1 /* Catacomb Apocalypse Source Code
2 * Copyright (C) 1993-2014 Flat Rock Software
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 =============================================================================
24 ID software memory manager
25 --------------------------
27 Primary coder: John Carmack
31 Quit (char *error) function
36 MM_SizePtr to change the size of a given pointer
38 Multiple purge levels utilized
40 EMS / XMS unmanaged routines
42 =============================================================================
46 Open Watcom port by sparky4
49 #include "src/lib/16_mm.h"
50 #include "src/lib/16_ca.h"
57 =============================================================================
61 =============================================================================
64 void (* beforesort) (void);
65 void (* aftersort) (void);
66 void (* XMSaddr) (void); // far pointer to XMS driver
69 =============================================================================
73 =============================================================================
76 static char *ParmStringsexmm[] = {"noems","noxms",""};
79 ======================
83 = Routine from p36 of Extending DOS
85 =======================
88 boolean MML_CheckForEMS(void)
91 static char emmname[] = "EMMXXXX0"; //fix by andrius4669
93 mov dx,OFFSET emmname //fix by andrius4669
95 int 0x21 // try to open EMMXXXX0 device
101 int 0x21 // get device info
109 int 0x21 // get status
115 int 0x21 // close handle
145 ======================
149 =======================
152 byte MML_SetupEMS(global_game_variables_t *gvar)
156 boolean errorflag=false;
158 unsigned int EMSVer = 0;
160 unsigned totalEMSpages,freeEMSpages,EMSPageFrame,EMSpagesmapped,EMSHandle;
161 totalEMSpages = freeEMSpages = EMSPageFrame = EMSpagesmapped = 0;
165 int EMS_INT // make sure EMS hardware is present
167 //mov [EMS_status],ah
174 mov [EMSVer],ax // set EMSVer
175 cmp al,0x32 // only work on ems 3.2 or greater
179 int EMS_INT // find the page frame address
182 mov [EMSPageFrame],bx
185 int EMS_INT // find out how much EMS is there
188 mov [totalEMSpages],dx
189 mov [freeEMSpages],bx
191 jz noEMS // no EMS at all to allocate
195 cmp bx,[freeEMSpages]
197 mov bx,[freeEMSpages]
207 jle getpages // there is only 1,2,3,or 4 pages
208 mov bx,4 // we can't use more than 4 pages
216 mov [EMSpagesmapped],bx
217 mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS
243 strcpy(str,"MM_SetupEMS: EMS error ");
248 gvar->mm.totalEMSpages=totalEMSpages;
249 gvar->mm.freeEMSpages=freeEMSpages;
250 gvar->mm.EMSPageFrame=EMSPageFrame;
251 gvar->mm.EMSpagesmapped=EMSpagesmapped;
252 gvar->mm.EMSHandle=EMSHandle;
253 gvar->mm.EMSVer=EMSVer;
259 ======================
263 =======================
266 void MML_ShutdownEMS(global_game_variables_t *gvar)
268 boolean errorflag=false;
269 unsigned EMSHandle=gvar->mm.EMSHandle;
288 Quit("MML_ShutdownEMS: Error freeing EMS!\n"); //++++ add something
296 = Maps the 64k of EMS used by memory manager into the page frame
297 = for general use. This only needs to be called if you are keeping
298 = other things in EMS.
303 byte MM_MapEMS(global_game_variables_t *gvar)
308 boolean errorflag=false;
310 EMSHandle=gvar->mm.EMSHandle;
312 for (i=0;i<4/*MAPPAGES*/;i++)
316 mov bx,[i] // logical page
317 mov al,bl // physical page
318 mov dx,[EMSHandle] // handle
341 strcpy(str,"MM_MapEMS: EMS error ");
347 gvar->mmi.EMSmem = (i)*0x4000lu;
351 byte MM_MapXEMS(global_game_variables_t *gvar)
353 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
355 //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
356 //PhysicalStart = Physical page first logical page is mapped to
357 //LogicalStart = First logical page to map
358 //NumPages = Number of pages to map (1 to 4)
359 //Handle = EMS handle logical pages are allocated to
361 /*//Create a buffer containing the page information
362 // FOR x = 0 TO NumPages - 1
363 // MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
366 // Regs.ax = 0x5000 //Map the pages in the buffer
367 // Regs.cx = NumPages //to the pageframe
369 // Regs.ds = VARSEG(MapInfo$)
370 // Regs.si = SADD(MapInfo$)
371 // InterruptX 0x67, Regs, Regs
372 // EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100 //Store the status code
378 boolean errorflag=false;
380 EMSHandle=gvar->mm.EMSHandle;
382 if(gvar->mm.EMSVer<0x40)
385 for (i=0;i<MAPPAGES;i++)
389 mov cx,[i] // logical page
390 mov al,bl // physical page
391 mov dx,[EMSHandle] // handle
414 //strcpy(str,"MM_MapXEMS: EMS error 0x");
415 strcpy(str,"MM_MapXEMS: EMS error ");
419 //printf("%s%x\n",str, err);
420 //printf("FACK! %x\n", err);
424 gvar->mmi.EMSmem = (i)*0x4000lu;
428 //==========================================================================
431 ======================
435 = Check for XMM driver
437 =======================
440 boolean MML_CheckForXMS(void)
442 boolean errorflag=false;
446 int 0x2f // query status of installed diver
457 if(errorflag==true) return false;
463 ======================
467 = Try to allocate all upper memory block
469 =======================
472 void MML_SetupXMS(global_game_variables_t *gvar)
480 mov [WORD PTR XMSaddr],bx
481 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
486 mov dx,0xffff // try for largest block possible
487 //mov ax,dx // Set available Kbytes.
488 call [DWORD PTR XMSaddr]
492 cmp bl,0xb0 // error: smaller UMB is available
496 call [DWORD PTR XMSaddr] // DX holds largest available UMB
498 jz done // another error...
515 // printf("base=%u ", base); printf("size=%u\n", size);
516 MML_UseSpace(base,size, gvar);
517 gvar->mmi.XMSmem += size*16;
518 gvar->mm.UMBbase[gvar->mm.numUMBs] = base;
520 if(gvar->mm.numUMBs < MAXUMBS)
526 ======================
530 ======================
533 void MML_ShutdownXMS(global_game_variables_t *gvar)
538 for (i=0;i<gvar->mm.numUMBs;i++)
540 base = gvar->mm.UMBbase[i];
544 call [DWORD PTR XMSaddr]
549 //==========================================================================
552 ======================
556 = Marks a range of paragraphs as usable by the memory manager
557 = This is used to mark space for the near heap, far heap, ems page frame,
558 = and upper memory blocks
560 ======================
563 /*void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
565 //huge mmblocktype huge *scan,huge *last;
571 scan = last = gvar->mm.mmhead;
572 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
575 // search for the block that contains the range of segments
577 while(scan->start+scan->length < segstart)
584 // take the given range out of the block
586 oldend = scan->start + scan->length;
587 extra = oldend - (segstart+seglength);
592 if(segm>1)/// || extra>=0x10000lu)
597 //MML_UseSpace(segstart, seglength, gvar);
599 printf("MML_UseSpace: Segment spans two blocks!\n");
601 printf("segm=%u ", segm);
602 printf("ex=%lu ", extra);
603 printf("old=%u ", oldend);
604 printf("start+seglen=%lu\n", segstart+seglength);
605 printf("segsta=%x ", segstart);
606 printf("len=%lu ", scan->length);
607 printf("seglen=%lu ", seglength);
608 printf("segmlen=%lu\n", segmlen);
610 //++++todo: linked list of segment!
611 if(segstart == scan->start)
613 last->next = scan->next; // unlink block
618 scan->length = segstart-scan->start; // shorten block
623 gvar->mm.mmnew->useptr = NULL;
625 gvar->mm.mmnew->next = scan->next;
626 scan->next = gvar->mm.mmnew;
627 gvar->mm.mmnew->start = segstart+seglength;
628 gvar->mm.mmnew->length = extra;
629 gvar->mm.mmnew->attributes = LOCKBIT;
630 }//else if(segm>0) goto segu;
633 void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
635 mmblocktype far *scan,far *last;
640 scan = last = gvar->mm.mmhead;
641 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
644 // search for the block that contains the range of segments
646 while (scan->start+scan->length < segstart)
653 // find out how many blocks it spans!
655 /*for(;seglength>=0x10000;seglength-=0xFFFF)
657 //printf(" seglen=%lu\n", segmlen);
662 // take the given range out of the block
664 oldend = scan->start + scan->length;
665 extra = oldend - (segstart+((unsigned)seglength));
668 printf("========================================\n");
669 printf("start=%x ", scan->start);
670 printf("old=%u ", oldend);
671 printf("start+seglen=%lu\n", segstart+seglength);
672 printf("segsta=%x ", segstart);
673 printf("len=%lu ", scan->length);
674 printf("seglen=%lu ", seglength);
676 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
677 printf("========================================\n");
681 if (segstart == scan->start)
683 last->next = scan->next; // unlink block
688 scan->length = segstart-scan->start; // shorten block
693 gvar->mm.mmnew->useptr = NULL;
695 gvar->mm.mmnew->next = scan->next;
696 scan->next = gvar->mm.mmnew;
697 gvar->mm.mmnew->start = segstart+seglength;
698 gvar->mm.mmnew->length = extra;
699 gvar->mm.mmnew->attributes = LOCKBIT;
704 //==========================================================================
711 = We are out of blocks, so free a purgable block
716 void MML_ClearBlock(global_game_variables_t *gvar)
718 //huge mmblocktype huge *scan,huge *last;
719 mmblocktype far *scan,far *last;
721 scan = gvar->mm.mmhead->next;
725 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
727 MM_FreePtr(scan->useptr, gvar);
733 printf("MM_ClearBlock: No purgable blocks!\n");
737 //==========================================================================
744 = Grabs all space from turbo with malloc/farmalloc
745 = Allocates bufferseg misc buffer
750 void MM_Startup(global_game_variables_t *gvar)
753 //dword length,seglength;
754 dword length; word seglength;
755 //huge void huge *start;
757 word segstart;//,endfree;
760 if(gvar->mm.mmstarted)
763 gvar->mm.mmstarted = true;
764 gvar->mm.bombonerror = true;
767 // set up the linked list (everything in the free list;
769 gvar->mm.mmhead = NULL;
770 gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);
771 for(i=0;i<MAXBLOCKS-1;i++)
773 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);
775 gvar->mm.mmblocks[i].next = NULL;
778 // locked block of all memory until we punch out free space
781 gvar->mm.mmhead = gvar->mm.mmnew; // this will allways be the first node
782 gvar->mm.mmnew->start = 0;
783 gvar->mm.mmnew->length = 0xffff;
784 gvar->mm.mmnew->attributes = LOCKBIT;
785 gvar->mm.mmnew->next = NULL;
786 //gvar->mm.mmnew->useptr = peeonself;
787 gvar->mm.mmrover = gvar->mm.mmhead;
789 //printf(" %x\n", peeonself);
790 //printf(" %x\n", *peeonself);
792 // get all available near conventional memory segments
796 length=(dword)_memavl();//(dword)GetFreeSize();
797 //huge start = (void huge *)(gvar->mm.nearheap = _nmalloc(length));
798 start = (void far *)(gvar->mm.nearheap = _nmalloc(length));
802 //huge start = (void huge *)(gvar->mm.nearheap = malloc(length));
803 start = (void far *)(gvar->mm.nearheap = malloc(length));
805 length -= 16-(FP_OFF(start)&15);
806 length -= SAVENEARHEAP;
807 seglength = length / 16; // now in paragraphs
808 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
809 MML_UseSpace(segstart,seglength, gvar);
810 gvar->mmi.nearheap = length;
811 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
814 // get all available far conventional memory segments
816 //printf("_FARCORELEFT %lu\n", _FCORELEFT);
819 length=_FCORELEFT;//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
822 printf("farcoreleft() %lu\n", farcoreleft());
823 printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
824 length=farcoreleft();//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
826 start = gvar->mm.farheap = _fmalloc(length);
827 //start = gvar->mm.farheap = halloc(length, 1);
828 length -= 16-(FP_OFF(start)&15);
829 length -= SAVEFARHEAP;
830 seglength = length / 16; // now in paragraphs
831 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
832 MML_UseSpace(segstart,seglength, gvar);
833 gvar->mmi.farheap = length;
834 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
836 gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
841 // detect EMS and allocate up to 64K at page frame
843 gvar->mmi.EMSmem = 0;
844 //goto emsskip; //0000
861 ,ParmStringsexmm) == 0)
862 goto emsskip; // param NOEMS
864 if(MML_CheckForEMS())
866 MML_SetupEMS(gvar); // allocate space
867 //16_PM: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
868 MML_UseSpace(gvar->mm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);
869 //if(gvar->pm.emm.EMSVer<0x40)
870 MM_MapEMS(gvar); // map in used pages
872 //MM_MapXEMS(gvar); // map in used pages
876 // detect XMS and get upper memory blocks
879 gvar->mmi.XMSmem = 0;
897 ,ParmStringsexmm) == 0)
898 goto xmsskip; // param NOXMS
900 if(MML_CheckForXMS())
902 MML_SetupXMS(gvar); // allocate as many UMBs as possible
908 // allocate the misc buffer
911 gvar->mm.mmrover = gvar->mm.mmhead; // start looking for space after low block
913 MM_GetPtr(&(gvar->mm.bufferseg),BUFFERSIZE, gvar);
916 //==========================================================================
923 = Frees all conventional, EMS, and XMS allocated
928 void MM_Shutdown(global_game_variables_t *gvar)
930 if(!(gvar->mm.mmstarted))
933 _ffree(gvar->mm.farheap);// printf(" far freed\n");
935 _nfree(gvar->mm.nearheap);// printf(" near freed\n");
938 free(gvar->mm.nearheap);// printf(" near freed\n");
943 if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf(" EMS freed\n"); }
944 if(MML_CheckForXMS()){ MML_ShutdownXMS(gvar); }//printf(" XMS freed\n"); }
950 //==========================================================================
957 = Allocates an unlocked, unpurgable block
962 void MM_GetPtr (memptr *baseptr, dword size, global_game_variables_t *gvar)
964 //huge mmblocktype huge *scan,huge *lastscan,huge *endscan,huge *purge,huge *next;
965 mmblocktype far *scan,far *lastscan,far *endscan,far *purge,far *next;
967 unsigned needed,startseg;
969 needed = (size+15)/16; // convert size from bytes to paragraphs
971 GETNEWBLOCK; // fill in start and next after a spot is found
972 gvar->mm.mmnew->length = needed;
973 gvar->mm.mmnew->useptr = baseptr;
974 //if(gvar->mm.mmnew->useptr==NULL){
976 printf("MM_GetPtr\n");
978 printf(" baseptr=%Fp ", baseptr); printf("useptr=%Fp\n", gvar->mm.mmnew->useptr);
979 printf(" *baseptr=%Fp ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
980 printf(" &baseptr=%Fp ", &baseptr); printf("&useptr=%Fp\n", &(gvar->mm.mmnew->useptr));
983 gvar->mm.mmnew->attributes = BASEATTRIBUTES;
986 for (search = 0; search<3; search++)
989 // first search: try to allocate right after the rover, then on up
990 // second search: search from the head pointer up to the rover
991 // third search: compress memory, then scan from start
992 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)
998 lastscan = gvar->mm.mmrover;
999 scan = gvar->mm.mmrover->next;
1003 lastscan = gvar->mm.mmhead;
1004 scan = gvar->mm.mmhead->next;
1005 endscan = gvar->mm.mmrover;
1009 lastscan = gvar->mm.mmhead;
1010 scan = gvar->mm.mmhead->next;
1015 startseg = lastscan->start + lastscan->length;
1017 while (scan != endscan)
1019 if (scan->start - startseg >= needed)
1022 // got enough space between the end of lastscan and
1023 // the start of scan, so throw out anything in the middle
1024 // and allocate the new block
1026 purge = lastscan->next;
1027 lastscan->next = gvar->mm.mmnew;
1028 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;
1029 gvar->mm.mmnew->next = scan;
1030 while ( purge != scan)
1031 { // free the purgable block
1034 purge = next; // purge another if not at scan
1036 gvar->mm.mmrover = gvar->mm.mmnew;
1037 return; // good allocation!
1041 // if this block is purge level zero or locked, skip past it
1043 if ( (scan->attributes & LOCKBIT)
1044 || !(scan->attributes & PURGEBITS) )
1047 startseg = lastscan->start + lastscan->length;
1051 scan=scan->next; // look at next line
1055 if (gvar->mm.bombonerror)
1060 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));
1061 printf("for stability reasons the program will shut down! wwww\n");
1066 gvar->mm.mmerror = true;
1069 //==========================================================================
1072 ====================
1076 = Allocates an unlocked, unpurgable block
1078 ====================
1081 void MM_FreePtr(memptr *baseptr, global_game_variables_t *gvar)
1083 //huge mmblocktype huge *scan,huge *last;
1084 mmblocktype far *scan,far *last;
1086 last = gvar->mm.mmhead;
1089 if(baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
1090 gvar->mm.mmrover = gvar->mm.mmhead;
1092 while(scan->useptr != baseptr && scan)
1100 printf("MM_FreePtr: Block not found!\n");
1104 last->next = scan->next;
1108 //==========================================================================
1111 =====================
1115 = Sets the purge level for a block (locked blocks cannot be made purgable)
1117 =====================
1121 void MM_SetPurge(memptr *baseptr, int purge, global_game_variables_t *gvar)
1123 //huge mmblocktype huge *start;
1124 mmblocktype far *start;
1126 start = gvar->mm.mmrover;
1130 if(gvar->mm.mmrover->useptr == baseptr)
1133 gvar->mm.mmrover = gvar->mm.mmrover->next;
1135 if(!gvar->mm.mmrover)
1136 gvar->mm.mmrover = gvar->mm.mmhead;
1137 else if(gvar->mm.mmrover == start)
1139 Quit("MM_SetPurge: Block not found!");
1145 gvar->mm.mmrover->attributes &= ~PURGEBITS;
1146 gvar->mm.mmrover->attributes |= purge;
1149 //==========================================================================
1152 =====================
1156 = Locks / unlocks the block
1158 =====================
1161 void MM_SetLock(memptr *baseptr, boolean locked, global_game_variables_t *gvar)
1163 //huge mmblocktype huge *start;
1164 mmblocktype far *start;
1166 start = gvar->mm.mmrover;
1170 if(gvar->mm.mmrover->useptr == baseptr)
1173 gvar->mm.mmrover = gvar->mm.mmrover->next;
1175 if(!gvar->mm.mmrover)
1176 gvar->mm.mmrover = gvar->mm.mmhead;
1177 else if(gvar->mm.mmrover == start)
1179 Quit("MM_SetLock: Block not found!");
1185 gvar->mm.mmrover->attributes &= ~LOCKBIT;
1186 gvar->mm.mmrover->attributes |= locked*LOCKBIT;
1189 //==========================================================================
1192 =====================
1196 = Throws out all purgable stuff and compresses movable blocks
1198 =====================
1201 void MM_SortMem(global_game_variables_t *gvar)
1203 //huge mmblocktype huge *scan,huge *last,huge *next;
1204 mmblocktype far *scan,far *last,far *next;
1205 unsigned start,length,source,dest,oldborder;
1209 // lock down a currently playing sound
1211 /*++++ playing = SD_SoundPlaying ();
1217 playing += STARTPCSOUNDS;
1220 playing += STARTADLIBSOUNDS;
1223 MM_SetLock(&(memptr)audiosegs[playing],true);
1228 // oldborder = bordercolor;
1229 // VW_ColorBorder (15);
1234 scan = gvar->mm.mmhead;
1236 last = NULL; // shut up compiler warning
1240 if(scan->attributes & LOCKBIT)
1243 // block is locked, so try to pile later blocks right after it
1245 start = scan->start + scan->length;
1249 if(scan->attributes & PURGEBITS)
1252 // throw out the purgable block
1256 //MM_FreeBlock(scan, gvar);
1264 // push the non purgable block on top of the last moved block
1266 if(scan->start != start)
1268 length = scan->length;
1269 source = scan->start;
1271 while(length > 0xf00)
1273 movedata(source,0,dest,0,0xf00*16);
1278 movedata(source,0,dest,0,length*16);
1280 scan->start = start;
1281 *(unsigned *)scan->useptr = start;
1283 start = scan->start + scan->length;
1288 scan = scan->next; // go to next block
1291 gvar->mm.mmrover = gvar->mm.mmhead;
1296 // VW_ColorBorder (oldborder);
1299 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1302 //==========================================================================
1305 =====================
1309 =====================
1312 void MM_ShowMemory(global_game_variables_t *gvar)
1314 //huge mmblocktype huge *scan;
1315 mmblocktype far *scan;
1321 byte scratch[160],scratch0[4096],scratch1[160],str[16];
1323 //**** VW_SetDefaultColors();
1324 //**** VW_SetLineWidth(40);
1325 //++++mh temp = bufferofs;
1326 //++++mh bufferofs = 0;
1327 //**** VW_SetScreen (0,0);
1328 scan = gvar->mm.mmhead;
1331 CA_OpenDebug (gvar);
1335 strcpy(scratch, AARESET);
1336 if(scan->attributes & PURGEBITS)
1337 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
1339 strcpy(scratch0, AABLUE); // medium blue = non purgable
1340 if(scan->attributes & LOCKBIT)
1341 strcpy(scratch0, AARED); // red = locked
1342 if(scan->start<=end)
1344 printf("\nend==%d\n\n", end);
1345 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1346 strcat(scratch, "End's Size: ");
1348 strcat (scratch,str);
1349 strcat(scratch, "\nscan->start's Size: ");
1350 ultoa (scan->start,str,10);
1351 strcat (scratch,str);
1352 write(gvar->handle.debughandle,scratch,strlen(scratch));
1353 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1356 end = scan->start+(scan->length)-1;
1357 //++++ chy = scan->start/320;
1358 //++++ chx = scan->start%320;
1359 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1360 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1362 //++++ modexClearRegion(page, chx, chy, 4, 4, color);
1364 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1365 for(w=(scan->start)/80;w<=end/80;w++)
1367 //printf("+ %u %lu\n", w, scan->length);
1368 strcat(scratch0, "+");
1370 //++==++==optional strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1371 //++++ VW_Plot(scan->start,0,15);
1372 //++++ modexClearRegion(page, chx, chy, 4, 4, 15);
1373 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1375 //wwww=(dword)(scan->next->start)-(dword)scan->start;
1376 //wwww=(dword)scan->start+(dword)(scan->next->start);
1377 if (scan->next && scan->next->start >= end+1)
1379 strcat(scratch0, AARESET);
1380 //++==++==optional strcat(scratch0, "\n");
1381 strcat(scratch0,AAGREEN);
1382 for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
1383 //for(w=(wwww)/80;w<=((end+1)/80);w++)
1384 //for(w=(end+1)/80;w<=((wwww)/80);w++)
1386 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
1387 strcat(scratch0,"0");
1389 //printf("==================\n");
1390 //printf("w=%u wwww=%lu start=%04x next=%04x end=%lu\n", w/80, wwww/80, scan->start, (scan->next->start), end+1);
1391 //printf("==================\n");
1392 strcat(scratch0, "\n");
1394 }/*else {//if(scan->next->start <= scan->start){
1395 scan->next->start=scan->start+0x1000;
1396 wwww=(dword)(scan->next->start)-(dword)scan->start;
1397 strcat(scratch0, AARESET);
1398 strcat(scratch0, "\n");
1399 strcat(scratch0,AAGREEN);
1400 for(w=(end+1);w<=(0x1000/80);w++)
1402 //printf("0 %x %x %u\n", scan->start, w);
1403 strcat(scratch0,"0");
1405 printf("================\n");
1406 printf("w=%x start=%x next=%x end=%u %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1407 printf("================\n");
1410 strcat(scratch0, AARESET);
1411 //strcat(scratch0,"\n");
1412 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1414 // chx+=scan->next->start;
1415 // modexClearRegion(page, chx, chy, 4, 4, 2);
1417 //modexhlin(page, end+1,scan->next->start, chy, 0);
1418 /* y = scan->start/320;
1419 x = scan->start%320;
1420 VW_Hlin(x,x+end,y,color);
1422 //++++ VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1423 strcat(scratch,"Seg:");
1424 ultoa (scan->start,str,16);
1425 strcat (scratch,str);
1426 strcat (scratch,"\tSize:");
1427 ultoa ((unsigned)scan->length,str,10);
1428 strcat (scratch,str);
1429 strcat (scratch,"\tOwner:0x");
1430 owner = (unsigned)scan->useptr;
1431 ultoa (owner,str,16);
1432 strcat (scratch,str);
1433 strcat (scratch,"\n");
1434 write(gvar->handle.debughandle,scratch,strlen(scratch));
1435 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1436 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1438 //fprintf(stdout, "%s", scratch);
1442 /*strcpy(scratch1, AARESET);
1443 strcat(scratch1, "========================================\n");
1444 strcat(scratch1, "near= ");
1445 ultoa (*(gvar->mm.nearheap),str,10);
1446 strcat (scratch1,str);
1447 strcat(scratch1, " far= ");
1448 ultoa (*(gvar->mm.farheap),str,10);
1449 strcat (scratch1,str);
1450 strcat(scratch1, "\n");
1451 //strcat(scratch1, "&near= %Fp ", &(gvar->mm.nearheap));
1452 //strcat(scratch1, "&far= %Fp", &(gvar->mm.farheap));
1453 //strcat(scratch1, "\n");
1454 strcat(scratch1, "========================================\n");
1455 write(gvar->handle.debughandle,scratch1,strlen(scratch1));*/
1458 CA_CloseDebug (gvar);
1461 //**** VW_SetLineWidth(64);
1462 //++++mh bufferofs = temp;
1465 //==========================================================================
1468 =====================
1472 =====================
1475 void MM_DumpData(global_game_variables_t *gvar)
1477 //huge mmblocktype huge *scan,huge *best;
1478 mmblocktype far *scan,far *best;
1479 long lowest,oldlowest;
1484 free(gvar->mm.nearheap);
1486 dumpfile = fopen ("mmdump.16b","w");
1489 dumpfile = fopen ("mmdump.16w","w");
1492 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1502 scan = gvar->mm.mmhead;
1505 owner = (unsigned)scan->useptr;
1507 if (owner && owner<lowest && owner > oldlowest)
1516 if (lowest != 0xffff)
1518 if (best->attributes & PURGEBITS)
1522 if (best->attributes & LOCKBIT)
1526 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1527 ,(unsigned)lowest,lock,purge,best->length);
1530 } while (lowest != 0xffff);
1533 printf("MMDUMP.16 created.\n");
1536 //==========================================================================
1540 ======================
1544 = Returns the total free space without purging
1546 ======================
1549 dword MM_UnusedMemory(global_game_variables_t *gvar)
1552 //huge mmblocktype huge *scan;
1553 mmblocktype far *scan;
1556 scan = gvar->mm.mmhead;
1560 free += scan->next->start - (scan->start + scan->length);
1568 //==========================================================================
1572 ======================
1576 = Returns the total free space with purging
1578 ======================
1581 dword MM_TotalFree(global_game_variables_t *gvar)
1584 //huge mmblocktype huge *scan;
1585 mmblocktype far *scan;
1588 scan = gvar->mm.mmhead;
1592 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1593 free += scan->length;
1594 free += scan->next->start - (scan->start + scan->length);
1602 //==========================================================================
1605 =====================
1609 =====================
1612 void MM_Report_(global_game_variables_t *gvar)
1614 printf("========================================\n");
1615 printf(" MM_Report_\n");
1616 printf("========================================\n");
1617 if(MML_CheckForEMS())
1619 printf(" %cLIMEMS %u\n", 0xC9, gvar->pm.emm.EMSPresent);
1620 printf(" %c%cEMM v%x.%x available\n", 0xC7, 0xC4, gvar->pm.emm.EMSVer>>4,gvar->pm.emm.EMSVer&0x0F);
1621 printf(" %c%ctotalEMSpages: %u ", 0xC7, 0xC4, gvar->pm.emm.totalEMSpages); printf("freeEMSpages: %u\n", gvar->pm.emm.freeEMSpages);
1622 printf(" %c%cEMSPageFrame: %04x\n", 0xC7, 0xC4, gvar->pm.emm.EMSPageFrame);
1623 printf(" %c%cEMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.EMSmem);
1625 if(MML_CheckForXMS())
1627 printf(" %cXMS %u\n", 0xC9, gvar->pm.xmm.XMSPresent);
1628 //++++ printf(" XMS v%x.%x available\n", gvar->pm.xmm.XMSVer>>4,gvar->pm.xmm.XMSVer&0x0F);
1629 printf(" %c%cXMSDriver: %Fp\n", 0xC7, 0xC4, XMSDriver);
1630 printf(" %c%cXMSHandle: %04x\n", 0xD3, 0xC4, gvar->pm.xmm.XMSHandle);
1631 printf(" %c%cXMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.XMSmem);
1633 printf(" %cConv. %u\n", 0xC9, gvar->pm.mm.MainPresent); DebugMemory_(gvar, 0);
1634 //printf("mainmem: %lu\n", gvar->mmi.mainmem);
1635 //printf("Total convmem: %lu ", gvar->mmi.mainmem); printf("TotalFree: %lu ", MM_TotalFree(gvar)+gvar->mmi.EMSmem+gvar->mmi.XMSmem+gvar->mmi.XMSmem); printf("TotalUsed: %lu\n", gvar->mmi.mainmem);
1636 //printf(" UnusedMemory: %lu\n", MM_UnusedMemory(gvar));
1637 printf("nearheap: %lu ", gvar->mmi.nearheap); printf("farheap: %lu\n", gvar->mmi.farheap);
1640 //==========================================================================
1643 =====================
1647 =====================
1650 void MM_EMSerr(byte *stri, byte err)
1652 //Returns a text string describing the error code in EMS.Error.
1656 strcat(stri, "successful");
1659 strcat(stri, "internal error");
1662 strcat(stri, "hardware malfunction");
1665 strcat(stri, "busy .. retry later");
1668 strcat(stri, "invalid handle");
1671 strcat(stri, "undefined function requested by application");
1674 strcat(stri, "no more handles available");
1677 strcat(stri, "error in save or restore of mapping context");
1680 strcat(stri, "insufficient memory pages in system");
1683 strcat(stri, "insufficient memory pages available");
1686 strcat(stri, "zero pages requested");
1689 strcat(stri, "invalid logical page number encountered");
1692 strcat(stri, "invalid physical page number encountered");
1695 strcat(stri, "page-mapping hardware state save area is full");
1698 strcat(stri, "save of mapping context failed");
1701 strcat(stri, "restore of mapping context failed");
1704 strcat(stri, "undefined subfunction");
1707 strcat(stri, "undefined attribute type");
1710 strcat(stri, "feature not supported");
1713 strcat(stri, "successful, but a portion of the source region has been overwritten");
1716 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1719 strcat(stri, "conventional and expanded memory regions overlap");
1722 strcat(stri, "offset within logical page exceeds size of logical page");
1725 strcat(stri, "region length exceeds 1 MB");
1728 strcat(stri, "source and destination EMS regions have same handle and overlap");
1731 strcat(stri, "memory source or destination type undefined");
1734 strcat(stri, "specified alternate map register or DMA register set not supported");
1737 strcat(stri, "all alternate map register or DMA register sets currently allocated");
1740 strcat(stri, "alternate map register or DMA register sets not supported");
1743 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1746 strcat(stri, "dedicated DMA channels not supported");
1749 strcat(stri, "specified dedicated DMA channel not supported");
1752 strcat(stri, "no such handle name");
1755 strcat(stri, "a handle found had no name, or duplicate handle name");
1758 strcat(stri, "attempted to wrap around 1M conventional address space");
1761 strcat(stri, "source array corrupted");
1764 strcat(stri, "operating system denied access");
1767 strcat(stri, "undefined error");
1771 //==========================================================================
1774 =====================
1778 =====================
1781 void MM_BombOnError(boolean bomb, global_game_variables_t *gvar)
1783 gvar->mm.bombonerror = bomb;
1786 /*void MM_GetNewBlock(global_game_variables_t *gvar)
1788 if(!gvar->mm.mmfree)
1789 MML_ClearBlock(gvar);
1790 gvar->mm.mmnew=gvar->mm.mmfree;
1791 gvar->mm.mmfree=gvar->mm.mmfree->next;
1792 if(!(gvar->mm.mmnew=gvar->mm.mmfree))
1794 printf("MM_GETNEWBLOCK: No free blocks!\n");
1797 gvar->mm.mmfree=gvar->mm.mmfree->next;
1800 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
1803 x->next=gvar->mm.mmfree;
1807 void xms_call(byte v, global_game_variables_t *gvar)
1809 dword XMSDriver = gvar->pm.xmm.XMSDriver;
1812 call [DWORD PTR XMSDriver]
1816 /*void MM_seguin(void)
1826 void MM_segude(void)
1834 pull data from far and put it into ds var