPC_T_SETS ; Point to character set\r
+ \r
+ 080F @GPC_DECODE_CHAR_BYTE:\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 10 - 1\r
+\r
+\r
+ \r
+ 080F 8B 76 06 MOV SI, [BP].GPC_T_SETO ; Get DS:SI = String\r
+ \r
+ 0812 8A 3C MOV BH, [SI] ; Get Bit Map\r
+ 0814 46 INC SI ; Point to Next Line\r
+ 0815 89 76 06 MOV [BP].GPC_T_SETO, SI ; And save new Pointer...\r
+ \r
+ CLR AX ; Clear AX\r
+ 0818 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ \r
+ CLR BL ; Clear BL\r
+ 081A 32 DB 1 XOR BL, BL ; Set Register = 0\r
+ 081C D3 C3 ROL BX, CL ; BL holds left edge bits\r
+ 081E 8B F3 MOV SI, BX ; Use as Table Index\r
+ 0820 83 E6 0F AND SI, CHAR_BITS ; Get Low Bits\r
+ 0823 2E: 8A 84 0008 R MOV AL, Char_Plane_Data[SI] ; Get Mask in AL\r
+ 0828 74 07 JZ @GPC_NO_LEFT1BITS ; Skip if No Pixels to set\r
+ \r
+ 082A 8A 66 16 MOV AH, [BP].GPC_ColorF ; Get Foreground Color\r
+ 082D EE OUT DX, AL ; Set up Screen Mask\r
+ 082E 26: 88 25 MOV ES:[DI], AH ; Write Foreground color\r
+ \r
+ 0831 @GPC_NO_LEFT1BITS:\r
+ 0831 32 C5 XOR AL, CH ; Invert mask for Background\r
+ 0833 74 07 JZ @GPC_NO_LEFT0BITS ; Hey, no need for this\r
+ \r
+ 0835 8A 66 14 MOV AH, [BP].GPC_ColorB ; Get background Color\r
+ 0838 EE OUT DX, AL ; Set up Screen Mask\r
+ 0839 26: 88 25 MOV ES:[DI], AH ; Write Foreground color\r
+ \r
+ ;Now Do Middle/Last Band\r
+ \r
+ 083C @GPC_NO_LEFT0BITS:\r
+ 083C 47 INC DI ; Point to next Byte\r
+ 083D C1 C3 04 ROL BX, 4 ; Shift 4 bits\r
+ \r
+ 0840 8B F3 MOV SI, BX ; Make Lookup Pointer\r
+ 0842 83 E6 0F AND SI, CHAR_BITS ; Get Low Bits\r
+ 0845 2E: 8A 84 0008 R MOV AL, Char_Plane_Data[SI] ; Get Mask in AL\r
+ 084A 74 07 JZ @GPC_NO_MIDDLE1BITS ; Skip if no pixels to set\r
+ \r
+ 084C 8A 66 16 MOV AH, [BP].GPC_ColorF ; Get Foreground Color\r
+ 084F EE OUT DX, AL ; Set up Screen Mask\r
+ 0850 26: 88 25 MOV ES:[DI], AH ; Write Foreground color\r
+ \r
+ 0853 @GPC_NO_MIDDLE1BITS:\r
+ 0853 34 0F XOR AL, ALL_PLANES ; Invert mask for Background\r
+ 0855 74 07 JZ @GPC_NO_MIDDLE0BITS ; Hey, no need for this\r
+ \r
+ 0857 8A 66 14 MOV AH, [BP].GPC_ColorB ; Get background Color\r
+ 085A EE OUT DX, AL ; Set up Screen Mask\r
+ 085B 26: 88 25 MOV ES:[DI], AH ; Write Foreground color\r
+ \r
+ 085E @GPC_NO_MIDDLE0BITS:\r
+ 085E 80 F5 0F XOR CH, ALL_PLANES ; Invert Clip Mask\r
+ 0861 80 F9 04 CMP CL, 4 ; Aligned by 4?\r
+ 0864 74 23 JZ @GPC_NEXT_LINE ; If so, Exit now..\r
+ \r
+ 0866 47 INC DI ; Point to next Byte\r
+ 0867 C1 C3 04 ROL BX, 4 ; Shift 4 bits\r
+ \r
+ 086A 8B F3 MOV SI, BX ; Make Lookup Pointer\r
+ 086C 83 E6 0F AND SI, CHAR_BITS ; Get Low Bits\r
+ 086F 2E: 8A 84 0008 R MOV AL, Char_Plane_Data[SI] ; Get Mask in AL\r
+ 0874 74 07 JZ @GPC_NO_RIGHT1BITS ; Skip if No Pixels to set\r
+ \r
+ 0876 8A 66 16 MOV AH, [BP].GPC_ColorF ; Get Foreground Color\r
+ 0879 EE OUT DX, AL ; Set up Screen Mask\r
+ 087A 26: 88 25 MOV ES:[DI], AH ; Write Foreground color\r
+ \r
+ 087D @GPC_NO_RIGHT1BITS:\r
+ \r
+ 087D 32 C5 XOR AL, CH ; Invert mask for Background\r
+ 087F 74 07 JZ @GPC_NO_RIGHT0BITS ; Hey, no need for this\r
+ \r
+ 0881 8A 66 14 MOV AH, [BP].GPC_ColorB ; Get background Color\r
+ 0884 EE OUT DX, AL ; Set up Screen Mask\r
+ 0885 26: 88 25 MOV ES:[DI], AH ; Write Foreground color\r
+ \r
+ 0888 @GPC_NO_RIGHT0BITS:\r
+ 0888 4F DEC DI ; Adjust for Next Line Advance\r
+ \r
+ 0889 @GPC_NEXT_LINE:\r
+ 0889 03 7E 00 ADD DI, [BP].GPC_Width ; Point to Next Line\r
+ 088C 80 F5 0F XOR CH, CHAR_BITS ; Flip the Clip mask back\r
+ \r
+ 088F FE 4E 02 DEC [BP].GPC_Lines ; Count Down Lines\r
+ 0892 74 03 JZ @GPC_EXIT ; Ok... Done!\r
+ \r
+ 0894 E9 FF78 JMP @GPC_DECODE_CHAR_BYTE ; Again! Hey!\r
+ \r
+ 0897 @GPC_EXIT:\r
+ 0897 83 C4 08 ADD SP, 08 ; Deallocate stack workspace\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 089A 5F 1 POP DI ; Restore R1\r
+ 089B 5E 2 POP SI ; Restore R1\r
+ 089C 1F 3 POP DS ; Restore R1\r
+ 089D 5D 4 POP BP ; Restore R1\r
+ 089E CA 000A RET 10 ; Exit and Clean up Stack\r
+ \r
+ 08A1 GPRINTC ENDP\r
+ \r
+ \r
+ ;==========================================\r
+ ;TGPRINTC (CharNum%, Xpos%, Ypos%, ColorF%)\r
+ ;==========================================\r
+ ;\r
+ ; Transparently draws an ASCII Text Character using the\r
+ ; currently selected 8x8 font on the active display page.\r
+ ;\r
+ ; ENTRY: CharNum = ASCII character # to draw\r
+ ; Xpos = X position to draw Character at\r
+ ; Ypos = Y position of to draw Character at\r
+ ; ColorF = Color to draw text character in\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 001C TGP_STACK STRUC\r
+ 0000 0000 TGP_Width DW ? ; Screen Width-1\r
+ 0002 00 00 TGP_Lines DB ?,? ; Scan lines to Decode\r
+ 0004 0000 TGP_T_SETS DW ? ; Saved Charset Segment\r
+ 0006 0000 TGP_T_SETO DW ? ; Saved Charset Offset\r
+ 0008 0000 0000 0000 DW ?x4 ; DI, SI, DS, BP\r
+ 0000\r
+ 0010 00000000 DD ? ; Caller\r
+ 0014 00 00 TGP_ColorF DB ?,? ; Text Color\r
+ 0016 0000 TGP_Ypos DW ? ; Y Position to Print at\r
+ 0018 0000 TGP_Xpos DW ? ; X position to Print at\r
+ 001A 00 00 TGP_Char DB ?,? ; Character to Print\r
+ TGP_STACK ENDS\r
+ \r
+ PUBLIC TGPRINTC\r
+ \r
+ 08A1 TGPRINTC PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 08A1 55 1 PUSH BP ; Save R1\r
+ 08A2 1E 2 PUSH DS ; Save R1\r
+ 08A3 56 3 PUSH SI ; Save R1\r
+ 08A4 57 4 PUSH DI ; Save R1\r
+ 08A5 83 EC 08 SUB SP, 8 ; Allocate WorkSpace on Stack\r
+ 08A8 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 08AA C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ \r
+ 08AE A1 0000 R MOV AX, SCREEN_WIDTH ; Get Logical Line Width\r
+ 08B1 8B D8 MOV BX, AX ; BX = Screen Width\r
+ 08B3 4B DEC BX ; = Screen Width-1\r
+ 08B4 89 5E 00 MOV [BP].TGP_Width, BX ; Save for later use\r
+ \r
+ 08B7 F7 66 16 MUL [BP].TGP_Ypos ; Start of Line = Ypos * Width\r
+ 08BA 03 F8 ADD DI, AX ; DI -> Start of Line Ypos\r
+ \r
+ 08BC 8B 46 18 MOV AX, [BP].TGP_Xpos ; Get Xpos of Character\r
+ 08BF 8B C8 MOV CX, AX ; Save Copy of Xpos\r
+ 08C1 C1 E8 02 SHR AX, 2 ; Bytes into Line = Xpos/4\r
+ 08C4 03 F8 ADD DI, AX ; DI -> (Xpos, Ypos)\r
+ \r
+ ;Get Source ADDR of Character Bit Map & Save\r
+ \r
+ 08C6 8A 46 1A MOV AL, [BP].TGP_Char ; Get Character #\r
+ 08C9 A8 80 TEST AL, 080h ; Is Hi Bit Set?\r
+ 08CB 74 0C JZ @TGP_LowChar ; Nope, use low char set ptr\r
+ \r
+ 08CD 24 7F AND AL, 07Fh ; Mask Out Hi Bit\r
+ 08CF 8B 1E 0026 R MOV BX, CHARSET_HI ; BX = Char Set Ptr:Offset\r
+ 08D3 8B 16 0028 R MOV DX, CHARSET_HI+2 ; DX = Char Set Ptr:Segment\r
+ 08D7 EB 08 JMP s @TGP_Set_Char ; Go Setup Character Ptr\r
+ \r
+ 08D9 @TGP_LowChar:\r
+ \r
+ 08D9 8B 1E 0022 R MOV BX, CHARSET_LOW ; BX = Char Set Ptr:Offset\r
+ 08DD 8B 16 0024 R MOV DX, CHARSET_LOW+2 ; DX = Char Set Ptr:Segment\r
+ \r
+ 08E1 @TGP_Set_Char:\r
+ 08E1 89 56 04 MOV [BP].TGP_T_SETS, DX ; Save Segment on Stack\r
+ \r
+ 08E4 B4 00 MOV AH, 0 ; Valid #'s are 0..127\r
+ 08E6 C1 E0 03 SHL AX, 3 ; * 8 Bytes Per Bitmap\r
+ 08E9 03 D8 ADD BX, AX ; BX = Offset of Selected char\r
+ 08EB 89 5E 06 MOV [BP].TGP_T_SETO, BX ; Save Offset on Stack\r
+ \r
+ 08EE 83 E1 03 AND CX, PLANE_BITS ; Get Plane #\r
+ 08F1 B5 0F MOV CH, ALL_PLANES ; Get Initial Plane mask\r
+ 08F3 D2 E5 SHL CH, CL ; And shift into position\r
+ 08F5 80 E5 0F AND CH, ALL_PLANES ; And mask to lower nibble\r
+ \r
+ 08F8 B0 04 MOV AL, 04 ; 4-Plane # = # of initial\r
+ 08FA 2A C1 SUB AL, CL ; shifts to align bit mask\r
+ 08FC 8A C8 MOV CL, AL ; Shift Count for SHL\r
+ \r
+ ;Get segment of character map\r
+ \r
+ OUT_8 SC_Index, MAP_MASK ; Setup Plane selections\r
+ 08FE BA 03C4 1 MOV DX, SC_Index ; then Select Register\r
+ 0901 B0 02 1 MOV AL, MAP_MASK ; then Get Data Value\r
+ 0903 EE 1 OUT DX, AL ; Set I/O Register\r
+ 0904 42 INC DX ; DX -> SC_Data\r
+ \r
+ 0905 B0 08 MOV AL, 08 ; 8 Lines to Process\r
+ 0907 88 46 02 MOV [BP].TGP_Lines, AL ; Save on Stack\r
+ \r
+ 090A 8E 5E 04 MOV DS, [BP].TGP_T_SETS ; Point to character set\r
+ \r
+ 090D @TGP_DECODE_CHAR_BYTE:\r
+ \r
+ 090D 8B 76 06 MOV SI, [BP].TGP_T_SETO ; Get DS:SI = String\r
+ \r
+ 0910 8A 3C MOV BH, [SI] ; Get Bit Map\r
+ 0912 46 INC SI ; Point to Next Line\r
+ 0913 89 76 06 MOV [BP].TGP_T_SETO, SI ; And save new Pointer...\r
+ \r
+ 0916 8A 66 14 MOV AH, [BP].TGP_ColorF ; Get Foreground Color\r
+ \r
+ CLR BL ; Clear BL\r
+ 0919 32 DB 1 XOR BL, BL ; Set Register = 0\r
+ 091B D3 C3 ROL BX, CL ; BL holds left edge bits\r
+ 091D 8B F3 MOV SI, BX ; Use as Table Index\r
+ 091F 83 E6 0F AND SI, CHAR_BITS ; Get Low Bits\r
+ 0922 2E: 8A 84 0008 R MOV AL, Char_Plane_Data[SI] ; Get Mask in AL\r
+ 0927 74 04 JZ @TGP_NO_LEFT1BITS ; Skip if No Pixels to set\r
+ \r
+ 0929 EE OUT DX, AL ; Set up Screen Mask\r
+ 092A 26: 88 25 MOV ES:[DI], AH ; Write Foreground color\r
+ \r
+ ;Now Do Middle/Last Band\r
+ \r
+ 092D @TGP_NO_LEFT1BITS:\r
+ \r
+ 092D 47 INC DI ; Point to next Byte\r
+ 092E C1 C3 04 ROL BX, 4 ; Shift 4 bits\r
+ \r
+ 0931 8B F3 MOV SI, BX ; Make Lookup Pointer\r
+ 0933 83 E6 0F AND SI, CHAR_BITS ; Get Low Bits\r
+ 0936 2E: 8A 84 0008 R MOV AL, Char_Plane_Data[SI] ; Get Mask in AL\r
+ 093B 74 04 JZ @TGP_NO_MIDDLE1BITS ; Skip if no pixels to set\r
+ \r
+ 093D EE OUT DX, AL ; Set up Screen Mask\r
+ 093E 26: 88 25 MOV ES:[DI], AH ; Write Foreground color\r
+ \r
+ 0941 @TGP_NO_MIDDLE1BITS:\r
+ 0941 80 F5 0F XOR CH, ALL_PLANES ; Invert Clip Mask\r
+ 0944 80 F9 04 CMP CL, 4 ; Aligned by 4?\r
+ 0947 74 15 JZ @TGP_NEXT_LINE ; If so, Exit now..\r
+ \r
+ 0949 47 INC DI ; Point to next Byte\r
+ 094A C1 C3 04 ROL BX, 4 ; Shift 4 bits\r
+ \r
+ 094D 8B F3 MOV SI, BX ; Make Lookup Pointer\r
+ 094F 83 E6 0F AND SI, CHAR_BITS ; Get Low Bits\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 11 - 1\r
+\r
+\r
+ 0952 2E: 8A 84 0008 R MOV AL, Char_Plane_Data[SI] ; Get Mask in AL\r
+ 0957 74 04 JZ @TGP_NO_RIGHT1BITS ; Skip if No Pixels to set\r
+ \r
+ 0959 EE OUT DX, AL ; Set up Screen Mask\r
+ 095A 26: 88 25 MOV ES:[DI], AH ; Write Foreground color\r
+ \r
+ 095D @TGP_NO_RIGHT1BITS:\r
+ \r
+ 095D 4F DEC DI ; Adjust for Next Line Advance\r
+ \r
+ 095E @TGP_NEXT_LINE:\r
+ 095E 03 7E 00 ADD DI, [BP].TGP_Width ; Point to Next Line\r
+ 0961 80 F5 0F XOR CH, CHAR_BITS ; Flip the Clip mask back\r
+ \r
+ 0964 FE 4E 02 DEC [BP].TGP_Lines ; Count Down Lines\r
+ 0967 74 02 JZ @TGP_EXIT ; Ok... Done!\r
+ \r
+ 0969 EB A2 JMP @TGP_DECODE_CHAR_BYTE ; Again! Hey!\r
+ \r
+ 096B @TGP_EXIT:\r
+ 096B 83 C4 08 ADD SP, 08 ; Deallocate stack workspace\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 096E 5F 1 POP DI ; Restore R1\r
+ 096F 5E 2 POP SI ; Restore R1\r
+ 0970 1F 3 POP DS ; Restore R1\r
+ 0971 5D 4 POP BP ; Restore R1\r
+ 0972 CA 0008 RET 8 ; Exit and Clean up Stack\r
+ \r
+ 0975 TGPRINTC ENDP\r
+ \r
+ \r
+ ;===============================================================\r
+ ;PRINT_STR (SEG String, MaxLen%, Xpos%, Ypos%, ColorF%, ColorB%)\r
+ ;===============================================================\r
+ ;\r
+ ; Routine to quickly Print a null terminated ASCII string on the\r
+ ; active display page up to a maximum length.\r
+ ;\r
+ ; ENTRY: String = Far Pointer to ASCII string to print\r
+ ; MaxLen = # of characters to print if no null found\r
+ ; Xpos = X position to draw Text at\r
+ ; Ypos = Y position of to draw Text at\r
+ ; ColorF = Color to draw text in\r
+ ; ColorB = Color to set background to\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 001A PS_STACK STRUC\r
+ 0000 0000 0000 0000 DW ?x4 ; DI, SI, DS, BP\r
+ 0000\r
+ 0008 00000000 DD ? ; Caller\r
+ 000C 0000 PS_ColorB DW ? ; Background Color\r
+ 000E 0000 PS_ColorF DW ? ; Text Color\r
+ 0010 0000 PS_Ypos DW ? ; Y Position to Print at\r
+ 0012 0000 PS_Xpos DW ? ; X position to Print at\r
+ 0014 0000 PS_Len DW ? ; Maximum Length of string to print\r
+ 0016 0000 0000 PS_Text DW ?,? ; Far Ptr to Text String\r
+ PS_STACK ENDS\r
+ \r
+ PUBLIC PRINT_STR\r
+ \r
+ 0975 PRINT_STR PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 0975 55 1 PUSH BP ; Save R1\r
+ 0976 1E 2 PUSH DS ; Save R1\r
+ 0977 56 3 PUSH SI ; Save R1\r
+ 0978 57 4 PUSH DI ; Save R1\r
+ 0979 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 097B @PS_Print_It:\r
+ \r
+ 097B 8B 4E 14 MOV CX, [BP].PS_Len ; Get Remaining text Length\r
+ 097E E3 2F JCXZ @PS_Exit ; Exit when out of text\r
+ \r
+ 0980 C4 7E 16 LES DI, d [BP].PS_Text ; ES:DI -> Current Char in Text\r
+ 0983 26: 8A 05 MOV AL, ES:[DI] ; AL = Text Character\r
+ 0986 25 00FF AND AX, 00FFh ; Clear High Word\r
+ 0989 74 24 JZ @PS_Exit ; Exit if null character\r
+ \r
+ 098B FF 4E 14 DEC [BP].PS_Len ; Remaining Text length--\r
+ 098E FF 46 16 INC [BP].PS_Text ; Point to Next text char\r
+ \r
+ ; Set up Call to GPRINTC\r
+ \r
+ 0991 50 PUSH AX ; Set Character Parameter\r
+ 0992 8B 5E 12 MOV BX, [BP].PS_Xpos ; Get Xpos\r
+ 0995 53 PUSH BX ; Set Xpos Parameter\r
+ 0996 83 C3 08 ADD BX, 8 ; Advance 1 Char to Right\r
+ 0999 89 5E 12 MOV [BP].PS_Xpos, BX ; Save for next time through\r
+ \r
+ 099C 8B 5E 10 MOV BX, [BP].PS_Ypos ; Get Ypos\r
+ 099F 53 PUSH BX ; Set Ypos Parameter\r
+ \r
+ 09A0 8B 5E 0E MOV BX, [BP].PS_ColorF ; Get Text Color\r
+ 09A3 53 PUSH BX ; Set ColorF Parameter\r
+ \r
+ 09A4 8B 5E 0C MOV BX, [BP].PS_ColorB ; Get Background Color\r
+ 09A7 53 PUSH BX ; Set ColorB Parameter\r
+ \r
+ 09A8 9A ---- 07A3 R CALL f GPRINTC ; Print Character!\r
+ 09AD EB CC JMP s @PS_Print_It ; Process next character\r
+ \r
+ 09AF @PS_Exit:\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 09AF 5F 1 POP DI ; Restore R1\r
+ 09B0 5E 2 POP SI ; Restore R1\r
+ 09B1 1F 3 POP DS ; Restore R1\r
+ 09B2 5D 4 POP BP ; Restore R1\r
+ 09B3 CA 000E RET 14 ; Exit and Clean up Stack\r
+ \r
+ 09B6 PRINT_STR ENDP\r
+ \r
+ \r
+ ;================================================================\r
+ ;TPRINT_STR (SEG String, MaxLen%, Xpos%, Ypos%, ColorF%, ColorB%)\r
+ ;================================================================\r
+ ;\r
+ ; Routine to quickly transparently Print a null terminated ASCII\r
+ ; string on the active display page up to a maximum length.\r
+ ;\r
+ ; ENTRY: String = Far Pointer to ASCII string to print\r
+ ; MaxLen = # of characters to print if no null found\r
+ ; Xpos = X position to draw Text at\r
+ ; Ypos = Y position of to draw Text at\r
+ ; ColorF = Color to draw text in\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 0018 TPS_STACK STRUC\r
+ 0000 0000 0000 0000 DW ?x4 ; DI, SI, DS, BP\r
+ 0000\r
+ 0008 00000000 DD ? ; Caller\r
+ 000C 0000 TPS_ColorF DW ? ; Text Color\r
+ 000E 0000 TPS_Ypos DW ? ; Y Position to Print at\r
+ 0010 0000 TPS_Xpos DW ? ; X position to Print at\r
+ 0012 0000 TPS_Len DW ? ; Maximum Length of string to print\r
+ 0014 0000 0000 TPS_Text DW ?,? ; Far Ptr to Text String\r
+ TPS_STACK ENDS\r
+ \r
+ PUBLIC TPRINT_STR\r
+ \r
+ 09B6 TPRINT_STR PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 09B6 55 1 PUSH BP ; Save R1\r
+ 09B7 1E 2 PUSH DS ; Save R1\r
+ 09B8 56 3 PUSH SI ; Save R1\r
+ 09B9 57 4 PUSH DI ; Save R1\r
+ 09BA 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 09BC @TPS_Print_It:\r
+ \r
+ 09BC 8B 4E 12 MOV CX, [BP].TPS_Len ; Get Remaining text Length\r
+ 09BF E3 2B JCXZ @TPS_Exit ; Exit when out of text\r
+ \r
+ 09C1 C4 7E 14 LES DI, d [BP].TPS_Text ; ES:DI -> Current Char in Text\r
+ 09C4 26: 8A 05 MOV AL, ES:[DI] ; AL = Text Character\r
+ 09C7 25 00FF AND AX, 00FFh ; Clear High Word\r
+ 09CA 74 20 JZ @TPS_Exit ; Exit if null character\r
+ \r
+ 09CC FF 4E 12 DEC [BP].TPS_Len ; Remaining Text length--\r
+ 09CF FF 46 14 INC [BP].TPS_Text ; Point to Next text char\r
+ \r
+ ; Set up Call to TGPRINTC\r
+ \r
+ 09D2 50 PUSH AX ; Set Character Parameter\r
+ 09D3 8B 5E 10 MOV BX, [BP].TPS_Xpos ; Get Xpos\r
+ 09D6 53 PUSH BX ; Set Xpos Parameter\r
+ 09D7 83 C3 08 ADD BX, 8 ; Advance 1 Char to Right\r
+ 09DA 89 5E 10 MOV [BP].TPS_Xpos, BX ; Save for next time through\r
+ \r
+ 09DD 8B 5E 0E MOV BX, [BP].TPS_Ypos ; Get Ypos\r
+ 09E0 53 PUSH BX ; Set Ypos Parameter\r
+ \r
+ 09E1 8B 5E 0C MOV BX, [BP].TPS_ColorF ; Get Text Color\r
+ 09E4 53 PUSH BX ; Set ColorF Parameter\r
+ \r
+ 09E5 9A ---- 08A1 R CALL f TGPRINTC ; Print Character!\r
+ 09EA EB D0 JMP s @TPS_Print_It ; Process next character\r
+ \r
+ 09EC @TPS_Exit:\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 09EC 5F 1 POP DI ; Restore R1\r
+ 09ED 5E 2 POP SI ; Restore R1\r
+ 09EE 1F 3 POP DS ; Restore R1\r
+ 09EF 5D 4 POP BP ; Restore R1\r
+ 09F0 CA 000C RET 12 ; Exit and Clean up Stack\r
+ \r
+ 09F3 TPRINT_STR ENDP\r
+ \r
+ \r
+ ;===========================================\r
+ ;SET_DISPLAY_FONT(SEG FontData, FontNumber%)\r
+ ;===========================================\r
+ ;\r
+ ; Allows the user to specify their own font data for\r
+ ; wither the lower or upper 128 characters.\r
+ ;\r
+ ; ENTRY: FontData = Far Pointer to Font Bitmaps\r
+ ; FontNumber = Which half of set this is\r
+ ; = 0, Lower 128 characters\r
+ ; = 1, Upper 128 characters\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 000C SDF_STACK STRUC\r
+ 0000 0000 DW ? ; BP\r
+ 0002 00000000 DD ? ; Caller\r
+ 0006 0000 SDF_Which DW ? ; Hi Table/Low Table Flag\r
+ 0008 00000000 SDF_Font DD ? ; Far Ptr to Font Table\r
+ SDF_STACK ENDS\r
+ \r
+ PUBLIC SET_DISPLAY_FONT\r
+ \r
+ 09F3 SET_DISPLAY_FONT PROC FAR\r
+ \r
+ 09F3 55 PUSH BP ; Preserve Registers\r
+ 09F4 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 09F6 C4 7E 08 LES DI, [BP].SDF_Font ; Get Far Ptr to Font\r
+ \r
+ 09F9 BE 0022 R MOV SI, o CHARSET_LOW ; Assume Lower 128 chars\r
+ 09FC F7 46 06 0001 TEST [BP].SDF_Which, 1 ; Font #1 selected?\r
+ 0A01 74 03 JZ @SDF_Set_Font ; If not, skip ahead\r
+ \r
+ 0A03 BE 0026 R MOV SI, o CHARSET_HI ; Ah, really it's 128-255\r
+ \r
+ 0A06 @SDF_Set_Font:\r
+ 0A06 89 3C MOV [SI], DI ; Set Font Pointer Offset\r
+ 0A08 8C 44 02 MOV [SI+2], ES ; Set Font Pointer Segment\r
+ \r
+ 0A0B 5D POP BP ; Restore Registers\r
+ 0A0C CA 0006 RET 6 ; We are Done.. Outa here\r
+ \r
+ 0A0F SET_DISPLAY_FONT ENDP\r
+ \r
+ \r
+ ; ===== BITMAP (SPRITE) DISPLAY ROUTINES =====\r
+ \r
+ ;======================================================\r
+ ;DRAW_BITMAP (SEG Image, Xpos%, Ypos%, Width%, Height%)\r
+ ;======================================================\r
+ ;\r
+ ; Draws a variable sized Graphics Bitmap such as a\r
+ ; picture or an Icon on the current Display Page in\r
+ ; Mode X. The Bitmap is stored in a linear byte array\r
+ ; corresponding to (0,0) (1,0), (2,0) .. (Width, Height)\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 12 - 1\r
+\r
+\r
+ ; This is the same linear manner as mode 13h graphics.\r
+ ;\r
+ ; ENTRY: Image = Far Pointer to Bitmap Data\r
+ ; Xpos = X position to Place Upper Left pixel at\r
+ ; Ypos = Y position to Place Upper Left pixel at\r
+ ; Width = Width of the Bitmap in Pixels\r
+ ; Height = Height of the Bitmap in Pixels\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 0022 DB_STACK STRUC\r
+ 0000 0000 DB_LineO DW ? ; Offset to Next Line\r
+ 0002 0000 DB_PixCount DW ? ; (Minimum) # of Pixels/Line\r
+ 0004 0000 DB_Start DW ? ; Addr of Upper Left Pixel\r
+ 0006 0000 DB_PixSkew DW ? ; # of bytes to Adjust EOL\r
+ 0008 0000 DB_SkewFlag DW ? ; Extra Pix on Plane Flag\r
+ 000A 0000 0000 0000 DW ?x4 ; DI, SI, DS, BP\r
+ 0000\r
+ 0012 00000000 DD ? ; Caller\r
+ 0016 0000 DB_Height DW ? ; Height of Bitmap in Pixels\r
+ 0018 0000 DB_Width DW ? ; Width of Bitmap in Pixels\r
+ 001A 0000 DB_Ypos DW ? ; Y position to Draw Bitmap at\r
+ 001C 0000 DB_Xpos DW ? ; X position to Draw Bitmap at\r
+ 001E 00000000 DB_Image DD ? ; Far Pointer to Graphics Bitmap\r
+ DB_STACK ENDS\r
+ \r
+ PUBLIC DRAW_BITMAP\r
+ \r
+ 0A0F DRAW_BITMAP PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 0A0F 55 1 PUSH BP ; Save R1\r
+ 0A10 1E 2 PUSH DS ; Save R1\r
+ 0A11 56 3 PUSH SI ; Save R1\r
+ 0A12 57 4 PUSH DI ; Save R1\r
+ 0A13 83 EC 0A SUB SP, 10 ; Allocate workspace\r
+ 0A16 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 0A18 C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ 0A1C FC CLD ; Direction Flag = Forward\r
+ \r
+ 0A1D 8B 46 1A MOV AX, [BP].DB_Ypos ; Get UL Corner Ypos\r
+ 0A20 F7 26 0000 R MUL SCREEN_WIDTH ; AX = Offset to Line Ypos\r
+ \r
+ 0A24 8B 5E 1C MOV BX, [BP].DB_Xpos ; Get UL Corner Xpos\r
+ 0A27 8A CB MOV CL, BL ; Save Plane # in CL\r
+ 0A29 C1 EB 02 SHR BX, 2 ; Xpos/4 = Offset Into Line\r
+ \r
+ 0A2C 03 F8 ADD DI, AX ; ES:DI -> Start of Line\r
+ 0A2E 03 FB ADD DI, BX ; ES:DI -> Upper Left Pixel\r
+ 0A30 89 7E 04 MOV [BP].DB_Start, DI ; Save Starting Addr\r
+ \r
+ ; Compute line to line offset\r
+ \r
+ 0A33 8B 5E 18 MOV BX, [BP].DB_Width ; Get Width of Image\r
+ 0A36 8B D3 MOV DX, BX ; Save Copy in DX\r
+ 0A38 C1 EB 02 SHR BX, 2 ; /4 = width in bands\r
+ 0A3B A1 0000 R MOV AX, SCREEN_WIDTH ; Get Screen Width\r
+ 0A3E 2B C3 SUB AX, BX ; - (Bitmap Width/4)\r
+ \r
+ 0A40 89 46 00 MOV [BP].DB_LineO, AX ; Save Line Width offset\r
+ 0A43 89 5E 02 MOV [BP].DB_PixCount, BX ; Minimum # pix to copy\r
+ \r
+ 0A46 83 E2 03 AND DX, PLANE_BITS ; Get "partial band" size (0-3)\r
+ 0A49 89 56 06 MOV [BP].DB_PixSkew, DX ; Also End of Line Skew\r
+ 0A4C 89 56 08 MOV [BP].DB_SkewFlag, DX ; Save as Flag/Count\r
+ \r
+ 0A4F 83 E1 03 AND CX, PLANE_BITS ; CL = Starting Plane #\r
+ 0A52 B8 1102 MOV AX, MAP_MASK_PLANE2 ; Plane Mask & Plane Select\r
+ 0A55 D2 E4 SHL AH, CL ; Select correct Plane\r
+ OUT_16 SC_Index, AX ; Select Plane...\r
+ 0A57 BA 03C4 1 MOV DX, SC_Index ; then Select Register\r
+ 0A5A EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ 0A5B 8A FC MOV BH, AH ; BH = Saved Plane Mask\r
+ 0A5D B3 04 MOV BL, 4 ; BL = Planes to Copy\r
+ \r
+ 0A5F @DB_COPY_PLANE:\r
+ \r
+ 0A5F C5 76 1E LDS SI, [BP].DB_Image ; DS:SI-> Source Image\r
+ 0A62 8B 56 16 MOV DX, [BP].DB_Height ; # of Lines to Copy\r
+ 0A65 8B 7E 04 MOV DI, [BP].DB_Start ; ES:DI-> Dest pos\r
+ \r
+ 0A68 @DB_COPY_LINE:\r
+ 0A68 8B 4E 02 MOV CX, [BP].DB_PixCount ; Min # to copy\r
+ \r
+ 0A6B F6 C1 FC TEST CL, 0FCh ; 16+PixWide?\r
+ 0A6E 74 18 JZ @DB_COPY_REMAINDER ; Nope...\r
+ \r
+ ; Pixel Copy loop has been unrolled to x4\r
+ \r
+ 0A70 @DB_COPY_LOOP:\r
+ 0A70 A4 MOVSB ; Copy Bitmap Pixel\r
+ 0A71 83 C6 03 ADD SI, 3 ; Skip to Next Byte in same plane\r
+ 0A74 A4 MOVSB ; Copy Bitmap Pixel\r
+ 0A75 83 C6 03 ADD SI, 3 ; Skip to Next Byte in same plane\r
+ 0A78 A4 MOVSB ; Copy Bitmap Pixel\r
+ 0A79 83 C6 03 ADD SI, 3 ; Skip to Next Byte in same plane\r
+ 0A7C A4 MOVSB ; Copy Bitmap Pixel\r
+ 0A7D 83 C6 03 ADD SI, 3 ; Skip to Next Byte in same plane\r
+ \r
+ 0A80 80 E9 04 SUB CL, 4 ; Pixels to Copy=-4\r
+ 0A83 F6 C1 FC TEST CL, 0FCh ; 4+ Pixels Left?\r
+ 0A86 75 E8 JNZ @DB_COPY_LOOP ; if so, do another block\r
+ \r
+ 0A88 @DB_COPY_REMAINDER:\r
+ 0A88 E3 07 JCXZ @DB_NEXT_LINE ; Any Pixels left on line\r
+ \r
+ 0A8A @DB_COPY2:\r
+ 0A8A A4 MOVSB ; Copy Bitmap Pixel\r
+ 0A8B 83 C6 03 ADD SI,3 ; Skip to Next Byte in same plane\r
+ LOOPx CX, @DB_COPY2 ; Pixels to Copy--, Loop until done\r
+ 0A8E 49 1 DEC CX ; Counter--\r
+ 0A8F 75 F9 1 JNZ @DB_COPY2 ; Jump if not 0\r
+ \r
+ 0A91 @DB_NEXT_LINE:\r
+ \r
+ ; any Partial Pixels? (some planes only)\r
+ \r
+ 0A91 0B 4E 08 OR CX, [BP].DB_SkewFlag ; Get Skew Count\r
+ 0A94 74 03 JZ @DB_NEXT2 ; if no partial pixels\r
+ \r
+ 0A96 A4 MOVSB ; Copy Bitmap Pixel\r
+ 0A97 4F DEC DI ; Back up to align\r
+ 0A98 4E DEC SI ; Back up to align\r
+ \r
+ 0A99 @DB_NEXT2:\r
+ 0A99 03 76 06 ADD SI, [BP].DB_PixSkew ; Adjust Skew\r
+ 0A9C 03 7E 00 ADD DI, [BP].DB_LineO ; Set to Next Display Line\r
+ LOOPx DX, @DB_COPY_LINE ; Lines to Copy--, Loop if more\r
+ 0A9F 4A 1 DEC DX ; Counter--\r
+ 0AA0 75 C6 1 JNZ @DB_COPY_LINE ; Jump if not 0\r
+ \r
+ ; Copy Next Plane....\r
+ \r
+ 0AA2 FE CB DEC BL ; Planes to Go--\r
+ 0AA4 74 1B JZ @DB_Exit ; Hey! We are done\r
+ \r
+ 0AA6 D0 C7 ROL BH, 1 ; Next Plane in line...\r
+ OUT_8 SC_Data, BH ; Select Plane\r
+ 0AA8 BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 0AAB 8A C7 1 MOV AL, BH ; then Get Data Value\r
+ 0AAD EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0AAE 3C 12 CMP AL, 12h ; Carry Set if AL=11h\r
+ 0AB0 83 56 04 00 ADC [BP].DB_Start, 0 ; Screen Addr =+Carry\r
+ 0AB4 FF 46 1E INC w [BP].DB_Image ; Start @ Next Byte\r
+ \r
+ 0AB7 83 6E 08 01 SUB [BP].DB_SkewFlag, 1 ; Reduce Planes to Skew\r
+ 0ABB 83 56 08 00 ADC [BP].DB_SkewFlag, 0 ; Back to 0 if it was -1\r
+ \r
+ 0ABF EB 9E JMP s @DB_COPY_PLANE ; Go Copy the Next Plane\r
+ \r
+ 0AC1 @DB_Exit:\r
+ 0AC1 83 C4 0A ADD SP, 10 ; Deallocate workspace\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 0AC4 5F 1 POP DI ; Restore R1\r
+ 0AC5 5E 2 POP SI ; Restore R1\r
+ 0AC6 1F 3 POP DS ; Restore R1\r
+ 0AC7 5D 4 POP BP ; Restore R1\r
+ 0AC8 CA 000C RET 12 ; Exit and Clean up Stack\r
+ \r
+ 0ACB DRAW_BITMAP ENDP\r
+ \r
+ \r
+ ;=======================================================\r
+ ;TDRAW_BITMAP (SEG Image, Xpos%, Ypos%, Width%, Height%)\r
+ ;=======================================================\r
+ ;\r
+ ; Transparently Draws a variable sized Graphics Bitmap\r
+ ; such as a picture or an Icon on the current Display Page\r
+ ; in Mode X. Pixels with a value of 0 are not drawn,\r
+ ; leaving the previous "background" contents intact.\r
+ ;\r
+ ; The Bitmap format is the same as for the DRAW_BITMAP function.\r
+ ;\r
+ ; ENTRY: Image = Far Pointer to Bitmap Data\r
+ ; Xpos = X position to Place Upper Left pixel at\r
+ ; Ypos = Y position to Place Upper Left pixel at\r
+ ; Width = Width of the Bitmap in Pixels\r
+ ; Height = Height of the Bitmap in Pixels\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 0022 TB_STACK STRUC\r
+ 0000 0000 TB_LineO DW ? ; Offset to Next Line\r
+ 0002 0000 TB_PixCount DW ? ; (Minimum) # of Pixels/Line\r
+ 0004 0000 TB_Start DW ? ; Addr of Upper Left Pixel\r
+ 0006 0000 TB_PixSkew DW ? ; # of bytes to Adjust EOL\r
+ 0008 0000 TB_SkewFlag DW ? ; Extra Pix on Plane Flag\r
+ 000A 0000 0000 0000 DW ?x4 ; DI, SI, DS, BP\r
+ 0000\r
+ 0012 00000000 DD ? ; Caller\r
+ 0016 0000 TB_Height DW ? ; Height of Bitmap in Pixels\r
+ 0018 0000 TB_Width DW ? ; Width of Bitmap in Pixels\r
+ 001A 0000 TB_Ypos DW ? ; Y position to Draw Bitmap at\r
+ 001C 0000 TB_Xpos DW ? ; X position to Draw Bitmap at\r
+ 001E 00000000 TB_Image DD ? ; Far Pointer to Graphics Bitmap\r
+ TB_STACK ENDS\r
+ \r
+ PUBLIC TDRAW_BITMAP\r
+ \r
+ 0ACB TDRAW_BITMAP PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 0ACB 55 1 PUSH BP ; Save R1\r
+ 0ACC 1E 2 PUSH DS ; Save R1\r
+ 0ACD 56 3 PUSH SI ; Save R1\r
+ 0ACE 57 4 PUSH DI ; Save R1\r
+ 0ACF 83 EC 0A SUB SP, 10 ; Allocate workspace\r
+ 0AD2 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ 0AD4 C4 3E 0014 R LES DI, d CURRENT_PAGE ; Point to Active VGA Page\r
+ 0AD8 FC CLD ; Direction Flag = Forward\r
+ \r
+ 0AD9 8B 46 1A MOV AX, [BP].TB_Ypos ; Get UL Corner Ypos\r
+ 0ADC F7 26 0000 R MUL SCREEN_WIDTH ; AX = Offset to Line Ypos\r
+ \r
+ 0AE0 8B 5E 1C MOV BX, [BP].TB_Xpos ; Get UL Corner Xpos\r
+ 0AE3 8A CB MOV CL, BL ; Save Plane # in CL\r
+ 0AE5 C1 EB 02 SHR BX, 2 ; Xpos/4 = Offset Into Line\r
+ \r
+ 0AE8 03 F8 ADD DI, AX ; ES:DI -> Start of Line\r
+ 0AEA 03 FB ADD DI, BX ; ES:DI -> Upper Left Pixel\r
+ 0AEC 89 7E 04 MOV [BP].TB_Start, DI ; Save Starting Addr\r
+ \r
+ ; Compute line to line offset\r
+ \r
+ 0AEF 8B 5E 18 MOV BX, [BP].TB_Width ; Get Width of Image\r
+ 0AF2 8B D3 MOV DX, BX ; Save Copy in DX\r
+ 0AF4 C1 EB 02 SHR BX, 2 ; /4 = width in bands\r
+ 0AF7 A1 0000 R MOV AX, SCREEN_WIDTH ; Get Screen Width\r
+ 0AFA 2B C3 SUB AX, BX ; - (Bitmap Width/4)\r
+ \r
+ 0AFC 89 46 00 MOV [BP].TB_LineO, AX ; Save Line Width offset\r
+ 0AFF 89 5E 02 MOV [BP].TB_PixCount, BX ; Minimum # pix to copy\r
+ \r
+ 0B02 83 E2 03 AND DX, PLANE_BITS ; Get "partial band" size (0-3)\r
+ 0B05 89 56 06 MOV [BP].TB_PixSkew, DX ; Also End of Line Skew\r
+ 0B08 89 56 08 MOV [BP].TB_SkewFlag, DX ; Save as Flag/Count\r
+ \r
+ 0B0B 83 E1 03 AND CX, PLANE_BITS ; CL = Starting Plane #\r
+ 0B0E B8 1102 MOV AX, MAP_MASK_PLANE2 ; Plane Mask & Plane Select\r
+ 0B11 D2 E4 SHL AH, CL ; Select correct Plane\r
+ OUT_16 SC_Index, AX ; Select Plane...\r
+ 0B13 BA 03C4 1 MOV DX, SC_Index ; then Select Register\r
+ 0B16 EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ 0B17 8A FC MOV BH, AH ; BH = Saved Plane Mask\r
+ 0B19 B3 04 MOV BL, 4 ; BL = Planes to Copy\r
+ \r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 13 - 1\r
+\r
+\r
+ 0B1B @TB_COPY_PLANE:\r
+ \r
+ 0B1B C5 76 1E LDS SI, [BP].TB_Image ; DS:SI-> Source Image\r
+ 0B1E 8B 56 16 MOV DX, [BP].TB_Height ; # of Lines to Copy\r
+ 0B21 8B 7E 04 MOV DI, [BP].TB_Start ; ES:DI-> Dest pos\r
+ \r
+ ; Here AH is set with the value to be considered\r
+ ; "Transparent". It can be changed!\r
+ \r
+ 0B24 B4 00 MOV AH, 0 ; Value to Detect 0\r
+ \r
+ 0B26 @TB_COPY_LINE:\r
+ 0B26 8B 4E 02 MOV CX, [BP].TB_PixCount ; Min # to copy\r
+ \r
+ 0B29 F6 C1 FC TEST CL, 0FCh ; 16+PixWide?\r
+ 0B2C 74 3A JZ @TB_COPY_REMAINDER ; Nope...\r
+ \r
+ ; Pixel Copy loop has been unrolled to x4\r
+ \r
+ 0B2E @TB_COPY_LOOP:\r
+ 0B2E AC LODSB ; Get Pixel Value in AL\r
+ 0B2F 83 C6 03 ADD SI, 3 ; Skip to Next Byte in same plane\r
+ 0B32 38 E0 CMP AL, AH ; It is "Transparent"?\r
+ 0B34 74 03 JE @TB_SKIP_01 ; Skip ahead if so\r
+ 0B36 26: 88 05 MOV ES:[DI], AL ; Copy Pixel to VGA screen\r
+ \r
+ 0B39 @TB_SKIP_01:\r
+ 0B39 AC LODSB ; Get Pixel Value in AL\r
+ 0B3A 83 C6 03 ADD SI, 3 ; Skip to Next Byte in same plane\r
+ 0B3D 38 E0 CMP AL, AH ; It is "Transparent"?\r
+ 0B3F 74 04 JE @TB_SKIP_02 ; Skip ahead if so\r
+ 0B41 26: 88 45 01 MOV ES:[DI+1], AL ; Copy Pixel to VGA screen\r
+ \r
+ 0B45 @TB_SKIP_02:\r
+ 0B45 AC LODSB ; Get Pixel Value in AL\r
+ 0B46 83 C6 03 ADD SI, 3 ; Skip to Next Byte in same plane\r
+ 0B49 38 E0 CMP AL, AH ; It is "Transparent"?\r
+ 0B4B 74 04 JE @TB_SKIP_03 ; Skip ahead if so\r
+ 0B4D 26: 88 45 02 MOV ES:[DI+2], AL ; Copy Pixel to VGA screen\r
+ \r
+ 0B51 @TB_SKIP_03:\r
+ 0B51 AC LODSB ; Get Pixel Value in AL\r
+ 0B52 83 C6 03 ADD SI, 3 ; Skip to Next Byte in same plane\r
+ 0B55 38 E0 CMP AL, AH ; It is "Transparent"?\r
+ 0B57 74 04 JE @TB_SKIP_04 ; Skip ahead if so\r
+ 0B59 26: 88 45 03 MOV ES:[DI+3], AL ; Copy Pixel to VGA screen\r
+ \r
+ 0B5D @TB_SKIP_04:\r
+ 0B5D 83 C7 04 ADD DI, 4 ; Adjust Pixel Write Location\r
+ 0B60 80 E9 04 SUB CL, 4 ; Pixels to Copy=-4\r
+ 0B63 F6 C1 FC TEST CL, 0FCh ; 4+ Pixels Left?\r
+ 0B66 75 C6 JNZ @TB_COPY_LOOP ; if so, do another block\r
+ \r
+ 0B68 @TB_COPY_REMAINDER:\r
+ 0B68 E3 0F JCXZ @TB_NEXT_LINE ; Any Pixels left on line\r
+ \r
+ 0B6A @TB_COPY2:\r
+ 0B6A AC LODSB ; Get Pixel Value in AL\r
+ 0B6B 83 C6 03 ADD SI, 3 ; Skip to Next Byte in same plane\r
+ 0B6E 38 E0 CMP AL, AH ; It is "Transparent"?\r
+ 0B70 74 03 JE @TB_SKIP_05 ; Skip ahead if so\r
+ 0B72 26: 88 05 MOV ES:[DI], AL ; Copy Pixel to VGA screen\r
+ \r
+ 0B75 @TB_SKIP_05:\r
+ 0B75 47 INC DI ; Advance Dest Addr\r
+ LOOPx CX, @TB_COPY2 ; Pixels to Copy--, Loop until done\r
+ 0B76 49 1 DEC CX ; Counter--\r
+ 0B77 75 F1 1 JNZ @TB_COPY2 ; Jump if not 0\r
+ \r
+ 0B79 @TB_NEXT_LINE:\r
+ \r
+ ; any Partial Pixels? (some planes only)\r
+ \r
+ 0B79 0B 4E 08 OR CX, [BP].TB_SkewFlag ; Get Skew Count\r
+ 0B7C 74 09 JZ @TB_NEXT2 ; if no partial pixels\r
+ \r
+ 0B7E AC LODSB ; Get Pixel Value in AL\r
+ 0B7F 4E DEC SI ; Backup to Align\r
+ 0B80 38 E0 CMP AL, AH ; It is "Transparent"?\r
+ 0B82 74 03 JE @TB_NEXT2 ; Skip ahead if so\r
+ 0B84 26: 88 05 MOV ES:[DI], AL ; Copy Pixel to VGA screen\r
+ \r
+ 0B87 @TB_NEXT2:\r
+ 0B87 03 76 06 ADD SI, [BP].TB_PixSkew ; Adjust Skew\r
+ 0B8A 03 7E 00 ADD DI, [BP].TB_LineO ; Set to Next Display Line\r
+ LOOPx DX, @TB_COPY_LINE ; Lines to Copy--, Loop if More\r
+ 0B8D 4A 1 DEC DX ; Counter--\r
+ 0B8E 75 96 1 JNZ @TB_COPY_LINE ; Jump if not 0\r
+ \r
+ ;Copy Next Plane....\r
+ \r
+ 0B90 FE CB DEC BL ; Planes to Go--\r
+ 0B92 74 1C JZ @TB_Exit ; Hey! We are done\r
+ \r
+ 0B94 D0 C7 ROL BH, 1 ; Next Plane in line...\r
+ OUT_8 SC_Data, BH ; Select Plane\r
+ 0B96 BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 0B99 8A C7 1 MOV AL, BH ; then Get Data Value\r
+ 0B9B EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0B9C 3C 12 CMP AL, 12h ; Carry Set if AL=11h\r
+ 0B9E 83 56 04 00 ADC [BP].TB_Start, 0 ; Screen Addr =+Carry\r
+ 0BA2 FF 46 1E INC w [BP].TB_Image ; Start @ Next Byte\r
+ \r
+ 0BA5 83 6E 08 01 SUB [BP].TB_SkewFlag, 1 ; Reduce Planes to Skew\r
+ 0BA9 83 56 08 00 ADC [BP].TB_SkewFlag, 0 ; Back to 0 if it was -1\r
+ \r
+ 0BAD E9 FF6B JMP @TB_COPY_PLANE ; Go Copy the next Plane\r
+ \r
+ 0BB0 @TB_Exit:\r
+ 0BB0 83 C4 0A ADD SP, 10 ; Deallocate workspace\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 0BB3 5F 1 POP DI ; Restore R1\r
+ 0BB4 5E 2 POP SI ; Restore R1\r
+ 0BB5 1F 3 POP DS ; Restore R1\r
+ 0BB6 5D 4 POP BP ; Restore R1\r
+ 0BB7 CA 000C RET 12 ; Exit and Clean up Stack\r
+ \r
+ 0BBA TDRAW_BITMAP ENDP\r
+ \r
+ \r
+ ; ==== VIDEO MEMORY to VIDEO MEMORY COPY ROUTINES =====\r
+ \r
+ ;==================================\r
+ ;COPY_PAGE (SourcePage%, DestPage%)\r
+ ;==================================\r
+ ;\r
+ ; Duplicate on display page onto another\r
+ ;\r
+ ; ENTRY: SourcePage = Display Page # to Duplicate\r
+ ; DestPage = Display Page # to hold copy\r
+ ;\r
+ ; EXIT: No meaningful values returned\r
+ ;\r
+ \r
+ 0010 CP_STACK STRUC\r
+ 0000 0000 0000 0000 DW ?x4 ; DI, SI, DS, BP\r
+ 0000\r
+ 0008 00000000 DD ? ; Caller\r
+ 000C 0000 CP_DestP DW ? ; Page to hold copied image\r
+ 000E 0000 CP_SourceP DW ? ; Page to Make copy from\r
+ CP_STACK ENDS\r
+ \r
+ PUBLIC COPY_PAGE\r
+ \r
+ 0BBA COPY_PAGE PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 0BBA 55 1 PUSH BP ; Save R1\r
+ 0BBB 1E 2 PUSH DS ; Save R1\r
+ 0BBC 56 3 PUSH SI ; Save R1\r
+ 0BBD 57 4 PUSH DI ; Save R1\r
+ 0BBE 8B EC MOV BP, SP ; Set up Stack Frame\r
+ 0BC0 FC CLD ; Block Xfer Forwards\r
+ \r
+ ; Make sure Page #'s are valid\r
+ \r
+ 0BC1 8B 46 0E MOV AX, [BP].CP_SourceP ; Get Source Page #\r
+ 0BC4 3B 06 0004 R CMP AX, LAST_PAGE ; is it > Max Page #?\r
+ 0BC8 73 3D JAE @CP_Exit ; if so, abort\r
+ \r
+ 0BCA 8B 5E 0C MOV BX, [BP].CP_DestP ; Get Destination Page #\r
+ 0BCD 3B 1E 0004 R CMP BX, LAST_PAGE ; is it > Max Page #?\r
+ 0BD1 73 34 JAE @CP_Exit ; if so, abort\r
+ \r
+ 0BD3 3B C3 CMP AX, BX ; Pages #'s the same?\r
+ 0BD5 74 30 JE @CP_Exit ; if so, abort\r
+ \r
+ ; Setup DS:SI and ES:DI to Video Pages\r
+ \r
+ 0BD7 D1 E3 SHL BX, 1 ; Scale index to Word\r
+ 0BD9 8B BF 0006 R MOV DI, PAGE_ADDR[BX] ; Offset to Dest Page\r
+ \r
+ 0BDD 8B D8 MOV BX, AX ; Index to Source page\r
+ 0BDF D1 E3 SHL BX, 1 ; Scale index to Word\r
+ 0BE1 8B B7 0006 R MOV SI, PAGE_ADDR[BX] ; Offset to Source Page\r
+ \r
+ 0BE5 8B 0E 000E R MOV CX, PAGE_SIZE ; Get size of Page\r
+ 0BE9 A1 0016 R MOV AX, CURRENT_SEGMENT ; Get Video Mem Segment\r
+ 0BEC 8E C0 MOV ES, AX ; ES:DI -> Dest Page\r
+ 0BEE 8E D8 MOV DS, AX ; DS:SI -> Source Page\r
+ \r
+ ; Setup VGA registers for Mem to Mem copy\r
+ \r
+ OUT_16 GC_Index, LATCHES_ON ; Data from Latches = on\r
+ 0BF0 BA 03CE 1 MOV DX, GC_Index ; then Select Register\r
+ 0BF3 B8 0008 1 MOV AX, LATCHES_ON ; then Get Data Value\r
+ 0BF6 EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ OUT_16 SC_Index, ALL_PLANES_ON ; Copy all Planes\r
+ 0BF7 BA 03C4 1 MOV DX, SC_Index ; then Select Register\r
+ 0BFA B8 0F02 1 MOV AX, ALL_PLANES_ON ; then Get Data Value\r
+ 0BFD EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ \r
+ ; Note.. Do *NOT* use MOVSW or MOVSD - they will\r
+ ; Screw with the latches which are 8 bits x 4\r
+ \r
+ 0BFE F3/ A4 REP MOVSB ; Copy entire Page!\r
+ \r
+ ; Reset VGA for normal memory access\r
+ \r
+ OUT_16 GC_Index, LATCHES_OFF ; Data from Latches = off\r
+ 0C00 BA 03CE 1 MOV DX, GC_Index ; then Select Register\r
+ 0C03 B8 FF08 1 MOV AX, LATCHES_OFF ; then Get Data Value\r
+ 0C06 EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ \r
+ 0C07 @CP_Exit:\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 0C07 5F 1 POP DI ; Restore R1\r
+ 0C08 5E 2 POP SI ; Restore R1\r
+ 0C09 1F 3 POP DS ; Restore R1\r
+ 0C0A 5D 4 POP BP ; Restore R1\r
+ 0C0B CA 0004 RET 4 ; Exit and Clean up Stack\r
+ \r
+ 0C0E COPY_PAGE ENDP\r
+ \r
+ \r
+ ;==========================================================================\r
+ ;COPY_BITMAP (SourcePage%, X1%, Y1%, X2%, Y2%, DestPage%, DestX1%, DestY1%)\r
+ ;==========================================================================\r
+ ;\r
+ ; Copies a Bitmap Image from one Display Page to Another\r
+ ; This Routine is Limited to copying Images with the same\r
+ ; Plane Alignment. To Work: (X1 MOD 4) must = (DestX1 MOD 4)\r
+ ; Copying an Image to the Same Page is supported, but results\r
+ ; may be defined when the when the rectangular areas\r
+ ; (X1, Y1) - (X2, Y2) and (DestX1, DestY1) -\r
+ ; (DestX1+(X2-X1), DestY1+(Y2-Y1)) overlap...\r
+ ; No Paramter checking to done to insure that\r
+ ; X2 >= X1 and Y2 >= Y1. Be Careful...\r
+ ;\r
+ ; ENTRY: SourcePage = Display Page # with Source Image\r
+ ; X1 = Upper Left Xpos of Source Image\r
+ ; Y1 = Upper Left Ypos of Source Image\r
+ ; X2 = Lower Right Xpos of Source Image\r
+ ; Y2 = Lower Right Ypos of Source Image\r
+ ; DestPage = Display Page # to copy Image to\r
+ ; DestX1 = Xpos to Copy UL Corner of Image to\r
+ ; DestY1 = Ypos to Copy UL Corner of Image to\r
+ ;\r
+ ; EXIT: AX = Success Flag: 0 = Failure / -1= Success\r
+ ;\r
+ \r
+ 0020 CB_STACK STRUC\r
+ 0000 0000 CB_Height DW ? ; Height of Image in Lines\r
+ 0002 0000 CB_Width DW ? ; Width of Image in "bands"\r
+ 0004 0000 0000 0000 DW ?x4 ; DI, SI, DS, BP\r
+ 0000\r
+ 000C 00000000 DD ? ; Caller\r
+ 0010 0000 CB_DestY1 DW ? ; Destination Ypos\r
+ 0012 0000 CB_DestX1 DW ? ; Destination Xpos\r
+ 0014 0000 CB_DestP DW ? ; Page to Copy Bitmap To\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 14 - 1\r
+\r
+\r
+ 0016 0000 CB_Y2 DW ? ; LR Ypos of Image\r
+ 0018 0000 CB_X2 DW ? ; LR Xpos of Image\r
+ 001A 0000 CB_Y1 DW ? ; UL Ypos of Image\r
+ 001C 0000 CB_X1 DW ? ; UL Xpos of Image\r
+ 001E 0000 CB_SourceP DW ? ; Page containing Source Bitmap\r
+ CB_STACK ENDS\r
+ \r
+ PUBLIC COPY_BITMAP\r
+ \r
+ 0C0E COPY_BITMAP PROC FAR\r
+ \r
+ PUSHx BP, DS, SI, DI ; Preserve Important Registers\r
+ 0C0E 55 1 PUSH BP ; Save R1\r
+ 0C0F 1E 2 PUSH DS ; Save R1\r
+ 0C10 56 3 PUSH SI ; Save R1\r
+ 0C11 57 4 PUSH DI ; Save R1\r
+ 0C12 83 EC 04 SUB SP, 4 ; Allocate WorkSpace on Stack\r
+ 0C15 8B EC MOV BP, SP ; Set up Stack Frame\r
+ \r
+ ; Prep Registers (and keep jumps short!)\r
+ \r
+ 0C17 8E 06 0016 R MOV ES, CURRENT_SEGMENT ; ES -> VGA Ram\r
+ 0C1B FC CLD ; Block Xfer Forwards\r
+ \r
+ ; Make sure Parameters are valid\r
+ \r
+ 0C1C 8B 5E 1E MOV BX, [BP].CB_SourceP ; Get Source Page #\r
+ 0C1F 3B 1E 0004 R CMP BX, LAST_PAGE ; is it > Max Page #?\r
+ 0C23 73 7D JAE @CB_Abort ; if so, abort\r
+ \r
+ 0C25 8B 4E 14 MOV CX, [BP].CB_DestP ; Get Destination Page #\r
+ 0C28 3B 0E 0004 R CMP CX, LAST_PAGE ; is it > Max Page #?\r
+ 0C2C 73 74 JAE @CB_Abort ; if so, abort\r
+ \r
+ 0C2E 8B 46 1C MOV AX, [BP].CB_X1 ; Get Source X1\r
+ 0C31 33 46 12 XOR AX, [BP].CB_DestX1 ; Compare Bits 0-1\r
+ 0C34 83 E0 03 AND AX, PLANE_BITS ; Check Plane Bits\r
+ 0C37 75 69 JNZ @CB_Abort ; They should cancel out\r
+ \r
+ ; Setup for Copy processing\r
+ \r
+ OUT_8 SC_INDEX, MAP_MASK ; Set up for Plane Select\r
+ 0C39 BA 03C4 1 MOV DX, SC_INDEX ; then Select Register\r
+ 0C3C B0 02 1 MOV AL, MAP_MASK ; then Get Data Value\r
+ 0C3E EE 1 OUT DX, AL ; Set I/O Register\r
+ OUT_16 GC_Index, LATCHES_ON ; Data from Latches = on\r
+ 0C3F BA 03CE 1 MOV DX, GC_Index ; then Select Register\r
+ 0C42 B8 0008 1 MOV AX, LATCHES_ON ; then Get Data Value\r
+ 0C45 EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ \r
+ ; Compute Info About Images, Setup ES:SI & ES:DI\r
+ \r
+ 0C46 8B 46 16 MOV AX, [BP].CB_Y2 ; Height of Bitmap in lines\r
+ 0C49 2B 46 1A SUB AX, [BP].CB_Y1 ; is Y2 - Y1 + 1\r
+ 0C4C 40 INC AX ; (add 1 since were not 0 based)\r
+ 0C4D 89 46 00 MOV [BP].CB_Height, AX ; Save on Stack for later use\r
+ \r
+ 0C50 8B 46 18 MOV AX, [BP].CB_X2 ; Get # of "Bands" of 4 Pixels\r
+ 0C53 8B 56 1C MOV DX, [BP].CB_X1 ; the Bitmap Occupies as X2-X1\r
+ 0C56 C1 E8 02 SHR AX, 2 ; Get X2 Band (X2 / 4)\r
+ 0C59 C1 EA 02 SHR DX, 2 ; Get X1 Band (X1 / 4)\r
+ 0C5C 2B C2 SUB AX, DX ; AX = # of Bands - 1\r
+ 0C5E 40 INC AX ; AX = # of Bands\r
+ 0C5F 89 46 02 MOV [BP].CB_Width, AX ; Save on Stack for later use\r
+ \r
+ 0C62 D1 E3 SHL BX, 1 ; Scale Source Page to Word\r
+ 0C64 8B B7 0006 R MOV SI, PAGE_ADDR[BX] ; SI = Offset of Source Page\r
+ 0C68 8B 46 1A MOV AX, [BP].CB_Y1 ; Get Source Y1 Line\r
+ 0C6B F7 26 0000 R MUL SCREEN_WIDTH ; AX = Offset to Line Y1\r
+ 0C6F 03 F0 ADD SI, AX ; SI = Offset to Line Y1\r
+ 0C71 8B 46 1C MOV AX, [BP].CB_X1 ; Get Source X1\r
+ 0C74 C1 E8 02 SHR AX, 2 ; X1 / 4 = Byte offset\r
+ 0C77 03 F0 ADD SI, AX ; SI = Byte Offset to (X1,Y1)\r
+ \r
+ 0C79 8B D9 MOV BX, CX ; Dest Page Index to BX\r
+ 0C7B D1 E3 SHL BX, 1 ; Scale Source Page to Word\r
+ 0C7D 8B BF 0006 R MOV DI, PAGE_ADDR[BX] ; DI = Offset of Dest Page\r
+ 0C81 8B 46 10 MOV AX, [BP].CB_DestY1 ; Get Dest Y1 Line\r
+ 0C84 F7 26 0000 R MUL SCREEN_WIDTH ; AX = Offset to Line Y1\r
+ 0C88 03 F8 ADD DI, AX ; DI = Offset to Line Y1\r
+ 0C8A 8B 46 12 MOV AX, [BP].CB_DestX1 ; Get Dest X1\r
+ 0C8D C1 E8 02 SHR AX, 2 ; X1 / 4 = Byte offset\r
+ 0C90 03 F8 ADD DI, AX ; DI = Byte Offset to (D-X1,D-Y1)\r
+ \r
+ 0C92 8B 4E 02 MOV CX, [BP].CB_Width ; CX = Width of Image (Bands)\r
+ 0C95 49 DEC CX ; CX = 1?\r
+ 0C96 74 0F JE @CB_Only_One_Band ; 0 Means Image Width of 1 Band\r
+ \r
+ 0C98 8B 5E 1C MOV BX, [BP].CB_X1 ; Get Source X1\r
+ 0C9B 83 E3 03 AND BX, PLANE_BITS ; Aligned? (bits 0-1 = 00?)\r
+ 0C9E 74 70 JZ @CB_Check_Right ; if so, check right alignment\r
+ 0CA0 75 41 JNZ @CB_Left_Band ; not aligned? well..\r
+ \r
+ 0CA2 @CB_Abort:\r
+ CLR AX ; Return False (Failure)\r
+ 0CA2 33 C0 1 XOR AX, AX ; Set Register = 0\r
+ 0CA4 E9 00D7 JMP @CB_Exit ; and Finish Up\r
+ \r
+ ; Copy when Left & Right Clip Masks overlap...\r
+ \r
+ 0CA7 @CB_Only_One_Band:\r
+ 0CA7 8B 5E 1C MOV BX, [BP].CB_X1 ; Get Left Clip Mask\r
+ 0CAA 83 E3 03 AND BX, PLANE_BITS ; Mask out Row #\r
+ 0CAD 2E: 8A 87 0000 R MOV AL, Left_Clip_Mask[BX] ; Get Left Edge Mask\r
+ 0CB2 8B 5E 18 MOV BX, [BP].CB_X2 ; Get Right Clip Mask\r
+ 0CB5 83 E3 03 AND BX, PLANE_BITS ; Mask out Row #\r
+ 0CB8 2E: 22 87 0004 R AND AL, Right_Clip_Mask[BX] ; Get Right Edge Mask byte\r
+ \r
+ OUT_8 SC_Data, AL ; Clip For Left & Right Masks\r
+ 0CBD BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 0CC0 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0CC1 8B 4E 00 MOV CX, [BP].CB_Height ; CX = # of Lines to Copy\r
+ 0CC4 8B 16 0000 R MOV DX, SCREEN_WIDTH ; DX = Width of Screen\r
+ CLR BX ; BX = Offset into Image\r
+ 0CC8 33 DB 1 XOR BX, BX ; Set Register = 0\r
+ \r
+ 0CCA @CB_One_Loop:\r
+ 0CCA 26: 8A 00 MOV AL, ES:[SI+BX] ; Load Latches\r
+ 0CCD 26: 88 01 MOV ES:[DI+BX], AL ; Unload Latches\r
+ 0CD0 03 DA ADD BX, DX ; Advance Offset to Next Line\r
+ LOOPjz CX, @CB_One_Done ; Exit Loop if Finished\r
+ 0CD2 49 1 DEC CX ; Counter--\r
+ 0CD3 74 0B 1 JZ @CB_One_Done ; Jump if 0\r
+ \r
+ 0CD5 26: 8A 00 MOV AL, ES:[SI+BX] ; Load Latches\r
+ 0CD8 26: 88 01 MOV ES:[DI+BX], AL ; Unload Latches\r
+ 0CDB 03 DA ADD BX, DX ; Advance Offset to Next Line\r
+ LOOPx CX, @CB_One_Loop ; Loop until Finished\r
+ 0CDD 49 1 DEC CX ; Counter--\r
+ 0CDE 75 EA 1 JNZ @CB_One_Loop ; Jump if not 0\r
+ \r
+ 0CE0 @CB_One_Done:\r
+ 0CE0 E9 0094 JMP @CB_Finish ; Outa Here!\r
+ \r
+ ; Copy Left Edge of Bitmap\r
+ \r
+ 0CE3 @CB_Left_Band:\r
+ \r
+ OUT_8 SC_Data, Left_Clip_Mask[BX] ; Set Left Edge Plane Mask\r
+ 0CE3 BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 0CE6 2E: 8A 87 0000 R 1 MOV AL, Left_Clip_Mask[BX] ; then Get Data Value\r
+ 0CEB EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0CEC 8B 4E 00 MOV CX, [BP].CB_Height ; CX = # of Lines to Copy\r
+ 0CEF 8B 16 0000 R MOV DX, SCREEN_WIDTH ; DX = Width of Screen\r
+ CLR BX ; BX = Offset into Image\r
+ 0CF3 33 DB 1 XOR BX, BX ; Set Register = 0\r
+ \r
+ 0CF5 @CB_Left_Loop:\r
+ 0CF5 26: 8A 00 MOV AL, ES:[SI+BX] ; Load Latches\r
+ 0CF8 26: 88 01 MOV ES:[DI+BX], AL ; Unload Latches\r
+ 0CFB 03 DA ADD BX, DX ; Advance Offset to Next Line\r
+ LOOPjz CX, @CB_Left_Done ; Exit Loop if Finished\r
+ 0CFD 49 1 DEC CX ; Counter--\r
+ 0CFE 74 0B 1 JZ @CB_Left_Done ; Jump if 0\r
+ \r
+ 0D00 26: 8A 00 MOV AL, ES:[SI+BX] ; Load Latches\r
+ 0D03 26: 88 01 MOV ES:[DI+BX], AL ; Unload Latches\r
+ 0D06 03 DA ADD BX, DX ; Advance Offset to Next Line\r
+ LOOPx CX, @CB_Left_Loop ; Loop until Finished\r
+ 0D08 49 1 DEC CX ; Counter--\r
+ 0D09 75 EA 1 JNZ @CB_Left_Loop ; Jump if not 0\r
+ \r
+ 0D0B @CB_Left_Done:\r
+ 0D0B 47 INC DI ; Move Dest Over 1 band\r
+ 0D0C 46 INC SI ; Move Source Over 1 band\r
+ 0D0D FF 4E 02 DEC [BP].CB_Width ; Band Width--\r
+ \r
+ ; Determine if Right Edge of Bitmap needs special copy\r
+ \r
+ 0D10 @CB_Check_Right:\r
+ 0D10 8B 5E 18 MOV BX, [BP].CB_X2 ; Get Source X2\r
+ 0D13 83 E3 03 AND BX, PLANE_BITS ; Aligned? (bits 0-1 = 11?)\r
+ 0D16 80 FB 03 CMP BL, 03h ; Plane = 3?\r
+ 0D19 74 2C JE @CB_Copy_Middle ; Copy the Middle then!\r
+ \r
+ ; Copy Right Edge of Bitmap\r
+ \r
+ 0D1B @CB_Right_Band:\r
+ \r
+ OUT_8 SC_Data, Right_Clip_Mask[BX] ; Set Right Edge Plane Mask\r
+ 0D1B BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 0D1E 2E: 8A 87 0004 R 1 MOV AL, Right_Clip_Mask[BX] ; then Get Data Value\r
+ 0D23 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0D24 FF 4E 02 DEC [BP].CB_Width ; Band Width--\r
+ 0D27 8B 4E 00 MOV CX, [BP].CB_Height ; CX = # of Lines to Copy\r
+ 0D2A 8B 16 0000 R MOV DX, SCREEN_WIDTH ; DX = Width of Screen\r
+ 0D2E 8B 5E 02 MOV BX, [BP].CB_Width ; BX = Offset to Right Edge\r
+ \r
+ 0D31 @CB_Right_Loop:\r
+ 0D31 26: 8A 00 MOV AL, ES:[SI+BX] ; Load Latches\r
+ 0D34 26: 88 01 MOV ES:[DI+BX], AL ; Unload Latches\r
+ 0D37 03 DA ADD BX, DX ; Advance Offset to Next Line\r
+ LOOPjz CX, @CB_Right_Done ; Exit Loop if Finished\r
+ 0D39 49 1 DEC CX ; Counter--\r
+ 0D3A 74 0B 1 JZ @CB_Right_Done ; Jump if 0\r
+ \r
+ 0D3C 26: 8A 00 MOV AL, ES:[SI+BX] ; Load Latches\r
+ 0D3F 26: 88 01 MOV ES:[DI+BX], AL ; Unload Latches\r
+ 0D42 03 DA ADD BX, DX ; Advance Offset to Next Line\r
+ LOOPx CX, @CB_Right_Loop ; Loop until Finished\r
+ 0D44 49 1 DEC CX ; Counter--\r
+ 0D45 75 EA 1 JNZ @CB_Right_Loop ; Jump if not 0\r
+ \r
+ 0D47 @CB_Right_Done:\r
+ \r
+ ; Copy the Main Block of the Bitmap\r
+ \r
+ 0D47 @CB_Copy_Middle:\r
+ \r
+ 0D47 8B 4E 02 MOV CX, [BP].CB_Width ; Get Width Remaining\r
+ 0D4A E3 2B JCXZ @CB_Finish ; Exit if Done\r
+ \r
+ OUT_8 SC_Data, ALL_PLANES ; Copy all Planes\r
+ 0D4C BA 03C5 1 MOV DX, SC_Data ; then Select Register\r
+ 0D4F B0 0F 1 MOV AL, ALL_PLANES ; then Get Data Value\r
+ 0D51 EE 1 OUT DX, AL ; Set I/O Register\r
+ \r
+ 0D52 8B 16 0000 R MOV DX, SCREEN_WIDTH ; Get Width of Screen minus\r
+ 0D56 2B D1 SUB DX, CX ; Image width (for Adjustment)\r
+ 0D58 8B 46 00 MOV AX, [BP].CB_Height ; AX = # of Lines to Copy\r
+ 0D5B 8B D9 MOV BX, CX ; BX = Quick REP reload count\r
+ 0D5D 8C C1 MOV CX, ES ; Move VGA Segment\r
+ 0D5F 8E D9 MOV DS, CX ; Into DS\r
+ \r
+ ; Actual Copy Loop. REP MOVSB does the work\r
+ \r
+ 0D61 @CB_Middle_Copy:\r
+ 0D61 8B CB MOV CX, BX ; Recharge Rep Count\r
+ 0D63 F3/ A4 REP MOVSB ; Move Bands\r
+ LOOPjz AX, @CB_Finish ; Exit Loop if Finished\r
+ 0D65 48 1 DEC AX ; Counter--\r
+ 0D66 74 0F 1 JZ @CB_Finish ; Jump if 0\r
+ \r
+ 0D68 03 F2 ADD SI, DX ; Adjust DS:SI to Next Line\r
+ 0D6A 03 FA ADD DI, DX ; Adjust ES:DI to Next Line\r
+ \r
+ 0D6C 8B CB MOV CX, BX ; Recharge Rep Count\r
+ 0D6E F3/ A4 REP MOVSB ; Move Bands\r
+ \r
+ 0D70 03 F2 ADD SI, DX ; Adjust DS:SI to Next Line\r
+ 0D72 03 FA ADD DI, DX ; Adjust ES:DI to Next Line\r
+ LOOPx AX, @CB_Middle_Copy ; Copy Lines until Done\r
+ 0D74 48 1 DEC AX ; Counter--\r
+ 0D75 75 EA 1 JNZ @CB_Middle_Copy ; Jump if not 0\r
+ \r
+ 0D77 @CB_Finish:\r
+ OUT_16 GC_Index, LATCHES_OFF ; Data from Latches = on\r
+ 0D77 BA 03CE 1 MOV DX, GC_Index ; then Select Register\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Page 15 - 1\r
+\r
+\r
+ 0D7A B8 FF08 1 MOV AX, LATCHES_OFF ; then Get Data Value\r
+ 0D7D EF 1 OUT DX, AX ; Set I/O Register(s)\r
+ \r
+ 0D7E @CB_Exit:\r
+ 0D7E 83 C4 04 ADD SP, 04 ; Deallocate stack workspace\r
+ POPx DI, SI, DS, BP ; Restore Saved Registers\r
+ 0D81 5F 1 POP DI ; Restore R1\r
+ 0D82 5E 2 POP SI ; Restore R1\r
+ 0D83 1F 3 POP DS ; Restore R1\r
+ 0D84 5D 4 POP BP ; Restore R1\r
+ 0D85 CA 0010 RET 16 ; Exit and Clean up Stack\r
+ \r
+ 0D88 COPY_BITMAP ENDP\r
+ \r
+ END ; End of Code Segment\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Symbols 16 - 1\r
+\r
+\r
+\r
+\r
+Macros:\r
+\r
+ N a m e Type\r
+\r
+CLR . . . . . . . . . . . . . . Proc\r
+LOOPjz . . . . . . . . . . . . . Proc\r
+LOOPx . . . . . . . . . . . . . Proc\r
+OUT_16 . . . . . . . . . . . . . Proc\r
+OUT_8 . . . . . . . . . . . . . Proc\r
+POPx . . . . . . . . . . . . . . Proc\r
+PUSHx . . . . . . . . . . . . . Proc\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Symbols 17 - 1\r
+\r
+\r
+\r
+\r
+Structures and Unions:\r
+\r
+ N a m e Size\r
+ Offset Type\r
+\r
+CB_STACK . . . . . . . . . . . . 0020\r
+ CB_Height . . . . . . . . . . 0000 Word\r
+ CB_Width . . . . . . . . . . . 0002 Word\r
+ CB_DestY1 . . . . . . . . . . 0010 Word\r
+ CB_DestX1 . . . . . . . . . . 0012 Word\r
+ CB_DestP . . . . . . . . . . . 0014 Word\r
+ CB_Y2 . . . . . . . . . . . . 0016 Word\r
+ CB_X2 . . . . . . . . . . . . 0018 Word\r
+ CB_Y1 . . . . . . . . . . . . 001A Word\r
+ CB_X1 . . . . . . . . . . . . 001C Word\r
+ CB_SourceP . . . . . . . . . . 001E Word\r
+CP_STACK . . . . . . . . . . . . 0010\r
+ CP_DestP . . . . . . . . . . . 000C Word\r
+ CP_SourceP . . . . . . . . . . 000E Word\r
+CVS_STACK . . . . . . . . . . . 000A\r
+ CVS_COLOR . . . . . . . . . . 0008 Byte\r
+DB_STACK . . . . . . . . . . . . 0022\r
+ DB_LineO . . . . . . . . . . . 0000 Word\r
+ DB_PixCount . . . . . . . . . 0002 Word\r
+ DB_Start . . . . . . . . . . . 0004 Word\r
+ DB_PixSkew . . . . . . . . . . 0006 Word\r
+ DB_SkewFlag . . . . . . . . . 0008 Word\r
+ DB_Height . . . . . . . . . . 0016 Word\r
+ DB_Width . . . . . . . . . . . 0018 Word\r
+ DB_Ypos . . . . . . . . . . . 001A Word\r
+ DB_Xpos . . . . . . . . . . . 001C Word\r
+ DB_Image . . . . . . . . . . . 001E DWord\r
+DL_STACK . . . . . . . . . . . . 0014\r
+ DL_ColorF . . . . . . . . . . 000A Byte\r
+ DL_Ypos2 . . . . . . . . . . . 000C Word\r
+ DL_Xpos2 . . . . . . . . . . . 000E Word\r
+ DL_Ypos1 . . . . . . . . . . . 0010 Word\r
+ DL_Xpos1 . . . . . . . . . . . 0012 Word\r
+FB_STACK . . . . . . . . . . . . 0016\r
+ FB_Color . . . . . . . . . . . 000C Byte\r
+ FB_Ypos2 . . . . . . . . . . . 000E Word\r
+ FB_Xpos2 . . . . . . . . . . . 0010 Word\r
+ FB_Ypos1 . . . . . . . . . . . 0012 Word\r
+ FB_Xpos1 . . . . . . . . . . . 0014 Word\r
+GDR_STACK . . . . . . . . . . . 000E\r
+ GDR_Blue . . . . . . . . . . . 0006 Word\r
+ GDR_Green . . . . . . . . . . 0008 Word\r
+ GDR_Red . . . . . . . . . . . 000A Word\r
+ GDR_Register . . . . . . . . . 000C Byte\r
+GPC_STACK . . . . . . . . . . . 001E\r
+ GPC_Width . . . . . . . . . . 0000 Word\r
+ GPC_Lines . . . . . . . . . . 0002 Byte\r
+ GPC_T_SETS . . . . . . . . . . 0004 Word\r
+ GPC_T_SETO . . . . . . . . . . 0006 Word\r
+ GPC_ColorB . . . . . . . . . . 0014 Byte\r
+ GPC_ColorF . . . . . . . . . . 0016 Byte\r
+ GPC_Ypos . . . . . . . . . . . 0018 Word\r
+ GPC_Xpos . . . . . . . . . . . 001A Word\r
+ GPC_Char . . . . . . . . . . . 001C Byte\r
+LDR_STACK . . . . . . . . . . . 0014\r
+ LDR_Sync . . . . . . . . . . . 000A Word\r
+ LDR_EndReg . . . . . . . . . . 000C Byte\r
+ LDR_StartReg . . . . . . . . . 000E Byte\r
+ LDR_PalData . . . . . . . . . 0010 DWord\r
+Mode_Data_Table . . . . . . . . 000C\r
+ M_MiscR . . . . . . . . . . . 0000 Byte\r
+ M_Pages . . . . . . . . . . . 0001 Byte\r
+ M_XSize . . . . . . . . . . . 0002 Word\r
+ M_YSize . . . . . . . . . . . 0004 Word\r
+ M_XMax . . . . . . . . . . . . 0006 Word\r
+ M_YMax . . . . . . . . . . . . 0008 Word\r
+ M_CRTC . . . . . . . . . . . . 000A Word\r
+PS_STACK . . . . . . . . . . . . 001A\r
+ PS_ColorB . . . . . . . . . . 000C Word\r
+ PS_ColorF . . . . . . . . . . 000E Word\r
+ PS_Ypos . . . . . . . . . . . 0010 Word\r
+ PS_Xpos . . . . . . . . . . . 0012 Word\r
+ PS_Len . . . . . . . . . . . . 0014 Word\r
+ PS_Text . . . . . . . . . . . 0016 Word\r
+RDR_STACK . . . . . . . . . . . 0012\r
+ RDR_EndReg . . . . . . . . . . 000A Byte\r
+ RDR_StartReg . . . . . . . . . 000C Byte\r
+ RDR_PalData . . . . . . . . . 000E DWord\r
+RP_STACK . . . . . . . . . . . . 000C\r
+ RP_Ypos . . . . . . . . . . . 0008 Word\r
+ RP_Xpos . . . . . . . . . . . 000A Word\r
+SAP_STACK . . . . . . . . . . . 0008\r
+ SAP_Page . . . . . . . . . . . 0006 Word\r
+SDF_STACK . . . . . . . . . . . 000C\r
+ SDF_Which . . . . . . . . . . 0006 Word\r
+ SDF_Font . . . . . . . . . . . 0008 DWord\r
+SDP_STACK . . . . . . . . . . . 0008\r
+ SDP_Page . . . . . . . . . . . 0006 Word\r
+SDR_STACK . . . . . . . . . . . 000E\r
+ SDR_Blue . . . . . . . . . . . 0006 Byte\r
+ SDR_Green . . . . . . . . . . 0008 Byte\r
+ SDR_Red . . . . . . . . . . . 000A Byte\r
+ SDR_Register . . . . . . . . . 000C Byte\r
+SM_STACK . . . . . . . . . . . . 000A\r
+ SM_Mode . . . . . . . . . . . 0008 Word\r
+SP_STACK . . . . . . . . . . . . 000E\r
+ SETP_Color . . . . . . . . . . 0008 Byte\r
+ SETP_Ypos . . . . . . . . . . 000A Word\r
+ SETP_Xpos . . . . . . . . . . 000C Word\r
+SVM_STACK . . . . . . . . . . . 0016\r
+ SVM_Table . . . . . . . . . . 0000 Word\r
+ SVM_Pages . . . . . . . . . . 000E Word\r
+ SVM_Ysize . . . . . . . . . . 0010 Word\r
+ SVM_Xsize . . . . . . . . . . 0012 Word\r
+ SVM_Mode . . . . . . . . . . . 0014 Word\r
+SW_STACK . . . . . . . . . . . . 000C\r
+ SW_Ypos . . . . . . . . . . . 0006 Word\r
+ SW_Xpos . . . . . . . . . . . 0008 Word\r
+ SW_Page . . . . . . . . . . . 000A Word\r
+TB_STACK . . . . . . . . . . . . 0022\r
+ TB_LineO . . . . . . . . . . . 0000 Word\r
+ TB_PixCount . . . . . . . . . 0002 Word\r
+ TB_Start . . . . . . . . . . . 0004 Word\r
+ TB_PixSkew . . . . . . . . . . 0006 Word\r
+ TB_SkewFlag . . . . . . . . . 0008 Word\r
+ TB_Height . . . . . . . . . . 0016 Word\r
+ TB_Width . . . . . . . . . . . 0018 Word\r
+ TB_Ypos . . . . . . . . . . . 001A Word\r
+ TB_Xpos . . . . . . . . . . . 001C Word\r
+ TB_Image . . . . . . . . . . . 001E DWord\r
+TGP_STACK . . . . . . . . . . . 001C\r
+ TGP_Width . . . . . . . . . . 0000 Word\r
+ TGP_Lines . . . . . . . . . . 0002 Byte\r
+ TGP_T_SETS . . . . . . . . . . 0004 Word\r
+ TGP_T_SETO . . . . . . . . . . 0006 Word\r
+ TGP_ColorF . . . . . . . . . . 0014 Byte\r
+ TGP_Ypos . . . . . . . . . . . 0016 Word\r
+ TGP_Xpos . . . . . . . . . . . 0018 Word\r
+ TGP_Char . . . . . . . . . . . 001A Byte\r
+TPS_STACK . . . . . . . . . . . 0018\r
+ TPS_ColorF . . . . . . . . . . 000C Word\r
+ TPS_Ypos . . . . . . . . . . . 000E Word\r
+ TPS_Xpos . . . . . . . . . . . 0010 Word\r
+ TPS_Len . . . . . . . . . . . 0012 Word\r
+ TPS_Text . . . . . . . . . . . 0014 Word\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Symbols 18 - 1\r
+\r
+\r
+\r
+\r
+Segments and Groups:\r
+\r
+ N a m e Size Length Align Combine Class\r
+\r
+DGROUP . . . . . . . . . . . . . GROUP\r
+_DATA . . . . . . . . . . . . . 16 Bit 0000 Word Public 'DATA' \r
+_BSS . . . . . . . . . . . . . . 16 Bit 002A Word Public 'BSS' \r
+MODEX_TEXT . . . . . . . . . . . 16 Bit 0D88 Word Public 'CODE' \r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Symbols 19 - 1\r
+\r
+\r
+\r
+\r
+Procedures, parameters and locals:\r
+\r
+ N a m e Type Value Attr\r
+\r
+CLEAR_VGA_SCREEN . . . . . . . . P Far 0280 MODEX_TEXT Length= 0022 Public\r
+COPY_BITMAP . . . . . . . . . . P Far 0C0E MODEX_TEXT Length= 017E Public\r
+COPY_PAGE . . . . . . . . . . . P Far 0BBA MODEX_TEXT Length= 0054 Public\r
+DRAW_BITMAP . . . . . . . . . . P Far 0A0F MODEX_TEXT Length= 00BC Public\r
+DRAW_LINE . . . . . . . . . . . P Far 040B MODEX_TEXT Length= 02A7 Public\r
+FILL_BLOCK . . . . . . . . . . . P Far 0300 MODEX_TEXT Length= 010B Public\r
+GET_ACTIVE_PAGE . . . . . . . . P Far 06E5 MODEX_TEXT Length= 0004 Public\r
+GET_DAC_REGISTER . . . . . . . . P Far 0641 MODEX_TEXT Length= 0025 Public\r
+GET_DISPLAY_PAGE . . . . . . . . P Far 0724 MODEX_TEXT Length= 0004 Public\r
+GET_X_OFFSET . . . . . . . . . . P Far 078D MODEX_TEXT Length= 0004 Public\r
+GET_Y_OFFSET . . . . . . . . . . P Far 0791 MODEX_TEXT Length= 0004 Public\r
+GPRINTC . . . . . . . . . . . . P Far 07A3 MODEX_TEXT Length= 00FE Public\r
+LOAD_DAC_REGISTERS . . . . . . . P Far 0666 MODEX_TEXT Length= 0037 Public\r
+PRINT_STR . . . . . . . . . . . P Far 0975 MODEX_TEXT Length= 0041 Public\r
+READ_DAC_REGISTERS . . . . . . . P Far 069D MODEX_TEXT Length= 002B Public\r
+READ_POINT . . . . . . . . . . . P Far 02D2 MODEX_TEXT Length= 002E Public\r
+SET_ACTIVE_PAGE . . . . . . . . P Far 06C8 MODEX_TEXT Length= 001D Public\r
+SET_DAC_REGISTER . . . . . . . . P Far 0624 MODEX_TEXT Length= 001D Public\r
+SET_DISPLAY_FONT . . . . . . . . P Far 09F3 MODEX_TEXT Length= 001C Public\r
+SET_DISPLAY_PAGE . . . . . . . . P Far 06E9 MODEX_TEXT Length= 003B Public\r
+SET_MODEX . . . . . . . . . . . P Far 0251 MODEX_TEXT Length= 002F Public\r
+SET_POINT . . . . . . . . . . . P Far 02A2 MODEX_TEXT Length= 0030 Public\r
+SET_VGA_MODEX . . . . . . . . . P Far 0104 MODEX_TEXT Length= 014D Public\r
+SET_WINDOW . . . . . . . . . . . P Far 0728 MODEX_TEXT Length= 0065 Public\r
+SYNC_DISPLAY . . . . . . . . . . P Far 0795 MODEX_TEXT Length= 000E Public\r
+TDRAW_BITMAP . . . . . . . . . . P Far 0ACB MODEX_TEXT Length= 00EF Public\r
+TGPRINTC . . . . . . . . . . . . P Far 08A1 MODEX_TEXT Length= 00D4 Public\r
+TPRINT_STR . . . . . . . . . . . P Far 09B6 MODEX_TEXT Length= 003D Public\r
+\fMicrosoft (R) Macro Assembler Version 6.11 07/02/14 15:18:33\r
+modex.asm Symbols 20 - 1\r
+\r
+\r
+\r
+\r
+Symbols:\r
+\r
+ N a m e Type Value Attr\r
+\r
+?x3 . . . . . . . . . . . . . . Text ?,?,?\r
+?x4 . . . . . . . . . . . . . . Text ?,?,?,?\r
+@CB_Abort . . . . . . . . . . . L Near 0CA2 MODEX_TEXT \r
+@CB_Check_Right . . . . . . . . L Near 0D10 MODEX_TEXT \r
+@CB_Copy_Middle . . . . . . . . L Near 0D47 MODEX_TEXT \r
+@CB_Exit . . . . . . . . . . . . L Near 0D7E MODEX_TEXT \r
+@CB_Finish . . . . . . . . . . . L Near 0D77 MODEX_TEXT \r
+@CB_Left_Band . . . . . . . . . L Near 0CE3 MODEX_TEXT \r
+@CB_Left_Done . . . . . . . . . L Near 0D0B MODEX_TEXT \r
+@CB_Left_Loop . . . . . . . . . L Near 0CF5 MODEX_TEXT \r
+@CB_Middle_Copy . . . . . . . . L Near 0D61 MODEX_TEXT \r
+@CB_One_Done . . . . . . . . . . L Near 0CE0 MODEX_TEXT \r
+@CB_One_Loop . . . . . . . . . . L Near 0CCA MODEX_TEXT \r
+@CB_Only_One_Band . . . . . . . L Near 0CA7 MODEX_TEXT \r
+@CB_Right_Band . . . . . . . . . L Near 0D1B MODEX_TEXT \r
+@CB_Right_Done . . . . . . . . . L Near 0D47 MODEX_TEXT \r
+@CB_Right_Loop . . . . . . . . . L Near 0D31 MODEX_TEXT \r
+@CP_Exit . . . . . . . . . . . . L Near 0C07 MODEX_TEXT \r
+@CodeSize . . . . . . . . . . . Number 0001h \r
+@DB_COPY2 . . . . . . . . . . . L Near 0A8A MODEX_TEXT \r
+@DB_COPY_LINE . . . . . . . . . L Near 0A68 MODEX_TEXT \r
+@DB_COPY_LOOP . . . . . . . . . L Near 0A70 MODEX_TEXT \r
+@DB_COPY_PLANE . . . . . . . . . L Near 0A5F MODEX_TEXT \r
+@DB_COPY_REMAINDER . . . . . . . L Near 0A88 MODEX_TEXT \r
+@DB_Exit . . . . . . . . . . . . L Near 0AC1 MODEX_TEXT \r
+@DB_NEXT2 . . . . . . . . . . . L Near 0A99 MODEX_TEXT \r
+@DB_NEXT_LINE . . . . . . . . . L Near 0A91 MODEX_TEXT \r
+@DL_BREZHAM . . . . . . . . . . L Near 04C7 MODEX_TEXT \r
+@DL_DeltaYOK2 . . . . . . . . . L Near 0515 MODEX_TEXT \r
+@DL_DeltaYOK . . . . . . . . . . L Near 04DC MODEX_TEXT \r
+@DL_DrawLeft . . . . . . . . . . L Near 051F MODEX_TEXT \r
+@DL_DrawRight . . . . . . . . . L Near 05A3 MODEX_TEXT \r
+@DL_EXIT2 . . . . . . . . . . . L Near 061E MODEX_TEXT \r
+@DL_EXIT . . . . . . . . . . . . L Near 04C4 MODEX_TEXT \r
+@DL_HORZ . . . . . . . . . . . . L Near 0433 MODEX_TEXT \r
+@DL_LONGLN . . . . . . . . . . . L Near 0461 MODEX_TEXT \r
+@DL_NOSWAP1 . . . . . . . . . . L Near 0428 MODEX_TEXT \r
+@DL_NOSWAP2 . . . . . . . . . . L Near 048C MODEX_TEXT \r
+@DL_SLLExit . . . . . . . . . . L Near 0563 MODEX_TEXT \r
+@DL_SLLL2nc . . . . . . . . . . L Near 0543 MODEX_TEXT \r
+@DL_SLLL3nc . . . . . . . . . . L Near 0558 MODEX_TEXT \r
+@DL_SLLLoop . . . . . . . . . . L Near 0537 MODEX_TEXT \r
+@DL_SLR2nc . . . . . . . . . . . L Near 05C5 MODEX_TEXT \r
+@DL_SLR3nc . . . . . . . . . . . L Near 05D9 MODEX_TEXT \r
+@DL_SLRExit . . . . . . . . . . L Near 05E3 MODEX_TEXT \r
+@DL_SLRLoop . . . . . . . . . . L Near 05B9 MODEX_TEXT \r
+@DL_STLExit . . . . . . . . . . L Near 05A1 MODEX_TEXT \r
+@DL_STLLoop . . . . . . . . . . L Near 0575 MODEX_TEXT \r
+@DL_STLnc2 . . . . . . . . . . . L Near 0588 MODEX_TEXT \r
+@DL_STLnc3 . . . . . . . . . . . L Near 059D MODEX_TEXT \r
+@DL_ShallowLeft . . . . . . . . L Near 0525 MODEX_TEXT \r
+@DL_ShallowRight . . . . . . . . L Near 05A7 MODEX_TEXT \r
+@DL_SteepLeft . . . . . . . . . L Near 0566 MODEX_TEXT \r
+@DL_SteepRight . . . . . . . . . L Near 05E5 MODEX_TEXT \r
+@DL_VLINE . . . . . . . . . . . L Near 0481 MODEX_TEXT \r
+@DL_VLoop . . . . . . . . . . . L Near 04B4 MODEX_TEXT \r
+@DL_XRSEG . . . . . . . . . . . L Near 0479 MODEX_TEXT \r
+@DP_WAIT0 . . . . . . . . . . . L Near 0706 MODEX_TEXT \r
+@DP_WAIT1 . . . . . . . . . . . L Near 071B MODEX_TEXT \r
+@DataSize . . . . . . . . . . . Number 0000h \r
+@FB_EXIT . . . . . . . . . . . . L Near 0404 MODEX_TEXT \r
+@FB_LEFT_CONT . . . . . . . . . L Near 037A MODEX_TEXT \r
+@FB_LEFT_LOOP . . . . . . . . . L Near 036A MODEX_TEXT \r
+@FB_L_PLANE_FLUSH . . . . . . . L Near 037C MODEX_TEXT \r
+@FB_MIDDLE_LOOP . . . . . . . . L Near 03C7 MODEX_TEXT \r
+@FB_NORMAL . . . . . . . . . . . L Near 034C MODEX_TEXT \r
+@FB_NOSWAP1 . . . . . . . . . . L Near 031F MODEX_TEXT \r
+@FB_NOSWAP2 . . . . . . . . . . L Near 0339 MODEX_TEXT \r
+@FB_ONE_BAND_ONLY . . . . . . . L Near 03D2 MODEX_TEXT \r
+@FB_ONE_LOOP . . . . . . . . . . L Near 03F4 MODEX_TEXT \r
+@FB_RIGHT_CONT . . . . . . . . . L Near 03B0 MODEX_TEXT \r
+@FB_RIGHT_LOOP . . . . . . . . . L Near 03A0 MODEX_TEXT \r
+@FB_RIGHT . . . . . . . . . . . L Near 037D MODEX_TEXT \r
+@FB_R_EDGE_FLUSH . . . . . . . . L Near 03B3 MODEX_TEXT \r
+@GPC_DECODE_CHAR_BYTE . . . . . L Near 080F MODEX_TEXT \r
+@GPC_EXIT . . . . . . . . . . . L Near 0897 MODEX_TEXT \r
+@GPC_LowChar . . . . . . . . . . L Near 07DB MODEX_TEXT \r
+@GPC_NEXT_LINE . . . . . . . . . L Near 0889 MODEX_TEXT \r
+@GPC_NO_LEFT0BITS . . . . . . . L Near 083C MODEX_TEXT \r
+@GPC_NO_LEFT1BITS . . . . . . . L Near 0831 MODEX_TEXT \r
+@GPC_NO_MIDDLE0BITS . . . . . . L Near 085E MODEX_TEXT \r
+@GPC_NO_MIDDLE1BITS . . . . . . L Near 0853 MODEX_TEXT \r
+@GPC_NO_RIGHT0BITS . . . . . . . L Near 0888 MODEX_TEXT \r
+@GPC_NO_RIGHT1BITS . . . . . . . L Near 087D MODEX_TEXT \r
+@GPC_Set_Char . . . . . . . . . L Near 07E3 MODEX_TEXT \r
+@Interface . . . . . . . . . . . Number 0000h \r
+@LDR_Load . . . . . . . . . . . L Near 0677 MODEX_TEXT \r
+@Model . . . . . . . . . . . . . Number 0004h \r
+@PS_Exit . . . . . . . . . . . . L Near 09AF MODEX_TEXT \r
+@PS_Print_It . . . . . . . . . . L Near 097B MODEX_TEXT \r
+@SAP_Exit . . . . . . . . . . . L Near 06E1 MODEX_TEXT \r
+@SDF_Set_Font . . . . . . . . . L Near 0A06 MODEX_TEXT \r
+@SDP_Exit . . . . . . . . . . . L Near 0720 MODEX_TEXT \r
+@SD_WAIT0 . . . . . . . . . . . L Near 0798 MODEX_TEXT \r
+@SD_WAIT1 . . . . . . . . . . . L Near 079D MODEX_TEXT \r
+@SMX_Exit . . . . . . . . . . . L Near 027B MODEX_TEXT \r
+@STRLoop . . . . . . . . . . . . L Near 05F4 MODEX_TEXT \r
+@STRnc2 . . . . . . . . . . . . L Near 0606 MODEX_TEXT \r
+@STRnc3 . . . . . . . . . . . . L Near 061A MODEX_TEXT \r
+@SVM_BadModeSetup . . . . . . . L Near 015C MODEX_TEXT \r
+@SVM_Continue . . . . . . . . . L Near 0161 MODEX_TEXT \r
+@SVM_EXIT . . . . . . . . . . . L Near 0247 MODEX_TEXT \r
+@SVM_Set_Data . . . . . . . . . L Near 01AA MODEX_TEXT \r
+@SVM_Set_Pages . . . . . . . . . L Near 0207 MODEX_TEXT \r
+@SVM_Setup_CRTC . . . . . . . . L Near 019D MODEX_TEXT \r
+@SVM_Setup_Table . . . . . . . . L Near 0193 MODEX_TEXT \r
+@SW_Exit . . . . . . . . . . . . L Near 0789 MODEX_TEXT \r
+@SW_WAIT0 . . . . . . . . . . . L Near 0761 MODEX_TEXT \r
+@SW_WAIT1 . . . . . . . . . . . L Near 0776 MODEX_TEXT \r
+@TB_COPY2 . . . . . . . . . . . L Near 0B6A MODEX_TEXT \r
+@TB_COPY_LINE . . . . . . . . . L Near 0B26 MODEX_TEXT \r
+@TB_COPY_LOOP . . . . . . . . . L Near 0B2E MODEX_TEXT \r
+@TB_COPY_PLANE . . . . . . . . . L Near 0B1B MODEX_TEXT \r
+@TB_COPY_REMAINDER . . . . . . . L Near 0B68 MODEX_TEXT \r
+@TB_Exit . . . . . . . . . . . . L Near 0BB0 MODEX_TEXT \r
+@TB_NEXT2 . . . . . . . . . . . L Near 0B87 MODEX_TEXT \r
+@TB_NEXT_LINE . . . . . . . . . L Near 0B79 MODEX_TEXT \r
+@TB_SKIP_01 . . . . . . . . . . L Near 0B39 MODEX_TEXT \r
+@TB_SKIP_02 . . . . . . . . . . L Near 0B45 MODEX_TEXT \r
+@TB_SKIP_03 . . . . . . . . . . L Near 0B51 MODEX_TEXT \r
+@TB_SKIP_04 . . . . . . . . . . L Near 0B5D MODEX_TEXT \r
+@TB_SKIP_05 . . . . . . . . . . L Near 0B75 MODEX_TEXT \r
+@TGP_DECODE_CHAR_BYTE . . . . . L Near 090D MODEX_TEXT \r
+@TGP_EXIT . . . . . . . . . . . L Near 096B MODEX_TEXT \r
+@TGP_LowChar . . . . . . . . . . L Near 08D9 MODEX_TEXT \r
+@TGP_NEXT_LINE . . . . . . . . . L Near 095E MODEX_TEXT \r
+@TGP_NO_LEFT1BITS . . . . . . . L Near 092D MODEX_TEXT \r
+@TGP_NO_MIDDLE1BITS . . . . . . L Near 0941 MODEX_TEXT \r
+@TGP_NO_RIGHT1BITS . . . . . . . L Near 095D MODEX_TEXT \r
+@TGP_Set_Char . . . . . . . . . L Near 08E1 MODEX_TEXT \r
+@TPS_Exit . . . . . . . . . . . L Near 09EC MODEX_TEXT \r
+@TPS_Print_It . . . . . . . . . L Near 09BC MODEX_TEXT \r
+@code . . . . . . . . . . . . . Text MODEX_TEXT\r
+@data . . . . . . . . . . . . . Text DGROUP\r
+@fardata? . . . . . . . . . . . Text FAR_BSS\r
+@fardata . . . . . . . . . . . . Text FAR_DATA\r
+@stack . . . . . . . . . . . . . Text DGROUP\r
+ACTIVE_PAGE . . . . . . . . . . Word 0012 _BSS \r
+ALL_PLANES_ON . . . . . . . . . Number 0F02h \r
+ALL_PLANES . . . . . . . . . . . Number 000Fh \r
+ASYNC_RESET . . . . . . . . . . Number 0100h \r
+ATTRIB_Ctrl . . . . . . . . . . Number 03C0h \r
+CHAIN4_OFF . . . . . . . . . . . Number 0604h \r
+CHARSET_HI . . . . . . . . . . . Word 0026 _BSS \r
+CHARSET_LOW . . . . . . . . . . Word 0022 _BSS \r
+CHAR_BITS . . . . . . . . . . . Number 000Fh \r
+CRTC_Data . . . . . . . . . . . Number 03D5h \r
+CRTC_Index . . . . . . . . . . . Number 03D4h \r
+CURRENT_MOFFSET . . . . . . . . Word 001C _BSS \r
+CURRENT_PAGE . . . . . . . . . . Word 0014 _BSS \r
+CURRENT_SEGMENT . . . . . . . . Word 0016 _BSS \r
+CURRENT_XOFFSET . . . . . . . . Word 0018 _BSS \r
+CURRENT_YOFFSET . . . . . . . . Word 001A _BSS \r
+Char_Plane_Data . . . . . . . . Byte 0008 MODEX_TEXT \r
+DAC_READ_ADDR . . . . . . . . . Number 03C7h \r
+DAC_WRITE_ADDR . . . . . . . . . Number 03C8h \r
+DISPLAY_PAGE . . . . . . . . . . Word 0010 _BSS \r
+False . . . . . . . . . . . . . Number 0000h \r
+GC_Index . . . . . . . . . . . . Number 03CEh \r
+GET_CHAR_PTR . . . . . . . . . . Number 1130h \r
+INPUT_1 . . . . . . . . . . . . Number 03DAh \r
+LAST_PAGE . . . . . . . . . . . Word 0004 _BSS \r
+LATCHES_OFF . . . . . . . . . . Number FF08h \r
+LATCHES_ON . . . . . . . . . . . Number 0008h \r
+Left_Clip_Mask . . . . . . . . . Byte 0000 MODEX_TEXT \r
+MAP_MASK_PLANE1 . . . . . . . . Number 0102h \r
+MAP_MASK_PLANE2 . . . . . . . . Number 1102h \r
+MAP_MASK . . . . . . . . . . . . Number 0002h \r
+MAX_XOFFSET . . . . . . . . . . Word 001E _BSS \r
+MAX_YOFFSET . . . . . . . . . . Word 0020 _BSS \r
+MISC_OUTPUT . . . . . . . . . . Number 03C2h \r
+MODE_200_Tall . . . . . . . . . L Near 0044 MODEX_TEXT \r
+MODE_240_Tall . . . . . . . . . L Near 0054 MODEX_TEXT \r
+MODE_320_Wide . . . . . . . . . L Near 0028 MODEX_TEXT \r
+MODE_320x200 . . . . . . . . . . L Near 0074 MODEX_TEXT \r
+MODE_320x240 . . . . . . . . . . L Near 00BC MODEX_TEXT \r
+MODE_320x400 . . . . . . . . . . L Near 0086 MODEX_TEXT \r
+MODE_320x480 . . . . . . . . . . L Near 00CE MODEX_TEXT \r
+MODE_360_Wide . . . . . . . . . L Near 0036 MODEX_TEXT \r
+MODE_360x200 . . . . . . . . . . L Near 00E0 MODEX_TEXT \r
+MODE_360x240 . . . . . . . . . . L Near 0098 MODEX_TEXT \r
+MODE_360x400 . . . . . . . . . . L Near 00F2 MODEX_TEXT \r
+MODE_360x480 . . . . . . . . . . L Near 00AA MODEX_TEXT \r
+MODE_400_Tall . . . . . . . . . L Near 0044 MODEX_TEXT \r
+MODE_480_Tall . . . . . . . . . L Near 0054 MODEX_TEXT \r
+MODE_Double_Line . . . . . . . . L Near 0020 MODEX_TEXT \r
+MODE_Single_Line . . . . . . . . L Near 0018 MODEX_TEXT \r
+MODE_TABLE . . . . . . . . . . . L Near 0064 MODEX_TEXT \r
+NUM_MODES . . . . . . . . . . . Number 0008h \r
+PAGE_ADDR . . . . . . . . . . . Word 0006 _BSS \r
+PAGE_SIZE . . . . . . . . . . . Word 000E _BSS \r
+PEL_DATA_REG . . . . . . . . . . Number 03C9h \r
+PIXEL_PAN_REG . . . . . . . . . Number 0033h \r
+PLANE_BITS . . . . . . . . . . . Number 0003h \r
+READ_MAP . . . . . . . . . . . . Number 0004h \r
+ROM_8x8_Hi . . . . . . . . . . . Number 0004h \r
+ROM_8x8_Lo . . . . . . . . . . . Number 0003h \r
+Right_Clip_Mask . . . . . . . . Byte 0004 MODEX_TEXT \r
+SCREEN_HEIGHT . . . . . . . . . Word 0002 _BSS \r
+SCREEN_WIDTH . . . . . . . . . . Word 0000 _BSS \r
+SC_Data . . . . . . . . . . . . Number 03C5h \r
+SC_Index . . . . . . . . . . . . Number 03C4h \r
+SEQU_RESTART . . . . . . . . . . Number 0300h \r
+START_DISP_HI . . . . . . . . . Number 000Ch \r
+START_DISP_LO . . . . . . . . . Number 000Dh \r
+True . . . . . . . . . . . . . . Number -0001h \r
+VERT_RETRACE . . . . . . . . . . Number 0008h \r
+VGA_Segment . . . . . . . . . . Number A000h \r
+b . . . . . . . . . . . . . . . Text BYTE PTR\r
+d . . . . . . . . . . . . . . . Text DWORD PTR\r
+f . . . . . . . . . . . . . . . Text FAR PTR\r
+nil . . . . . . . . . . . . . . Number 0000h \r
+o . . . . . . . . . . . . . . . Text OFFSET\r
+s . . . . . . . . . . . . . . . Text SHORT\r
+w . . . . . . . . . . . . . . . Text WORD PTR\r
+\r
+ 0 Warnings\r
+ 0 Errors\r
projects / 16.git / blobdiff