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_ca.h"
57 =============================================================================
61 =============================================================================
64 void (* beforesort) (void);
65 void (* aftersort) (void);
66 void (* XMSaddr) (void); // far pointer to XMS driver
69 =============================================================================
73 =============================================================================
76 static char *ParmStringsexmm[] = {"noems","noxms",""};
79 ======================
83 = Routine from p36 of Extending DOS
85 =======================
88 boolean MML_CheckForEMS(void)
91 static char emmname[] = "EMMXXXX0"; //fix by andrius4669
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
487 mov dx,0xffff // try for largest block possible
488 //mov ax,dx // Set available Kbytes.
489 call [DWORD PTR XMSaddr]
493 cmp bl,0xb0 // error: smaller UMB is available
497 call [DWORD PTR XMSaddr] // DX holds largest available UMB
499 jz done // another error...
516 // printf("base=%u ", base); printf("size=%u\n", size);
517 MML_UseSpace(base,size, mm);
518 mmi->XMSmem += size*16;
519 mm->UMBbase[mm->numUMBs] = base;
521 if(mm->numUMBs < MAXUMBS)
527 ======================
531 ======================
534 void MML_ShutdownXMS(mminfo_t *mm)
539 for (i=0;i<mm->numUMBs;i++)
541 base = mm->UMBbase[i];
545 call [DWORD PTR XMSaddr]
550 //==========================================================================
553 ======================
557 = Marks a range of paragraphs as usable by the memory manager
558 = This is used to mark space for the near heap, far heap, ems page frame,
559 = and upper memory blocks
561 ======================
564 /*void MML_UseSpace(word segstart, dword seglength, mminfo_t *mm)
566 mmblocktype huge *scan,huge *last;
572 scan = last = mm->mmhead;
573 mm->mmrover = mm->mmhead; // reset rover to start of memory
576 // search for the block that contains the range of segments
578 while(scan->start+scan->length < segstart)
585 // take the given range out of the block
587 oldend = scan->start + scan->length;
588 extra = oldend - (segstart+seglength);
593 if(segm>1)/// || extra>=0x10000lu)
598 //MML_UseSpace(segstart, seglength, mm);
600 printf("MML_UseSpace: Segment spans two blocks!\n");
602 printf("segm=%u ", segm);
603 printf("ex=%lu ", extra);
604 printf("old=%u ", oldend);
605 printf("start+seglen=%lu\n", segstart+seglength);
606 printf("segsta=%x ", segstart);
607 printf("len=%lu ", scan->length);
608 printf("seglen=%lu ", seglength);
609 printf("segmlen=%lu\n", segmlen);
611 //++++todo: linked list of segment!
612 if(segstart == scan->start)
614 last->next = scan->next; // unlink block
619 scan->length = segstart-scan->start; // shorten block
624 mm->mmnew->useptr = NULL;
626 mm->mmnew->next = scan->next;
627 scan->next = mm->mmnew;
628 mm->mmnew->start = segstart+seglength;
629 mm->mmnew->length = extra;
630 mm->mmnew->attributes = LOCKBIT;
631 }//else if(segm>0) goto segu;
634 void MML_UseSpace(word segstart, dword seglength, mminfo_t *mm)
636 mmblocktype far *scan,far *last;
641 scan = last = mm->mmhead;
642 mm->mmrover = mm->mmhead; // reset rover to start of memory
645 // search for the block that contains the range of segments
647 while (scan->start+scan->length < segstart)
654 // find out how many blocks it spans!
656 /*for(;seglength>=0x10000;seglength-=0xFFFF)
658 //printf(" seglen=%lu\n", segmlen);
663 // take the given range out of the block
665 oldend = scan->start + scan->length;
666 extra = oldend - (segstart+((unsigned)seglength));
669 printf("========================================\n");
670 printf("start=%x ", scan->start);
671 printf("old=%u ", oldend);
672 printf("start+seglen=%lu\n", segstart+seglength);
673 printf("segsta=%x ", segstart);
674 printf("len=%lu ", scan->length);
675 printf("seglen=%lu ", seglength);
677 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
678 printf("========================================\n");
682 if (segstart == scan->start)
684 last->next = scan->next; // unlink block
689 scan->length = segstart-scan->start; // shorten block
694 mm->mmnew->useptr = NULL;
696 mm->mmnew->next = scan->next;
697 scan->next = mm->mmnew;
698 mm->mmnew->start = segstart+seglength;
699 mm->mmnew->length = extra;
700 mm->mmnew->attributes = LOCKBIT;
705 //==========================================================================
712 = We are out of blocks, so free a purgable block
717 void MML_ClearBlock(mminfo_t *mm)
719 mmblocktype huge *scan,huge *last;
721 scan = mm->mmhead->next;
725 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
727 MM_FreePtr(scan->useptr, mm);
733 printf("MM_ClearBlock: No purgable blocks!\n");
737 //==========================================================================
744 = Grabs all space from turbo with malloc/farmalloc
745 = Allocates bufferseg misc buffer
750 void MM_Startup(mminfo_t *mm, mminfotype *mmi)
753 dword length,seglength;
754 //dword length; word seglength;
756 word segstart;//,endfree;
762 mm->mmstarted = true;
763 mm->bombonerror = true;
766 // set up the linked list (everything in the free list;
769 mm->mmfree = &(mm->mmblocks[0]);
770 for(i=0;i<MAXBLOCKS-1;i++)
772 mm->mmblocks[i].next = &(mm->mmblocks[i+1]);
774 mm->mmblocks[i].next = NULL;
777 // locked block of all memory until we punch out free space
780 mm->mmhead = mm->mmnew; // this will allways be the first node
781 mm->mmnew->start = 0;
782 mm->mmnew->length = 0xffff;
783 mm->mmnew->attributes = LOCKBIT;
784 mm->mmnew->next = NULL;
785 //mm->mmnew->useptr = peeonself;
786 mm->mmrover = mm->mmhead;
788 //printf(" %x\n", peeonself);
789 //printf(" %x\n", *peeonself);
791 // get all available near conventional memory segments
795 length=(dword)_memavl();//(dword)GetFreeSize();
796 start = (void huge *)(mm->nearheap = _nmalloc(length));
800 start = (void huge *)(mm->nearheap = malloc(length));
802 length -= 16-(FP_OFF(start)&15);
803 length -= SAVENEARHEAP;
804 seglength = length / 16; // now in paragraphs
805 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
806 MML_UseSpace(segstart,seglength, mm);
807 mmi->nearheap = length;
808 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
811 // get all available far conventional memory segments
813 //printf("_FARCORELEFT %lu\n", _FCORELEFT);
818 printf("farcoreleft() %lu\n", farcoreleft());
819 printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
821 length=_FCORELEFT;//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
822 start = mm->farheap = _fmalloc(length);
823 //start = mm->farheap = halloc(length, 1);
824 length -= 16-(FP_OFF(start)&15);
825 length -= SAVEFARHEAP;
826 seglength = length / 16; // now in paragraphs
827 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
828 MML_UseSpace(segstart,seglength, mm);
829 mmi->farheap = length;
830 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
832 mmi->mainmem = mmi->nearheap + mmi->farheap;
835 // detect EMS and allocate up to 64K at page frame
838 //goto emsskip; //0000
855 ,ParmStringsexmm) == 0)
856 goto emsskip; // param NOEMS
858 if(MML_CheckForEMS())
860 MML_SetupEMS(mm); // allocate space
861 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
862 MML_UseSpace(mm->EMSpageframe,(MAPPAGES)*0x4000lu, mm);
863 //if(mm->EMSVer<0x40)
864 MM_MapEMS(mm, mmi); // map in used pages
866 //MM_MapXEMS(mm, mmi); // map in used pages
870 // detect XMS and get upper memory blocks
891 ,ParmStringsexmm) == 0)
892 goto xmsskip; // param NOXMS
894 if(MML_CheckForXMS(mm))
896 MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible
900 // allocate the misc buffer
903 mm->mmrover = mm->mmhead; // start looking for space after low block
905 MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);
908 //==========================================================================
915 = Frees all conventional, EMS, and XMS allocated
920 void MM_Shutdown(mminfo_t *mm)
925 _ffree(mm->farheap);// printf(" far freed\n");
927 _nfree(mm->nearheap);// printf(" near freed\n");
930 free(mm->nearheap);// printf(" near freed\n");
932 if(MML_CheckForEMS()){ MML_ShutdownEMS(mm); }//printf(" EMS freed\n"); }
933 if(MML_CheckForXMS(mm)){ MML_ShutdownXMS(mm); }//printf(" XMS freed\n"); }
936 //==========================================================================
943 = Allocates an unlocked, unpurgable block
948 void MM_GetPtr (memptr *baseptr, dword size, mminfo_t *mm, mminfotype *mmi)
950 mmblocktype huge *scan,huge *lastscan,huge *endscan
951 ,huge *purge,huge *next;
953 unsigned needed,startseg;
955 needed = (size+15)/16; // convert size from bytes to paragraphs
957 GETNEWBLOCK; // fill in start and next after a spot is found
958 mm->mmnew->length = needed;
959 mm->mmnew->useptr = baseptr;
960 //if(mm->mmnew->useptr==NULL){
961 printf("baseptr=%04x ", baseptr); printf("useptr=%04x\n", mm->mmnew->useptr);
962 printf("*baseptr=%04x ", *baseptr); printf("*useptr=%04x\n", *(mm->mmnew->useptr));
963 //printf("*baseptr=%Fp ", *baseptr); printf("*useptr=%Fp\n", *(mm->mmnew->useptr));
965 mm->mmnew->attributes = BASEATTRIBUTES;
968 for (search = 0; search<3; search++)
971 // first search: try to allocate right after the rover, then on up
972 // second search: search from the head pointer up to the rover
973 // third search: compress memory, then scan from start
974 if (search == 1 && mm->mmrover == mm->mmhead)
980 lastscan = mm->mmrover;
981 scan = mm->mmrover->next;
985 lastscan = mm->mmhead;
986 scan = mm->mmhead->next;
987 endscan = mm->mmrover;
991 lastscan = mm->mmhead;
992 scan = mm->mmhead->next;
997 startseg = lastscan->start + lastscan->length;
999 while (scan != endscan)
1001 if (scan->start - startseg >= needed)
1004 // got enough space between the end of lastscan and
1005 // the start of scan, so throw out anything in the middle
1006 // and allocate the new block
1008 purge = lastscan->next;
1009 lastscan->next = mm->mmnew;
1010 mm->mmnew->start = *(unsigned *)baseptr = startseg;
1011 mm->mmnew->next = scan;
1012 while ( purge != scan)
1013 { // free the purgable block
1016 purge = next; // purge another if not at scan
1018 mm->mmrover = mm->mmnew;
1019 return; // good allocation!
1023 // if this block is purge level zero or locked, skip past it
1025 if ( (scan->attributes & LOCKBIT)
1026 || !(scan->attributes & PURGEBITS) )
1029 startseg = lastscan->start + lastscan->length;
1033 scan=scan->next; // look at next line
1037 if (mm->bombonerror)
1042 printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));
1043 printf("for stability reasons the program will shut down! wwww\n");
1051 //==========================================================================
1054 ====================
1058 = Allocates an unlocked, unpurgable block
1060 ====================
1063 void MM_FreePtr(memptr *baseptr, mminfo_t *mm)
1065 mmblocktype huge *scan,huge *last;
1070 if(baseptr == mm->mmrover->useptr) // removed the last allocated block
1071 mm->mmrover = mm->mmhead;
1073 while(scan->useptr != baseptr && scan)
1081 printf("MM_FreePtr: Block not found!\n");
1085 last->next = scan->next;
1089 //==========================================================================
1092 =====================
1096 = Sets the purge level for a block (locked blocks cannot be made purgable)
1098 =====================
1101 void MM_SetPurge(memptr *baseptr, int purge, mminfo_t *mm)
1103 mmblocktype huge *start;
1105 start = mm->mmrover;
1109 if(mm->mmrover->useptr == baseptr)
1112 mm->mmrover = mm->mmrover->next;
1115 mm->mmrover = mm->mmhead;
1116 else if(mm->mmrover == start)
1118 printf("MM_SetPurge: Block not found!");
1124 mm->mmrover->attributes &= ~PURGEBITS;
1125 mm->mmrover->attributes |= purge;
1128 //==========================================================================
1131 =====================
1135 = Locks / unlocks the block
1137 =====================
1140 void MM_SetLock(memptr *baseptr, boolean locked, mminfo_t *mm)
1142 mmblocktype huge *start;
1144 start = mm->mmrover;
1148 if(mm->mmrover->useptr == baseptr)
1151 mm->mmrover = mm->mmrover->next;
1154 mm->mmrover = mm->mmhead;
1155 else if(mm->mmrover == start)
1157 printf("MM_SetLock: Block not found!");
1163 mm->mmrover->attributes &= ~LOCKBIT;
1164 mm->mmrover->attributes |= locked*LOCKBIT;
1167 //==========================================================================
1170 =====================
1174 = Throws out all purgable stuff and compresses movable blocks
1176 =====================
1179 void MM_SortMem(mminfo_t *mm)
1181 mmblocktype huge *scan,huge *last,huge *next;
1182 unsigned start,length,source,dest,oldborder;
1186 // lock down a currently playing sound
1188 /*++++ playing = SD_SoundPlaying ();
1194 playing += STARTPCSOUNDS;
1197 playing += STARTADLIBSOUNDS;
1200 MM_SetLock(&(memptr)audiosegs[playing],true);
1205 // oldborder = bordercolor;
1206 // VW_ColorBorder (15);
1213 last = NULL; // shut up compiler warning
1217 if(scan->attributes & LOCKBIT)
1220 // block is locked, so try to pile later blocks right after it
1222 start = scan->start + scan->length;
1226 if(scan->attributes & PURGEBITS)
1229 // throw out the purgable block
1233 //MM_FreeBlock(scan, mm);
1241 // push the non purgable block on top of the last moved block
1243 if(scan->start != start)
1245 length = scan->length;
1246 source = scan->start;
1248 while(length > 0xf00)
1250 movedata(source,0,dest,0,0xf00*16);
1255 movedata(source,0,dest,0,length*16);
1257 scan->start = start;
1258 *(unsigned *)scan->useptr = start;
1260 start = scan->start + scan->length;
1265 scan = scan->next; // go to next block
1268 mm->mmrover = mm->mmhead;
1273 // VW_ColorBorder (oldborder);
1276 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1279 //==========================================================================
1282 =====================
1286 =====================
1289 void MM_ShowMemory(global_game_variables_t *gvar,/*page_t *page, */mminfo_t *mm)
1291 mmblocktype huge *scan;
1297 byte scratch[160],scratch0[4096],scratch1[160],str[16];
1299 //**** VW_SetDefaultColors();
1300 //**** VW_SetLineWidth(40);
1301 //++++mh temp = bufferofs;
1302 //++++mh bufferofs = 0;
1303 //**** VW_SetScreen (0,0);
1307 CA_OpenDebug (gvar);
1311 strcpy(scratch, AARESET);
1312 if(scan->attributes & PURGEBITS)
1313 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
1315 strcpy(scratch0, AABLUE); // medium blue = non purgable
1316 if(scan->attributes & LOCKBIT)
1317 strcpy(scratch0, AARED); // red = locked
1318 if(scan->start<=end)
1320 printf("\nend==%d\n\n", end);
1321 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1322 strcat(scratch, "End's Size: ");
1324 strcat (scratch,str);
1325 strcat(scratch, "\nscan->start's Size: ");
1326 ultoa (scan->start,str,10);
1327 strcat (scratch,str);
1328 write(gvar->handle.debughandle,scratch,strlen(scratch));
1329 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1332 end = scan->start+(scan->length)-1;
1333 //++++ chy = scan->start/320;
1334 //++++ chx = scan->start%320;
1335 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1336 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1338 //++++ modexClearRegion(page, chx, chy, 4, 4, color);
1340 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1341 for(w=(scan->start)/80;w<=end/80;w++)
1343 //printf("+ %u %lu\n", w, scan->length);
1344 strcat(scratch0, "+");
1346 strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1347 //++++ VW_Plot(scan->start,0,15);
1348 //++++ modexClearRegion(page, chx, chy, 4, 4, 15);
1349 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1351 //wwww=(dword)(scan->next->start)-(dword)scan->start;
1352 //wwww=(dword)scan->start+(dword)(scan->next->start);
1353 if (scan->next && scan->next->start >= end+1)
1355 strcat(scratch0, AARESET);
1356 strcat(scratch0, "\n");
1357 strcat(scratch0,AAGREEN);
1358 for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
1359 //for(w=(wwww)/80;w<=((end+1)/80);w++)
1360 //for(w=(end+1)/80;w<=((wwww)/80);w++)
1362 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
1363 strcat(scratch0,"0");
1365 //printf("==================\n");
1366 //printf("w=%u wwww=%lu start=%04x next=%04x end=%lu\n", w/80, wwww/80, scan->start, (scan->next->start), end+1);
1367 //printf("==================\n");
1368 strcat(scratch0, "\n");
1370 }/*else {//if(scan->next->start <= scan->start){
1371 scan->next->start=scan->start+0x1000;
1372 wwww=(dword)(scan->next->start)-(dword)scan->start;
1373 strcat(scratch0, AARESET);
1374 strcat(scratch0, "\n");
1375 strcat(scratch0,AAGREEN);
1376 for(w=(end+1);w<=(0x1000/80);w++)
1378 //printf("0 %x %x %u\n", scan->start, w);
1379 strcat(scratch0,"0");
1381 printf("================\n");
1382 printf("w=%x start=%x next=%x end=%u %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1383 printf("================\n");
1386 strcat(scratch0, AARESET);
1387 //strcat(scratch0,"\n");
1388 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1390 // chx+=scan->next->start;
1391 // modexClearRegion(page, chx, chy, 4, 4, 2);
1393 //modexhlin(page, end+1,scan->next->start, chy, 0);
1394 /* y = scan->start/320;
1395 x = scan->start%320;
1396 VW_Hlin(x,x+end,y,color);
1398 //++++ VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1399 strcat(scratch,"Seg:");
1400 ultoa (scan->start,str,16);
1401 strcat (scratch,str);
1402 strcat (scratch,"\tSize:");
1403 ultoa ((unsigned)scan->length,str,10);
1404 strcat (scratch,str);
1405 strcat (scratch,"\tOwner:0x");
1406 owner = (unsigned)scan->useptr;
1407 ultoa (owner,str,16);
1408 strcat (scratch,str);
1409 strcat (scratch,"\n");
1410 write(gvar->handle.debughandle,scratch,strlen(scratch));
1411 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1412 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1414 //fprintf(stdout, "%s", scratch);
1418 /*strcpy(scratch1, AARESET);
1419 strcat(scratch1, "========================================\n");
1420 strcat(scratch1, "near= ");
1421 ultoa (*(mm->nearheap),str,10);
1422 strcat (scratch1,str);
1423 strcat(scratch1, " far= ");
1424 ultoa (*(mm->farheap),str,10);
1425 strcat (scratch1,str);
1426 strcat(scratch1, "\n");
1427 //strcat(scratch1, "&near= %Fp ", &(mm->nearheap));
1428 //strcat(scratch1, "&far= %Fp", &(mm->farheap));
1429 //strcat(scratch1, "\n");
1430 strcat(scratch1, "========================================\n");
1431 write(gvar->handle.debughandle,scratch1,strlen(scratch1));*/
1434 CA_CloseDebug (gvar);
1437 //**** VW_SetLineWidth(64);
1438 //++++mh bufferofs = temp;
1441 //==========================================================================
1444 =====================
1448 =====================
1451 void MM_DumpData(mminfo_t *mm)
1453 mmblocktype huge *scan,huge *best;
1454 long lowest,oldlowest;
1460 dumpfile = fopen ("mmdump.16","w");
1462 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1475 owner = (unsigned)scan->useptr;
1477 if (owner && owner<lowest && owner > oldlowest)
1486 if (lowest != 0xffff)
1488 if (best->attributes & PURGEBITS)
1492 if (best->attributes & LOCKBIT)
1496 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1497 ,(unsigned)lowest,lock,purge,best->length);
1500 } while (lowest != 0xffff);
1503 printf("MMDUMP.16 created.\n");
1506 //==========================================================================
1510 ======================
1514 = Returns the total free space without purging
1516 ======================
1519 dword MM_UnusedMemory(mminfo_t *mm)
1522 mmblocktype huge *scan;
1529 free += scan->next->start - (scan->start + scan->length);
1537 //==========================================================================
1541 ======================
1545 = Returns the total free space with purging
1547 ======================
1550 dword MM_TotalFree(mminfo_t *mm)
1553 mmblocktype huge *scan;
1560 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1561 free += scan->length;
1562 free += scan->next->start - (scan->start + scan->length);
1570 //==========================================================================
1573 =====================
1577 =====================
1580 void MM_Report(/*page_t *page, */mminfo_t *mm, mminfotype *mmi)
1582 if(MML_CheckForEMS())
1584 printf("EMM v%x.%x available\n", mm->EMSVer>>4,mm->EMSVer&0x0F);
1585 printf("totalEMSpages=%u\n", mm->totalEMSpages);
1586 printf("freeEMSpages=%u\n", mm->freeEMSpages);
1587 printf("EMSpageframe=%x\n", mm->EMSpageframe);
1589 if(MML_CheckForXMS(mm)) printf("XMSaddr=%X\n", *XMSaddr);
1590 printf("near=%lu\n", mmi->nearheap);
1591 printf("far=%lu\n", mmi->farheap);
1592 printf("EMSmem=%lu\n", mmi->EMSmem);
1593 printf("XMSmem=%lu\n", mmi->XMSmem);
1594 printf("mainmem=%lu\n", mmi->mainmem);
1595 printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));
1596 printf("TotalFree=%lu\n", MM_TotalFree(mm));
1597 printf("TotalUsed=%lu\n", mmi->mainmem+mmi->EMSmem+mmi->XMSmem+mmi->XMSmem);
1600 //==========================================================================
1603 =====================
1607 =====================
1610 void MM_EMSerr(byte *stri, byte err)
1612 //Returns a text string describing the error code in EMS.Error.
1616 strcat(stri, "successful");
1619 strcat(stri, "internal error");
1622 strcat(stri, "hardware malfunction");
1625 strcat(stri, "busy .. retry later");
1628 strcat(stri, "invalid handle");
1631 strcat(stri, "undefined function requested by application");
1634 strcat(stri, "no more handles available");
1637 strcat(stri, "error in save or restore of mapping context");
1640 strcat(stri, "insufficient memory pages in system");
1643 strcat(stri, "insufficient memory pages available");
1646 strcat(stri, "zero pages requested");
1649 strcat(stri, "invalid logical page number encountered");
1652 strcat(stri, "invalid physical page number encountered");
1655 strcat(stri, "page-mapping hardware state save area is full");
1658 strcat(stri, "save of mapping context failed");
1661 strcat(stri, "restore of mapping context failed");
1664 strcat(stri, "undefined subfunction");
1667 strcat(stri, "undefined attribute type");
1670 strcat(stri, "feature not supported");
1673 strcat(stri, "successful, but a portion of the source region has been overwritten");
1676 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1679 strcat(stri, "conventional and expanded memory regions overlap");
1682 strcat(stri, "offset within logical page exceeds size of logical page");
1685 strcat(stri, "region length exceeds 1 MB");
1688 strcat(stri, "source and destination EMS regions have same handle and overlap");
1691 strcat(stri, "memory source or destination type undefined");
1694 strcat(stri, "specified alternate map register or DMA register set not supported");
1697 strcat(stri, "all alternate map register or DMA register sets currently allocated");
1700 strcat(stri, "alternate map register or DMA register sets not supported");
1703 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1706 strcat(stri, "dedicated DMA channels not supported");
1709 strcat(stri, "specified dedicated DMA channel not supported");
1712 strcat(stri, "no such handle name");
1715 strcat(stri, "a handle found had no name, or duplicate handle name");
1718 strcat(stri, "attempted to wrap around 1M conventional address space");
1721 strcat(stri, "source array corrupted");
1724 strcat(stri, "operating system denied access");
1727 strcat(stri, "undefined error");
1731 //==========================================================================
1734 =====================
1738 =====================
1741 void MM_BombOnError(boolean bomb, mminfo_t *mm)
1743 mm->bombonerror = bomb;
1746 /*void MM_GetNewBlock(mminfo_t *mm)
1750 mm->mmnew=mm->mmfree;
1751 mm->mmfree=mm->mmfree->next;
1752 if(!(mm->mmnew=mm->mmfree))
1754 printf("MM_GETNEWBLOCK: No free blocks!\n");
1757 mm->mmfree=mm->mmfree->next;
1760 void MM_FreeBlock(mmblocktype *x, mminfo_t *mm)
1767 /*void MM_seguin(void)
1777 void MM_segude(void)
1785 pull data from far and put it into ds var