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"
56 =============================================================================
60 =============================================================================
63 void (* beforesort) (void);
64 void (* aftersort) (void);
65 void (* XMSaddr) (void); // far pointer to XMS driver
68 =============================================================================
72 =============================================================================
75 static char *ParmStringsexmm[] = {"noems","noxms",""};
78 ======================
82 = Routine from p36 of Extending DOS
84 =======================
87 boolean MML_CheckForEMS(void)
90 static char emmname[] = "EMMXXXX0"; //fix by andrius4669
91 // mov dx,OFFSET emmname
93 mov dx,OFFSET emmname //fix by andrius4669
95 int 0x21 // try to open EMMXXXX0 device
101 int 0x21 // get device info
109 int 0x21 // get status
115 int 0x21 // close handle
145 ======================
149 =======================
152 byte MML_SetupEMS(mminfo_t *mm)
156 boolean errorflag=false;
158 unsigned int EMSVer = 0;
160 unsigned totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle;
161 totalEMSpages = freeEMSpages = EMSpageframe = EMSpagesmapped = 0;
165 int EMS_INT // make sure EMS hardware is present
167 //mov [EMS_status],ah
174 mov [EMSVer],ax // set EMSVer
175 cmp al,0x32 // only work on ems 3.2 or greater
179 int EMS_INT // find the page frame address
182 mov [EMSpageframe],bx
185 int EMS_INT // find out how much EMS is there
188 mov [totalEMSpages],dx
189 mov [freeEMSpages],bx
191 jz noEMS // no EMS at all to allocate
195 cmp bx,[freeEMSpages]
197 mov bx,[freeEMSpages]
207 jle getpages // there is only 1,2,3,or 4 pages
208 mov bx,4 // we can't use more than 4 pages
216 mov [EMSpagesmapped],bx
217 mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS
243 strcpy(str,"MM_SetupEMS: EMS error ");
248 mm->totalEMSpages=totalEMSpages;
249 mm->freeEMSpages=freeEMSpages;
250 mm->EMSpageframe=EMSpageframe;
251 mm->EMSpagesmapped=EMSpagesmapped;
252 mm->EMShandle=EMShandle;
259 ======================
263 =======================
266 void MML_ShutdownEMS(mminfo_t *mm)
268 boolean errorflag=false;
269 unsigned EMShandle=mm->EMShandle;
287 if(errorflag==true) printf("MML_ShutdownEMS: Error freeing EMS!\n"); //++++ add something
295 = Maps the 64k of EMS used by memory manager into the page frame
296 = for general use. This only needs to be called if you are keeping
297 = other things in EMS.
302 byte MM_MapEMS(mminfo_t *mm, mminfotype *mmi)
307 boolean errorflag=false;
309 EMShandle=mm->EMShandle;
311 for (i=0;i<4/*MAPPAGES*/;i++)
315 mov bx,[i] // logical page
316 mov al,bl // physical page
317 mov dx,[EMShandle] // handle
340 strcpy(str,"MM_MapEMS: EMS error ");
346 mmi->EMSmem = (i)*0x4000lu;
347 //printf(" mmi->EMSmem=%lu\n", mmi->EMSmem);
351 byte MM_MapXEMS(mminfo_t *mm, mminfotype *mmi)
353 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
355 //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
356 //PhysicalStart = Physical page first logical page is mapped to
357 //LogicalStart = First logical page to map
358 //NumPages = Number of pages to map (1 to 4)
359 //Handle = EMS handle logical pages are allocated to
361 /*//Create a buffer containing the page information
362 // FOR x = 0 TO NumPages - 1
363 // MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
366 // Regs.ax = 0x5000 //Map the pages in the buffer
367 // Regs.cx = NumPages //to the pageframe
369 // Regs.ds = VARSEG(MapInfo$)
370 // Regs.si = SADD(MapInfo$)
371 // InterruptX 0x67, Regs, Regs
372 // EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100 //Store the status code
378 boolean errorflag=false;
380 EMShandle=mm->EMShandle;
385 for (i=0;i<MAPPAGES;i++)
389 mov cx,[i] // logical page
390 mov al,bl // physical page
391 mov dx,[EMShandle] // handle
414 //strcpy(str,"MM_MapXEMS: EMS error 0x");
415 strcpy(str,"MM_MapXEMS: EMS error ");
419 //printf("%s%x\n",str, err);
420 //printf("FACK! %x\n", err);
424 mmi->EMSmem = (i)*0x4000lu;
428 //==========================================================================
431 ======================
435 = Check for XMM driver
437 =======================
440 boolean MML_CheckForXMS(mminfo_t *mm)
442 boolean errorflag=false;
447 int 0x2f // query status of installed diver
458 if(errorflag==true) return false;
464 ======================
468 = Try to allocate all upper memory block
470 =======================
473 void MML_SetupXMS(mminfo_t *mm, mminfotype *mmi)
481 mov [WORD PTR XMSaddr],bx
482 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
485 mov dx,0xffff // try for largest block possible
486 //mov ax,dx // Set available Kbytes.
487 call [DWORD PTR XMSaddr]
491 cmp bl,0xb0 // error: smaller UMB is available
495 call [DWORD PTR XMSaddr] // DX holds largest available UMB
497 jz done // another error...
514 // printf("base=%u ", base); printf("size=%u\n", size);
515 MML_UseSpace(base,size, mm);
516 mmi->XMSmem += size*16;
517 mm->UMBbase[mm->numUMBs] = base;
519 if(mm->numUMBs < MAXUMBS)
525 ======================
529 ======================
532 void MML_ShutdownXMS(mminfo_t *mm)
537 for (i=0;i<mm->numUMBs;i++)
539 base = mm->UMBbase[i];
543 call [DWORD PTR XMSaddr]
548 //==========================================================================
551 ======================
555 = Marks a range of paragraphs as usable by the memory manager
556 = This is used to mark space for the near heap, far heap, ems page frame,
557 = and upper memory blocks
559 ======================
562 void MML_UseSpace(word segstart, dword seglength, mminfo_t *mm)
564 mmblocktype huge *scan,huge *last;
567 dword segmlen=seglength;
570 scan = last = mm->mmhead;
571 mm->mmrover = mm->mmhead; // reset rover to start of memory
574 // search for the block that contains the range of segments
576 while(scan->start+scan->length < segstart)
582 //find out how many blocks it spans!
584 for(;seglength>0x10000;seglength-=0xffff)
586 printf(" seglen=%lu\n", seglength);
591 // take the given range out of the block
593 oldend = scan->start + scan->length;
594 extra = oldend - (segstart+(word)seglength);
596 if(segm>1 || extra>0x10000lu)
609 //MML_UseSpace(segstart, seglength, mm);
615 printf("MML_UseSpace: Segment spans two blocks!\n");
617 printf("========================================\n");
618 printf("segm=%u ", segm);
619 printf("ex=%lu ", extra);
620 printf("old=%u ", oldend);
621 printf("start+seglen=%lu\n", segstart+seglength);
622 printf("segsta=%x ", segstart);
623 printf("len=%lu ", scan->length);
624 printf("seglen=%lu ", seglength);
625 printf("segmlen=%lu\n", segmlen);
626 printf("========================================\n");
628 //++++todo: linked list of segment!
629 if(segstart == scan->start)
631 last->next = scan->next; // unlink block
636 scan->length = segstart-scan->start; // shorten block
641 mm->mmnew->next = scan->next;
642 scan->next = mm->mmnew;
643 mm->mmnew->start = segstart+seglength;
644 mm->mmnew->length = extra;
645 mm->mmnew->attributes = LOCKBIT;
646 }//else if(segm>0) goto segu;
650 //==========================================================================
657 = We are out of blocks, so free a purgable block
662 void MML_ClearBlock(mminfo_t *mm)
664 mmblocktype huge *scan,huge *last;
666 scan = mm->mmhead->next;
670 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
672 MM_FreePtr(scan->useptr, mm);
678 printf("MM_ClearBlock: No purgable blocks!\n");
682 //==========================================================================
689 = Grabs all space from turbo with malloc/farmalloc
690 = Allocates bufferseg misc buffer
695 void MM_Startup(mminfo_t *mm, mminfotype *mmi)
698 dword length,seglength;
699 //dword length; word seglength;
701 word segstart;//,endfree;
706 mm->mmstarted = true;
707 mm->bombonerror = true;
711 // set up the linked list (everything in the free list;
714 mm->mmfree = &(mm->mmblocks[0]);
715 for(i=0;i<MAXBLOCKS-1;i++)
717 mm->mmblocks[i].next = &(mm->mmblocks[i+1]);
719 mm->mmblocks[i].next = NULL;
722 // locked block of all memory until we punch out free space
725 mm->mmhead = mm->mmnew; // this will allways be the first node
726 mm->mmnew->start = 0;
727 mm->mmnew->length = 0xffff;
728 mm->mmnew->attributes = LOCKBIT;
729 mm->mmnew->next = NULL;
730 mm->mmrover = mm->mmhead;
733 // get all available near conventional memory segments
737 length=(dword)_memavl();//(dword)GetFreeSize();
738 start = (void huge *)(mm->nearheap = _nmalloc(length));
742 start = (void huge *)(mm->nearheap = malloc(length));
744 length -= 16-(FP_OFF(start)&15);
745 length -= SAVENEARHEAP;
746 seglength = length / 16; // now in paragraphs
747 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
748 MML_UseSpace(segstart,seglength, mm);
749 mmi->nearheap = length;
750 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
753 // get all available far conventional memory segments
755 //printf("_FARCORELEFT %lu\n", _FCORELEFT);
760 printf("farcoreleft() %lu\n", farcoreleft());
761 printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
763 length=_FCORELEFT;//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
764 start = mm->farheap = _fmalloc(length);
765 //start = mm->farheap = halloc(length, 1);
766 length -= 16-(FP_OFF(start)&15);
767 length -= SAVEFARHEAP;
768 seglength = length / 16; // now in paragraphs
769 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
770 MML_UseSpace(segstart,seglength, mm);
771 mmi->farheap = length;
772 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
774 mmi->mainmem = mmi->nearheap + mmi->farheap;
777 // detect EMS and allocate up to 64K at page frame
796 ,ParmStringsexmm) == 0)
797 goto emsskip; // param NOEMS
799 if(MML_CheckForEMS())
801 MML_SetupEMS(mm); // allocate space
802 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
803 MML_UseSpace(mm->EMSpageframe,(MAPPAGES)*0x4000lu, mm);
804 //if(mm->EMSVer<0x40)
805 MM_MapEMS(mm, mmi); // map in used pages
807 //MM_MapXEMS(mm, mmi); // map in used pages
811 // detect XMS and get upper memory blocks
832 ,ParmStringsexmm) == 0)
833 goto xmsskip; // param NOXMS
835 if(MML_CheckForXMS(mm))
837 MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible
841 // allocate the misc buffer
844 mm->mmrover = mm->mmhead; // start looking for space after low block
846 MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);
849 //==========================================================================
856 = Frees all conventional, EMS, and XMS allocated
861 void MM_Shutdown(mminfo_t *mm)
866 _ffree(mm->farheap);// printf(" far freed\n");
868 _nfree(mm->nearheap);// printf(" near freed\n");
871 free(mm->nearheap);// printf(" near freed\n");
873 if(MML_CheckForEMS()){ MML_ShutdownEMS(mm); }//printf(" EMS freed\n"); }
874 if(MML_CheckForXMS(mm)){ MML_ShutdownXMS(mm); }//printf(" XMS freed\n"); }
877 //==========================================================================
884 = Allocates an unlocked, unpurgable block
889 void MM_GetPtr(memptr *baseptr,dword size, mminfo_t *mm, mminfotype *mmi)
891 mmblocktype huge *scan,huge *lastscan,huge *endscan,huge *purge,huge *next;
896 needed = (size+15)/16; // convert size from bytes to paragraphs
898 GETNEWBLOCK; // fill in start and next after a spot is found
899 mm->mmnew->length = needed;
900 mm->mmnew->useptr = baseptr;
901 mm->mmnew->attributes = BASEATTRIBUTES;
903 for(search = 0; search<mm->endid; search++)
905 printf(" [case]"); //0000
907 // first search: try to allocate right after the rover, then on up
908 // second search: search from the head pointer up to the rover
909 // third search: compress memory, then scan from start
910 if(search == 1 && mm->mmrover == mm->mmhead)
917 lastscan = mm->mmrover;
918 scan = mm->mmrover->next;
923 lastscan = mm->mmhead;
924 scan = mm->mmhead->next;
925 endscan = mm->mmrover;
930 lastscan = mm->mmhead;
931 scan = mm->mmhead->next;
936 startseg = lastscan->start + (word)lastscan->length;
938 while(scan != endscan)
940 //printf(","); //0000
941 if(scan->start - startseg >= needed)
945 // got enough space between the end of lastscan and
946 // the start of scan, so throw out anything in the middle
947 // and allocate the new block
949 purge = lastscan->next;
950 lastscan->next = mm->mmnew;
951 mm->mmnew->start = *(word *)baseptr = startseg;
952 mm->mmnew->next = scan;
954 { // free the purgable block
955 printf(" freeing block~\n"); //0000
958 //MM_FreeBlock(purge, mm);
959 purge = next; // purge another if not at scan
961 mm->mmrover = mm->mmnew;
962 return; // good allocation!
966 // if this block is purge level zero or locked, skip past it
968 if((scan->attributes & LOCKBIT)
969 || !(scan->attributes & PURGEBITS) )
971 printf(" [lock] "); //0000
972 printf("len=%lu ", scan->length);
974 startseg = lastscan->start + (word)lastscan->length;
978 scan=scan->next; // look at next line
987 printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));
988 printf("for stability reasons the program will shut down! wwww\n");
989 printf(" endid=%u\n",(mm->endid));
997 //==========================================================================
1000 ====================
1004 = Allocates an unlocked, unpurgable block
1006 ====================
1009 void MM_FreePtr(memptr *baseptr, mminfo_t *mm)
1011 mmblocktype huge *scan,huge *last;
1016 if(baseptr == mm->mmrover->useptr) // removed the last allocated block
1017 mm->mmrover = mm->mmhead;
1019 while(scan->useptr != baseptr && scan)
1027 printf("MM_FreePtr: Block not found!\n");
1031 last->next = scan->next;
1035 //==========================================================================
1038 =====================
1042 = Sets the purge level for a block (locked blocks cannot be made purgable)
1044 =====================
1047 void MM_SetPurge(memptr *baseptr, int purge, mminfo_t *mm)
1049 mmblocktype huge *start;
1051 start = mm->mmrover;
1055 if(mm->mmrover->useptr == baseptr)
1058 mm->mmrover = mm->mmrover->next;
1061 mm->mmrover = mm->mmhead;
1062 else if(mm->mmrover == start)
1064 printf("MM_SetPurge: Block not found!");
1070 mm->mmrover->attributes &= ~PURGEBITS;
1071 mm->mmrover->attributes |= purge;
1074 //==========================================================================
1077 =====================
1081 = Locks / unlocks the block
1083 =====================
1086 void MM_SetLock(memptr *baseptr, boolean locked, mminfo_t *mm)
1088 mmblocktype huge *start;
1090 start = mm->mmrover;
1094 if(mm->mmrover->useptr == baseptr)
1097 mm->mmrover = mm->mmrover->next;
1100 mm->mmrover = mm->mmhead;
1101 else if(mm->mmrover == start)
1103 printf("MM_SetLock: Block not found!");
1109 mm->mmrover->attributes &= ~LOCKBIT;
1110 mm->mmrover->attributes |= locked*LOCKBIT;
1113 //==========================================================================
1116 =====================
1120 = Throws out all purgable stuff and compresses movable blocks
1122 =====================
1125 void MM_SortMem(mminfo_t *mm)
1127 mmblocktype huge *scan,huge *last,huge *next;
1128 unsigned start,length,source,dest,oldborder;
1132 // lock down a currently playing sound
1134 /*++++ playing = SD_SoundPlaying ();
1140 playing += STARTPCSOUNDS;
1143 playing += STARTADLIBSOUNDS;
1146 MM_SetLock(&(memptr)audiosegs[playing],true);
1151 // oldborder = bordercolor;
1152 // VW_ColorBorder (15);
1159 last = NULL; // shut up compiler warning
1163 if(scan->attributes & LOCKBIT)
1166 // block is locked, so try to pile later blocks right after it
1168 start = scan->start + scan->length;
1172 if(scan->attributes & PURGEBITS)
1175 // throw out the purgable block
1179 //MM_FreeBlock(scan, mm);
1187 // push the non purgable block on top of the last moved block
1189 if(scan->start != start)
1191 length = scan->length;
1192 source = scan->start;
1194 while(length > 0xf00)
1196 movedata(source,0,dest,0,0xf00*16);
1201 movedata(source,0,dest,0,length*16);
1203 scan->start = start;
1204 *(unsigned *)scan->useptr = start;
1206 start = scan->start + scan->length;
1211 scan = scan->next; // go to next block
1214 mm->mmrover = mm->mmhead;
1219 // VW_ColorBorder (oldborder);
1222 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1225 //==========================================================================
1228 =====================
1232 =====================
1235 void MM_ShowMemory(global_game_variables_t *gvar,/*page_t *page, */mminfo_t *mm)
1237 mmblocktype huge *scan;
1243 byte scratch[160],scratch0[4096],str[16];
1245 //**** VW_SetDefaultColors();
1246 //**** VW_SetLineWidth(40);
1247 //++++mh temp = bufferofs;
1248 //++++mh bufferofs = 0;
1249 //**** VW_SetScreen (0,0);
1253 CA_OpenDebug (gvar);
1257 strcpy(scratch, AARESET);
1258 if(scan->attributes & PURGEBITS)
1259 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
1261 strcpy(scratch0, AABLUE); // medium blue = non purgable
1262 if(scan->attributes & LOCKBIT)
1263 strcpy(scratch0, AARED); // red = locked
1264 if(scan->start<=end)
1266 printf("\nend==%d\n\n", end);
1267 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1268 strcat(scratch, "End's Size: ");
1270 strcat (scratch,str);
1271 strcat(scratch, "\nscan->start's Size: ");
1272 ultoa (scan->start,str,10);
1273 strcat (scratch,str);
1274 write(gvar->handle.debughandle,scratch,strlen(scratch));
1275 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1278 //for(;scan->length>0xfffflu;scan->length-=0xfffflu);
1279 end = scan->start+(scan->length)-1;
1280 //++++ chy = scan->start/320;
1281 //++++ chx = scan->start%320;
1282 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1283 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1285 //++++ modexClearRegion(page, chx, chy, 4, 4, color);
1287 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1288 for(w=(scan->start)/80;w<=end/80;w++)
1290 //printf("+ %u %lu\n", w, scan->length);
1291 //if(w==48) getch();
1292 strcat(scratch0, "+");
1294 strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1295 //++++ VW_Plot(scan->start,0,15);
1296 //++++ modexClearRegion(page, chx, chy, 4, 4, 15);
1297 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1298 if((scan->next->start != 0xe000) > end)
1300 strcat(scratch0, AARESET);
1301 strcat(scratch0,AAGREEN);
1302 for(w=0;w<=((scan->length+1)/80);w++)
1304 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
1305 strcat(scratch0,"0");
1308 strcat(scratch0, AARESET);
1309 strcat(scratch0,AAGREEN);
1310 for(w=0;w<=((scan->length+1)/80);w++)
1312 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
1313 strcat(scratch0,"0");
1315 printf("================\nstart=%x length==%lu\n next=%x end=%x\nscan->start+(scan->length)==%x\n================\n", scan->start, scan->length, scan->next->start, end, scan->start+(scan->length));
1316 printf("w=%u (scan->length+1)/80)=%lu\n\n", w, (scan->length+1)/80);
1319 strcat(scratch0, AARESET);
1320 strcat(scratch0,"\n");
1321 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1323 // chx+=scan->next->start;
1324 // modexClearRegion(page, chx, chy, 4, 4, 2);
1326 //modexhlin(page, end+1,scan->next->start, chy, 0);
1327 /* y = scan->start/320;
1328 x = scan->start%320;
1329 VW_Hlin(x,x+end,y,color);
1331 //++++ VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1332 strcat(scratch,"Seg:");
1333 ultoa (scan->start,str,16);
1334 strcat (scratch,str);
1335 strcat (scratch,"\tSize:");
1336 ultoa ((word)scan->length,str,10);
1337 strcat (scratch,str);
1338 strcat (scratch,"\tOwner:0x");
1339 owner = (unsigned)scan->useptr;
1340 ultoa (owner,str,16);
1341 strcat (scratch,str);
1342 strcat (scratch,"\n");
1343 write(gvar->handle.debughandle,scratch,strlen(scratch));
1344 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1345 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1347 //fprintf(stdout, "%s", scratch);
1352 CA_CloseDebug (gvar);
1355 //**** VW_SetLineWidth(64);
1356 //++++mh bufferofs = temp;
1359 //==========================================================================
1362 =====================
1366 =====================
1369 void MM_DumpData(mminfo_t *mm)
1371 mmblocktype huge *scan,huge *best;
1372 long lowest,oldlowest;
1378 dumpfile = fopen ("mmdump.16","w");
1380 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1393 owner = (word)scan->useptr;
1395 if (owner && owner<lowest && owner > oldlowest)
1404 if (lowest != 0xffff)
1406 if (best->attributes & PURGEBITS)
1410 if (best->attributes & LOCKBIT)
1414 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1415 ,(word)lowest,lock,purge,best->length);
1418 } while (lowest != 0xffff);
1421 printf("MMDUMP.16 created.\n");
1424 //==========================================================================
1428 ======================
1432 = Returns the total free space without purging
1434 ======================
1437 dword MM_UnusedMemory(mminfo_t *mm)
1440 mmblocktype huge *scan;
1447 free += scan->next->start - (scan->start + scan->length);
1455 //==========================================================================
1459 ======================
1463 = Returns the total free space with purging
1465 ======================
1468 dword MM_TotalFree(mminfo_t *mm)
1471 mmblocktype huge *scan;
1478 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1479 free += scan->length;
1480 free += scan->next->start - (scan->start + scan->length);
1488 //==========================================================================
1491 =====================
1495 =====================
1498 void MM_Report(/*page_t *page, */mminfo_t *mm, mminfotype *mmi)
1500 if(MML_CheckForEMS())
1502 printf("EMM v%x.%x available\n", mm->EMSVer>>4,mm->EMSVer&0x0F);
1503 printf("totalEMSpages=%u\n", mm->totalEMSpages);
1504 printf("freeEMSpages=%u\n", mm->freeEMSpages);
1505 printf("EMSpageframe=%x\n", mm->EMSpageframe);
1507 if(MML_CheckForXMS(mm)) printf("XMSaddr=%X\n", *XMSaddr);
1508 printf("near=%lu\n", mmi->nearheap);
1509 printf("far=%lu\n", mmi->farheap);
1510 printf("EMSmem=%lu\n", mmi->EMSmem);
1511 printf("XMSmem=%lu\n", mmi->XMSmem);
1512 printf("mainmem=%lu\n", mmi->mainmem);
1513 printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));
1514 printf("TotalFree=%lu\n", MM_TotalFree(mm));
1515 printf("TotalUsed=%lu\n", mmi->mainmem+mmi->EMSmem+mmi->XMSmem+mmi->XMSmem);
1518 //==========================================================================
1521 =====================
1525 =====================
1528 void MM_EMSerr(byte *stri, byte err)
1530 //Returns a text string describing the error code in EMS.Error.
1534 strcat(stri, "successful");
1537 strcat(stri, "internal error");
1540 strcat(stri, "hardware malfunction");
1543 strcat(stri, "busy .. retry later");
1546 strcat(stri, "invalid handle");
1549 strcat(stri, "undefined function requested by application");
1552 strcat(stri, "no more handles available");
1555 strcat(stri, "error in save or restore of mapping context");
1558 strcat(stri, "insufficient memory pages in system");
1561 strcat(stri, "insufficient memory pages available");
1564 strcat(stri, "zero pages requested");
1567 strcat(stri, "invalid logical page number encountered");
1570 strcat(stri, "invalid physical page number encountered");
1573 strcat(stri, "page-mapping hardware state save area is full");
1576 strcat(stri, "save of mapping context failed");
1579 strcat(stri, "restore of mapping context failed");
1582 strcat(stri, "undefined subfunction");
1585 strcat(stri, "undefined attribute type");
1588 strcat(stri, "feature not supported");
1591 strcat(stri, "successful, but a portion of the source region has been overwritten");
1594 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1597 strcat(stri, "conventional and expanded memory regions overlap");
1600 strcat(stri, "offset within logical page exceeds size of logical page");
1603 strcat(stri, "region length exceeds 1 MB");
1606 strcat(stri, "source and destination EMS regions have same handle and overlap");
1609 strcat(stri, "memory source or destination type undefined");
1612 strcat(stri, "specified alternate map register or DMA register set not supported");
1615 strcat(stri, "all alternate map register or DMA register sets currently allocated");
1618 strcat(stri, "alternate map register or DMA register sets not supported");
1621 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1624 strcat(stri, "dedicated DMA channels not supported");
1627 strcat(stri, "specified dedicated DMA channel not supported");
1630 strcat(stri, "no such handle name");
1633 strcat(stri, "a handle found had no name, or duplicate handle name");
1636 strcat(stri, "attempted to wrap around 1M conventional address space");
1639 strcat(stri, "source array corrupted");
1642 strcat(stri, "operating system denied access");
1645 strcat(stri, "undefined error");
1649 //==========================================================================
1652 =====================
1656 =====================
1659 void MM_BombOnError(boolean bomb, mminfo_t *mm)
1661 mm->bombonerror = bomb;
1664 /*void MM_GetNewBlock(mminfo_t *mm)
1668 mm->mmnew=mm->mmfree;
1669 mm->mmfree=mm->mmfree->next;
1670 if(!(mm->mmnew=mm->mmfree))
1672 printf("MM_GETNEWBLOCK: No free blocks!\n");
1675 mm->mmfree=mm->mmfree->next;
1676 mm->endid++; //end of list
1679 void MM_FreeBlock(mmblocktype *x, mminfo_t *mm)
1684 mm->endid--; //end of list
1687 void MM_seguin(void)
1697 void MM_segude(void)
1705 pull data from far and put it into ds var