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 (global_game_variables_t *gvar, 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"
58 =============================================================================
62 =============================================================================
65 void (* beforesort) (void);
66 void (* aftersort) (void);
67 void (* XMSaddr) (void); // far pointer to XMS driver
70 =============================================================================
74 =============================================================================
77 static char *ParmStringsexmm[] = {"noems","noxms",""};
80 ======================
84 = Routine from p36 of Extending DOS
86 =======================
89 boolean MML_CheckForEMS(void)
92 static char emmname[] = "EMMXXXX0"; //fix by andrius4669
94 mov dx,OFFSET emmname //fix by andrius4669
96 int 0x21 // try to open EMMXXXX0 device
102 int 0x21 // get device info
110 int 0x21 // get status
116 int 0x21 // close handle
146 ======================
150 =======================
153 byte MML_SetupEMS(global_game_variables_t *gvar)
157 boolean errorflag=false;
159 unsigned int EMSVer = 0;
161 unsigned totalEMSpages,freeEMSpages,EMSPageFrame,EMSpagesmapped,EMSHandle;
162 totalEMSpages = freeEMSpages = EMSPageFrame = EMSpagesmapped = 0;
166 int EMS_INT // make sure EMS hardware is present
168 //mov [EMS_status],ah
175 mov [EMSVer],ax // set EMSVer
176 cmp al,0x32 // only work on ems 3.2 or greater
180 int EMS_INT // find the page frame address
183 mov [EMSPageFrame],bx
186 int EMS_INT // find out how much EMS is there
189 mov [totalEMSpages],dx
190 mov [freeEMSpages],bx
192 jz noEMS // no EMS at all to allocate
196 cmp bx,[freeEMSpages]
198 mov bx,[freeEMSpages]
208 jle getpages // there is only 1,2,3,or 4 pages
209 mov bx,4 // we can't use more than 4 pages
217 mov [EMSpagesmapped],bx
218 mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS
244 strcpy(str,"MM_SetupEMS: EMS error ");
249 gvar->mm.totalEMSpages=totalEMSpages;
250 gvar->mm.freeEMSpages=freeEMSpages;
251 gvar->mm.EMSPageFrame=EMSPageFrame;
252 gvar->mm.EMSpagesmapped=EMSpagesmapped;
253 gvar->mm.EMSHandle=EMSHandle;
254 gvar->mm.EMSVer=EMSVer;
260 ======================
264 =======================
267 void MML_ShutdownEMS(global_game_variables_t *gvar)
269 boolean errorflag=false;
270 unsigned EMSHandle=gvar->mm.EMSHandle;
289 Quit (gvar, "MML_ShutdownEMS: Error freeing EMS!\n"); //++++ add something
297 = Maps the 64k of EMS used by memory manager into the page frame
298 = for general use. This only needs to be called if you are keeping
299 = other things in EMS.
304 byte MM_MapEMS(global_game_variables_t *gvar)
309 boolean errorflag=false;
311 EMSHandle=gvar->mm.EMSHandle;
313 for (i=0;i<4/*MAPPAGES*/;i++)
317 mov bx,[i] // logical page
318 mov al,bl // physical page
319 mov dx,[EMSHandle] // handle
342 strcpy(str,"MM_MapEMS: EMS error ");
348 gvar->mmi.EMSmem = (i)*0x4000lu;
352 byte MM_MapXEMS(global_game_variables_t *gvar)
354 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
356 //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
357 //PhysicalStart = Physical page first logical page is mapped to
358 //LogicalStart = First logical page to map
359 //NumPages = Number of pages to map (1 to 4)
360 //Handle = EMS handle logical pages are allocated to
362 /*//Create a buffer containing the page information
363 // FOR x = 0 TO NumPages - 1
364 // MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
367 // Regs.ax = 0x5000 //Map the pages in the buffer
368 // Regs.cx = NumPages //to the pageframe
370 // Regs.ds = VARSEG(MapInfo$)
371 // Regs.si = SADD(MapInfo$)
372 // InterruptX 0x67, Regs, Regs
373 // EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100 //Store the status code
379 boolean errorflag=false;
381 EMSHandle=gvar->mm.EMSHandle;
383 if(gvar->mm.EMSVer<0x40)
386 for (i=0;i<MAPPAGES;i++)
390 mov cx,[i] // logical page
391 mov al,bl // physical page
392 mov dx,[EMSHandle] // handle
415 //strcpy(str,"MM_MapXEMS: EMS error 0x");
416 strcpy(str,"MM_MapXEMS: EMS error ");
420 //printf("%s%x\n",str, err);
421 //printf("FACK! %x\n", err);
425 gvar->mmi.EMSmem = (i)*0x4000lu;
429 //==========================================================================
432 ======================
436 = Check for XMM driver
438 =======================
441 boolean MML_CheckForXMS(void)
444 boolean errorflag=false;
448 int 0x2f // query status of installed diver
459 if(errorflag==true) return false;
465 ======================
469 = Try to allocate all upper memory block
471 =======================
474 void MML_SetupXMS(global_game_variables_t *gvar)
482 mov [WORD PTR XMSaddr],bx
483 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
488 mov dx,0xffff // try for largest block possible
489 //mov ax,dx // Set available Kbytes.
490 call [DWORD PTR XMSaddr]
494 cmp bl,0xb0 // error: smaller UMB is available
498 call [DWORD PTR XMSaddr] // DX holds largest available UMB
500 jz done // another error...
517 // printf("base=%u ", base); printf("size=%u\n", size);
518 MML_UseSpace(base,size, gvar);
519 gvar->mmi.XMSmem += size*16;
520 gvar->mm.UMBbase[gvar->mm.numUMBs] = base;
522 if(gvar->mm.numUMBs < MAXUMBS)
528 ======================
532 ======================
535 void MML_ShutdownXMS(global_game_variables_t *gvar)
540 for (i=0;i<gvar->mm.numUMBs;i++)
542 base = gvar->mm.UMBbase[i];
546 call [DWORD PTR XMSaddr]
551 //==========================================================================
554 ======================
558 = Marks a range of paragraphs as usable by the memory manager
559 = This is used to mark space for the near heap, far heap, ems page frame,
560 = and upper memory blocks
562 ======================
566 extra = oldend - (segstart+seglength);
571 if(segm>1)/// || extra>=0x10000lu)
576 //MML_UseSpace(segstart, seglength, gvar);
578 printf("MML_UseSpace: Segment spans two blocks!\n");
580 printf("segm=%u ", segm);
581 printf("ex=%lu ", extra);
582 printf("old=%u ", oldend);
583 printf("start+seglen=%lu\n", segstart+seglength);
584 printf("segsta=%x ", segstart);
585 printf("len=%lu ", scan->length);
586 printf("seglen=%lu ", seglength);
587 printf("segmlen=%lu\n", segmlen);
589 //++++todo: linked list of segment!
591 void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
593 mmblocktype far *scan,far *last;
598 scan = last = gvar->mm.mmhead;
599 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
602 // search for the block that contains the range of segments
604 while (scan->start+scan->length < segstart)
611 // find out how many blocks it spans!
613 /*for(;seglength>=0x10000;seglength-=0xFFFF)
615 //printf(" seglen=%lu\n", segmlen);
620 // take the given range out of the block
622 oldend = scan->start + scan->length;
623 extra = oldend - (segstart+((unsigned)seglength));
626 printf("========================================\n");
627 printf("start=%x ", scan->start);
628 printf("old=%u ", oldend);
629 printf("start+seglen=%lu\n", segstart+seglength);
630 printf("segsta=%x ", segstart);
631 printf("len=%lu ", scan->length);
632 printf("seglen=%lu ", seglength);
634 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
635 printf("========================================\n");
639 if (segstart == scan->start)
641 last->next = scan->next; // unlink block
646 scan->length = segstart-scan->start; // shorten block
651 gvar->mm.mmnew->useptr = NULL;
653 gvar->mm.mmnew->next = scan->next;
654 scan->next = gvar->mm.mmnew;
655 gvar->mm.mmnew->start = segstart+seglength;
656 gvar->mm.mmnew->length = extra;
657 gvar->mm.mmnew->attributes = LOCKBIT;
658 }//else if(segm>0) goto segu;
662 //==========================================================================
669 = We are out of blocks, so free a purgable block
674 void MML_ClearBlock(global_game_variables_t *gvar)
676 mmblocktype far *scan;//,far *last;
678 scan = gvar->mm.mmhead->next;
682 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
684 MM_FreePtr(scan->useptr, gvar);
690 printf("MM_ClearBlock: No purgable blocks!\n");
694 //==========================================================================
701 = Grabs all space from turbo with malloc/farmalloc
702 = Allocates bufferseg misc buffer
707 void MM_Startup(global_game_variables_t *gvar)
710 //dword length,seglength;
711 dword length; word seglength;
713 word segstart;//,endfree;
715 if(gvar->mm.mmstarted)
718 gvar->mm.mmstarted = true;
719 gvar->mm.bombonerror = true;
722 // set up the linked list (everything in the free list;
724 gvar->mm.mmhead = NULL;
725 gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);
726 for(i=0;i<MAXBLOCKS-1;i++)
727 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);
728 gvar->mm.mmblocks[i].next = NULL;
731 // locked block of all memory until we punch out free space
734 gvar->mm.mmhead = gvar->mm.mmnew; // this will allways be the first node
735 gvar->mm.mmnew->start = 0;
736 gvar->mm.mmnew->length = 0xffff;
737 gvar->mm.mmnew->attributes = LOCKBIT;
738 gvar->mm.mmnew->next = NULL;
739 gvar->mm.mmrover = gvar->mm.mmhead;
742 // get all available near conventional memory segments
747 length=(word)_memavl();//(word)coreleft();
748 //start = gvar->mm.nearheap = _fmalloc(length);
750 start = (void __far *)(gvar->mm.nearheap = _nmalloc(length));
753 start = (void far *)(gvar->mm.nearheap = malloc(length));
756 length -= 16-(FP_OFF(start)&15);
757 length -= SAVENEARHEAP;
758 seglength = length / 16; // now in paragraphs
759 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
760 MML_UseSpace(segstart,seglength, gvar);
761 gvar->mmi.nearheap = length;
762 //0000printf("near: start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, (dword)seglength, length);
765 // get all available far conventional memory segments
771 // printf("farcoreleft() %lu\n", farcoreleft());
772 // printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
775 start = gvar->mm.farheap = _fmalloc(length);//start = gvar->mm.farheap = halloc(length, 1);
777 length -= 16-(FP_OFF(start)&15);
778 length -= SAVEFARHEAP;
779 seglength = length / 16; // now in paragraphs
780 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
781 MML_UseSpace(segstart,seglength, gvar);
782 gvar->mmi.farheap = length;
783 //0000printf("far: start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, (dword)seglength, length);
785 gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
787 #if !defined(__16_PM__)// && defined(__WATCOMC__)
790 // detect EMS and allocate up to 64K at page frame
792 gvar->mmi.EMSmem = 0;
793 //goto emsskip; //0000
794 for(i = 1;i < _argc;i++)
796 if(US_CheckParm(_argv[i],ParmStringsexmm) == 0)
797 goto emsskip; // param NOEMS
799 if(MML_CheckForEMS())
801 MML_SetupEMS(gvar); // allocate space
802 //16_PM: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
803 MML_UseSpace(gvar->mm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);
804 //if(gvar->pm.emm.EMSVer<0x40)
805 MM_MapEMS(gvar); // map in used pages
807 //MM_MapXEMS(gvar); // map in used pages
811 // detect XMS and get upper memory blocks
814 gvar->mmi.XMSmem = 0;
816 for(i = 1;i < _argc;i++)
818 if(US_CheckParm( _argv[i],ParmStringsexmm) == 0)
819 goto xmsskip; // param NOXMS
821 if(MML_CheckForXMS())
823 MML_SetupXMS(gvar); // allocate as many UMBs as possible
830 // allocate the misc buffer
832 gvar->mm.mmrover = gvar->mm.mmhead; // start looking for space after low block
834 MM_GetPtr(&(gvar->mm.bufferseg),BUFFERSIZE, gvar);
837 //==========================================================================
844 = Frees all conventional, EMS, and XMS allocated
849 void MM_Shutdown(global_game_variables_t *gvar)
851 if(!(gvar->mm.mmstarted))
854 _ffree(gvar->mm.farheap);// printf(" far freed\n");
856 _nfree(gvar->mm.nearheap);// printf(" near freed\n");
859 free(gvar->mm.nearheap);// printf(" near freed\n");
865 if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf(" EMS freed\n"); }
866 if(MML_CheckForXMS()){ MML_ShutdownXMS(gvar); }//printf(" XMS freed\n"); }
873 //==========================================================================
880 = Allocates an unlocked, unpurgable block
885 void MM_GetPtr (memptr *baseptr, dword size, global_game_variables_t *gvar)
887 mmblocktype far *scan,far *lastscan,far *endscan,far *purge,far *next;
889 unsigned needed,startseg;
891 needed = (size+15)/16; // convert size from bytes to paragraphs
893 GETNEWBLOCK; // fill in start and next after a spot is found
894 gvar->mm.mmnew->length = needed;
895 gvar->mm.mmnew->useptr = baseptr;
896 //if(gvar->mm.mmnew->useptr==NULL){
899 printf("MM_GetPtr\n");
901 printf(" baseptr=%Fp ", baseptr); printf("useptr=%Fp\n", gvar->mm.mmnew->useptr);
902 printf(" *baseptr=%Fp ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
903 printf(" &baseptr=%Fp ", &baseptr); printf("&useptr=%Fp\n", &(gvar->mm.mmnew->useptr));
906 //Quit(gvar, "gvar->mm.mmnew->useptr==NULL"); }
907 gvar->mm.mmnew->attributes = BASEATTRIBUTES;
910 for (search = 0; search<3; search++)
913 // first search: try to allocate right after the rover, then on up
914 // second search: search from the head pointer up to the rover
915 // third search: compress memory, then scan from start
916 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)
922 lastscan = gvar->mm.mmrover;
923 scan = gvar->mm.mmrover->next;
927 lastscan = gvar->mm.mmhead;
928 scan = gvar->mm.mmhead->next;
929 endscan = gvar->mm.mmrover;
933 lastscan = gvar->mm.mmhead;
934 scan = gvar->mm.mmhead->next;
939 startseg = lastscan->start + lastscan->length;
941 while (scan != endscan)
943 if (scan->start - startseg >= needed)
946 // got enough space between the end of lastscan and
947 // the start of scan, so throw out anything in the middle
948 // and allocate the new block
950 purge = lastscan->next;
951 lastscan->next = gvar->mm.mmnew;
952 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;
953 gvar->mm.mmnew->next = scan;
954 while ( purge != scan)
955 { // free the purgable block
958 purge = next; // purge another if not at scan
960 gvar->mm.mmrover = gvar->mm.mmnew;
961 return; // good allocation!
965 // if this block is purge level zero or locked, skip past it
967 if ( (scan->attributes & LOCKBIT)
968 || !(scan->attributes & PURGEBITS) )
971 startseg = lastscan->start + lastscan->length;
975 scan=scan->next; // look at next line
979 if (gvar->mm.bombonerror)
984 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));
985 Quit(gvar, "for stability reasons the program will shut down! wwww\n");
988 gvar->mm.mmerror = true;
991 //==========================================================================
998 = Allocates an unlocked, unpurgable block
1000 ====================
1003 void MM_FreePtr(memptr *baseptr, global_game_variables_t *gvar)
1005 mmblocktype far *scan,far *last;
1007 last = gvar->mm.mmhead;
1010 if(baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
1011 gvar->mm.mmrover = gvar->mm.mmhead;
1013 while(scan->useptr != baseptr && scan)
1021 Quit(gvar, "MM_FreePtr: Block not found!\n");
1022 //printf("MM_FreePtr: Block not found!\n"); return;
1025 last->next = scan->next;
1029 //==========================================================================
1032 =====================
1036 = Sets the purge level for a block (locked blocks cannot be made purgable)
1038 =====================
1042 void MM_SetPurge(memptr *baseptr, int purge, global_game_variables_t *gvar)
1044 mmblocktype far *start;
1046 start = gvar->mm.mmrover;
1050 if(gvar->mm.mmrover->useptr == baseptr)
1053 gvar->mm.mmrover = gvar->mm.mmrover->next;
1055 if(!gvar->mm.mmrover)
1056 gvar->mm.mmrover = gvar->mm.mmhead;
1057 else if(gvar->mm.mmrover == start)
1059 Quit (gvar, "MM_SetPurge: Block not found!");
1065 gvar->mm.mmrover->attributes &= ~PURGEBITS;
1066 gvar->mm.mmrover->attributes |= purge;
1069 //==========================================================================
1072 =====================
1076 = Locks / unlocks the block
1078 =====================
1081 void MM_SetLock(memptr *baseptr, boolean locked, global_game_variables_t *gvar)
1083 mmblocktype far *start;
1085 start = gvar->mm.mmrover;
1089 if(gvar->mm.mmrover->useptr == baseptr)
1092 gvar->mm.mmrover = gvar->mm.mmrover->next;
1094 if(!gvar->mm.mmrover)
1095 gvar->mm.mmrover = gvar->mm.mmhead;
1096 else if(gvar->mm.mmrover == start)
1098 Quit (gvar, "MM_SetLock: Block not found!");
1104 gvar->mm.mmrover->attributes &= ~LOCKBIT;
1105 gvar->mm.mmrover->attributes |= locked*LOCKBIT;
1108 //==========================================================================
1111 =====================
1115 = Throws out all purgable stuff and compresses movable blocks
1117 =====================
1120 void MM_SortMem(global_game_variables_t *gvar)
1122 mmblocktype far *scan,far *last,far *next;
1123 unsigned start,length,source,dest;//++++,oldborder;
1127 // lock down a currently playing sound
1129 /*++++ playing = SD_SoundPlaying ();
1135 playing += STARTPCSOUNDS;
1138 playing += STARTADLIBSOUNDS;
1141 MM_SetLock(&(memptr)audiosegs[playing],true);
1146 // oldborder = bordercolor;
1147 // VW_ColorBorder (15);
1152 scan = gvar->mm.mmhead;
1154 last = NULL; // shut up compiler warning
1158 if(scan->attributes & LOCKBIT)
1161 // block is locked, so try to pile later blocks right after it
1163 start = scan->start + scan->length;
1167 if(scan->attributes & PURGEBITS)
1170 // throw out the purgable block
1174 //MM_FreeBlock(scan, gvar);
1182 // push the non purgable block on top of the last moved block
1184 if(scan->start != start)
1186 length = scan->length;
1187 source = scan->start;
1189 while(length > 0xf00)
1191 movedata(source,0,dest,0,0xf00*16);
1196 movedata(source,0,dest,0,length*16);
1198 scan->start = start;
1199 *(unsigned *)scan->useptr = start;
1201 start = scan->start + scan->length;
1206 scan = scan->next; // go to next block
1209 gvar->mm.mmrover = gvar->mm.mmhead;
1214 // VW_ColorBorder (oldborder);
1217 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1220 //==========================================================================
1223 =====================
1227 =====================
1230 void MM_ShowMemory(global_game_variables_t *gvar)
1232 mmblocktype far *scan;
1238 byte scratch[160],scratch0[4096],str[16];//[[[[scratch1[160],
1240 //[[[[ VW_SetDefaultColors();
1241 //[[[[ VW_SetLineWidth(40);
1242 //++++mh temp = bufferofs;
1243 //++++mh bufferofs = 0;
1244 //[[[[ VW_SetScreen (0,0);
1245 scan = gvar->mm.mmhead;
1248 CA_OpenDebug (gvar);
1252 strcpy(scratch, AARESET);
1253 if(scan->attributes & PURGEBITS)
1254 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
1256 strcpy(scratch0, AABLUE); // medium blue = non purgable
1257 if(scan->attributes & LOCKBIT)
1258 strcpy(scratch0, AARED); // red = locked
1259 if(scan->start<=end)
1261 printf("\nend==%d\n\n", end);
1262 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1263 strcat(scratch, "End's Size: ");
1265 strcat (scratch,str);
1266 strcat(scratch, "\nscan->start's Size: ");
1267 ultoa (scan->start,str,10);
1268 strcat (scratch,str);
1269 write(gvar->handle.debughandle,scratch,strlen(scratch));
1270 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1273 end = scan->start+(scan->length)-1;
1274 //++++ chy = scan->start/320;
1275 //++++ chx = scan->start%320;
1276 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1277 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1279 //++++ modexClearRegion(page, chx, chy, 4, 4, color);
1281 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1282 for(w=(scan->start)/80;w<=end/80;w++)
1284 //printf("+ %u %lu\n", w, scan->length);
1285 strcat(scratch0, "+");
1287 //++==++==optional strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1288 //++++ VW_Plot(scan->start,0,15);
1289 //++++ modexClearRegion(page, chx, chy, 4, 4, 15);
1290 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1292 //wwww=(dword)(scan->next->start)-(dword)scan->start;
1293 //wwww=(dword)scan->start+(dword)(scan->next->start);
1294 if (scan->next && scan->next->start >= end+1)
1296 strcat(scratch0, AARESET);
1297 //++==++==optional strcat(scratch0, "\n");
1298 strcat(scratch0,AAGREEN);
1299 for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
1300 //for(w=(wwww)/80;w<=((end+1)/80);w++)
1301 //for(w=(end+1)/80;w<=((wwww)/80);w++)
1303 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
1304 strcat(scratch0,"0");
1306 //printf("==================\n");
1307 //printf("w=%u wwww=%lu start=%04x next=%04x end=%lu\n", w/80, wwww/80, scan->start, (scan->next->start), end+1);
1308 //printf("==================\n");
1309 strcat(scratch0, "\n");
1311 }/*else {//if(scan->next->start <= scan->start){
1312 scan->next->start=scan->start+0x1000;
1313 wwww=(dword)(scan->next->start)-(dword)scan->start;
1314 strcat(scratch0, AARESET);
1315 strcat(scratch0, "\n");
1316 strcat(scratch0,AAGREEN);
1317 for(w=(end+1);w<=(0x1000/80);w++)
1319 //printf("0 %x %x %u\n", scan->start, w);
1320 strcat(scratch0,"0");
1322 printf("================\n");
1323 printf("w=%x start=%x next=%x end=%u %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1324 printf("================\n");
1327 strcat(scratch0, AARESET);
1328 //strcat(scratch0,"\n");
1329 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1331 // chx+=scan->next->start;
1332 // modexClearRegion(page, chx, chy, 4, 4, 2);
1334 //modexhlin(page, end+1,scan->next->start, chy, 0);
1335 /* y = scan->start/320;
1336 x = scan->start%320;
1337 VW_Hlin(x,x+end,y,color);
1339 //++++ VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1340 strcat(scratch,"Seg:");
1341 ultoa (scan->start,str,16);
1342 strcat (scratch,str);
1343 strcat (scratch,"\tSize:");
1344 ultoa ((unsigned)scan->length,str,10);
1345 strcat (scratch,str);
1346 strcat (scratch,"\tOwner:0x");
1347 owner = (unsigned)scan->useptr;
1348 ultoa (owner,str,16);
1349 strcat (scratch,str);
1350 strcat (scratch,"\n");
1351 write(gvar->handle.debughandle,scratch,strlen(scratch));
1352 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1353 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1355 //fprintf(stdout, "%s", scratch);
1359 /*strcpy(scratch1, AARESET);
1360 strcat(scratch1, "========================================\n");
1361 strcat(scratch1, "near= ");
1362 ultoa (*(gvar->mm.nearheap),str,10);
1363 strcat (scratch1,str);
1364 strcat(scratch1, " far= ");
1365 ultoa (*(gvar->mm.farheap),str,10);
1366 strcat (scratch1,str);
1367 strcat(scratch1, "\n");
1368 //strcat(scratch1, "&near= %Fp ", &(gvar->mm.nearheap));
1369 //strcat(scratch1, "&far= %Fp", &(gvar->mm.farheap));
1370 //strcat(scratch1, "\n");
1371 strcat(scratch1, "========================================\n");
1372 write(gvar->handle.debughandle,scratch1,strlen(scratch1));*/
1375 CA_CloseDebug (gvar);
1378 //**** VW_SetLineWidth(64);
1379 //++++mh bufferofs = temp;
1382 //==========================================================================
1385 =====================
1389 =====================
1392 void MM_DumpData(global_game_variables_t *gvar)
1394 mmblocktype far *scan,far *best;
1395 long lowest,oldlowest;
1401 _nfree(gvar->mm.nearheap);
1404 free(gvar->mm.nearheap);
1407 dumpfile = fopen ("mmdump.16b","w");
1410 dumpfile = fopen ("mmdump.16w","w");
1413 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1423 scan = gvar->mm.mmhead;
1426 owner = (unsigned)scan->useptr;
1428 if (owner && owner<lowest && owner > oldlowest)
1437 if (lowest != 0xffff)
1439 if (best->attributes & PURGEBITS)
1443 if (best->attributes & LOCKBIT)
1447 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1448 ,(unsigned)lowest,lock,purge,best->length);
1451 } while (lowest != 0xffff);
1454 printf("MMDUMP.16 created.\n");
1457 //==========================================================================
1461 ======================
1465 = Returns the total free space without purging
1467 ======================
1470 dword MM_UnusedMemory(global_game_variables_t *gvar)
1473 mmblocktype far *scan;
1476 scan = gvar->mm.mmhead;
1480 free += scan->next->start - (scan->start + scan->length);
1488 //==========================================================================
1492 ======================
1496 = Returns the total free space with purging
1498 ======================
1501 dword MM_TotalFree(global_game_variables_t *gvar)
1504 mmblocktype far *scan;
1507 scan = gvar->mm.mmhead;
1511 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1512 free += scan->length;
1513 free += scan->next->start - (scan->start + scan->length);
1521 //==========================================================================
1524 =====================
1528 =====================
1531 void MM_Report_(global_game_variables_t *gvar)
1533 printf("========================================\n");
1534 printf(" MM_Report_\n");
1535 printf("========================================\n");
1536 if(MML_CheckForEMS())
1538 printf(" %cLIMEMS %u\n", 0xC9, gvar->pm.emm.EMSPresent);
1539 printf(" %c%cEMM v%x.%x available\n", 0xC7, 0xC4, gvar->pm.emm.EMSVer>>4,gvar->pm.emm.EMSVer&0x0F);
1540 printf(" %c%ctotalEMSpages: %u ", 0xC7, 0xC4, gvar->pm.emm.totalEMSpages); printf("freeEMSpages: %u\n", gvar->pm.emm.freeEMSpages);
1541 printf(" %c%cEMSPageFrame: %04x\n", 0xC7, 0xC4, gvar->pm.emm.EMSPageFrame);
1542 printf(" %c%cEMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.EMSmem);
1544 if(MML_CheckForXMS())
1546 printf(" %cXMS %u\n", 0xC9, gvar->pm.xmm.XMSPresent);
1547 printf(" %c%cXMS v%x.%x available\n", 0xC7, 0xC4, XMSVer>>8,XMSVer&0x0F);
1548 printf(" %c%cXMSDriver: %Fp\n", 0xC7, 0xC4, XMSDriver);
1549 printf(" %c%cXMSHandle: %04x\n", 0xC7, 0xC4, gvar->pm.xmm.XMSHandle);
1550 printf(" %c%cXMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.XMSmem);
1552 printf(" %cConv. %u\n", 0xC9, gvar->pm.mm.MainPresent); DebugMemory_(gvar, 0);
1553 //printf("mainmem: %lu\n", gvar->mmi.mainmem);
1554 //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);
1555 //printf(" UnusedMemory: %lu\n", MM_UnusedMemory(gvar));
1556 printf("nearheap: %lu ", gvar->mmi.nearheap); printf("farheap: %lu\n", gvar->mmi.farheap);
1559 //==========================================================================
1562 =====================
1566 =====================
1569 void MM_EMSerr(byte *stri, byte err)
1571 //Returns a text string describing the error code in EMS.Error.
1575 strcat(stri, "successful");
1578 strcat(stri, "internal error");
1581 strcat(stri, "hardware malfunction");
1584 strcat(stri, "busy .. retry later");
1587 strcat(stri, "invalid handle");
1590 strcat(stri, "undefined function requested by application");
1593 strcat(stri, "no more handles available");
1596 strcat(stri, "error in save or restore of mapping context");
1599 strcat(stri, "insufficient memory pages in system");
1602 strcat(stri, "insufficient memory pages available");
1605 strcat(stri, "zero pages requested");
1608 strcat(stri, "invalid logical page number encountered");
1611 strcat(stri, "invalid physical page number encountered");
1614 strcat(stri, "page-mapping hardware state save area is full");
1617 strcat(stri, "save of mapping context failed");
1620 strcat(stri, "restore of mapping context failed");
1623 strcat(stri, "undefined subfunction");
1626 strcat(stri, "undefined attribute type");
1629 strcat(stri, "feature not supported");
1632 strcat(stri, "successful, but a portion of the source region has been overwritten");
1635 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1638 strcat(stri, "conventional and expanded memory regions overlap");
1641 strcat(stri, "offset within logical page exceeds size of logical page");
1644 strcat(stri, "region length exceeds 1 MB");
1647 strcat(stri, "source and destination EMS regions have same handle and overlap");
1650 strcat(stri, "memory source or destination type undefined");
1653 strcat(stri, "specified alternate map register or DMA register set not supported");
1656 strcat(stri, "all alternate map register or DMA register sets currently allocated");
1659 strcat(stri, "alternate map register or DMA register sets not supported");
1662 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1665 strcat(stri, "dedicated DMA channels not supported");
1668 strcat(stri, "specified dedicated DMA channel not supported");
1671 strcat(stri, "no such handle name");
1674 strcat(stri, "a handle found had no name, or duplicate handle name");
1677 strcat(stri, "attempted to wrap around 1M conventional address space");
1680 strcat(stri, "source array corrupted");
1683 strcat(stri, "operating system denied access");
1686 strcat(stri, "undefined error");
1690 //==========================================================================
1693 =====================
1697 =====================
1700 void MM_BombOnError(boolean bomb, global_game_variables_t *gvar)
1702 gvar->mm.bombonerror = bomb;
1705 /*void MM_GetNewBlock(global_game_variables_t *gvar)
1707 if(!gvar->mm.mmfree)
1708 MML_ClearBlock(gvar);
1709 gvar->mm.mmnew=gvar->mm.mmfree;
1710 gvar->mm.mmfree=gvar->mm.mmfree->next;
1711 if(!(gvar->mm.mmnew=gvar->mm.mmfree))
1713 printf("MM_GETNEWBLOCK: No free blocks!\n");
1716 gvar->mm.mmfree=gvar->mm.mmfree->next;
1719 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
1722 x->next=gvar->mm.mmfree;
1726 void xms_call(byte v, global_game_variables_t *gvar)
1728 dword XMSDriver = gvar->pm.xmm.XMSDriver;
1731 call [DWORD PTR XMSDriver]
1735 /*void MM_seguin(void)
1745 void MM_segude(void)
1753 pull data from far and put it into ds var