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 ======================
565 /*void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
567 mmblocktype far *scan,far *last;
573 scan = last = gvar->mm.mmhead;
574 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
577 // search for the block that contains the range of segments
579 while(scan->start+scan->length < segstart)
586 // take the given range out of the block
588 oldend = scan->start + scan->length;
589 extra = oldend - (segstart+seglength);
594 if(segm>1)/// || extra>=0x10000lu)
599 //MML_UseSpace(segstart, seglength, gvar);
601 printf("MML_UseSpace: Segment spans two blocks!\n");
603 printf("segm=%u ", segm);
604 printf("ex=%lu ", extra);
605 printf("old=%u ", oldend);
606 printf("start+seglen=%lu\n", segstart+seglength);
607 printf("segsta=%x ", segstart);
608 printf("len=%lu ", scan->length);
609 printf("seglen=%lu ", seglength);
610 printf("segmlen=%lu\n", segmlen);
612 //++++todo: linked list of segment!
613 if(segstart == scan->start)
615 last->next = scan->next; // unlink block
620 scan->length = segstart-scan->start; // shorten block
625 gvar->mm.mmnew->useptr = NULL;
627 gvar->mm.mmnew->next = scan->next;
628 scan->next = gvar->mm.mmnew;
629 gvar->mm.mmnew->start = segstart+seglength;
630 gvar->mm.mmnew->length = extra;
631 gvar->mm.mmnew->attributes = LOCKBIT;
632 }//else if(segm>0) goto segu;
635 void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
637 mmblocktype far *scan,far *last;
642 scan = last = gvar->mm.mmhead;
643 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
646 // search for the block that contains the range of segments
648 while (scan->start+scan->length < segstart)
655 // find out how many blocks it spans!
657 /*for(;seglength>=0x10000;seglength-=0xFFFF)
659 //printf(" seglen=%lu\n", segmlen);
664 // take the given range out of the block
666 oldend = scan->start + scan->length;
667 extra = oldend - (segstart+((unsigned)seglength));
670 printf("========================================\n");
671 printf("start=%x ", scan->start);
672 printf("old=%u ", oldend);
673 printf("start+seglen=%lu\n", segstart+seglength);
674 printf("segsta=%x ", segstart);
675 printf("len=%lu ", scan->length);
676 printf("seglen=%lu ", seglength);
678 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
679 printf("========================================\n");
683 if (segstart == scan->start)
685 last->next = scan->next; // unlink block
690 scan->length = segstart-scan->start; // shorten block
695 gvar->mm.mmnew->useptr = NULL;
697 gvar->mm.mmnew->next = scan->next;
698 scan->next = gvar->mm.mmnew;
699 gvar->mm.mmnew->start = segstart+seglength;
700 gvar->mm.mmnew->length = extra;
701 gvar->mm.mmnew->attributes = LOCKBIT;
706 //==========================================================================
713 = We are out of blocks, so free a purgable block
718 void MML_ClearBlock(global_game_variables_t *gvar)
720 mmblocktype far *scan;//,far *last;
722 scan = gvar->mm.mmhead->next;
726 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
728 MM_FreePtr(scan->useptr, gvar);
734 printf("MM_ClearBlock: No purgable blocks!\n");
738 //==========================================================================
745 = Grabs all space from turbo with malloc/farmalloc
746 = Allocates bufferseg misc buffer
751 void MM_Startup(global_game_variables_t *gvar)
754 //dword length,seglength;
755 dword length; word seglength;
757 word segstart;//,endfree;
759 if(gvar->mm.mmstarted)
762 gvar->mm.mmstarted = true;
763 gvar->mm.bombonerror = true;
766 // set up the linked list (everything in the free list;
768 gvar->mm.mmhead = NULL;
769 gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);
770 for(i=0;i<MAXBLOCKS-1;i++)
771 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);
772 gvar->mm.mmblocks[i].next = NULL;
775 // locked block of all memory until we punch out free space
778 gvar->mm.mmhead = gvar->mm.mmnew; // this will allways be the first node
779 gvar->mm.mmnew->start = 0;
780 gvar->mm.mmnew->length = 0xffff;
781 gvar->mm.mmnew->attributes = LOCKBIT;
782 gvar->mm.mmnew->next = NULL;
783 gvar->mm.mmrover = gvar->mm.mmhead;
786 // get all available near conventional memory segments
790 length=(dword)_memavl();//(dword)GetFreeSize();
791 start = (void __near *)(gvar->mm.nearheap = _nmalloc(length));
795 start = (void near *)(gvar->mm.nearheap = malloc(length));
797 length -= 16-(FP_OFF(start)&15);
798 length -= SAVENEARHEAP;
799 seglength = length / 16; // now in paragraphs
800 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
801 MML_UseSpace(segstart,seglength, gvar);
802 gvar->mmi.nearheap = length;
803 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
806 // get all available far conventional memory segments
808 //printf("_FARCORELEFT %lu\n", _FCORELEFT);
811 length=_FCORELEFT;//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
814 printf("farcoreleft() %lu\n", farcoreleft());
815 printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
816 length=farcoreleft();//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
818 start = gvar->mm.farheap = _fmalloc(length);
819 //start = gvar->mm.farheap = halloc(length, 1);
820 length -= 16-(FP_OFF(start)&15);
821 length -= SAVEFARHEAP;
822 seglength = length / 16; // now in paragraphs
823 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
824 MML_UseSpace(segstart,seglength, gvar);
825 gvar->mmi.farheap = length;
826 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
828 gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
833 // detect EMS and allocate up to 64K at page frame
835 gvar->mmi.EMSmem = 0;
836 //goto emsskip; //0000
837 for(i = 1;i < _argc;i++)
839 if(US_CheckParm(_argv[i],ParmStringsexmm) == 0)
840 goto emsskip; // param NOEMS
842 if(MML_CheckForEMS())
844 MML_SetupEMS(gvar); // allocate space
845 //16_PM: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
846 MML_UseSpace(gvar->mm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);
847 //if(gvar->pm.emm.EMSVer<0x40)
848 MM_MapEMS(gvar); // map in used pages
850 //MM_MapXEMS(gvar); // map in used pages
854 // detect XMS and get upper memory blocks
857 gvar->mmi.XMSmem = 0;
859 for(i = 1;i < _argc;i++)
861 if(US_CheckParm( _argv[i],ParmStringsexmm) == 0)
862 goto xmsskip; // param NOXMS
864 if(MML_CheckForXMS())
866 MML_SetupXMS(gvar); // allocate as many UMBs as possible
873 // allocate the misc buffer
875 gvar->mm.mmrover = gvar->mm.mmhead; // start looking for space after low block
877 MM_GetPtr(&(gvar->mm.bufferseg),BUFFERSIZE, gvar);
880 //==========================================================================
887 = Frees all conventional, EMS, and XMS allocated
892 void MM_Shutdown(global_game_variables_t *gvar)
894 if(!(gvar->mm.mmstarted))
897 _ffree(gvar->mm.farheap);// printf(" far freed\n");
899 _nfree(gvar->mm.nearheap);// printf(" near freed\n");
902 free(gvar->mm.nearheap);// printf(" near freed\n");
908 if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf(" EMS freed\n"); }
909 if(MML_CheckForXMS()){ MML_ShutdownXMS(gvar); }//printf(" XMS freed\n"); }
916 //==========================================================================
923 = Allocates an unlocked, unpurgable block
928 void MM_GetPtr (memptr *baseptr, dword size, global_game_variables_t *gvar)
930 mmblocktype far *scan,far *lastscan,far *endscan,far *purge,far *next;
932 unsigned needed,startseg;
934 needed = (size+15)/16; // convert size from bytes to paragraphs
936 GETNEWBLOCK; // fill in start and next after a spot is found
937 gvar->mm.mmnew->length = needed;
938 gvar->mm.mmnew->useptr = baseptr;
939 //if(gvar->mm.mmnew->useptr==NULL){
941 printf("MM_GetPtr\n");
943 printf(" baseptr=%Fp ", baseptr); printf("useptr=%Fp\n", gvar->mm.mmnew->useptr);
944 printf(" *baseptr=%Fp ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
945 printf(" &baseptr=%Fp ", &baseptr); printf("&useptr=%Fp\n", &(gvar->mm.mmnew->useptr));
947 //Quit(gvar, "gvar->mm.mmnew->useptr==NULL"); }
948 gvar->mm.mmnew->attributes = BASEATTRIBUTES;
951 for (search = 0; search<3; search++)
954 // first search: try to allocate right after the rover, then on up
955 // second search: search from the head pointer up to the rover
956 // third search: compress memory, then scan from start
957 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)
963 lastscan = gvar->mm.mmrover;
964 scan = gvar->mm.mmrover->next;
968 lastscan = gvar->mm.mmhead;
969 scan = gvar->mm.mmhead->next;
970 endscan = gvar->mm.mmrover;
974 lastscan = gvar->mm.mmhead;
975 scan = gvar->mm.mmhead->next;
980 startseg = lastscan->start + lastscan->length;
982 while (scan != endscan)
984 if (scan->start - startseg >= needed)
987 // got enough space between the end of lastscan and
988 // the start of scan, so throw out anything in the middle
989 // and allocate the new block
991 purge = lastscan->next;
992 lastscan->next = gvar->mm.mmnew;
993 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;
994 gvar->mm.mmnew->next = scan;
995 while ( purge != scan)
996 { // free the purgable block
999 purge = next; // purge another if not at scan
1001 gvar->mm.mmrover = gvar->mm.mmnew;
1002 return; // good allocation!
1006 // if this block is purge level zero or locked, skip past it
1008 if ( (scan->attributes & LOCKBIT)
1009 || !(scan->attributes & PURGEBITS) )
1012 startseg = lastscan->start + lastscan->length;
1016 scan=scan->next; // look at next line
1020 if (gvar->mm.bombonerror)
1025 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));
1026 Quit(gvar, "for stability reasons the program will shut down! wwww\n");
1029 gvar->mm.mmerror = true;
1032 //==========================================================================
1035 ====================
1039 = Allocates an unlocked, unpurgable block
1041 ====================
1044 void MM_FreePtr(memptr *baseptr, global_game_variables_t *gvar)
1046 mmblocktype far *scan,far *last;
1048 last = gvar->mm.mmhead;
1051 if(baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
1052 gvar->mm.mmrover = gvar->mm.mmhead;
1054 while(scan->useptr != baseptr && scan)
1062 printf("MM_FreePtr: Block not found!\n");
1066 last->next = scan->next;
1070 //==========================================================================
1073 =====================
1077 = Sets the purge level for a block (locked blocks cannot be made purgable)
1079 =====================
1083 void MM_SetPurge(memptr *baseptr, int purge, global_game_variables_t *gvar)
1085 mmblocktype far *start;
1087 start = gvar->mm.mmrover;
1091 if(gvar->mm.mmrover->useptr == baseptr)
1094 gvar->mm.mmrover = gvar->mm.mmrover->next;
1096 if(!gvar->mm.mmrover)
1097 gvar->mm.mmrover = gvar->mm.mmhead;
1098 else if(gvar->mm.mmrover == start)
1100 Quit (gvar, "MM_SetPurge: Block not found!");
1106 gvar->mm.mmrover->attributes &= ~PURGEBITS;
1107 gvar->mm.mmrover->attributes |= purge;
1110 //==========================================================================
1113 =====================
1117 = Locks / unlocks the block
1119 =====================
1122 void MM_SetLock(memptr *baseptr, boolean locked, global_game_variables_t *gvar)
1124 mmblocktype far *start;
1126 start = gvar->mm.mmrover;
1130 if(gvar->mm.mmrover->useptr == baseptr)
1133 gvar->mm.mmrover = gvar->mm.mmrover->next;
1135 if(!gvar->mm.mmrover)
1136 gvar->mm.mmrover = gvar->mm.mmhead;
1137 else if(gvar->mm.mmrover == start)
1139 Quit (gvar, "MM_SetLock: Block not found!");
1145 gvar->mm.mmrover->attributes &= ~LOCKBIT;
1146 gvar->mm.mmrover->attributes |= locked*LOCKBIT;
1149 //==========================================================================
1152 =====================
1156 = Throws out all purgable stuff and compresses movable blocks
1158 =====================
1161 void MM_SortMem(global_game_variables_t *gvar)
1163 mmblocktype far *scan,far *last,far *next;
1164 unsigned start,length,source,dest;//++++,oldborder;
1168 // lock down a currently playing sound
1170 /*++++ playing = SD_SoundPlaying ();
1176 playing += STARTPCSOUNDS;
1179 playing += STARTADLIBSOUNDS;
1182 MM_SetLock(&(memptr)audiosegs[playing],true);
1187 // oldborder = bordercolor;
1188 // VW_ColorBorder (15);
1193 scan = gvar->mm.mmhead;
1195 last = NULL; // shut up compiler warning
1199 if(scan->attributes & LOCKBIT)
1202 // block is locked, so try to pile later blocks right after it
1204 start = scan->start + scan->length;
1208 if(scan->attributes & PURGEBITS)
1211 // throw out the purgable block
1215 //MM_FreeBlock(scan, gvar);
1223 // push the non purgable block on top of the last moved block
1225 if(scan->start != start)
1227 length = scan->length;
1228 source = scan->start;
1230 while(length > 0xf00)
1232 movedata(source,0,dest,0,0xf00*16);
1237 movedata(source,0,dest,0,length*16);
1239 scan->start = start;
1240 *(unsigned *)scan->useptr = start;
1242 start = scan->start + scan->length;
1247 scan = scan->next; // go to next block
1250 gvar->mm.mmrover = gvar->mm.mmhead;
1255 // VW_ColorBorder (oldborder);
1258 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1261 //==========================================================================
1264 =====================
1268 =====================
1271 void MM_ShowMemory(global_game_variables_t *gvar)
1273 mmblocktype far *scan;
1279 byte scratch[160],scratch0[4096],str[16];//[[[[scratch1[160],
1281 //[[[[ VW_SetDefaultColors();
1282 //[[[[ VW_SetLineWidth(40);
1283 //++++mh temp = bufferofs;
1284 //++++mh bufferofs = 0;
1285 //[[[[ VW_SetScreen (0,0);
1286 scan = gvar->mm.mmhead;
1289 CA_OpenDebug (gvar);
1293 strcpy(scratch, AARESET);
1294 if(scan->attributes & PURGEBITS)
1295 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
1297 strcpy(scratch0, AABLUE); // medium blue = non purgable
1298 if(scan->attributes & LOCKBIT)
1299 strcpy(scratch0, AARED); // red = locked
1300 if(scan->start<=end)
1302 printf("\nend==%d\n\n", end);
1303 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1304 strcat(scratch, "End's Size: ");
1306 strcat (scratch,str);
1307 strcat(scratch, "\nscan->start's Size: ");
1308 ultoa (scan->start,str,10);
1309 strcat (scratch,str);
1310 write(gvar->handle.debughandle,scratch,strlen(scratch));
1311 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1314 end = scan->start+(scan->length)-1;
1315 //++++ chy = scan->start/320;
1316 //++++ chx = scan->start%320;
1317 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1318 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1320 //++++ modexClearRegion(page, chx, chy, 4, 4, color);
1322 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1323 for(w=(scan->start)/80;w<=end/80;w++)
1325 //printf("+ %u %lu\n", w, scan->length);
1326 strcat(scratch0, "+");
1328 //++==++==optional strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1329 //++++ VW_Plot(scan->start,0,15);
1330 //++++ modexClearRegion(page, chx, chy, 4, 4, 15);
1331 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1333 //wwww=(dword)(scan->next->start)-(dword)scan->start;
1334 //wwww=(dword)scan->start+(dword)(scan->next->start);
1335 if (scan->next && scan->next->start >= end+1)
1337 strcat(scratch0, AARESET);
1338 //++==++==optional strcat(scratch0, "\n");
1339 strcat(scratch0,AAGREEN);
1340 for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
1341 //for(w=(wwww)/80;w<=((end+1)/80);w++)
1342 //for(w=(end+1)/80;w<=((wwww)/80);w++)
1344 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
1345 strcat(scratch0,"0");
1347 //printf("==================\n");
1348 //printf("w=%u wwww=%lu start=%04x next=%04x end=%lu\n", w/80, wwww/80, scan->start, (scan->next->start), end+1);
1349 //printf("==================\n");
1350 strcat(scratch0, "\n");
1352 }/*else {//if(scan->next->start <= scan->start){
1353 scan->next->start=scan->start+0x1000;
1354 wwww=(dword)(scan->next->start)-(dword)scan->start;
1355 strcat(scratch0, AARESET);
1356 strcat(scratch0, "\n");
1357 strcat(scratch0,AAGREEN);
1358 for(w=(end+1);w<=(0x1000/80);w++)
1360 //printf("0 %x %x %u\n", scan->start, w);
1361 strcat(scratch0,"0");
1363 printf("================\n");
1364 printf("w=%x start=%x next=%x end=%u %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1365 printf("================\n");
1368 strcat(scratch0, AARESET);
1369 //strcat(scratch0,"\n");
1370 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1372 // chx+=scan->next->start;
1373 // modexClearRegion(page, chx, chy, 4, 4, 2);
1375 //modexhlin(page, end+1,scan->next->start, chy, 0);
1376 /* y = scan->start/320;
1377 x = scan->start%320;
1378 VW_Hlin(x,x+end,y,color);
1380 //++++ VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1381 strcat(scratch,"Seg:");
1382 ultoa (scan->start,str,16);
1383 strcat (scratch,str);
1384 strcat (scratch,"\tSize:");
1385 ultoa ((unsigned)scan->length,str,10);
1386 strcat (scratch,str);
1387 strcat (scratch,"\tOwner:0x");
1388 owner = (unsigned)scan->useptr;
1389 ultoa (owner,str,16);
1390 strcat (scratch,str);
1391 strcat (scratch,"\n");
1392 write(gvar->handle.debughandle,scratch,strlen(scratch));
1393 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1394 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1396 //fprintf(stdout, "%s", scratch);
1400 /*strcpy(scratch1, AARESET);
1401 strcat(scratch1, "========================================\n");
1402 strcat(scratch1, "near= ");
1403 ultoa (*(gvar->mm.nearheap),str,10);
1404 strcat (scratch1,str);
1405 strcat(scratch1, " far= ");
1406 ultoa (*(gvar->mm.farheap),str,10);
1407 strcat (scratch1,str);
1408 strcat(scratch1, "\n");
1409 //strcat(scratch1, "&near= %Fp ", &(gvar->mm.nearheap));
1410 //strcat(scratch1, "&far= %Fp", &(gvar->mm.farheap));
1411 //strcat(scratch1, "\n");
1412 strcat(scratch1, "========================================\n");
1413 write(gvar->handle.debughandle,scratch1,strlen(scratch1));*/
1416 CA_CloseDebug (gvar);
1419 //**** VW_SetLineWidth(64);
1420 //++++mh bufferofs = temp;
1423 //==========================================================================
1426 =====================
1430 =====================
1433 void MM_DumpData(global_game_variables_t *gvar)
1435 mmblocktype far *scan,far *best;
1436 long lowest,oldlowest;
1441 free(gvar->mm.nearheap);
1443 dumpfile = fopen ("mmdump.16b","w");
1446 dumpfile = fopen ("mmdump.16w","w");
1449 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1459 scan = gvar->mm.mmhead;
1462 owner = (unsigned)scan->useptr;
1464 if (owner && owner<lowest && owner > oldlowest)
1473 if (lowest != 0xffff)
1475 if (best->attributes & PURGEBITS)
1479 if (best->attributes & LOCKBIT)
1483 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1484 ,(unsigned)lowest,lock,purge,best->length);
1487 } while (lowest != 0xffff);
1490 printf("MMDUMP.16 created.\n");
1493 //==========================================================================
1497 ======================
1501 = Returns the total free space without purging
1503 ======================
1506 dword MM_UnusedMemory(global_game_variables_t *gvar)
1509 mmblocktype far *scan;
1512 scan = gvar->mm.mmhead;
1516 free += scan->next->start - (scan->start + scan->length);
1524 //==========================================================================
1528 ======================
1532 = Returns the total free space with purging
1534 ======================
1537 dword MM_TotalFree(global_game_variables_t *gvar)
1540 mmblocktype far *scan;
1543 scan = gvar->mm.mmhead;
1547 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1548 free += scan->length;
1549 free += scan->next->start - (scan->start + scan->length);
1557 //==========================================================================
1560 =====================
1564 =====================
1567 void MM_Report_(global_game_variables_t *gvar)
1569 printf("========================================\n");
1570 printf(" MM_Report_\n");
1571 printf("========================================\n");
1572 if(MML_CheckForEMS())
1574 printf(" %cLIMEMS %u\n", 0xC9, gvar->pm.emm.EMSPresent);
1575 printf(" %c%cEMM v%x.%x available\n", 0xC7, 0xC4, gvar->pm.emm.EMSVer>>4,gvar->pm.emm.EMSVer&0x0F);
1576 printf(" %c%ctotalEMSpages: %u ", 0xC7, 0xC4, gvar->pm.emm.totalEMSpages); printf("freeEMSpages: %u\n", gvar->pm.emm.freeEMSpages);
1577 printf(" %c%cEMSPageFrame: %04x\n", 0xC7, 0xC4, gvar->pm.emm.EMSPageFrame);
1578 printf(" %c%cEMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.EMSmem);
1580 if(MML_CheckForXMS())
1582 printf(" %cXMS %u\n", 0xC9, gvar->pm.xmm.XMSPresent);
1583 printf(" %c%cXMS v%x.%x available\n", 0xC7, 0xC4, XMSVer>>8,XMSVer&0x0F);
1584 printf(" %c%cXMSDriver: %Fp\n", 0xC7, 0xC4, XMSDriver);
1585 printf(" %c%cXMSHandle: %04x\n", 0xC7, 0xC4, gvar->pm.xmm.XMSHandle);
1586 printf(" %c%cXMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.XMSmem);
1588 printf(" %cConv. %u\n", 0xC9, gvar->pm.mm.MainPresent); DebugMemory_(gvar, 0);
1589 //printf("mainmem: %lu\n", gvar->mmi.mainmem);
1590 //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);
1591 //printf(" UnusedMemory: %lu\n", MM_UnusedMemory(gvar));
1592 printf("nearheap: %lu ", gvar->mmi.nearheap); printf("farheap: %lu\n", gvar->mmi.farheap);
1595 //==========================================================================
1598 =====================
1602 =====================
1605 void MM_EMSerr(byte *stri, byte err)
1607 //Returns a text string describing the error code in EMS.Error.
1611 strcat(stri, "successful");
1614 strcat(stri, "internal error");
1617 strcat(stri, "hardware malfunction");
1620 strcat(stri, "busy .. retry later");
1623 strcat(stri, "invalid handle");
1626 strcat(stri, "undefined function requested by application");
1629 strcat(stri, "no more handles available");
1632 strcat(stri, "error in save or restore of mapping context");
1635 strcat(stri, "insufficient memory pages in system");
1638 strcat(stri, "insufficient memory pages available");
1641 strcat(stri, "zero pages requested");
1644 strcat(stri, "invalid logical page number encountered");
1647 strcat(stri, "invalid physical page number encountered");
1650 strcat(stri, "page-mapping hardware state save area is full");
1653 strcat(stri, "save of mapping context failed");
1656 strcat(stri, "restore of mapping context failed");
1659 strcat(stri, "undefined subfunction");
1662 strcat(stri, "undefined attribute type");
1665 strcat(stri, "feature not supported");
1668 strcat(stri, "successful, but a portion of the source region has been overwritten");
1671 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1674 strcat(stri, "conventional and expanded memory regions overlap");
1677 strcat(stri, "offset within logical page exceeds size of logical page");
1680 strcat(stri, "region length exceeds 1 MB");
1683 strcat(stri, "source and destination EMS regions have same handle and overlap");
1686 strcat(stri, "memory source or destination type undefined");
1689 strcat(stri, "specified alternate map register or DMA register set not supported");
1692 strcat(stri, "all alternate map register or DMA register sets currently allocated");
1695 strcat(stri, "alternate map register or DMA register sets not supported");
1698 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1701 strcat(stri, "dedicated DMA channels not supported");
1704 strcat(stri, "specified dedicated DMA channel not supported");
1707 strcat(stri, "no such handle name");
1710 strcat(stri, "a handle found had no name, or duplicate handle name");
1713 strcat(stri, "attempted to wrap around 1M conventional address space");
1716 strcat(stri, "source array corrupted");
1719 strcat(stri, "operating system denied access");
1722 strcat(stri, "undefined error");
1726 //==========================================================================
1729 =====================
1733 =====================
1736 void MM_BombOnError(boolean bomb, global_game_variables_t *gvar)
1738 gvar->mm.bombonerror = bomb;
1741 /*void MM_GetNewBlock(global_game_variables_t *gvar)
1743 if(!gvar->mm.mmfree)
1744 MML_ClearBlock(gvar);
1745 gvar->mm.mmnew=gvar->mm.mmfree;
1746 gvar->mm.mmfree=gvar->mm.mmfree->next;
1747 if(!(gvar->mm.mmnew=gvar->mm.mmfree))
1749 printf("MM_GETNEWBLOCK: No free blocks!\n");
1752 gvar->mm.mmfree=gvar->mm.mmfree->next;
1755 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
1758 x->next=gvar->mm.mmfree;
1762 void xms_call(byte v, global_game_variables_t *gvar)
1764 dword XMSDriver = gvar->pm.xmm.XMSDriver;
1767 call [DWORD PTR XMSDriver]
1771 /*void MM_seguin(void)
1781 void MM_segude(void)
1789 pull data from far and put it into ds var