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)
91 boolean emmcfems = false;
92 word EMSPageFrame = 0;
94 static char emmname[] = "EMMXXXX0"; //fix by andrius4669
96 mov dx,OFFSET emmname //fix by andrius4669
98 int EMM_INT // try to open EMMXXXX0 device
104 int EMM_INT // get device info
112 int EMM_INT // get status
118 int EMM_INT // close handle
125 int EMS_INT // find the page frame address
128 mov [EMSPageFrame],bx
156 // Pageframe switch to determine if there is one!
161 #if defined(__DEBUG_PM__) || defined(__DEBUG_MM__)
162 printf("MML_CheckForEMS: EMS error No Pageframe!\nAddress detected to be %04x\n", EMSPageFrame);
164 }else if(!emmcfems)// if there is an error and page frame is not 0000
166 strcpy(str,"MML_CheckForEMS: EMS error ");
176 ======================
180 =======================
183 byte MML_SetupEMS(global_game_variables_t *gvar)
187 boolean errorflag=false;
189 unsigned int EMSVer = 0;
191 unsigned totalEMSpages,freeEMSpages,EMSPageFrame,EMSpagesmapped,EMSHandle;
192 totalEMSpages = freeEMSpages = EMSPageFrame = EMSpagesmapped = 0;
196 int EMS_INT // make sure EMS hardware is present
198 //mov [EMS_status],ah
205 mov [EMSVer],ax // set EMSVer
206 cmp al,0x32 // only work on ems 3.2 or greater
210 int EMS_INT // find the page frame address
213 mov [EMSPageFrame],bx
216 int EMS_INT // find out how much EMS is there
219 mov [totalEMSpages],dx
220 mov [freeEMSpages],bx
222 jz noEMS // no EMS at all to allocate
226 cmp bx,[freeEMSpages]
228 mov bx,[freeEMSpages]
238 jle getpages // there is only 1,2,3,or 4 pages
239 mov bx,4 // we can't use more than 4 pages
247 mov [EMSpagesmapped],bx
248 mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS
274 strcpy(str,"MM_SetupEMS: EMS error ");
279 gvar->mm.totalEMSpages=totalEMSpages;
280 gvar->mm.freeEMSpages=freeEMSpages;
281 gvar->mm.EMSPageFrame=EMSPageFrame;
282 gvar->mm.EMSpagesmapped=EMSpagesmapped;
283 gvar->mm.EMSHandle=EMSHandle;
284 gvar->mm.EMSVer=EMSVer;
290 ======================
294 =======================
297 void MML_ShutdownEMS(global_game_variables_t *gvar)
299 boolean errorflag=false;
300 unsigned EMSHandle=gvar->mm.EMSHandle;
319 Quit (gvar, "MML_ShutdownEMS: Error freeing EMS!\n"); //++++ add something
327 = Maps the 64k of EMS used by memory manager into the page frame
328 = for general use. This only needs to be called if you are keeping
329 = other things in EMS.
334 byte MM_MapEMS(global_game_variables_t *gvar)
339 boolean errorflag=false;
341 EMSHandle=gvar->mm.EMSHandle;
343 for (i=0;i<4/*MAPPAGES*/;i++)
347 mov bx,[i] // logical page
348 mov al,bl // physical page
349 mov dx,[EMSHandle] // handle
372 strcpy(str,"MM_MapEMS: EMS error ");
378 gvar->mmi.EMSmem = (i)*0x4000lu;
382 byte MM_MapXEMS(global_game_variables_t *gvar)
384 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
386 //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
387 //PhysicalStart = Physical page first logical page is mapped to
388 //LogicalStart = First logical page to map
389 //NumPages = Number of pages to map (1 to 4)
390 //Handle = EMS handle logical pages are allocated to
392 /*//Create a buffer containing the page information
393 // FOR x = 0 TO NumPages - 1
394 // MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
397 // Regs.ax = 0x5000 //Map the pages in the buffer
398 // Regs.cx = NumPages //to the pageframe
400 // Regs.ds = VARSEG(MapInfo$)
401 // Regs.si = SADD(MapInfo$)
402 // InterruptX 0x67, Regs, Regs
403 // EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100 //Store the status code
409 boolean errorflag=false;
411 EMSHandle=gvar->mm.EMSHandle;
413 if(gvar->mm.EMSVer<0x40)
416 for (i=0;i<MAPPAGES;i++)
420 mov cx,[i] // logical page
421 mov al,bl // physical page
422 mov dx,[EMSHandle] // handle
445 //strcpy(str,"MM_MapXEMS: EMS error 0x");
446 strcpy(str,"MM_MapXEMS: EMS error ");
450 //printf("%s%x\n",str, err);
451 //printf("FACK! %x\n", err);
455 gvar->mmi.EMSmem = (i)*0x4000lu;
459 //==========================================================================
462 ======================
466 = Check for XMM driver
468 =======================
471 boolean MML_CheckForXMS(void)
474 boolean errorflag=false;
478 int 0x2f // query status of installed diver
489 if(errorflag==true) return false;
495 ======================
499 = Try to allocate all upper memory block
501 =======================
504 void MML_SetupXMS(global_game_variables_t *gvar)
512 mov [WORD PTR XMSaddr],bx
513 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
518 mov dx,0xffff // try for largest block possible
519 //mov ax,dx // Set available Kbytes.
520 call [DWORD PTR XMSaddr]
524 cmp bl,0xb0 // error: smaller UMB is available
528 call [DWORD PTR XMSaddr] // DX holds largest available UMB
530 jz done // another error...
547 // printf("base=%u ", base); printf("size=%u\n", size);
548 MML_UseSpace(base,size, gvar);
549 gvar->mmi.XMSmem += size*16;
550 gvar->mm.UMBbase[gvar->mm.numUMBs] = base;
552 if(gvar->mm.numUMBs < MAXUMBS)
558 ======================
562 ======================
565 void MML_ShutdownXMS(global_game_variables_t *gvar)
570 for (i=0;i<gvar->mm.numUMBs;i++)
572 base = gvar->mm.UMBbase[i];
576 call [DWORD PTR XMSaddr]
581 //==========================================================================
584 ======================
588 = Marks a range of paragraphs as usable by the memory manager
589 = This is used to mark space for the near heap, far heap, ems page frame,
590 = and upper memory blocks
592 ======================
596 extra = oldend - (segstart+seglength);
601 if(segm>1)/// || extra>=0x10000lu)
606 //MML_UseSpace(segstart, seglength, gvar);
608 printf("MML_UseSpace: Segment spans two blocks!\n");
610 printf("segm=%u ", segm);
611 printf("ex=%lu ", extra);
612 printf("old=%u ", oldend);
613 printf("start+seglen=%lu\n", segstart+seglength);
614 printf("segsta=%x ", segstart);
615 printf("len=%lu ", scan->length);
616 printf("seglen=%lu ", seglength);
617 printf("segmlen=%lu\n", segmlen);
619 //++++todo: linked list of segment!
621 void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
623 mmblocktype far *scan,far *last;
628 scan = last = gvar->mm.mmhead;
629 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
632 // search for the block that contains the range of segments
634 while (scan->start+scan->length < segstart)
641 // find out how many blocks it spans!
643 /*for(;seglength>=0x10000;seglength-=0xFFFF)
645 //printf(" seglen=%lu\n", segmlen);
650 // take the given range out of the block
652 oldend = scan->start + scan->length;
653 extra = oldend - (segstart+((unsigned)seglength));
656 printf("========================================\n");
657 printf("start=%x ", scan->start);
658 printf("old=%u ", oldend);
659 printf("start+seglen=%lu\n", segstart+seglength);
660 printf("segsta=%x ", segstart);
661 printf("len=%lu ", scan->length);
662 printf("seglen=%lu ", seglength);
664 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
665 printf("========================================\n");
669 if (segstart == scan->start)
671 last->next = scan->next; // unlink block
676 scan->length = segstart-scan->start; // shorten block
681 gvar->mm.mmnew->useptr = NULL;
683 gvar->mm.mmnew->next = scan->next;
684 scan->next = gvar->mm.mmnew;
685 gvar->mm.mmnew->start = segstart+seglength;
686 gvar->mm.mmnew->length = extra;
687 gvar->mm.mmnew->attributes = LOCKBIT;
688 }//else if(segm>0) goto segu;
692 //==========================================================================
699 = We are out of blocks, so free a purgable block
704 void MML_ClearBlock(global_game_variables_t *gvar)
706 mmblocktype far *scan;//,far *last;
708 scan = gvar->mm.mmhead->next;
712 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
714 MM_FreePtr(scan->useptr, gvar);
720 printf("MM_ClearBlock: No purgable blocks!\n");
724 //==========================================================================
731 = Grabs all space from turbo with malloc/farmalloc
732 = Allocates bufferseg misc buffer
737 void MM_Startup(global_game_variables_t *gvar)
740 //dword length,seglength;
741 dword length; word seglength;
743 word segstart;//,endfree;
745 if(gvar->mm.mmstarted)
748 gvar->mm.mmstarted = true;
749 gvar->mm.bombonerror = true;
752 // set up the linked list (everything in the free list;
754 gvar->mm.mmhead = NULL;
755 gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);
756 for(i=0;i<MAXBLOCKS-1;i++)
757 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);
758 gvar->mm.mmblocks[i].next = NULL;
761 // locked block of all memory until we punch out free space
764 gvar->mm.mmhead = gvar->mm.mmnew; // this will allways be the first node
765 gvar->mm.mmnew->start = 0;
766 gvar->mm.mmnew->length = 0xffff;
767 gvar->mm.mmnew->attributes = LOCKBIT;
768 gvar->mm.mmnew->next = NULL;
769 gvar->mm.mmrover = gvar->mm.mmhead;
772 // get all available near conventional memory segments
777 length=(word)_memavl();//(word)coreleft();
778 //start = gvar->mm.nearheap = _fmalloc(length);
780 start = (void __far *)(gvar->mm.nearheap = _nmalloc(length));
783 start = (void far *)(gvar->mm.nearheap = malloc(length));
786 length -= 16-(FP_OFF(start)&15);
787 length -= SAVENEARHEAP;
788 seglength = length / 16; // now in paragraphs
789 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
790 MML_UseSpace(segstart,seglength, gvar);
791 gvar->mmi.nearheap = length;
792 //0000printf("near: start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, (dword)seglength, length);
795 // get all available far conventional memory segments
801 // printf("farcoreleft() %lu\n", farcoreleft());
802 // printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
805 start = gvar->mm.farheap = _fmalloc(length);//start = gvar->mm.farheap = halloc(length, 1);
807 length -= 16-(FP_OFF(start)&15);
808 length -= SAVEFARHEAP;
809 seglength = length / 16; // now in paragraphs
810 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
811 MML_UseSpace(segstart,seglength, gvar);
812 gvar->mmi.farheap = length;
813 //0000printf("far: start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, (dword)seglength, length);
815 gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
817 #if !defined(__16_PM__)// && defined(__WATCOMC__)
820 // detect EMS and allocate up to 64K at page frame
822 gvar->mmi.EMSmem = 0;
823 //goto emsskip; //0000
824 for(i = 1;i < _argc;i++)
826 if(US_CheckParm(_argv[i],ParmStringsexmm) == 0)
827 goto emsskip; // param NOEMS
829 if(MML_CheckForEMS())
831 MML_SetupEMS(gvar); // allocate space
832 //16_PM: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
833 MML_UseSpace(gvar->mm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);
834 //if(gvar->pm.emm.EMSVer<0x40)
835 MM_MapEMS(gvar); // map in used pages
837 //MM_MapXEMS(gvar); // map in used pages
841 // detect XMS and get upper memory blocks
844 gvar->mmi.XMSmem = 0;
846 for(i = 1;i < _argc;i++)
848 if(US_CheckParm( _argv[i],ParmStringsexmm) == 0)
849 goto xmsskip; // param NOXMS
851 if(MML_CheckForXMS())
853 MML_SetupXMS(gvar); // allocate as many UMBs as possible
860 // allocate the misc buffer
862 gvar->mm.mmrover = gvar->mm.mmhead; // start looking for space after low block
864 MM_GetPtr(&(gvar->mm.bufferseg),BUFFERSIZE, gvar);
867 //==========================================================================
874 = Frees all conventional, EMS, and XMS allocated
879 void MM_Shutdown(global_game_variables_t *gvar)
881 if(!(gvar->mm.mmstarted))
884 _ffree(gvar->mm.farheap);// printf(" far freed\n");
886 _nfree(gvar->mm.nearheap);// printf(" near freed\n");
889 free(gvar->mm.nearheap);// printf(" near freed\n");
895 if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf(" EMS freed\n"); }
896 if(MML_CheckForXMS()){ MML_ShutdownXMS(gvar); }//printf(" XMS freed\n"); }
903 //==========================================================================
910 = Allocates an unlocked, unpurgable block
915 void MM_GetPtr (memptr *baseptr, dword size, global_game_variables_t *gvar)
917 mmblocktype far *scan,far *lastscan,far *endscan,far *purge,far *next;
919 unsigned needed,startseg;
921 needed = (size+15)/16; // convert size from bytes to paragraphs
923 GETNEWBLOCK; // fill in start and next after a spot is found
924 gvar->mm.mmnew->length = needed;
925 gvar->mm.mmnew->useptr = baseptr;
926 //if(gvar->mm.mmnew->useptr==NULL){
929 printf("MM_GetPtr\n");
931 printf(" baseptr=%Fp ", baseptr); printf("useptr=%Fp\n", gvar->mm.mmnew->useptr);
932 printf(" *baseptr=%Fp ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
933 printf(" &baseptr=%Fp ", &baseptr); printf("&useptr=%Fp\n", &(gvar->mm.mmnew->useptr));
936 //Quit(gvar, "gvar->mm.mmnew->useptr==NULL"); }
937 gvar->mm.mmnew->attributes = BASEATTRIBUTES;
940 for (search = 0; search<3; search++)
943 // first search: try to allocate right after the rover, then on up
944 // second search: search from the head pointer up to the rover
945 // third search: compress memory, then scan from start
946 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)
952 lastscan = gvar->mm.mmrover;
953 scan = gvar->mm.mmrover->next;
957 lastscan = gvar->mm.mmhead;
958 scan = gvar->mm.mmhead->next;
959 endscan = gvar->mm.mmrover;
963 lastscan = gvar->mm.mmhead;
964 scan = gvar->mm.mmhead->next;
969 startseg = lastscan->start + lastscan->length;
971 while (scan != endscan)
973 if (scan->start - startseg >= needed)
976 // got enough space between the end of lastscan and
977 // the start of scan, so throw out anything in the middle
978 // and allocate the new block
980 purge = lastscan->next;
981 lastscan->next = gvar->mm.mmnew;
982 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;
983 gvar->mm.mmnew->next = scan;
984 while ( purge != scan)
985 { // free the purgable block
988 purge = next; // purge another if not at scan
990 gvar->mm.mmrover = gvar->mm.mmnew;
991 return; // good allocation!
995 // if this block is purge level zero or locked, skip past it
997 if ( (scan->attributes & LOCKBIT)
998 || !(scan->attributes & PURGEBITS) )
1001 startseg = lastscan->start + lastscan->length;
1005 scan=scan->next; // look at next line
1009 if (gvar->mm.bombonerror)
1014 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));
1015 Quit(gvar, "for stability reasons the program will shut down! wwww\n");
1018 gvar->mm.mmerror = true;
1021 //==========================================================================
1024 ====================
1028 = Allocates an unlocked, unpurgable block
1030 ====================
1033 void MM_FreePtr(memptr *baseptr, global_game_variables_t *gvar)
1035 mmblocktype far *scan,far *last;
1037 last = gvar->mm.mmhead;
1040 if(baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
1041 gvar->mm.mmrover = gvar->mm.mmhead;
1043 while(scan->useptr != baseptr && scan)
1051 Quit(gvar, "MM_FreePtr: Block not found!\n");
1052 //printf("MM_FreePtr: Block not found!\n"); return;
1055 last->next = scan->next;
1059 //==========================================================================
1062 =====================
1066 = Sets the purge level for a block (locked blocks cannot be made purgable)
1068 =====================
1072 void MM_SetPurge(memptr *baseptr, int purge, global_game_variables_t *gvar)
1074 mmblocktype far *start;
1076 start = gvar->mm.mmrover;
1080 if(gvar->mm.mmrover->useptr == baseptr)
1083 gvar->mm.mmrover = gvar->mm.mmrover->next;
1085 if(!gvar->mm.mmrover)
1086 gvar->mm.mmrover = gvar->mm.mmhead;
1087 else if(gvar->mm.mmrover == start)
1089 Quit (gvar, "MM_SetPurge: Block not found!");
1095 gvar->mm.mmrover->attributes &= ~PURGEBITS;
1096 gvar->mm.mmrover->attributes |= purge;
1099 //==========================================================================
1102 =====================
1106 = Locks / unlocks the block
1108 =====================
1111 void MM_SetLock(memptr *baseptr, boolean locked, global_game_variables_t *gvar)
1113 mmblocktype far *start;
1115 start = gvar->mm.mmrover;
1119 if(gvar->mm.mmrover->useptr == baseptr)
1122 gvar->mm.mmrover = gvar->mm.mmrover->next;
1124 if(!gvar->mm.mmrover)
1125 gvar->mm.mmrover = gvar->mm.mmhead;
1126 else if(gvar->mm.mmrover == start)
1128 Quit (gvar, "MM_SetLock: Block not found!");
1134 gvar->mm.mmrover->attributes &= ~LOCKBIT;
1135 gvar->mm.mmrover->attributes |= locked*LOCKBIT;
1138 //==========================================================================
1141 =====================
1145 = Throws out all purgable stuff and compresses movable blocks
1147 =====================
1150 void MM_SortMem(global_game_variables_t *gvar)
1152 mmblocktype far *scan,far *last,far *next;
1153 unsigned start,length,source,dest;//++++,oldborder;
1157 // lock down a currently playing sound
1159 /*++++ playing = SD_SoundPlaying ();
1165 playing += STARTPCSOUNDS;
1168 playing += STARTADLIBSOUNDS;
1171 MM_SetLock(&(memptr)audiosegs[playing],true);
1176 // oldborder = bordercolor;
1177 // VW_ColorBorder (15);
1182 scan = gvar->mm.mmhead;
1184 last = NULL; // shut up compiler warning
1188 if(scan->attributes & LOCKBIT)
1191 // block is locked, so try to pile later blocks right after it
1193 start = scan->start + scan->length;
1197 if(scan->attributes & PURGEBITS)
1200 // throw out the purgable block
1204 //MM_FreeBlock(scan, gvar);
1212 // push the non purgable block on top of the last moved block
1214 if(scan->start != start)
1216 length = scan->length;
1217 source = scan->start;
1219 while(length > 0xf00)
1221 movedata(source,0,dest,0,0xf00*16);
1226 movedata(source,0,dest,0,length*16);
1228 scan->start = start;
1229 *(unsigned *)scan->useptr = start;
1231 start = scan->start + scan->length;
1236 scan = scan->next; // go to next block
1239 gvar->mm.mmrover = gvar->mm.mmhead;
1244 // VW_ColorBorder (oldborder);
1247 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1250 //==========================================================================
1253 =====================
1257 =====================
1260 void MM_ShowMemory(global_game_variables_t *gvar)
1262 mmblocktype far *scan;
1268 byte scratch[160],scratch0[4096],str[16];//[[[[scratch1[160],
1270 //[[[[ VW_SetDefaultColors();
1271 //[[[[ VW_SetLineWidth(40);
1272 //++++mh temp = bufferofs;
1273 //++++mh bufferofs = 0;
1274 //[[[[ VW_SetScreen (0,0);
1275 scan = gvar->mm.mmhead;
1278 CA_OpenDebug (gvar);
1282 strcpy(scratch, AARESET);
1283 if(scan->attributes & PURGEBITS)
1284 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
1286 strcpy(scratch0, AABLUE); // medium blue = non purgable
1287 if(scan->attributes & LOCKBIT)
1288 strcpy(scratch0, AARED); // red = locked
1289 if(scan->start<=end)
1291 printf("\nend==%d\n\n", end);
1292 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1293 strcat(scratch, "End's Size: ");
1295 strcat (scratch,str);
1296 strcat(scratch, "\nscan->start's Size: ");
1297 ultoa (scan->start,str,10);
1298 strcat (scratch,str);
1299 write(gvar->handle.debughandle,scratch,strlen(scratch));
1300 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1303 end = scan->start+(scan->length)-1;
1304 //++++ chy = scan->start/320;
1305 //++++ chx = scan->start%320;
1306 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1307 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1309 //++++ modexClearRegion(page, chx, chy, 4, 4, color);
1311 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1312 for(w=(scan->start)/80;w<=end/80;w++)
1314 //printf("+ %u %lu\n", w, scan->length);
1315 strcat(scratch0, "+");
1317 //++==++==optional strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1318 //++++ VW_Plot(scan->start,0,15);
1319 //++++ modexClearRegion(page, chx, chy, 4, 4, 15);
1320 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1322 //wwww=(dword)(scan->next->start)-(dword)scan->start;
1323 //wwww=(dword)scan->start+(dword)(scan->next->start);
1324 if (scan->next && scan->next->start >= end+1)
1326 strcat(scratch0, AARESET);
1327 //++==++==optional strcat(scratch0, "\n");
1328 strcat(scratch0,AAGREEN);
1329 for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
1330 //for(w=(wwww)/80;w<=((end+1)/80);w++)
1331 //for(w=(end+1)/80;w<=((wwww)/80);w++)
1333 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
1334 strcat(scratch0,"0");
1336 //printf("==================\n");
1337 //printf("w=%u wwww=%lu start=%04x next=%04x end=%lu\n", w/80, wwww/80, scan->start, (scan->next->start), end+1);
1338 //printf("==================\n");
1339 strcat(scratch0, "\n");
1341 }/*else {//if(scan->next->start <= scan->start){
1342 scan->next->start=scan->start+0x1000;
1343 wwww=(dword)(scan->next->start)-(dword)scan->start;
1344 strcat(scratch0, AARESET);
1345 strcat(scratch0, "\n");
1346 strcat(scratch0,AAGREEN);
1347 for(w=(end+1);w<=(0x1000/80);w++)
1349 //printf("0 %x %x %u\n", scan->start, w);
1350 strcat(scratch0,"0");
1352 printf("================\n");
1353 printf("w=%x start=%x next=%x end=%u %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1354 printf("================\n");
1357 strcat(scratch0, AARESET);
1358 //strcat(scratch0,"\n");
1359 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1361 // chx+=scan->next->start;
1362 // modexClearRegion(page, chx, chy, 4, 4, 2);
1364 //modexhlin(page, end+1,scan->next->start, chy, 0);
1365 /* y = scan->start/320;
1366 x = scan->start%320;
1367 VW_Hlin(x,x+end,y,color);
1369 //++++ VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1370 strcat(scratch,"Seg:");
1371 ultoa (scan->start,str,16);
1372 strcat (scratch,str);
1373 strcat (scratch,"\tSize:");
1374 ultoa ((unsigned)scan->length,str,10);
1375 strcat (scratch,str);
1376 strcat (scratch,"\tOwner:0x");
1377 owner = (unsigned)scan->useptr;
1378 ultoa (owner,str,16);
1379 strcat (scratch,str);
1380 strcat (scratch,"\n");
1381 write(gvar->handle.debughandle,scratch,strlen(scratch));
1382 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1383 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1385 //fprintf(stdout, "%s", scratch);
1389 /*strcpy(scratch1, AARESET);
1390 strcat(scratch1, "========================================\n");
1391 strcat(scratch1, "near= ");
1392 ultoa (*(gvar->mm.nearheap),str,10);
1393 strcat (scratch1,str);
1394 strcat(scratch1, " far= ");
1395 ultoa (*(gvar->mm.farheap),str,10);
1396 strcat (scratch1,str);
1397 strcat(scratch1, "\n");
1398 //strcat(scratch1, "&near= %Fp ", &(gvar->mm.nearheap));
1399 //strcat(scratch1, "&far= %Fp", &(gvar->mm.farheap));
1400 //strcat(scratch1, "\n");
1401 strcat(scratch1, "========================================\n");
1402 write(gvar->handle.debughandle,scratch1,strlen(scratch1));*/
1405 CA_CloseDebug (gvar);
1408 //**** VW_SetLineWidth(64);
1409 //++++mh bufferofs = temp;
1412 //==========================================================================
1415 =====================
1419 =====================
1422 void MM_DumpData(global_game_variables_t *gvar)
1424 mmblocktype far *scan,far *best;
1425 long lowest,oldlowest;
1431 _nfree(gvar->mm.nearheap);
1434 free(gvar->mm.nearheap);
1437 dumpfile = fopen ("mmdump.16b","w");
1440 dumpfile = fopen ("mmdump.16w","w");
1443 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1453 scan = gvar->mm.mmhead;
1456 owner = (unsigned)scan->useptr;
1458 if (owner && owner<lowest && owner > oldlowest)
1467 if (lowest != 0xffff)
1469 if (best->attributes & PURGEBITS)
1473 if (best->attributes & LOCKBIT)
1477 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1478 ,(unsigned)lowest,lock,purge,best->length);
1481 } while (lowest != 0xffff);
1484 printf("MMDUMP.16 created.\n");
1487 //==========================================================================
1491 ======================
1495 = Returns the total free space without purging
1497 ======================
1500 dword MM_UnusedMemory(global_game_variables_t *gvar)
1503 mmblocktype far *scan;
1506 scan = gvar->mm.mmhead;
1510 free += scan->next->start - (scan->start + scan->length);
1518 //==========================================================================
1522 ======================
1526 = Returns the total free space with purging
1528 ======================
1531 dword MM_TotalFree(global_game_variables_t *gvar)
1534 mmblocktype far *scan;
1537 scan = gvar->mm.mmhead;
1541 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1542 free += scan->length;
1543 free += scan->next->start - (scan->start + scan->length);
1551 //==========================================================================
1554 =====================
1558 =====================
1561 void MM_Report_(global_game_variables_t *gvar)
1563 printf("========================================\n");
1564 printf(" MM_Report_\n");
1565 printf("========================================\n");
1566 if(MML_CheckForEMS())
1568 printf(" %cLIMEMS %u\n", 0xC9, gvar->pm.emm.EMSPresent);
1569 printf(" %c%cEMM v%x.%x available\n", 0xC7, 0xC4, gvar->pm.emm.EMSVer>>4,gvar->pm.emm.EMSVer&0x0F);
1570 printf(" %c%ctotalEMSpages: %u ", 0xC7, 0xC4, gvar->pm.emm.totalEMSpages); printf("freeEMSpages: %u\n", gvar->pm.emm.freeEMSpages);
1571 printf(" %c%cEMSPageFrame: %04x\n", 0xC7, 0xC4, gvar->pm.emm.EMSPageFrame);
1572 printf(" %c%cEMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.EMSmem);
1574 if(MML_CheckForXMS())
1576 printf(" %cXMS %u\n", 0xC9, gvar->pm.xmm.XMSPresent);
1577 printf(" %c%cXMS v%x.%x available\n", 0xC7, 0xC4, XMSVer>>8,XMSVer&0x0F);
1578 printf(" %c%cXMSDriver: %Fp\n", 0xC7, 0xC4, XMSDriver);
1579 printf(" %c%cXMSHandle: %04x\n", 0xC7, 0xC4, gvar->pm.xmm.XMSHandle);
1580 printf(" %c%cXMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.XMSmem);
1582 printf(" %cConv. %u\n", 0xC9, gvar->pm.mm.MainPresent); DebugMemory_(gvar, 0);
1583 //printf("mainmem: %lu\n", gvar->mmi.mainmem);
1584 //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);
1585 //printf(" UnusedMemory: %lu\n", MM_UnusedMemory(gvar));
1586 printf("nearheap: %lu ", gvar->mmi.nearheap); printf("farheap: %lu\n", gvar->mmi.farheap);
1589 //==========================================================================
1592 =====================
1596 =====================
1599 void MM_EMSerr(byte *stri, byte err)
1601 //Returns a text string describing the error code in EMS.Error.
1605 strcat(stri, "successful");
1608 strcat(stri, "internal error");
1611 strcat(stri, "hardware malfunction");
1614 strcat(stri, "busy .. retry later");
1617 strcat(stri, "invalid handle");
1620 strcat(stri, "undefined function requested by application");
1623 strcat(stri, "no more handles available");
1626 strcat(stri, "error in save or restore of mapping context");
1629 strcat(stri, "insufficient memory pages in system");
1632 strcat(stri, "insufficient memory pages available");
1635 strcat(stri, "zero pages requested");
1638 strcat(stri, "invalid logical page number encountered");
1641 strcat(stri, "invalid physical page number encountered");
1644 strcat(stri, "page-mapping hardware state save area is full");
1647 strcat(stri, "save of mapping context failed");
1650 strcat(stri, "restore of mapping context failed");
1653 strcat(stri, "undefined subfunction");
1656 strcat(stri, "undefined attribute type");
1659 strcat(stri, "feature not supported");
1662 strcat(stri, "successful, but a portion of the source region has been overwritten");
1665 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1668 strcat(stri, "conventional and expanded memory regions overlap");
1671 strcat(stri, "offset within logical page exceeds size of logical page");
1674 strcat(stri, "region length exceeds 1 MB");
1677 strcat(stri, "source and destination EMS regions have same handle and overlap");
1680 strcat(stri, "memory source or destination type undefined");
1683 strcat(stri, "specified alternate map register or DMA register set not supported");
1686 strcat(stri, "all alternate map register or DMA register sets currently allocated");
1689 strcat(stri, "alternate map register or DMA register sets not supported");
1692 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1695 strcat(stri, "dedicated DMA channels not supported");
1698 strcat(stri, "specified dedicated DMA channel not supported");
1701 strcat(stri, "no such handle name");
1704 strcat(stri, "a handle found had no name, or duplicate handle name");
1707 strcat(stri, "attempted to wrap around 1M conventional address space");
1710 strcat(stri, "source array corrupted");
1713 strcat(stri, "operating system denied access");
1716 strcat(stri, "undefined error");
1720 //==========================================================================
1723 =====================
1727 =====================
1730 void MM_BombOnError(boolean bomb, global_game_variables_t *gvar)
1732 gvar->mm.bombonerror = bomb;
1735 /*void MM_GetNewBlock(global_game_variables_t *gvar)
1737 if(!gvar->mm.mmfree)
1738 MML_ClearBlock(gvar);
1739 gvar->mm.mmnew=gvar->mm.mmfree;
1740 gvar->mm.mmfree=gvar->mm.mmfree->next;
1741 if(!(gvar->mm.mmnew=gvar->mm.mmfree))
1743 printf("MM_GETNEWBLOCK: No free blocks!\n");
1746 gvar->mm.mmfree=gvar->mm.mmfree->next;
1749 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
1752 x->next=gvar->mm.mmfree;
1756 void xms_call(byte v, global_game_variables_t *gvar)
1758 dword XMSDriver = gvar->pm.xmm.XMSDriver;
1761 call [DWORD PTR XMSDriver]
1765 /*void MM_seguin(void)
1775 void MM_segude(void)
1783 pull data from far and put it into ds var