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+((word)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;
761 mm->mmstarted = true;
762 mm->bombonerror = true;
765 // set up the linked list (everything in the free list;
768 mm->mmfree = &(mm->mmblocks[0]);
769 for(i=0;i<MAXBLOCKS-1;i++)
771 mm->mmblocks[i].next = &(mm->mmblocks[i+1]);
773 mm->mmblocks[i].next = NULL;
776 // locked block of all memory until we punch out free space
779 mm->mmhead = mm->mmnew; // this will allways be the first node
780 mm->mmnew->start = 0;
781 mm->mmnew->length = 0xffff;
782 mm->mmnew->attributes = LOCKBIT;
783 mm->mmnew->next = NULL;
784 mm->mmrover = mm->mmhead;
787 // get all available near conventional memory segments
791 length=(dword)_memavl();//(dword)GetFreeSize();
792 start = (void huge *)(mm->nearheap = _nmalloc(length));
796 start = (void huge *)(mm->nearheap = malloc(length));
798 length -= 16-(FP_OFF(start)&15);
799 length -= SAVENEARHEAP;
800 seglength = length / 16; // now in paragraphs
801 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
802 MML_UseSpace(segstart,seglength, mm);
803 mmi->nearheap = length;
804 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
807 // get all available far conventional memory segments
809 //printf("_FARCORELEFT %lu\n", _FCORELEFT);
814 printf("farcoreleft() %lu\n", farcoreleft());
815 printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
817 length=_FCORELEFT;//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
818 start = mm->farheap = _fmalloc(length);
819 //start = 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, mm);
825 mmi->farheap = length;
826 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
828 mmi->mainmem = mmi->nearheap + mmi->farheap;
831 // detect EMS and allocate up to 64K at page frame
834 //goto emsskip; //0000
851 ,ParmStringsexmm) == 0)
852 goto emsskip; // param NOEMS
854 if(MML_CheckForEMS())
856 MML_SetupEMS(mm); // allocate space
857 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
858 MML_UseSpace(mm->EMSpageframe,(MAPPAGES)*0x4000lu, mm);
859 //if(mm->EMSVer<0x40)
860 MM_MapEMS(mm, mmi); // map in used pages
862 //MM_MapXEMS(mm, mmi); // map in used pages
866 // detect XMS and get upper memory blocks
887 ,ParmStringsexmm) == 0)
888 goto xmsskip; // param NOXMS
890 if(MML_CheckForXMS(mm))
892 MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible
896 // allocate the misc buffer
899 mm->mmrover = mm->mmhead; // start looking for space after low block
901 MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);
904 //==========================================================================
911 = Frees all conventional, EMS, and XMS allocated
916 void MM_Shutdown(mminfo_t *mm)
921 _ffree(mm->farheap);// printf(" far freed\n");
923 _nfree(mm->nearheap);// printf(" near freed\n");
926 free(mm->nearheap);// printf(" near freed\n");
928 if(MML_CheckForEMS()){ MML_ShutdownEMS(mm); }//printf(" EMS freed\n"); }
929 if(MML_CheckForXMS(mm)){ MML_ShutdownXMS(mm); }//printf(" XMS freed\n"); }
932 //==========================================================================
939 = Allocates an unlocked, unpurgable block
944 void MM_GetPtr (memptr *baseptr, dword size, mminfo_t *mm, mminfotype *mmi)
946 mmblocktype huge *scan,huge *lastscan,huge *endscan
947 ,huge *purge,huge *next;
949 unsigned needed,startseg;
951 needed = (size+15)/16; // convert size from bytes to paragraphs
953 GETNEWBLOCK; // fill in start and next after a spot is found
954 mm->mmnew->length = needed;
955 mm->mmnew->useptr = baseptr;
956 mm->mmnew->attributes = BASEATTRIBUTES;
959 for (search = 0; search<3; search++)
962 // first search: try to allocate right after the rover, then on up
963 // second search: search from the head pointer up to the rover
964 // third search: compress memory, then scan from start
965 if (search == 1 && mm->mmrover == mm->mmhead)
971 lastscan = mm->mmrover;
972 scan = mm->mmrover->next;
976 lastscan = mm->mmhead;
977 scan = mm->mmhead->next;
978 endscan = mm->mmrover;
982 lastscan = mm->mmhead;
983 scan = mm->mmhead->next;
988 startseg = lastscan->start + lastscan->length;
990 while (scan != endscan)
992 if (scan->start - startseg >= needed)
995 // got enough space between the end of lastscan and
996 // the start of scan, so throw out anything in the middle
997 // and allocate the new block
999 purge = lastscan->next;
1000 lastscan->next = mm->mmnew;
1001 mm->mmnew->start = *(unsigned *)baseptr = startseg;
1002 mm->mmnew->next = scan;
1003 while ( purge != scan)
1004 { // free the purgable block
1007 purge = next; // purge another if not at scan
1009 mm->mmrover = mm->mmnew;
1010 return; // good allocation!
1014 // if this block is purge level zero or locked, skip past it
1016 if ( (scan->attributes & LOCKBIT)
1017 || !(scan->attributes & PURGEBITS) )
1020 startseg = lastscan->start + lastscan->length;
1024 scan=scan->next; // look at next line
1028 if (mm->bombonerror)
1033 printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));
1034 printf("for stability reasons the program will shut down! wwww\n");
1042 //==========================================================================
1045 ====================
1049 = Allocates an unlocked, unpurgable block
1051 ====================
1054 void MM_FreePtr(memptr *baseptr, mminfo_t *mm)
1056 mmblocktype huge *scan,huge *last;
1061 if(baseptr == mm->mmrover->useptr) // removed the last allocated block
1062 mm->mmrover = mm->mmhead;
1064 while(scan->useptr != baseptr && scan)
1072 printf("MM_FreePtr: Block not found!\n");
1076 last->next = scan->next;
1080 //==========================================================================
1083 =====================
1087 = Sets the purge level for a block (locked blocks cannot be made purgable)
1089 =====================
1092 void MM_SetPurge(memptr *baseptr, int purge, mminfo_t *mm)
1094 mmblocktype huge *start;
1096 start = mm->mmrover;
1100 if(mm->mmrover->useptr == baseptr)
1103 mm->mmrover = mm->mmrover->next;
1106 mm->mmrover = mm->mmhead;
1107 else if(mm->mmrover == start)
1109 printf("MM_SetPurge: Block not found!");
1115 mm->mmrover->attributes &= ~PURGEBITS;
1116 mm->mmrover->attributes |= purge;
1119 //==========================================================================
1122 =====================
1126 = Locks / unlocks the block
1128 =====================
1131 void MM_SetLock(memptr *baseptr, boolean locked, mminfo_t *mm)
1133 mmblocktype huge *start;
1135 start = mm->mmrover;
1139 if(mm->mmrover->useptr == baseptr)
1142 mm->mmrover = mm->mmrover->next;
1145 mm->mmrover = mm->mmhead;
1146 else if(mm->mmrover == start)
1148 printf("MM_SetLock: Block not found!");
1154 mm->mmrover->attributes &= ~LOCKBIT;
1155 mm->mmrover->attributes |= locked*LOCKBIT;
1158 //==========================================================================
1161 =====================
1165 = Throws out all purgable stuff and compresses movable blocks
1167 =====================
1170 void MM_SortMem(mminfo_t *mm)
1172 mmblocktype huge *scan,huge *last,huge *next;
1173 unsigned start,length,source,dest,oldborder;
1177 // lock down a currently playing sound
1179 /*++++ playing = SD_SoundPlaying ();
1185 playing += STARTPCSOUNDS;
1188 playing += STARTADLIBSOUNDS;
1191 MM_SetLock(&(memptr)audiosegs[playing],true);
1196 // oldborder = bordercolor;
1197 // VW_ColorBorder (15);
1204 last = NULL; // shut up compiler warning
1208 if(scan->attributes & LOCKBIT)
1211 // block is locked, so try to pile later blocks right after it
1213 start = scan->start + scan->length;
1217 if(scan->attributes & PURGEBITS)
1220 // throw out the purgable block
1224 //MM_FreeBlock(scan, mm);
1232 // push the non purgable block on top of the last moved block
1234 if(scan->start != start)
1236 length = scan->length;
1237 source = scan->start;
1239 while(length > 0xf00)
1241 movedata(source,0,dest,0,0xf00*16);
1246 movedata(source,0,dest,0,length*16);
1248 scan->start = start;
1249 *(unsigned *)scan->useptr = start;
1251 start = scan->start + scan->length;
1256 scan = scan->next; // go to next block
1259 mm->mmrover = mm->mmhead;
1264 // VW_ColorBorder (oldborder);
1267 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1270 //==========================================================================
1273 =====================
1277 =====================
1280 void MM_ShowMemory(global_game_variables_t *gvar,/*page_t *page, */mminfo_t *mm)
1282 mmblocktype huge *scan;
1288 byte scratch[160],scratch0[4096],str[16];
1290 //**** VW_SetDefaultColors();
1291 //**** VW_SetLineWidth(40);
1292 //++++mh temp = bufferofs;
1293 //++++mh bufferofs = 0;
1294 //**** VW_SetScreen (0,0);
1298 CA_OpenDebug (gvar);
1302 strcpy(scratch, AARESET);
1303 if(scan->attributes & PURGEBITS)
1304 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
1306 strcpy(scratch0, AABLUE); // medium blue = non purgable
1307 if(scan->attributes & LOCKBIT)
1308 strcpy(scratch0, AARED); // red = locked
1309 if(scan->start<=end)
1311 printf("\nend==%d\n\n", end);
1312 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1313 strcat(scratch, "End's Size: ");
1315 strcat (scratch,str);
1316 strcat(scratch, "\nscan->start's Size: ");
1317 ultoa (scan->start,str,10);
1318 strcat (scratch,str);
1319 write(gvar->handle.debughandle,scratch,strlen(scratch));
1320 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1323 end = scan->start+(scan->length)-1;
1324 //++++ chy = scan->start/320;
1325 //++++ chx = scan->start%320;
1326 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1327 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1329 //++++ modexClearRegion(page, chx, chy, 4, 4, color);
1331 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1332 for(w=(scan->start)/80;w<=end/80;w++)
1334 //printf("+ %u %lu\n", w, scan->length);
1335 strcat(scratch0, "+");
1337 strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1338 //++++ VW_Plot(scan->start,0,15);
1339 //++++ modexClearRegion(page, chx, chy, 4, 4, 15);
1340 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1342 wwww=(dword)(scan->next->start)-(dword)scan->start;
1343 //wwww=(dword)scan->start+(dword)(scan->next->start);
1344 if (scan->next && scan->next->start >= end+1)
1346 strcat(scratch0, AARESET);
1347 strcat(scratch0, "\n");
1348 strcat(scratch0,AAGREEN);
1349 for(w=(end+1)/80;w<=(wwww/80);w++)
1351 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
1352 strcat(scratch0,"0");
1354 printf("==================\n");
1355 printf("w=%x start=%x next=%x end=%u %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1356 printf("==================\n");
1357 strcat(scratch0, "\n");
1358 }/*else {//if(scan->next->start <= scan->start){
1359 scan->next->start=scan->start+0x1000;
1360 wwww=(dword)(scan->next->start)-(dword)scan->start;
1361 strcat(scratch0, AARESET);
1362 strcat(scratch0, "\n");
1363 strcat(scratch0,AAGREEN);
1364 for(w=(end+1);w<=(0x1000/80);w++)
1366 //printf("0 %x %x %u\n", scan->start, w);
1367 strcat(scratch0,"0");
1369 printf("================\n");
1370 printf("w=%x start=%x next=%x end=%u %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1371 printf("================\n");
1374 strcat(scratch0, AARESET);
1375 //strcat(scratch0,"\n");
1376 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1378 // chx+=scan->next->start;
1379 // modexClearRegion(page, chx, chy, 4, 4, 2);
1381 //modexhlin(page, end+1,scan->next->start, chy, 0);
1382 /* y = scan->start/320;
1383 x = scan->start%320;
1384 VW_Hlin(x,x+end,y,color);
1386 //++++ VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1387 strcat(scratch,"Seg:");
1388 ultoa (scan->start,str,16);
1389 strcat (scratch,str);
1390 strcat (scratch,"\tSize:");
1391 ultoa ((word)scan->length,str,10);
1392 strcat (scratch,str);
1393 strcat (scratch,"\tOwner:0x");
1394 owner = (unsigned)scan->useptr;
1395 ultoa (owner,str,16);
1396 strcat (scratch,str);
1397 strcat (scratch,"\n");
1398 write(gvar->handle.debughandle,scratch,strlen(scratch));
1399 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1400 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1402 //fprintf(stdout, "%s", scratch);
1407 CA_CloseDebug (gvar);
1410 //**** VW_SetLineWidth(64);
1411 //++++mh bufferofs = temp;
1414 //==========================================================================
1417 =====================
1421 =====================
1424 void MM_DumpData(mminfo_t *mm)
1426 mmblocktype huge *scan,huge *best;
1427 long lowest,oldlowest;
1433 dumpfile = fopen ("mmdump.16","w");
1435 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1448 owner = (word)scan->useptr;
1450 if (owner && owner<lowest && owner > oldlowest)
1459 if (lowest != 0xffff)
1461 if (best->attributes & PURGEBITS)
1465 if (best->attributes & LOCKBIT)
1469 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1470 ,(word)lowest,lock,purge,best->length);
1473 } while (lowest != 0xffff);
1476 printf("MMDUMP.16 created.\n");
1479 //==========================================================================
1483 ======================
1487 = Returns the total free space without purging
1489 ======================
1492 dword MM_UnusedMemory(mminfo_t *mm)
1495 mmblocktype huge *scan;
1502 free += scan->next->start - (scan->start + scan->length);
1510 //==========================================================================
1514 ======================
1518 = Returns the total free space with purging
1520 ======================
1523 dword MM_TotalFree(mminfo_t *mm)
1526 mmblocktype huge *scan;
1533 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1534 free += scan->length;
1535 free += scan->next->start - (scan->start + scan->length);
1543 //==========================================================================
1546 =====================
1550 =====================
1553 void MM_Report(/*page_t *page, */mminfo_t *mm, mminfotype *mmi)
1555 if(MML_CheckForEMS())
1557 printf("EMM v%x.%x available\n", mm->EMSVer>>4,mm->EMSVer&0x0F);
1558 printf("totalEMSpages=%u\n", mm->totalEMSpages);
1559 printf("freeEMSpages=%u\n", mm->freeEMSpages);
1560 printf("EMSpageframe=%x\n", mm->EMSpageframe);
1562 if(MML_CheckForXMS(mm)) printf("XMSaddr=%X\n", *XMSaddr);
1563 printf("near=%lu\n", mmi->nearheap);
1564 printf("far=%lu\n", mmi->farheap);
1565 printf("EMSmem=%lu\n", mmi->EMSmem);
1566 printf("XMSmem=%lu\n", mmi->XMSmem);
1567 printf("mainmem=%lu\n", mmi->mainmem);
1568 printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));
1569 printf("TotalFree=%lu\n", MM_TotalFree(mm));
1570 printf("TotalUsed=%lu\n", mmi->mainmem+mmi->EMSmem+mmi->XMSmem+mmi->XMSmem);
1573 //==========================================================================
1576 =====================
1580 =====================
1583 void MM_EMSerr(byte *stri, byte err)
1585 //Returns a text string describing the error code in EMS.Error.
1589 strcat(stri, "successful");
1592 strcat(stri, "internal error");
1595 strcat(stri, "hardware malfunction");
1598 strcat(stri, "busy .. retry later");
1601 strcat(stri, "invalid handle");
1604 strcat(stri, "undefined function requested by application");
1607 strcat(stri, "no more handles available");
1610 strcat(stri, "error in save or restore of mapping context");
1613 strcat(stri, "insufficient memory pages in system");
1616 strcat(stri, "insufficient memory pages available");
1619 strcat(stri, "zero pages requested");
1622 strcat(stri, "invalid logical page number encountered");
1625 strcat(stri, "invalid physical page number encountered");
1628 strcat(stri, "page-mapping hardware state save area is full");
1631 strcat(stri, "save of mapping context failed");
1634 strcat(stri, "restore of mapping context failed");
1637 strcat(stri, "undefined subfunction");
1640 strcat(stri, "undefined attribute type");
1643 strcat(stri, "feature not supported");
1646 strcat(stri, "successful, but a portion of the source region has been overwritten");
1649 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1652 strcat(stri, "conventional and expanded memory regions overlap");
1655 strcat(stri, "offset within logical page exceeds size of logical page");
1658 strcat(stri, "region length exceeds 1 MB");
1661 strcat(stri, "source and destination EMS regions have same handle and overlap");
1664 strcat(stri, "memory source or destination type undefined");
1667 strcat(stri, "specified alternate map register or DMA register set not supported");
1670 strcat(stri, "all alternate map register or DMA register sets currently allocated");
1673 strcat(stri, "alternate map register or DMA register sets not supported");
1676 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1679 strcat(stri, "dedicated DMA channels not supported");
1682 strcat(stri, "specified dedicated DMA channel not supported");
1685 strcat(stri, "no such handle name");
1688 strcat(stri, "a handle found had no name, or duplicate handle name");
1691 strcat(stri, "attempted to wrap around 1M conventional address space");
1694 strcat(stri, "source array corrupted");
1697 strcat(stri, "operating system denied access");
1700 strcat(stri, "undefined error");
1704 //==========================================================================
1707 =====================
1711 =====================
1714 void MM_BombOnError(boolean bomb, mminfo_t *mm)
1716 mm->bombonerror = bomb;
1719 /*void MM_GetNewBlock(mminfo_t *mm)
1723 mm->mmnew=mm->mmfree;
1724 mm->mmfree=mm->mmfree->next;
1725 if(!(mm->mmnew=mm->mmfree))
1727 printf("MM_GETNEWBLOCK: No free blocks!\n");
1730 mm->mmfree=mm->mmfree->next;
1733 void MM_FreeBlock(mmblocktype *x, mminfo_t *mm)
1740 /*void MM_seguin(void)
1750 void MM_segude(void)
1758 pull data from far and put it into ds var