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_pm.h"
51 #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("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;
349 //printf(" gvar->mmi.EMSmem=%lu\n", gvar->mmi.EMSmem);
353 byte MM_MapXEMS(global_game_variables_t *gvar)
355 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
357 //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
358 //PhysicalStart = Physical page first logical page is mapped to
359 //LogicalStart = First logical page to map
360 //NumPages = Number of pages to map (1 to 4)
361 //Handle = EMS handle logical pages are allocated to
363 /*//Create a buffer containing the page information
364 // FOR x = 0 TO NumPages - 1
365 // MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
368 // Regs.ax = 0x5000 //Map the pages in the buffer
369 // Regs.cx = NumPages //to the pageframe
371 // Regs.ds = VARSEG(MapInfo$)
372 // Regs.si = SADD(MapInfo$)
373 // InterruptX 0x67, Regs, Regs
374 // EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100 //Store the status code
380 boolean errorflag=false;
382 EMShandle=gvar->mm.EMShandle;
384 if(gvar->mm.EMSVer<0x40)
387 for (i=0;i<MAPPAGES;i++)
391 mov cx,[i] // logical page
392 mov al,bl // physical page
393 mov dx,[EMShandle] // handle
416 //strcpy(str,"MM_MapXEMS: EMS error 0x");
417 strcpy(str,"MM_MapXEMS: EMS error ");
421 //printf("%s%x\n",str, err);
422 //printf("FACK! %x\n", err);
426 gvar->mmi.EMSmem = (i)*0x4000lu;
430 //==========================================================================
433 ======================
437 = Check for XMM driver
439 =======================
442 boolean MML_CheckForXMS(global_game_variables_t *gvar)
444 boolean errorflag=false;
445 gvar->mm.numUMBs = 0;
449 int 0x2f // query status of installed diver
460 if(errorflag==true) return false;
466 ======================
470 = Try to allocate all upper memory block
472 =======================
475 void MML_SetupXMS(global_game_variables_t *gvar)
483 mov [WORD PTR XMSaddr],bx
484 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
489 mov dx,0xffff // try for largest block possible
490 //mov ax,dx // Set available Kbytes.
491 call [DWORD PTR XMSaddr]
495 cmp bl,0xb0 // error: smaller UMB is available
499 call [DWORD PTR XMSaddr] // DX holds largest available UMB
501 jz done // another error...
518 // printf("base=%u ", base); printf("size=%u\n", size);
519 MML_UseSpace(base,size, gvar);
520 gvar->mmi.XMSmem += size*16;
521 gvar->mm.UMBbase[gvar->mm.numUMBs] = base;
523 if(gvar->mm.numUMBs < MAXUMBS)
529 ======================
533 ======================
536 void MML_ShutdownXMS(global_game_variables_t *gvar)
541 for (i=0;i<gvar->mm.numUMBs;i++)
543 base = gvar->mm.UMBbase[i];
547 call [DWORD PTR XMSaddr]
552 //==========================================================================
555 ======================
559 = Marks a range of paragraphs as usable by the memory manager
560 = This is used to mark space for the near heap, far heap, ems page frame,
561 = and upper memory blocks
563 ======================
566 /*void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
568 //huge mmblocktype huge *scan,huge *last;
574 scan = last = gvar->mm.mmhead;
575 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
578 // search for the block that contains the range of segments
580 while(scan->start+scan->length < segstart)
587 // take the given range out of the block
589 oldend = scan->start + scan->length;
590 extra = oldend - (segstart+seglength);
595 if(segm>1)/// || extra>=0x10000lu)
600 //MML_UseSpace(segstart, seglength, gvar);
602 printf("MML_UseSpace: Segment spans two blocks!\n");
604 printf("segm=%u ", segm);
605 printf("ex=%lu ", extra);
606 printf("old=%u ", oldend);
607 printf("start+seglen=%lu\n", segstart+seglength);
608 printf("segsta=%x ", segstart);
609 printf("len=%lu ", scan->length);
610 printf("seglen=%lu ", seglength);
611 printf("segmlen=%lu\n", segmlen);
613 //++++todo: linked list of segment!
614 if(segstart == scan->start)
616 last->next = scan->next; // unlink block
621 scan->length = segstart-scan->start; // shorten block
626 gvar->mm.mmnew->useptr = NULL;
628 gvar->mm.mmnew->next = scan->next;
629 scan->next = gvar->mm.mmnew;
630 gvar->mm.mmnew->start = segstart+seglength;
631 gvar->mm.mmnew->length = extra;
632 gvar->mm.mmnew->attributes = LOCKBIT;
633 }//else if(segm>0) goto segu;
636 void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
638 mmblocktype far *scan,far *last;
643 scan = last = gvar->mm.mmhead;
644 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
647 // search for the block that contains the range of segments
649 while (scan->start+scan->length < segstart)
656 // find out how many blocks it spans!
658 /*for(;seglength>=0x10000;seglength-=0xFFFF)
660 //printf(" seglen=%lu\n", segmlen);
665 // take the given range out of the block
667 oldend = scan->start + scan->length;
668 extra = oldend - (segstart+((unsigned)seglength));
671 printf("========================================\n");
672 printf("start=%x ", scan->start);
673 printf("old=%u ", oldend);
674 printf("start+seglen=%lu\n", segstart+seglength);
675 printf("segsta=%x ", segstart);
676 printf("len=%lu ", scan->length);
677 printf("seglen=%lu ", seglength);
679 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
680 printf("========================================\n");
684 if (segstart == scan->start)
686 last->next = scan->next; // unlink block
691 scan->length = segstart-scan->start; // shorten block
696 gvar->mm.mmnew->useptr = NULL;
698 gvar->mm.mmnew->next = scan->next;
699 scan->next = gvar->mm.mmnew;
700 gvar->mm.mmnew->start = segstart+seglength;
701 gvar->mm.mmnew->length = extra;
702 gvar->mm.mmnew->attributes = LOCKBIT;
707 //==========================================================================
714 = We are out of blocks, so free a purgable block
719 void MML_ClearBlock(global_game_variables_t *gvar)
721 //huge mmblocktype huge *scan,huge *last;
722 mmblocktype far *scan,far *last;
724 scan = gvar->mm.mmhead->next;
728 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
730 MM_FreePtr(scan->useptr, gvar);
736 printf("MM_ClearBlock: No purgable blocks!\n");
740 //==========================================================================
747 = Grabs all space from turbo with malloc/farmalloc
748 = Allocates bufferseg misc buffer
753 void MM_Startup(global_game_variables_t *gvar)
756 //dword length,seglength;
757 dword length; word seglength;
758 //huge void huge *start;
760 word segstart;//,endfree;
763 if(gvar->mm.mmstarted)
766 gvar->mm.mmstarted = true;
767 gvar->mm.bombonerror = true;
770 // set up the linked list (everything in the free list;
772 gvar->mm.mmhead = NULL;
773 gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);
774 for(i=0;i<MAXBLOCKS-1;i++)
776 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);
778 gvar->mm.mmblocks[i].next = NULL;
781 // locked block of all memory until we punch out free space
784 gvar->mm.mmhead = gvar->mm.mmnew; // this will allways be the first node
785 gvar->mm.mmnew->start = 0;
786 gvar->mm.mmnew->length = 0xffff;
787 gvar->mm.mmnew->attributes = LOCKBIT;
788 gvar->mm.mmnew->next = NULL;
789 //gvar->mm.mmnew->useptr = peeonself;
790 gvar->mm.mmrover = gvar->mm.mmhead;
792 //printf(" %x\n", peeonself);
793 //printf(" %x\n", *peeonself);
795 // get all available near conventional memory segments
799 length=(dword)_memavl();//(dword)GetFreeSize();
800 //huge start = (void huge *)(gvar->mm.nearheap = _nmalloc(length));
801 start = (void far *)(gvar->mm.nearheap = _nmalloc(length));
805 //huge start = (void huge *)(gvar->mm.nearheap = malloc(length));
806 start = (void far *)(gvar->mm.nearheap = malloc(length));
808 length -= 16-(FP_OFF(start)&15);
809 length -= SAVENEARHEAP;
810 seglength = length / 16; // now in paragraphs
811 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
812 MML_UseSpace(segstart,seglength, gvar);
813 gvar->mmi.nearheap = length;
814 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
817 // get all available far conventional memory segments
819 //printf("_FARCORELEFT %lu\n", _FCORELEFT);
824 printf("farcoreleft() %lu\n", farcoreleft());
825 printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
827 length=_FCORELEFT;//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
828 start = gvar->mm.farheap = _fmalloc(length);
829 //start = gvar->mm.farheap = halloc(length, 1);
830 length -= 16-(FP_OFF(start)&15);
831 length -= SAVEFARHEAP;
832 seglength = length / 16; // now in paragraphs
833 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
834 MML_UseSpace(segstart,seglength, gvar);
835 gvar->mmi.farheap = length;
836 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
838 gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
843 // detect EMS and allocate up to 64K at page frame
845 gvar->mmi.EMSmem = 0;
846 //goto emsskip; //0000
863 ,ParmStringsexmm) == 0)
864 goto emsskip; // param NOEMS
866 if(MML_CheckForEMS())
868 MML_SetupEMS(gvar); // allocate space
869 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
870 MML_UseSpace(gvar->mm.EMSpageframe,(MAPPAGES)*0x4000lu, gvar);
871 //if(gvar->pm.emm.EMSVer<0x40)
872 MM_MapEMS(gvar); // map in used pages
874 //MM_MapXEMS(gvar); // map in used pages
878 // detect XMS and get upper memory blocks
881 gvar->mmi.XMSmem = 0;
899 ,ParmStringsexmm) == 0)
900 goto xmsskip; // param NOXMS
902 if(MML_CheckForXMS(gvar))
904 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");
940 if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf(" EMS freed\n"); }
941 if(MML_CheckForXMS(gvar)){ MML_ShutdownXMS(gvar); }//printf(" XMS freed\n"); }
944 //==========================================================================
951 = Allocates an unlocked, unpurgable block
956 void MM_GetPtr (memptr *baseptr, dword size, global_game_variables_t *gvar)
958 //huge mmblocktype huge *scan,huge *lastscan,huge *endscan,huge *purge,huge *next;
959 mmblocktype far *scan,far *lastscan,far *endscan,far *purge,far *next;
961 unsigned needed,startseg;
963 needed = (size+15)/16; // convert size from bytes to paragraphs
965 GETNEWBLOCK; // fill in start and next after a spot is found
966 gvar->mm.mmnew->length = needed;
967 gvar->mm.mmnew->useptr = baseptr;
968 //if(gvar->mm.mmnew->useptr==NULL){
970 printf("baseptr=%04x ", baseptr); printf("useptr=%04x\n", gvar->mm.mmnew->useptr);
971 printf("*baseptr=%04x ", *baseptr); printf("*useptr=%04x\n", *(gvar->mm.mmnew->useptr));
972 printf("*baseptr=%Fp ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
975 gvar->mm.mmnew->attributes = BASEATTRIBUTES;
978 for (search = 0; search<3; search++)
981 // first search: try to allocate right after the rover, then on up
982 // second search: search from the head pointer up to the rover
983 // third search: compress memory, then scan from start
984 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)
990 lastscan = gvar->mm.mmrover;
991 scan = gvar->mm.mmrover->next;
995 lastscan = gvar->mm.mmhead;
996 scan = gvar->mm.mmhead->next;
997 endscan = gvar->mm.mmrover;
1001 lastscan = gvar->mm.mmhead;
1002 scan = gvar->mm.mmhead->next;
1007 startseg = lastscan->start + lastscan->length;
1009 while (scan != endscan)
1011 if (scan->start - startseg >= needed)
1014 // got enough space between the end of lastscan and
1015 // the start of scan, so throw out anything in the middle
1016 // and allocate the new block
1018 purge = lastscan->next;
1019 lastscan->next = gvar->mm.mmnew;
1020 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;
1021 gvar->mm.mmnew->next = scan;
1022 while ( purge != scan)
1023 { // free the purgable block
1026 purge = next; // purge another if not at scan
1028 gvar->mm.mmrover = gvar->mm.mmnew;
1029 return; // good allocation!
1033 // if this block is purge level zero or locked, skip past it
1035 if ( (scan->attributes & LOCKBIT)
1036 || !(scan->attributes & PURGEBITS) )
1039 startseg = lastscan->start + lastscan->length;
1043 scan=scan->next; // look at next line
1047 if (gvar->mm.bombonerror)
1052 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));
1053 printf("for stability reasons the program will shut down! wwww\n");
1058 gvar->mm.mmerror = true;
1061 //==========================================================================
1064 ====================
1068 = Allocates an unlocked, unpurgable block
1070 ====================
1073 void MM_FreePtr(memptr *baseptr, global_game_variables_t *gvar)
1075 //huge mmblocktype huge *scan,huge *last;
1076 mmblocktype far *scan,far *last;
1078 last = gvar->mm.mmhead;
1081 if(baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
1082 gvar->mm.mmrover = gvar->mm.mmhead;
1084 while(scan->useptr != baseptr && scan)
1092 printf("MM_FreePtr: Block not found!\n");
1096 last->next = scan->next;
1100 //==========================================================================
1103 =====================
1107 = Sets the purge level for a block (locked blocks cannot be made purgable)
1109 =====================
1112 void MM_SetPurge(memptr *baseptr, int purge, global_game_variables_t *gvar)
1114 //huge mmblocktype huge *start;
1115 mmblocktype far *start;
1117 start = gvar->mm.mmrover;
1121 if(gvar->mm.mmrover->useptr == baseptr)
1124 gvar->mm.mmrover = gvar->mm.mmrover->next;
1126 if(!gvar->mm.mmrover)
1127 gvar->mm.mmrover = gvar->mm.mmhead;
1128 else if(gvar->mm.mmrover == start)
1130 Quit("MM_SetPurge: Block not found!");
1136 gvar->mm.mmrover->attributes &= ~PURGEBITS;
1137 gvar->mm.mmrover->attributes |= purge;
1140 //==========================================================================
1143 =====================
1147 = Locks / unlocks the block
1149 =====================
1152 void MM_SetLock(memptr *baseptr, boolean locked, global_game_variables_t *gvar)
1154 //huge mmblocktype huge *start;
1155 mmblocktype far *start;
1157 start = gvar->mm.mmrover;
1161 if(gvar->mm.mmrover->useptr == baseptr)
1164 gvar->mm.mmrover = gvar->mm.mmrover->next;
1166 if(!gvar->mm.mmrover)
1167 gvar->mm.mmrover = gvar->mm.mmhead;
1168 else if(gvar->mm.mmrover == start)
1170 Quit("MM_SetLock: Block not found!");
1176 gvar->mm.mmrover->attributes &= ~LOCKBIT;
1177 gvar->mm.mmrover->attributes |= locked*LOCKBIT;
1180 //==========================================================================
1183 =====================
1187 = Throws out all purgable stuff and compresses movable blocks
1189 =====================
1192 void MM_SortMem(global_game_variables_t *gvar)
1194 //huge mmblocktype huge *scan,huge *last,huge *next;
1195 mmblocktype far *scan,far *last,far *next;
1196 unsigned start,length,source,dest,oldborder;
1200 // lock down a currently playing sound
1202 /*++++ playing = SD_SoundPlaying ();
1208 playing += STARTPCSOUNDS;
1211 playing += STARTADLIBSOUNDS;
1214 MM_SetLock(&(memptr)audiosegs[playing],true);
1219 // oldborder = bordercolor;
1220 // VW_ColorBorder (15);
1225 scan = gvar->mm.mmhead;
1227 last = NULL; // shut up compiler warning
1231 if(scan->attributes & LOCKBIT)
1234 // block is locked, so try to pile later blocks right after it
1236 start = scan->start + scan->length;
1240 if(scan->attributes & PURGEBITS)
1243 // throw out the purgable block
1247 //MM_FreeBlock(scan, gvar);
1255 // push the non purgable block on top of the last moved block
1257 if(scan->start != start)
1259 length = scan->length;
1260 source = scan->start;
1262 while(length > 0xf00)
1264 movedata(source,0,dest,0,0xf00*16);
1269 movedata(source,0,dest,0,length*16);
1271 scan->start = start;
1272 *(unsigned *)scan->useptr = start;
1274 start = scan->start + scan->length;
1279 scan = scan->next; // go to next block
1282 gvar->mm.mmrover = gvar->mm.mmhead;
1287 // VW_ColorBorder (oldborder);
1290 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1293 //==========================================================================
1296 =====================
1300 =====================
1303 void MM_ShowMemory(global_game_variables_t *gvar)
1305 //huge mmblocktype huge *scan;
1306 mmblocktype far *scan;
1312 byte scratch[160],scratch0[4096],scratch1[160],str[16];
1314 //**** VW_SetDefaultColors();
1315 //**** VW_SetLineWidth(40);
1316 //++++mh temp = bufferofs;
1317 //++++mh bufferofs = 0;
1318 //**** VW_SetScreen (0,0);
1319 scan = gvar->mm.mmhead;
1322 CA_OpenDebug (gvar);
1326 strcpy(scratch, AARESET);
1327 if(scan->attributes & PURGEBITS)
1328 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
1330 strcpy(scratch0, AABLUE); // medium blue = non purgable
1331 if(scan->attributes & LOCKBIT)
1332 strcpy(scratch0, AARED); // red = locked
1333 if(scan->start<=end)
1335 printf("\nend==%d\n\n", end);
1336 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1337 strcat(scratch, "End's Size: ");
1339 strcat (scratch,str);
1340 strcat(scratch, "\nscan->start's Size: ");
1341 ultoa (scan->start,str,10);
1342 strcat (scratch,str);
1343 write(gvar->handle.debughandle,scratch,strlen(scratch));
1344 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1347 end = scan->start+(scan->length)-1;
1348 //++++ chy = scan->start/320;
1349 //++++ chx = scan->start%320;
1350 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1351 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1353 //++++ modexClearRegion(page, chx, chy, 4, 4, color);
1355 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1356 for(w=(scan->start)/80;w<=end/80;w++)
1358 //printf("+ %u %lu\n", w, scan->length);
1359 strcat(scratch0, "+");
1361 //++==++==optional strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1362 //++++ VW_Plot(scan->start,0,15);
1363 //++++ modexClearRegion(page, chx, chy, 4, 4, 15);
1364 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1366 //wwww=(dword)(scan->next->start)-(dword)scan->start;
1367 //wwww=(dword)scan->start+(dword)(scan->next->start);
1368 if (scan->next && scan->next->start >= end+1)
1370 strcat(scratch0, AARESET);
1371 //++==++==optional strcat(scratch0, "\n");
1372 strcat(scratch0,AAGREEN);
1373 for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
1374 //for(w=(wwww)/80;w<=((end+1)/80);w++)
1375 //for(w=(end+1)/80;w<=((wwww)/80);w++)
1377 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
1378 strcat(scratch0,"0");
1380 //printf("==================\n");
1381 //printf("w=%u wwww=%lu start=%04x next=%04x end=%lu\n", w/80, wwww/80, scan->start, (scan->next->start), end+1);
1382 //printf("==================\n");
1383 strcat(scratch0, "\n");
1385 }/*else {//if(scan->next->start <= scan->start){
1386 scan->next->start=scan->start+0x1000;
1387 wwww=(dword)(scan->next->start)-(dword)scan->start;
1388 strcat(scratch0, AARESET);
1389 strcat(scratch0, "\n");
1390 strcat(scratch0,AAGREEN);
1391 for(w=(end+1);w<=(0x1000/80);w++)
1393 //printf("0 %x %x %u\n", scan->start, w);
1394 strcat(scratch0,"0");
1396 printf("================\n");
1397 printf("w=%x start=%x next=%x end=%u %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1398 printf("================\n");
1401 strcat(scratch0, AARESET);
1402 //strcat(scratch0,"\n");
1403 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1405 // chx+=scan->next->start;
1406 // modexClearRegion(page, chx, chy, 4, 4, 2);
1408 //modexhlin(page, end+1,scan->next->start, chy, 0);
1409 /* y = scan->start/320;
1410 x = scan->start%320;
1411 VW_Hlin(x,x+end,y,color);
1413 //++++ VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1414 strcat(scratch,"Seg:");
1415 ultoa (scan->start,str,16);
1416 strcat (scratch,str);
1417 strcat (scratch,"\tSize:");
1418 ultoa ((unsigned)scan->length,str,10);
1419 strcat (scratch,str);
1420 strcat (scratch,"\tOwner:0x");
1421 owner = (unsigned)scan->useptr;
1422 ultoa (owner,str,16);
1423 strcat (scratch,str);
1424 strcat (scratch,"\n");
1425 write(gvar->handle.debughandle,scratch,strlen(scratch));
1426 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1427 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1429 //fprintf(stdout, "%s", scratch);
1433 /*strcpy(scratch1, AARESET);
1434 strcat(scratch1, "========================================\n");
1435 strcat(scratch1, "near= ");
1436 ultoa (*(gvar->mm.nearheap),str,10);
1437 strcat (scratch1,str);
1438 strcat(scratch1, " far= ");
1439 ultoa (*(gvar->mm.farheap),str,10);
1440 strcat (scratch1,str);
1441 strcat(scratch1, "\n");
1442 //strcat(scratch1, "&near= %Fp ", &(gvar->mm.nearheap));
1443 //strcat(scratch1, "&far= %Fp", &(gvar->mm.farheap));
1444 //strcat(scratch1, "\n");
1445 strcat(scratch1, "========================================\n");
1446 write(gvar->handle.debughandle,scratch1,strlen(scratch1));*/
1449 CA_CloseDebug (gvar);
1452 //**** VW_SetLineWidth(64);
1453 //++++mh bufferofs = temp;
1456 //==========================================================================
1459 =====================
1463 =====================
1466 void MM_DumpData(global_game_variables_t *gvar)
1468 //huge mmblocktype huge *scan,huge *best;
1469 mmblocktype far *scan,far *best;
1470 long lowest,oldlowest;
1475 free(gvar->mm.nearheap);
1477 dumpfile = fopen ("mmdump.16b","w");
1480 dumpfile = fopen ("mmdump.16w","w");
1483 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1493 scan = gvar->mm.mmhead;
1496 owner = (unsigned)scan->useptr;
1498 if (owner && owner<lowest && owner > oldlowest)
1507 if (lowest != 0xffff)
1509 if (best->attributes & PURGEBITS)
1513 if (best->attributes & LOCKBIT)
1517 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1518 ,(unsigned)lowest,lock,purge,best->length);
1521 } while (lowest != 0xffff);
1524 printf("MMDUMP.16 created.\n");
1527 //==========================================================================
1531 ======================
1535 = Returns the total free space without purging
1537 ======================
1540 dword MM_UnusedMemory(global_game_variables_t *gvar)
1543 //huge mmblocktype huge *scan;
1544 mmblocktype far *scan;
1547 scan = gvar->mm.mmhead;
1551 free += scan->next->start - (scan->start + scan->length);
1559 //==========================================================================
1563 ======================
1567 = Returns the total free space with purging
1569 ======================
1572 dword MM_TotalFree(global_game_variables_t *gvar)
1575 //huge mmblocktype huge *scan;
1576 mmblocktype far *scan;
1579 scan = gvar->mm.mmhead;
1583 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1584 free += scan->length;
1585 free += scan->next->start - (scan->start + scan->length);
1593 //==========================================================================
1596 =====================
1600 =====================
1603 void MM_Report_(global_game_variables_t *gvar)
1605 printf("========================================\n");
1606 printf(" MM_Report\n");
1607 printf("========================================\n");
1608 if(MML_CheckForEMS())
1610 printf(" LIMEMS\n");
1611 printf(" EMM v%x.%x available\n", gvar->mm.EMSVer>>4,gvar->mm.EMSVer&0x0F);
1612 printf(" totalEMSpages: %u ", gvar->mm.totalEMSpages); printf("freeEMSpages: %u\n", gvar->mm.freeEMSpages);
1613 printf(" EMSpageframe: %x\n", gvar->mm.EMSpageframe);
1615 if(MML_CheckForXMS(gvar))
1618 printf(" XMSaddr: %X\n", *XMSaddr);
1620 printf("near: %lu ", gvar->mmi.nearheap); printf("far: %lu\n", gvar->mmi.farheap); if(MML_CheckForEMS())
1621 printf("EMSmem: %lu ", gvar->mmi.EMSmem); if(MML_CheckForXMS(gvar)) printf("XMSmem: %lu", gvar->mmi.XMSmem); printf("\n");
1622 //printf("mainmem: %lu\n", gvar->mmi.mainmem);
1623 printf("Total convmem: %lu ", gvar->mmi.mainmem); printf("TotalFree: %lu ", MM_TotalFree(gvar)); printf("TotalUsed: %lu\n", gvar->mmi.mainmem+gvar->mmi.EMSmem+gvar->mmi.XMSmem+gvar->mmi.XMSmem);
1624 printf(" UnusedMemory: %lu\n", MM_UnusedMemory(gvar));
1627 //==========================================================================
1630 =====================
1634 =====================
1637 void MM_EMSerr(byte *stri, byte err)
1639 //Returns a text string describing the error code in EMS.Error.
1643 strcat(stri, "successful");
1646 strcat(stri, "internal error");
1649 strcat(stri, "hardware malfunction");
1652 strcat(stri, "busy .. retry later");
1655 strcat(stri, "invalid handle");
1658 strcat(stri, "undefined function requested by application");
1661 strcat(stri, "no more handles available");
1664 strcat(stri, "error in save or restore of mapping context");
1667 strcat(stri, "insufficient memory pages in system");
1670 strcat(stri, "insufficient memory pages available");
1673 strcat(stri, "zero pages requested");
1676 strcat(stri, "invalid logical page number encountered");
1679 strcat(stri, "invalid physical page number encountered");
1682 strcat(stri, "page-mapping hardware state save area is full");
1685 strcat(stri, "save of mapping context failed");
1688 strcat(stri, "restore of mapping context failed");
1691 strcat(stri, "undefined subfunction");
1694 strcat(stri, "undefined attribute type");
1697 strcat(stri, "feature not supported");
1700 strcat(stri, "successful, but a portion of the source region has been overwritten");
1703 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1706 strcat(stri, "conventional and expanded memory regions overlap");
1709 strcat(stri, "offset within logical page exceeds size of logical page");
1712 strcat(stri, "region length exceeds 1 MB");
1715 strcat(stri, "source and destination EMS regions have same handle and overlap");
1718 strcat(stri, "memory source or destination type undefined");
1721 strcat(stri, "specified alternate map register or DMA register set not supported");
1724 strcat(stri, "all alternate map register or DMA register sets currently allocated");
1727 strcat(stri, "alternate map register or DMA register sets not supported");
1730 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1733 strcat(stri, "dedicated DMA channels not supported");
1736 strcat(stri, "specified dedicated DMA channel not supported");
1739 strcat(stri, "no such handle name");
1742 strcat(stri, "a handle found had no name, or duplicate handle name");
1745 strcat(stri, "attempted to wrap around 1M conventional address space");
1748 strcat(stri, "source array corrupted");
1751 strcat(stri, "operating system denied access");
1754 strcat(stri, "undefined error");
1758 //==========================================================================
1761 =====================
1765 =====================
1768 void MM_BombOnError(boolean bomb, global_game_variables_t *gvar)
1770 gvar->mm.bombonerror = bomb;
1773 /*void MM_GetNewBlock(global_game_variables_t *gvar)
1775 if(!gvar->mm.mmfree)
1776 MML_ClearBlock(gvar);
1777 gvar->mm.mmnew=gvar->mm.mmfree;
1778 gvar->mm.mmfree=gvar->mm.mmfree->next;
1779 if(!(gvar->mm.mmnew=gvar->mm.mmfree))
1781 printf("MM_GETNEWBLOCK: No free blocks!\n");
1784 gvar->mm.mmfree=gvar->mm.mmfree->next;
1787 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
1790 x->next=gvar->mm.mmfree;
1794 /*void MM_seguin(void)
1804 void MM_segude(void)
1812 pull data from far and put it into ds var