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"
52 =============================================================================
56 =============================================================================
59 void (* beforesort) (void);
60 void (* aftersort) (void);
61 void (* XMSaddr) (void); // far pointer to XMS driver
64 =============================================================================
68 =============================================================================
71 static char *ParmStringsexmm[] = {"noems","noxms",""};
74 ======================
78 = Routine from p36 of Extending DOS
80 =======================
83 boolean MML_CheckForEMS(void)
86 static char emmname[] = "EMMXXXX0"; //fix by andrius4669
87 // mov dx,OFFSET emmname
89 //LEA DX, emmname //fix by andrius4669
90 mov dx,OFFSET emmname //fix by andrius4669
92 int 0x21 // try to open EMMXXXX0 device
98 int 0x21 // get device info
106 int 0x21 // get status
112 int 0x21 // close handle
131 ======================
135 =======================
138 byte MML_SetupEMS(mminfo_t *mm)
140 char str[80];//,str2[10];
142 boolean errorflag=false;
144 unsigned int EMSVer = 0;
146 unsigned totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle;
147 totalEMSpages = freeEMSpages = EMSpageframe = EMSpagesmapped = 0;
152 int EMS_INT // make sure EMS hardware is present
154 //mov [EMS_status],ah
161 mov [EMSVer],ax // set EMSVer
162 cmp al,0x32 // only work on ems 3.2 or greater
166 int EMS_INT // find the page frame address
169 mov [EMSpageframe],bx
172 int EMS_INT // find out how much EMS is there
175 mov [totalEMSpages],dx
176 mov [freeEMSpages],bx
178 jz noEMS // no EMS at all to allocate
182 cmp bx,[freeEMSpages]
184 mov bx,[freeEMSpages]
189 jle getpages // there is only 1,2,3,or 4 pages
190 mov bx,4 // we can't use more than 4 pages
193 mov [EMSpagesmapped],bx
194 mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS
209 //err = CPURegs.h.ah;
210 strcpy(str,"MM_SetupEMS: EMS error");
212 strcat(str,MM_EMSerr(err));
216 mm->totalEMSpages=totalEMSpages;
217 mm->freeEMSpages=freeEMSpages;
218 mm->EMSpageframe=EMSpageframe;
219 mm->EMSpagesmapped=EMSpagesmapped;
220 mm->EMShandle=EMShandle;
227 ======================
231 =======================
234 void MML_ShutdownEMS(mminfo_t *mm)
236 boolean errorflag=false;
237 unsigned EMShandle=mm->EMShandle;
251 if(errorflag==true) printf("MML_ShutdownEMS: Error freeing EMS!\n"); //++++ add something
259 = Maps the 64k of EMS used by memory manager into the page frame
260 = for general use. This only needs to be called if you are keeping
261 = other things in EMS.
266 byte MM_MapEMS(mminfo_t *mm, mminfotype *mmi)
271 boolean errorflag=false;
273 EMShandle=mm->EMShandle;
275 for (i=0;i<4/*MAPPAGES*/;i++)
280 mov bx,[i] // logical page
281 mov al,bl // physical page
282 mov dx,[EMShandle] // handle
294 //err = CPURegs.h.ah;
295 strcpy(str,"MM_MapEMS: EMS error");
297 strcat(str,MM_EMSerr(err));
299 //printf("FACK! %x\n", err);
303 mmi->EMSmem = (i)*0x4000lu;
307 byte MM_MapXEMS(mminfo_t *mm, mminfotype *mmi)
310 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
312 //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
313 //PhysicalStart = Physical page first logical page is mapped to
314 //LogicalStart = First logical page to map
315 //NumPages = Number of pages to map (1 to 4)
316 //Handle = EMS handle logical pages are allocated to
318 /*//Create a buffer containing the page information
319 // FOR x = 0 TO NumPages - 1
320 // MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
323 // Regs.ax = 0x5000 //Map the pages in the buffer
324 // Regs.cx = NumPages //to the pageframe
326 // Regs.ds = VARSEG(MapInfo$)
327 // Regs.si = SADD(MapInfo$)
328 // InterruptX 0x67, Regs, Regs
329 // EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100 //Store the status code
335 boolean errorflag=false;
337 EMShandle=mm->EMShandle;
342 for (i=0;i<MAPPAGES;i++)
347 mov cx,[i] // logical page
348 mov al,bl // physical page
349 mov dx,[EMShandle] // handle
361 //err = CPURegs.h.ah;
362 //strcpy(str,"MM_MapXEMS: EMS error 0x");
363 strcpy(str,"MM_MapXEMS: EMS error");
365 strcat(str,MM_EMSerr(err));
367 //printf("%s%x\n",str, err);
368 //printf("FACK! %x\n", err);
372 mmi->EMSmem = (i)*0x4000lu;
376 //==========================================================================
379 ======================
383 = Check for XMM driver
385 =======================
388 boolean MML_CheckForXMS(mminfo_t *mm)
390 boolean errorflag=false;
396 int 0x2f // query status of installed diver
402 if(errorflag==true) return false;
408 ======================
412 = Try to allocate all upper memory block
414 =======================
417 void MML_SetupXMS(mminfo_t *mm, mminfotype *mmi)
426 mov [WORD PTR XMSaddr],bx
427 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
430 mov dx,0xffff // try for largest block possible
431 //mov ax,dx // Set available Kbytes.
432 call [DWORD PTR XMSaddr]
436 cmp bl,0xb0 // error: smaller UMB is available
440 call [DWORD PTR XMSaddr] // DX holds largest available UMB
442 jz done // another error...
449 printf("base=%u ", base); printf("size=%u\n", size);
450 MML_UseSpace(base,size, mm);
451 mmi->XMSmem += size*16;
452 mm->UMBbase[mm->numUMBs] = base;
454 if(mm->numUMBs < MAXUMBS)
460 ======================
464 ======================
467 void MML_ShutdownXMS(mminfo_t *mm)
472 for (i=0;i<mm->numUMBs;i++)
474 base = mm->UMBbase[i];
479 call [DWORD PTR XMSaddr]
484 //==========================================================================
487 ======================
491 = Marks a range of paragraphs as usable by the memory manager
492 = This is used to mark space for the near heap, far heap, ems page frame,
493 = and upper memory blocks
495 ======================
498 void MML_UseSpace(/*d*/word segstart, dword seglength, mminfo_t *mm)
500 mmblocktype huge *scan,huge *last;
505 scan = last = mm->mmhead;
506 mm->mmrover = mm->mmhead; // reset rover to start of memory
509 // search for the block that contains the range of segments
511 while(scan->start+scan->length < segstart)
517 //find out how many blocks it spans!
518 if(seglength>0xffffu)
520 // segm=seglength/0x4000u;
521 segm=seglength/0xffffu;
526 if(segm>1/*extra>0xfffflu*/)
537 //MML_UseSpace(?segstart?, ?length?, mm);
543 //printf("MML_UseSpace: Segment spans two blocks!\n");
547 // take the given range out of the block
549 oldend = scan->start + scan->length;
550 extra = oldend - (segstart+seglength);
552 printf("segm=%u ", segm);
553 printf("ex=%lu ", extra);
554 printf("start+seglen=%lu ", segstart+seglength);
555 printf("len=%u ", scan->length);
556 printf("segsta=%x ", segstart);
557 printf("seglen=%lu\n", seglength);
560 //++++todo: linked list of segment!
561 //printf("segm=%lu\n", segm);
562 if(segstart == scan->start)
564 last->next = scan->next; // unlink block
565 MM_FreeBlock(scan, mm);
569 scan->length = segstart-scan->start; // shorten block
576 mm->mmnew->next = scan->next;
577 scan->next = mm->mmnew;
578 mm->mmnew->start = segstart+seglength;
579 mm->mmnew->length = extra;
580 mm->mmnew->attributes = LOCKBIT;
581 }//else if(segm>0) goto segu;
585 //==========================================================================
592 = We are out of blocks, so free a purgable block
597 void MML_ClearBlock(mminfo_t *mm)
599 mmblocktype huge *scan,huge *last;
601 scan = mm->mmhead->next;
605 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
607 MM_FreePtr(scan->useptr, mm);
613 printf("MM_ClearBlock: No purgable blocks!\n");
617 //==========================================================================
624 = Grabs all space from turbo with malloc/farmalloc
625 = Allocates bufferseg misc buffer
630 void MM_Startup(mminfo_t *mm, mminfotype *mmi)
635 unsigned segstart,seglength,endfree;
640 mm->mmstarted = true;
641 mm->bombonerror = true;
643 // set up the linked list (everything in the free list;
646 mm->mmfree = &(mm->mmblocks[0]);
647 for(i=0;i<MAXBLOCKS-1;i++)
649 mm->mmblocks[i].next = &(mm->mmblocks[i+1]);
651 mm->mmblocks[i].next = NULL;
654 // locked block of all memory until we punch out free space
657 mm->mmhead = mm->mmnew; // this will allways be the first node
658 mm->mmnew->start = 0;
659 mm->mmnew->length = 0xffff;
660 mm->mmnew->attributes = LOCKBIT;
661 mm->mmnew->next = NULL;
662 mm->mmrover = mm->mmhead;
664 // farlen=_bios_memsize()*1024;
667 // get all available near conventional memory segments
669 //---- length=coreleft();
672 start = (void huge *)(mm->nearheap = malloc(length));
673 length -= 16-(FP_OFF(start)&15);
674 length -= SAVENEARHEAP;
675 seglength = length / 16; // now in paragraphs
676 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
677 MML_UseSpace(segstart,seglength, mm);
678 mmi->nearheap = length;
679 //printf("near heap ok!\n");
682 // get all available far conventional memory segments
684 //---- length=farcoreleft();
687 start = mm->farheap = halloc(length, sizeof(byte));
688 //start = mm->farheap = _fmalloc(length);
689 length -= 16-(FP_OFF(start)&15);
690 length -= SAVEFARHEAP;
691 seglength = length / 16; // now in paragraphs
692 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
693 MML_UseSpace(segstart,seglength, mm);
694 mmi->farheap = length;
695 mmi->mainmem = mmi->nearheap + mmi->farheap;
696 //printf("far heap ok!\n");
700 // detect EMS and allocate up to 64K at page frame
702 printf("EMS1\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); //bug!
704 for(i = 1;i < __argc;i++)
706 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
707 goto emsskip; // param NOEMS
709 printf("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); //bug!
710 if(MML_CheckForEMS())
713 MML_SetupEMS(mm); // allocate space
715 printf("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); //bug!
716 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
717 MML_UseSpace(mm->EMSpageframe,(MAPPAGES)*0x4000lu, mm);
720 MM_MapEMS(mm, mmi); // map in used pages
722 MM_MapXEMS(mm, mmi); // map in used pages
726 // detect XMS and get upper memory blocks
730 for(i = 1;i < __argc;i++)
732 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
733 goto xmsskip; // param NOXMS
735 printf("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); //bug!
736 if(MML_CheckForXMS(mm))
739 //MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible
743 // allocate the misc buffer
746 mm->mmrover = mm->mmhead; // start looking for space after low block
748 MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);
751 //==========================================================================
758 = Frees all conventional, EMS, and XMS allocated
763 void MM_Shutdown(mminfo_t *mm)
769 printf("far freed\n");
771 printf("near freed\n");
772 //hfree(mm->hugeheap);
773 //printf("huge freed\n");
774 if(MML_CheckForEMS()){ MML_ShutdownEMS(mm); printf("EMS freed\n"); }
775 if(MML_CheckForXMS(mm)){ MML_ShutdownXMS(mm); printf("XMS freed\n"); }
778 //==========================================================================
785 = Allocates an unlocked, unpurgable block
790 void MM_GetPtr(memptr *baseptr,dword size, mminfo_t *mm, mminfotype *mmi)
792 mmblocktype huge *scan,huge *lastscan,huge *endscan,huge *purge,huge *next;
794 unsigned needed,startseg;
796 needed = (size+15)/16; // convert size from bytes to paragraphs
798 MM_GetNewBlock(mm); // fill in start and next after a spot is found
799 mm->mmnew->length = needed;
800 mm->mmnew->useptr = baseptr;
801 mm->mmnew->attributes = BASEATTRIBUTES;
803 for(search = 0; search<3; search++)
806 // first search: try to allocate right after the rover, then on up
807 // second search: search from the head pointer up to the rover
808 // third search: compress memory, then scan from start
809 if(search == 1 && mm->mmrover == mm->mmhead)
815 lastscan = mm->mmrover;
816 scan = mm->mmrover->next;
820 lastscan = mm->mmhead;
821 scan = mm->mmhead->next;
822 endscan = mm->mmrover;
826 lastscan = mm->mmhead;
827 scan = mm->mmhead->next;
832 startseg = lastscan->start + lastscan->length;
834 while(scan != endscan)
836 if(scan->start - startseg >= needed)
839 // got enough space between the end of lastscan and
840 // the start of scan, so throw out anything in the middle
841 // and allocate the new block
843 purge = lastscan->next;
844 lastscan->next = mm->mmnew;
845 mm->mmnew->start = *(unsigned *)baseptr = startseg;
846 mm->mmnew->next = scan;
848 { // free the purgable block
850 MM_FreeBlock(purge, mm);
851 purge = next; // purge another if not at scan
853 mm->mmrover = mm->mmnew;
854 return; // good allocation!
858 // if this block is purge level zero or locked, skip past it
860 if((scan->attributes & LOCKBIT)
861 || !(scan->attributes & PURGEBITS) )
864 startseg = lastscan->start + lastscan->length;
868 scan=scan->next; // look at next line
873 printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));
878 //==========================================================================
885 = Allocates an unlocked, unpurgable block
890 void MM_FreePtr(memptr *baseptr, mminfo_t *mm)
892 mmblocktype huge *scan,huge *last;
897 if(baseptr == mm->mmrover->useptr) // removed the last allocated block
898 mm->mmrover = mm->mmhead;
900 while(scan->useptr != baseptr && scan)
908 printf("MM_FreePtr: Block not found!\n");
912 last->next = scan->next;
914 MM_FreeBlock(scan, mm);
916 //==========================================================================
919 =====================
923 = Sets the purge level for a block (locked blocks cannot be made purgable)
925 =====================
928 void MM_SetPurge(memptr *baseptr, int purge, mminfo_t *mm)
930 mmblocktype huge *start;
936 if(mm->mmrover->useptr == baseptr)
939 mm->mmrover = mm->mmrover->next;
942 mm->mmrover = mm->mmhead;
943 else if(mm->mmrover == start)
945 printf("MM_SetPurge: Block not found!");
951 mm->mmrover->attributes &= ~PURGEBITS;
952 mm->mmrover->attributes |= purge;
955 //==========================================================================
958 =====================
962 = Locks / unlocks the block
964 =====================
967 void MM_SetLock(memptr *baseptr, boolean locked, mminfo_t *mm)
969 mmblocktype huge *start;
975 if(mm->mmrover->useptr == baseptr)
978 mm->mmrover = mm->mmrover->next;
981 mm->mmrover = mm->mmhead;
982 else if(mm->mmrover == start)
984 printf("MM_SetLock: Block not found!");
990 mm->mmrover->attributes &= ~LOCKBIT;
991 mm->mmrover->attributes |= locked*LOCKBIT;
994 //==========================================================================
997 =====================
1001 = Throws out all purgable stuff and compresses movable blocks
1003 =====================
1006 void MM_SortMem(mminfo_t *mm)
1008 mmblocktype huge *scan,huge *last,huge *next;
1009 unsigned start,length,source,dest,oldborder;
1013 // lock down a currently playing sound
1015 /*++++ playing = SD_SoundPlaying ();
1021 playing += STARTPCSOUNDS;
1024 playing += STARTADLIBSOUNDS;
1027 MM_SetLock(&(memptr)audiosegs[playing],true);
1032 // oldborder = bordercolor;
1033 // VW_ColorBorder (15);
1040 last = NULL; // shut up compiler warning
1044 if(scan->attributes & LOCKBIT)
1047 // block is locked, so try to pile later blocks right after it
1049 start = scan->start + scan->length;
1053 if(scan->attributes & PURGEBITS)
1056 // throw out the purgable block
1059 MM_FreeBlock(scan, mm);
1067 // push the non purgable block on top of the last moved block
1069 if(scan->start != start)
1071 length = scan->length;
1072 source = scan->start;
1074 while(length > 0xf00)
1076 movedata(source,0,dest,0,0xf00*16);
1081 movedata(source,0,dest,0,length*16);
1083 scan->start = start;
1084 *(unsigned *)scan->useptr = start;
1086 start = scan->start + scan->length;
1091 scan = scan->next; // go to next block
1094 mm->mmrover = mm->mmhead;
1099 // VW_ColorBorder (oldborder);
1102 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1106 //==========================================================================
1110 =====================
1114 =====================
1117 void MM_ShowMemory(page_t *page, mminfo_t *mm)
1119 mmblocktype huge *scan;
1123 byte scratch[160],str[16];
1125 //**** VW_SetDefaultColors();
1126 //**** VW_SetLineWidth(40);
1127 //++++mh temp = bufferofs;
1128 //++++mh bufferofs = 0;
1129 //**** VW_SetScreen (0,0);
1142 if(scan->attributes & PURGEBITS)
1143 color = 5; // dark purple = purgable
1145 color = 9; // medium blue = non purgable
1146 if(scan->attributes & LOCKBIT)
1147 color = 12; // red = locked
1148 if(scan->start<=end)
1151 write(debughandle,"\nMM_ShowMemory: Memory block order currupted!\n",strlen("\nMM_ShowMemory: Memory block order currupted!\n"));
1152 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1155 end = scan->start+scan->length-1;
1156 chy = scan->start/320;
1157 chx = scan->start%320;
1158 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1159 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1161 modexClearRegion(page, chx, chy, 4, 4, color);
1164 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1166 //++++ VW_Plot(scan->start,0,15);
1167 modexClearRegion(page, chx, chy, 4, 4, 15);
1168 if(scan->next->start > end+1)
1169 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1170 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1172 chx+=scan->next->start;
1173 modexClearRegion(page, chx, chy, 4, 4, 2);
1175 //modexhlin(page, end+1,scan->next->start, chy, 0);
1178 end = scan->length-1;
1179 y = scan->start/320;
1180 x = scan->start%320;
1181 VW_Hlin(x,x+end,y,color);
1183 if (scan->next && scan->next->start > end+1)
1184 VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1188 printf("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); //bug!
1189 strcpy(scratch,"Seg:");
1190 ultoa (scan->start,str,16);
1191 strcat (scratch,str);
1192 strcat (scratch,"\tSize:");
1193 ltoa ((dword)scan->length*16,str,10);
1194 strcat (scratch,str);
1195 strcat (scratch,"\tOwner:0x");
1196 owner = (unsigned)scan->useptr;
1197 ultoa (owner,str,16);
1198 strcat (scratch,str);
1199 strcat (scratch,"\n");
1200 write(debughandle,scratch,strlen(scratch));
1201 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1203 //fprintf(stdout, "%s", scratch);
1212 //**** VW_SetLineWidth(64);
1213 //++++mh bufferofs = temp;
1217 //==========================================================================
1220 =====================
1224 =====================
1227 void MM_DumpData(mminfo_t *mm)
1229 mmblocktype far *scan,far *best;
1230 long lowest,oldlowest;
1236 free (mm->nearheap);
1237 dumpfile = fopen ("mmdump.txt","w");
1239 printf("MM_DumpData: Couldn't open MMDUMP.TXT!\n");
1252 owner = (word)scan->useptr;
1254 if (owner && owner<lowest && owner > oldlowest)
1263 if (lowest != 0xffff)
1265 if (best->attributes & PURGEBITS)
1269 if (best->attributes & LOCKBIT)
1273 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1274 ,(word)lowest,lock,purge,best->length);
1277 } while (lowest != 0xffff);
1280 printf("MMDUMP.TXT created.\n");
1283 //==========================================================================
1287 ======================
1291 = Returns the total free space without purging
1293 ======================
1296 dword MM_UnusedMemory(mminfo_t *mm)
1299 mmblocktype huge *scan;
1306 free += scan->next->start - (scan->start + scan->length);
1314 //==========================================================================
1318 ======================
1322 = Returns the total free space with purging
1324 ======================
1327 dword MM_TotalFree(mminfo_t *mm)
1330 mmblocktype huge *scan;
1337 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1338 free += scan->length;
1339 free += scan->next->start - (scan->start + scan->length);
1347 //==========================================================================
1350 =====================
1354 =====================
1357 void MM_Report(page_t *page, mminfo_t *mm, mminfotype *mmi)
1359 if(MML_CheckForEMS())
1361 printf("EMM v%x.%x available\n", mm->EMSVer>>4,mm->EMSVer&0x0F);
1362 printf("totalEMSpages=%u\n", mm->totalEMSpages);
1363 printf("freeEMSpages=%u\n", mm->freeEMSpages);
1364 printf("EMSpageframe=%x\n", mm->EMSpageframe);
1366 if(MML_CheckForXMS(mm)) printf("XMSaddr=%Fp\n", *XMSaddr);
1367 printf("near=%lu\n", mmi->nearheap);
1368 printf("far=%lu\n", mmi->farheap);
1369 printf("EMSmem=%lu\n", mmi->EMSmem);
1370 printf("XMSmem=%lu\n", mmi->XMSmem);
1371 printf("mainmem=%lu\n", mmi->mainmem);
1372 printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));
1373 printf("TotalFree=%lu\n", MM_TotalFree(mm));
1375 // printf("UnusedMemory=%lu kb\n", MM_UnusedMemory()/10248);
1376 // printf("TotalFree=%lu kb\n", MM_TotalFree()/10248);
1379 //==========================================================================
1382 =====================
1386 =====================
1389 byte *MM_EMSerr(byte err)
1391 //Returns a text string describing the error code in EMS.Error.
1395 return "successful";
1397 return "internal error";
1399 return "hardware malfunction";
1401 return "busy .. retry later";
1403 return "invalid handle";
1405 return "undefined function requested by application";
1407 return "no more handles available";
1409 return "error in save or restore of mapping context";
1411 return "insufficient memory pages in system";
1413 return "insufficient memory pages available";
1415 return "zero pages requested";
1417 return "invalid logical page number encountered";
1419 return "invalid physical page number encountered";
1421 return "page-mapping hardware state save area is full";
1423 return "save of mapping context failed";
1425 return "restore of mapping context failed";
1427 return "undefined subfunction";
1429 return "undefined attribute type";
1431 return "feature not supported";
1433 return "successful, but a portion of the source region has been overwritten";
1435 return "length of source or destination region exceeds length of region allocated to either source or destination handle";
1437 return "conventional and expanded memory regions overlap";
1439 return "offset within logical page exceeds size of logical page";
1441 return "region length exceeds 1 MB";
1443 return "source and destination EMS regions have same handle and overlap";
1445 return "memory source or destination type undefined";
1447 return "specified alternate map register or DMA register set not supported";
1449 return "all alternate map register or DMA register sets currently allocated";
1451 return "alternate map register or DMA register sets not supported";
1453 return "undefined or unallocated alternate map register or DMA register set";
1455 return "dedicated DMA channels not supported";
1457 return "specified dedicated DMA channel not supported";
1459 return "no such handle name";
1461 return "a handle found had no name, or duplicate handle name";
1463 return "attempted to wrap around 1M conventional address space";
1465 return "source array corrupted";
1467 return "operating system denied access";
1469 return "undefined error";
1473 //==========================================================================
1476 =====================
1480 =====================
1483 void MM_BombOnError(boolean bomb, mminfo_t *mm)
1485 mm->bombonerror = bomb;
1488 void MM_GetNewBlock(mminfo_t *mm)
1492 mm->mmnew=mm->mmfree;
1493 mm->mmfree=mm->mmfree->next;
1494 /*if(!(mm->mmnew=mm->mmfree))
1496 printf("MM_GETNEWBLOCK: No free blocks!");
1499 mm->mmfree=mm->mmfree->next;*/
1502 void MM_FreeBlock(mmblocktype *x, mminfo_t *mm)
1509 void MM_seguin(void)
1520 void MM_segude(void)
1529 pull data from far and put it into ds var