+++ /dev/null
-;\r
-; ID_SD_A.ASM\r
-; Id Sound Manager assembly stuff\r
-\r
- .8086\r
- IDEAL\r
- MODEL MEDIUM,C\r
- JUMPS\r
-\r
- INCLUDE 'ID_SD.EQU'\r
-\r
-DEBUG = 0\r
-\r
- EXTRN SDL_DigitizedDone:FAR\r
- EXTRN alOut:FAR\r
-\r
-;============================================================================\r
-\r
-DATASEG\r
-\r
- EXTRN sqActive:WORD\r
- EXTRN ssSample:DWORD\r
- EXTRN ssLengthLeft:WORD\r
- EXTRN ssControl:WORD\r
- EXTRN ssStatus:WORD\r
- EXTRN ssData:WORD\r
- EXTRN ssOn:BYTE\r
- EXTRN ssOff:BYTE\r
-\r
- EXTRN pcSound:DWORD\r
- EXTRN pcLengthLeft:WORD\r
- EXTRN pcLastSample:BYTE\r
- EXTRN pcSoundLookup:WORD\r
-\r
- EXTRN alSound:DWORD\r
- EXTRN alBlock:WORD\r
- EXTRN alLengthLeft:WORD\r
- EXTRN alTimeCount:DWORD\r
-\r
- EXTRN sqHack:DWORD\r
- EXTRN sqHackPtr:DWORD\r
- EXTRN sqHackLen:WORD\r
- EXTRN sqHackSeqLen:WORD\r
- EXTRN sqHackTime:DWORD\r
-\r
- EXTRN HackCount:WORD\r
- EXTRN TimeCount:WORD\r
- EXTRN LocalTime:WORD\r
-\r
- EXTRN TimerCount:WORD\r
- EXTRN TimerDivisor:WORD\r
- EXTRN t0OldService:DWORD\r
-\r
- EXTRN SoundMode:WORD\r
- EXTRN DigiMode:WORD\r
-\r
- EXTRN SoundNumber:WORD\r
- EXTRN SoundPriority:WORD\r
-\r
-count_time dw ?\r
-count_fx dw ?\r
-\r
-pcdtab db 00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b\r
- db 00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b\r
- db 00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b\r
- db 00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b\r
- db 00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b\r
- db 00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b\r
- db 00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b\r
- db 00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b,00b\r
- db 10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b\r
- db 10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b\r
- db 10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b\r
- db 10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b\r
- db 10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b\r
- db 10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b\r
- db 10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b\r
- db 10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b,10b\r
-\r
-\r
-;============================================================================\r
-\r
-CODESEG\r
-\r
-MyDS dw ?\r
-\r
-pcindicate dw ?\r
-extreme dw ?\r
-\r
- PROC SDL_SetDS\r
- PUBLIC SDL_SetDS\r
-\r
- mov ax,ds\r
- mov [cs:MyDS],ds\r
- ret\r
-\r
- ENDP\r
-\r
-;\r
-; COMMONSTART\r
-; Macro used for common prefix code\r
-;\r
- MACRO COMMONSTART\r
- IF DEBUG\r
- push dx\r
- push ax\r
- mov dx,STATUS_REGISTER_1\r
- in al,dx\r
- mov dx,ATR_INDEX\r
- mov al,ATR_OVERSCAN\r
- out dx,al\r
- mov al,4 ; red\r
- out dx,al\r
- ENDIF\r
-\r
- push ds\r
- push ax\r
-\r
- mov ds,[cs:MyDS]\r
- inc [HackCount]\r
- ENDM\r
-\r
-;\r
-; DOFX\r
-; Macro used to do the sound effects code\r
-;\r
- MACRO DOFX\r
- les di,[pcSound] ; PC sound effects\r
- mov ax,es\r
- or ax,di\r
- jz @@nopc ; nil pointer - no PC sound effect going\r
-\r
- mov bl,[es:di] ; Get the byte\r
- inc [WORD PTR pcSound] ; Increment pointer\r
- cmp [pcLastSample],bl ; Is this sample the same as last?\r
- jz @@pcsame ; Yep - don't do anything\r
- mov [pcLastSample],bl ; No, save it for next time\r
-\r
- or bl,bl\r
- jz @@pcoff ; If 0, turn sounds off\r
- xor bh,bh\r
- shl bx,1\r
- mov bx,[pcSoundLookup+bx] ; Use byte as index into frequency table\r
-\r
- mov al,0b6h ; Write to channel 2 (speaker) timer\r
- out pcTAccess,al\r
- mov al,bl\r
- out pcTimer,al ; Low byte\r
- mov al,bh\r
- out pcTimer,al ; High byte\r
-\r
- in al,pcSpeaker ; Turn the speaker & gate on\r
- or al,3\r
- out pcSpeaker,al\r
-\r
- jmp @@pcsame\r
-\r
-@@pcoff:\r
- in al,pcSpeaker ; Turn the speaker & gate off\r
- and al,0fch ; ~3\r
- out pcSpeaker,al\r
-\r
-@@pcsame:\r
- dec [pcLengthLeft] ; Decrement length\r
- jnz @@nopc ; If not 0, we're not done with the sound\r
-\r
- mov ax,0\r
- mov [WORD PTR pcSound],ax ; Zero the pointer\r
- mov [WORD PTR pcSound + 2],ax\r
- mov [SoundNumber],ax ; Indicate no sound\r
- mov [SoundPriority],ax ; with no priority\r
-\r
- in al,pcSpeaker ; Turn the speaker off\r
- and al,0fdh ; ~2\r
- out pcSpeaker,al\r
-@@nopc:\r
-\r
- les di,[alSound] ; AdLib sound effects\r
- mov ax,es\r
- or ax,di\r
- jz @@noal ; nil pointer - no AdLib effect going\r
-\r
- xor ah,ah\r
- mov al,[es:di]\r
- or al,al\r
- jz @@aldone\r
-\r
- CALL alOut C,alFreqL,ax\r
- mov ax,[alBlock]\r
-\r
-@@aldone:\r
- CALL alOut C,alFreqH,ax\r
- inc [WORD PTR alSound]\r
- dec [alLengthLeft]\r
- jnz @@noal\r
-\r
- mov ax,0\r
- mov [WORD PTR alSound],ax ; Zero the pointer\r
- mov [WORD PTR alSound + 2],ax\r
- mov [SoundNumber],ax ; Indicate no sound\r
- mov [SoundPriority],ax ; with no priority\r
- CALL alOut C,alFreqH,ax ; Turn off the sound\r
-@@noal:\r
-\r
- ENDM\r
-\r
-;\r
-;\r
-;\r
- MACRO TIME\r
- cmp [count_time],2\r
- jb @@notime\r
- add [LocalTime],1\r
- adc [LocalTime+2],0\r
- add [TimeCount],1\r
- adc [TimeCount+2],0\r
- mov [count_time],0\r
-@@notime:\r
- ENDM\r
-\r
-;\r
-; COMMONEND\r
-; Macro used for common suffix code\r
-;\r
- MACRO COMMONEND\r
-@@fullexit:\r
- pop es\r
- ;popa\r
- pop di\r
- pop si\r
- pop bp\r
- pop [oldsp]\r
- pop bx\r
- pop dx\r
- pop cx\r
- pop ax\r
-\r
-@@nosave:\r
- mov ax,[TimerDivisor]\r
- add [TimerCount],ax\r
- jnc @@myack\r
-\r
- pushf\r
- call [t0OldService]\r
- jmp @@out\r
-\r
-@@myack:\r
- mov al,20h\r
- out 20h,al\r
-\r
-@@out:\r
- pop ax\r
- pop ds\r
-\r
- IF DEBUG\r
- mov dx,STATUS_REGISTER_1\r
- in al,dx\r
- mov dx,ATR_INDEX\r
- mov al,ATR_OVERSCAN\r
- out dx,al\r
- mov al,3 ; blue\r
- out dx,al\r
- mov al,20h ; normal\r
- out dx,al\r
- pop ax\r
- pop dx\r
- ENDIF\r
-\r
- iret\r
- ENDM\r
-\r
-;\r
-; SDL_IndicatePC\r
-;\r
- PROC SDL_IndicatePC on:WORD\r
- PUBLIC SDL_IndicatePC\r
-\r
- mov ax,[on]\r
- mov [cs:pcindicate],ax\r
- ret\r
-\r
- ENDP\r
-\r
-;\r
-; SDL_t0ExtremeAsmService\r
-; Timer 0 ISR 7000Hz interrupts\r
-;\r
- PROC SDL_t0ExtremeAsmService\r
- PUBLIC SDL_t0ExtremeAsmService\r
-\r
- push ax\r
- mov al,[BYTE PTR cs:pcindicate]\r
- or al,al\r
- jz @@done\r
-\r
- push ds\r
- push es\r
- ;pusha\r
- jmp @@skipme\r
- oldsp dw ?\r
-@@skipme:\r
- mov [oldsp], sp\r
- push ax\r
- push cx\r
- push dx\r
- push bx\r
- push [oldsp]\r
- push bp\r
- push si\r
- push di\r
-\r
- mov ds,[cs:MyDS]\r
-\r
- les di,[pcSound]\r
- mov ax,es\r
- or ax,di\r
- jz @@donereg ; nil pointer\r
-\r
- mov bl,[es:di] ; Get the byte\r
- inc [WORD PTR pcSound] ; Increment pointer\r
-\r
- and bl,11100000b ; Nuke some of the precision (DEBUG - do this in the table)\r
-\r
- xor bh,bh\r
- mov ah,[pcdtab+bx] ; Translate the byte\r
-\r
- in al,pcSpeaker\r
- and al,11111100b\r
- or al,ah\r
- out pcSpeaker,al\r
-\r
- dec [pcLengthLeft]\r
- jnz @@donereg\r
-\r
- mov [WORD PTR pcSound],0 ; We're done with this sample\r
- mov [WORD PTR pcSound+2],0\r
-\r
- in al,pcSpeaker\r
- and al,11111100b\r
- out pcSpeaker,al\r
-\r
- call SDL_DigitizedDone\r
-\r
-@@donereg:\r
- ;popa\r
- pop di\r
- pop si\r
- pop bp\r
- pop [oldsp]\r
- pop bx\r
- pop dx\r
- pop cx\r
- pop ax\r
- pop es\r
- pop ds\r
-\r
-@@done:\r
- inc [cs:extreme]\r
- cmp [cs:extreme],10\r
- jae @@tofast\r
-\r
- mov al,20h\r
- out 20h,al\r
- pop ax\r
- iret\r
-\r
-@@tofast:\r
- mov [cs:extreme],0\r
- pop ax\r
-\r
-; jmp SDL_t0FastAsmService ; Drops through to SDL_t0FastAsmService\r
-\r
- ENDP\r
-\r
-;\r
-; SDL_t0FastAsmService\r
-; Timer 0 ISR for 700Hz interrupts\r
-;\r
- PROC SDL_t0FastAsmService\r
- PUBLIC SDL_t0FastAsmService\r
-\r
- COMMONSTART\r
-\r
- inc [count_fx] ; Time to do PC/AdLib effects & time?\r
- cmp [count_fx],5\r
- jae @@dofull\r
-\r
- mov ax,[sqActive] ; Is the sequencer active?\r
- or ax,ax\r
- jnz @@dofull\r
-\r
- mov ax,[WORD PTR ssSample] ; Is there a sample for the Sound Src?\r
- or ax,[WORD PTR ssSample+2]\r
- jz @@nosave\r
-\r
-@@dofull:\r
- ;pusha\r
- mov [oldsp], sp\r
- push ax\r
- push cx\r
- push dx\r
- push bx\r
- push [oldsp]\r
- push bp\r
- push si\r
- push di\r
- push es\r
-\r
- cmp [count_fx],5\r
- jb @@nofx\r
- mov [count_fx],0\r
- DOFX\r
-\r
- inc [count_time]\r
- TIME\r
-@@nofx:\r
-\r
- mov ax,[sqActive]\r
- or ax,ax\r
- jz @@nosq\r
-\r
- mov ax,[sqHackLen]\r
- or ax,ax\r
- jz @@sqdone\r
-\r
- les di,[sqHackPtr]\r
-@@sqloop:\r
- mov ax,[WORD PTR sqHackTime+2]\r
- cmp ax,[WORD PTR alTimeCount+2]\r
- ja @@sqdone\r
- mov ax,[WORD PTR sqHackTime]\r
- cmp ax,[WORD PTR alTimeCount]\r
- ja @@sqdone\r
-\r
- mov ax,[es:di+2] ; Get time to next event\r
- add ax,[WORD PTR alTimeCount]\r
- mov [WORD PTR sqHackTime],ax\r
- mov ax,[WORD PTR alTimeCount+2]\r
- adc ax,0\r
- mov [WORD PTR sqHackTime+2],ax\r
-\r
- mov ax,[es:di] ; Get register/value pair\r
- xor bh,bh\r
- mov bl,ah\r
- xor ah,ah\r
- CALL alOut C,ax,bx\r
-\r
- add di,4\r
- mov [WORD PTR sqHackPtr],di\r
-\r
- sub [sqHackLen],4\r
- jnz @@sqloop\r
-\r
-@@sqdone:\r
- add [WORD PTR alTimeCount],1\r
- adc [WORD PTR alTimeCount+2],0\r
- mov ax,[sqHackLen]\r
- or ax,ax\r
- jnz @@nosq\r
-\r
- mov ax,[WORD PTR sqHack] ; Copy pointer\r
- mov [WORD PTR sqHackPtr],ax\r
- mov ax,[WORD PTR sqHack+2]\r
- mov [WORD PTR sqHackPtr+2],ax\r
-\r
- mov ax,[sqHackSeqLen] ; Copy length\r
- mov [sqHackLen],ax\r
-\r
- mov ax,0\r
- mov [WORD PTR alTimeCount],ax ; Reset time counts\r
- mov [WORD PTR alTimeCount+2],ax\r
- mov [WORD PTR sqHackTime],ax\r
- mov [WORD PTR sqHackTime+2],ax\r
-@@nosq:\r
-\r
- les di,[ssSample] ; Get pointer to Sound Source sample\r
- mov ax,es\r
- or ax,di\r
- jz @@ssdone ; If nil, skip this\r
-\r
-@@ssloop:\r
- mov dx,[ssStatus] ; Check to see if FIFO has any empty slots\r
- in al,dx\r
- test al,40h\r
- jnz @@ssdone ; Nope - don't push any more data out\r
-\r
- mov dx,[ssData]\r
- mov al,[es:di] ; al = *ssSample\r
- out dx,al ; Pump the value out\r
-\r
- mov dx,[ssControl] ; Pulse printer select\r
- mov al,[ssOff]\r
- out dx,al\r
- push ax\r
- pop ax\r
- mov al,[ssOn]\r
- out dx,al\r
-\r
- push ax ; Delay a short while\r
- pop ax\r
-\r
- inc di\r
- mov [WORD PTR ssSample],di ; ssSample++\r
-\r
- dec [ssLengthLeft]\r
- jnz @@ssloop\r
-\r
- mov [WORD PTR ssSample],0 ; We're done with this sample\r
- mov [WORD PTR ssSample+2],0\r
-\r
- call SDL_DigitizedDone\r
-@@ssdone:\r
-\r
- COMMONEND\r
-\r
- ENDP\r
-\r
-;\r
-; SDL_t0SlowAsmService\r
-; Timer 0 ISR for 140Hz interrupts\r
-;\r
- PROC SDL_t0SlowAsmService\r
- PUBLIC SDL_t0SlowAsmService\r
-\r
- IF DEBUG\r
- push dx\r
- push ax\r
- mov dx,STATUS_REGISTER_1\r
- in al,dx\r
- mov dx,ATR_INDEX\r
- mov al,ATR_OVERSCAN\r
- out dx,al\r
- mov al,4 ; red\r
- out dx,al\r
- ENDIF\r
-\r
- push ds\r
- push ax\r
-\r
- mov ds,[cs:MyDS]\r
-\r
- inc [count_time]\r
- TIME\r
-\r
- mov ax,[WORD PTR pcSound] ; Is there a PC sound effect going?\r
- or ax,[WORD PTR pcSound+2]\r
- jnz @@dofull\r
-\r
- mov ax,[WORD PTR alSound] ; Is there an AdLib sound effect going?\r
- or ax,[WORD PTR alSound+2]\r
- jz @@nosave\r
-\r
-@@dofull:\r
- ;pusha\r
- mov [oldsp], sp\r
- push ax\r
- push cx\r
- push dx\r
- push bx\r
- push [oldsp]\r
- push bp\r
- push si\r
- push di\r
- push es\r
-\r
- DOFX\r
-\r
- COMMONEND\r
-\r
- ENDP\r
-\r
- END\r
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