src/lib/16_mm.c

   1 /* Catacomb Apocalypse Source Code
   2  * Copyright (C) 1993-2014 Flat Rock Software
   3  *
   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.
   8  *
   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.
  13  *
  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.
  17  */
  18
  19 // NEWMM.C
  20
  21 /*
  22 =============================================================================
  23
  24                         ID software memory manager
  25                         --------------------------
  26
  27 Primary coder: John Carmack
  28
  29 RELIES ON
  30 ---------
  31 Quit (global_game_variables_t *gvar, char *error) function
  32
  33
  34 WORK TO DO
  35 ----------
  36 MM_SizePtr to change the size of a given pointer
  37
  38 Multiple purge levels utilized
  39
  40 EMS / XMS unmanaged routines
  41
  42 =============================================================================
  43 */
  44 /*
  45
  46 Open Watcom port by sparky4
  47
  48 */
  49 #include "src/lib/16_mm.h"
  50 #include "src/lib/16_ca.h"
  51 #include <malloc.h>
  52 #pragma hdrstop
  53
  54 #pragma warn -pro
  55 #pragma warn -use
  56
  57 /*
  58 =============================================================================
  59
  60                                                  GLOBAL VARIABLES
  61
  62 =============================================================================
  63 */
  64
  65 void            (* beforesort) (void);
  66 void            (* aftersort) (void);
  67 void            (* XMSaddr) (void);             // far pointer to XMS driver
  68
  69 /*
  70 =============================================================================
  71
  72                                                  LOCAL VARIABLES
  73
  74 =============================================================================
  75 */
  76 #ifndef __16_PM__
  77 static  char *ParmStringsexmm[] = {"noems","noxms",""};
  78 #endif
  79 /*
  80 ======================
  81 =
  82 = MML_CheckForEMS
  83 =
  84 = Routine from p36 of Extending DOS
  85 =
  86 =======================
  87 */
  88
  89 boolean MML_CheckForEMS(void)
  90 {
  91         boolean emmcfems=0;
  92         static char     emmname[] = "EMMXXXX0"; //fix by andrius4669
  93         __asm {
  94                 mov     dx,OFFSET emmname       //fix by andrius4669
  95                 mov     ax,0x3d00
  96                 int     0x21            // try to open EMMXXXX0 device
  97                 jc      error
  98
  99                 mov     bx,ax
 100                 mov     ax,0x4400
 101
 102                 int     0x21            // get device info
 103                 jc      error
 104
 105                 and     dx,0x80
 106                 jz      error
 107
 108                 mov     ax,0x4407
 109
 110                 int     0x21            // get status
 111                 jc      error
 112                 or      al,al
 113                 jz      error
 114
 115                 mov     ah,0x3e
 116                 int     0x21            // close handle
 117                 jc      error
 118                 //
 119                 // EMS is good
 120                 //
 121                 mov     emmcfems,1
 122                 jmp End
 123 #ifdef __BORLANDC__
 124         }
 125 #endif
 126                 error:
 127 #ifdef __BORLANDC__
 128         __asm {
 129 #endif
 130                 //
 131                 // EMS is bad
 132                 //
 133                 mov     emmcfems,0
 134 #ifdef __BORLANDC__
 135         }
 136 #endif
 137                 End:
 138 #ifdef __WATCOMC__
 139         }
 140 #endif
 141         return(emmcfems);
 142 }
 143
 144 #ifndef __16_PM__
 145 /*
 146 ======================
 147 =
 148 = MML_SetupEMS
 149 =
 150 =======================
 151 */
 152
 153 byte MML_SetupEMS(global_game_variables_t *gvar)
 154 {
 155         byte    str[160];
 156         byte    err;
 157         boolean errorflag=false;
 158
 159         unsigned int EMSVer = 0;
 160         //byte  EMS_status;
 161         unsigned        totalEMSpages,freeEMSpages,EMSPageFrame,EMSpagesmapped,EMSHandle;
 162         totalEMSpages = freeEMSpages = EMSPageFrame = EMSpagesmapped = 0;
 163
 164         __asm {
 165                 mov     ah,EMS_STATUS
 166                 int     EMS_INT                                         // make sure EMS hardware is present
 167                 or      ah,ah
 168                 //mov   [EMS_status],ah
 169                 jnz     error
 170
 171                 mov     ah,EMS_VERSION
 172                 int     EMS_INT
 173                 or      ah,ah
 174                 jnz     error
 175                 mov     [EMSVer],ax                             //      set EMSVer
 176                 cmp     al,0x32                                         // only work on ems 3.2 or greater
 177                 jb      error
 178
 179                 mov     ah,EMS_GETFRAME
 180                 int     EMS_INT                                         // find the page frame address
 181                 or      ah,ah
 182                 jnz     error
 183                 mov     [EMSPageFrame],bx
 184
 185                 mov     ah,EMS_GETPAGES
 186                 int     EMS_INT                                         // find out how much EMS is there
 187                 or      ah,ah
 188                 jnz     error
 189                 mov     [totalEMSpages],dx
 190                 mov     [freeEMSpages],bx
 191                 or      bx,bx
 192                 jz      noEMS                                           // no EMS at all to allocate
 193                                                                                         //EXPAND DONG!!!!
 194                 cmp     [EMSVer],0x40
 195                 jb      low
 196                 cmp     bx,[freeEMSpages]
 197                 jle     getpages
 198                 mov     bx,[freeEMSpages]
 199                 jmp     getpages
 200 #ifdef __BORLANDC__
 201         }
 202 #endif
 203         low:
 204 #ifdef __BORLANDC__
 205         __asm {
 206 #endif
 207                 cmp     bx,4
 208                 jle     getpages                                        // there is only 1,2,3,or 4 pages
 209                 mov     bx,4                                            // we can't use more than 4 pages
 210 #ifdef __BORLANDC__
 211         }
 212 #endif
 213         getpages:
 214 #ifdef __BORLANDC__
 215         __asm {
 216 #endif
 217                 mov     [EMSpagesmapped],bx
 218                 mov     ah,EMS_ALLOCPAGES                       // allocate up to 64k of EMS
 219                 int     EMS_INT
 220                 or      ah,ah
 221                 jnz     error
 222                 mov     [EMSHandle],dx
 223                 jmp End
 224 #ifdef __BORLANDC__
 225         }
 226 #endif
 227         error:
 228 #ifdef __BORLANDC__
 229         __asm {
 230 #endif
 231                 mov     err,ah
 232                 mov     errorflag,1
 233                 jmp End
 234 #ifdef __BORLANDC__
 235         }
 236 #endif
 237 noEMS:
 238 End:
 239 #ifdef __WATCOMC__
 240         }
 241 #endif
 242         if(errorflag==true)
 243         {
 244                 strcpy(str,"MM_SetupEMS: EMS error ");
 245                 MM_EMSerr(str, err);
 246                 printf("%s\n",str);
 247                 return err;
 248         }
 249         gvar->mm.totalEMSpages=totalEMSpages;
 250         gvar->mm.freeEMSpages=freeEMSpages;
 251         gvar->mm.EMSPageFrame=EMSPageFrame;
 252         gvar->mm.EMSpagesmapped=EMSpagesmapped;
 253         gvar->mm.EMSHandle=EMSHandle;
 254         gvar->mm.EMSVer=EMSVer;
 255         return 0;
 256 }
 257
 258
 259 /*
 260 ======================
 261 =
 262 = MML_ShutdownEMS
 263 =
 264 =======================
 265 */
 266
 267 void MML_ShutdownEMS(global_game_variables_t *gvar)
 268 {
 269         boolean errorflag=false;
 270         unsigned EMSHandle=gvar->mm.EMSHandle;
 271
 272         if(!EMSHandle)
 273                 return;
 274         __asm {
 275                 mov     ah,EMS_FREEPAGES
 276                 mov     dx,[EMSHandle]
 277                 int     EMS_INT
 278                 or      ah,ah
 279                 jz      ok
 280                 mov     errorflag,1
 281 #ifdef __BORLANDC__
 282         }
 283 #endif
 284                 ok:
 285 #ifdef __WATCOMC__
 286         }
 287 #endif
 288         if(errorflag==true)
 289                 Quit (gvar, "MML_ShutdownEMS: Error freeing EMS!\n");   //++++ add something
 290 }
 291
 292 /*
 293 ====================
 294 =
 295 = MM_MapEMS
 296 =
 297 = Maps the 64k of EMS used by memory manager into the page frame
 298 = for general use.  This only needs to be called if you are keeping
 299 = other things in EMS.
 300 =
 301 ====================
 302 */
 303
 304 byte MM_MapEMS(global_game_variables_t *gvar)
 305 {
 306         byte    str[160];
 307         unsigned        EMSHandle;
 308         byte err;
 309         boolean errorflag=false;
 310         int     i;
 311         EMSHandle=gvar->mm.EMSHandle;
 312
 313         for (i=0;i<4/*MAPPAGES*/;i++)
 314         {
 315                 __asm {
 316                         mov     ah,EMS_MAPPAGE
 317                         mov     bx,[i]                  // logical page
 318                         mov     al,bl                   // physical page
 319                         mov     dx,[EMSHandle]  // handle
 320                         int     EMS_INT
 321                         or      ah,ah
 322                         jnz     error
 323                         jmp End
 324 #ifdef __BORLANDC__
 325                 }
 326 #endif
 327                         error:
 328 #ifdef __BORLANDC__
 329                 __asm {
 330 #endif
 331                         mov     err,ah
 332                         mov     errorflag,1
 333 #ifdef __BORLANDC__
 334                 }
 335 #endif
 336                         End:
 337 #ifdef __WATCOMC__
 338                 }
 339 #endif
 340                 if(errorflag==true)
 341                 {
 342                         strcpy(str,"MM_MapEMS: EMS error ");
 343                         MM_EMSerr(str, err);
 344                         printf("%s\n",str);
 345                         return err;
 346                 }
 347         }
 348         gvar->mmi.EMSmem = (i)*0x4000lu;
 349         return 0;
 350 }
 351
 352 byte MM_MapXEMS(global_game_variables_t *gvar)
 353 {
 354 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
 355
 356         //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
 357         //PhysicalStart = Physical page first logical page is mapped to
 358         //LogicalStart  = First logical page to map
 359         //NumPages      = Number of pages to map (1 to 4)
 360         //Handle        = EMS handle logical pages are allocated to
 361
 362   /*//Create a buffer containing the page information
 363 //  FOR x = 0 TO NumPages - 1
 364 //    MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
 365 //  NEXT*/
 366
 367 //  Regs.ax = 0x5000                           //Map the pages in the buffer
 368 //  Regs.cx = NumPages                         //to the pageframe
 369 //  Regs.dx = Handle
 370 //  Regs.ds = VARSEG(MapInfo$)
 371 //  Regs.si = SADD(MapInfo$)
 372 //  InterruptX 0x67, Regs, Regs
 373 //      EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100  //Store the status code
 374
 375 //END SUB
 376         byte    str[160];
 377         byte err;
 378         word    EMSHandle;
 379         boolean errorflag=false;
 380         int     i;
 381         EMSHandle=gvar->mm.EMSHandle;
 382
 383         if(gvar->mm.EMSVer<0x40)
 384                 return 5;
 385
 386         for (i=0;i<MAPPAGES;i++)
 387         {
 388                 __asm {
 389                         mov     ah,EMS_MAPXPAGE
 390                         mov     cx,[i]                  // logical page
 391                         mov     al,bl                   // physical page
 392                         mov     dx,[EMSHandle]  // handle
 393                         int     EMS_INT
 394                         or      ah,ah
 395                         jnz     error
 396                         jmp End
 397 #ifdef __BORLANDC__
 398                 }
 399 #endif
 400                         error:
 401 #ifdef __BORLANDC__
 402                 __asm {
 403 #endif
 404                         mov     err,ah
 405                         mov     errorflag,1
 406 #ifdef __BORLANDC__
 407                 }
 408 #endif
 409                         End:
 410 #ifdef __WATCOMC__
 411                 }
 412 #endif
 413                 if(errorflag==true)
 414                 {
 415                         //strcpy(str,"MM_MapXEMS: EMS error 0x");
 416                         strcpy(str,"MM_MapXEMS: EMS error ");
 417                         //itoa(err,str2,16);
 418                         MM_EMSerr(str, err);
 419                         printf("%s\n",str);
 420                         //printf("%s%x\n",str, err);
 421                         //printf("FACK! %x\n", err);
 422                         return err;
 423                 }
 424         }
 425         gvar->mmi.EMSmem = (i)*0x4000lu;
 426         return 0;
 427 }
 428 #endif
 429 //==========================================================================
 430
 431 /*
 432 ======================
 433 =
 434 = MML_CheckForXMS
 435 =
 436 = Check for XMM driver
 437 =
 438 =======================
 439 */
 440
 441 boolean MML_CheckForXMS(void)
 442 {
 443         //numUMBs = 0;
 444         boolean errorflag=false;
 445
 446         __asm {
 447                 mov     ax,0x4300
 448                 int     0x2f                            // query status of installed diver
 449                 cmp     al,0x80
 450                 je      good
 451                 mov     errorflag,1
 452 #ifdef __BORLANDC__
 453         }
 454 #endif
 455                 good:
 456 #ifdef __WATCOMC__
 457         }
 458 #endif
 459         if(errorflag==true) return false;
 460         else return true;
 461 }
 462
 463 #ifndef __16_PM__
 464 /*
 465 ======================
 466 =
 467 = MML_SetupXMS
 468 =
 469 = Try to allocate all upper memory block
 470 =
 471 =======================
 472 */
 473
 474 void MML_SetupXMS(global_game_variables_t *gvar)
 475 {
 476         word    base,size;
 477
 478
 479         __asm {
 480                 mov     ax,0x4310
 481                 int     0x2f
 482                 mov     [WORD PTR XMSaddr],bx
 483                 mov     [WORD PTR XMSaddr+2],es         // function pointer to XMS driver
 484         }
 485 getmemory:
 486         __asm {
 487                 mov     ah,XMS_ALLOCUMB
 488                 mov     dx,0xffff                                       // try for largest block possible
 489                 //mov     ax,dx                                         // Set available Kbytes.
 490                 call    [DWORD PTR XMSaddr]
 491                 or      ax,ax
 492                 jnz     gotone
 493
 494                 cmp     bl,0xb0                                         // error: smaller UMB is available
 495                 jne     done;
 496
 497                 mov     ah,XMS_ALLOCUMB
 498                 call    [DWORD PTR XMSaddr]             // DX holds largest available UMB
 499                 or      ax,ax
 500                 jz      done                                            // another error...
 501 #ifdef __BORLANDC__
 502         }
 503 #endif
 504                 gotone:
 505 #ifdef __BORLANDC__
 506         __asm {
 507 #endif
 508                 mov     [base],bx
 509                 mov     [size],dx
 510 #ifdef __BORLANDC__
 511         }
 512 #endif
 513                 done:
 514 #ifdef __WATCOMC__
 515         }
 516 #endif
 517 //      printf("base=%u ", base); printf("size=%u\n", size);
 518         MML_UseSpace(base,size, gvar);
 519         gvar->mmi.XMSmem += size*16;
 520         gvar->mm.UMBbase[gvar->mm.numUMBs] = base;
 521         gvar->mm.numUMBs++;
 522         if(gvar->mm.numUMBs < MAXUMBS)
 523                 goto getmemory;
 524 }
 525
 526
 527 /*
 528 ======================
 529 =
 530 = MML_ShutdownXMS
 531 =
 532 ======================
 533 */
 534
 535 void MML_ShutdownXMS(global_game_variables_t *gvar)
 536 {
 537         int     i;
 538         unsigned        base;
 539
 540         for (i=0;i<gvar->mm.numUMBs;i++)
 541         {
 542                 base = gvar->mm.UMBbase[i];
 543                 __asm {
 544                         mov     ah,XMS_FREEUMB
 545                         mov     dx,[base]
 546                         call    [DWORD PTR XMSaddr]
 547                 }
 548         }
 549 }
 550 #endif
 551 //==========================================================================
 552
 553 /*
 554 ======================
 555 =
 556 = MML_UseSpace
 557 =
 558 = Marks a range of paragraphs as usable by the memory manager
 559 = This is used to mark space for the near heap, far heap, ems page frame,
 560 = and upper memory blocks
 561 =
 562 ======================
 563 */
 564
 565 /*void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
 566 {
 567         mmblocktype far *scan,far *last;
 568         word            segm=1;
 569         word    oldend;
 570         dword           segmlen;
 571         dword           extra;
 572
 573         scan = last = gvar->mm.mmhead;
 574         gvar->mm.mmrover = gvar->mm.mmhead;             // reset rover to start of memory
 575
 576 //
 577 // search for the block that contains the range of segments
 578 //
 579         while(scan->start+scan->length < segstart)
 580         {
 581                 last = scan;
 582                 scan = scan->next;
 583         }
 584
 585 //
 586 // take the given range out of the block
 587 //
 588         oldend = scan->start + scan->length;
 589         extra = oldend - (segstart+seglength);
 590
 591         segmlen=extra;
 592
 593         //++++emsver stuff!
 594         if(segm>1)/// || extra>=0x10000lu)
 595         //if(extra>0xfffflu)
 596         {
 597                 scan->blob=segm;
 598
 599                 //MML_UseSpace(segstart, seglength, gvar);
 600
 601                 printf("MML_UseSpace: Segment spans two blocks!\n");
 602         //}
 603         printf("segm=%u         ", segm);
 604         printf("ex=%lu  ", extra);
 605         printf("old=%u  ", oldend);
 606         printf("start+seglen=%lu\n", segstart+seglength);
 607         printf("segsta=%x       ", segstart);
 608         printf("len=%lu ", scan->length);
 609         printf("seglen=%lu      ", seglength);
 610         printf("segmlen=%lu\n", segmlen);
 611         }
 612 //++++todo: linked list of segment!
 613         if(segstart == scan->start)
 614         {
 615                 last->next = scan->next;                        // unlink block
 616                 FREEBLOCK(scan);
 617                 scan = last;
 618         }
 619         else
 620                 scan->length = segstart-scan->start;    // shorten block
 621
 622         if(extra > 0)
 623         {
 624                 GETNEWBLOCK;
 625                 gvar->mm.mmnew->useptr = NULL;
 626
 627                 gvar->mm.mmnew->next = scan->next;
 628                 scan->next = gvar->mm.mmnew;
 629                 gvar->mm.mmnew->start = segstart+seglength;
 630                 gvar->mm.mmnew->length = extra;
 631                 gvar->mm.mmnew->attributes = LOCKBIT;
 632         }//else if(segm>0) goto segu;
 633
 634 }*/
 635 void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
 636 {
 637         mmblocktype far *scan,far *last;
 638         word    oldend;
 639         sdword          extra;
 640         //word segm=1;
 641
 642         scan = last = gvar->mm.mmhead;
 643         gvar->mm.mmrover = gvar->mm.mmhead;             // reset rover to start of memory
 644
 645 //
 646 // search for the block that contains the range of segments
 647 //
 648         while (scan->start+scan->length < segstart)
 649         {
 650                 last = scan;
 651                 scan = scan->next;
 652         }
 653
 654 //
 655 // find out how many blocks it spans!
 656 //
 657         /*for(;seglength>=0x10000;seglength-=0xFFFF)
 658         {
 659                 //printf("      seglen=%lu\n", segmlen);
 660                 segm++;
 661         }*/
 662
 663 //
 664 // take the given range out of the block
 665 //
 666         oldend = scan->start + scan->length;
 667         extra = oldend - (segstart+((unsigned)seglength));
 668         if (extra < 0)
 669         {
 670                 printf("========================================\n");
 671                 printf("start=%x        ", scan->start);
 672                 printf("old=%u  ", oldend);
 673                 printf("start+seglen=%lu\n", segstart+seglength);
 674                 printf("segsta=%x       ", segstart);
 675                 printf("len=%lu ", scan->length);
 676                 printf("seglen=%lu      ", seglength);
 677                 printf("\n");
 678                 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
 679                 printf("========================================\n");
 680                 //return;
 681         }
 682
 683         if (segstart == scan->start)
 684         {
 685                 last->next = scan->next;                        // unlink block
 686                 FREEBLOCK(scan);
 687                 scan = last;
 688         }
 689         else
 690                 scan->length = segstart-scan->start;    // shorten block
 691
 692         if (extra > 0)
 693         {
 694                 GETNEWBLOCK;
 695                 gvar->mm.mmnew->useptr = NULL;
 696
 697                 gvar->mm.mmnew->next = scan->next;
 698                 scan->next = gvar->mm.mmnew;
 699                 gvar->mm.mmnew->start = segstart+seglength;
 700                 gvar->mm.mmnew->length = extra;
 701                 gvar->mm.mmnew->attributes = LOCKBIT;
 702         }
 703
 704 }
 705
 706 //==========================================================================
 707
 708 /*
 709 ====================
 710 =
 711 = MML_ClearBlock
 712 =
 713 = We are out of blocks, so free a purgable block
 714 =
 715 ====================
 716 */
 717
 718 void MML_ClearBlock(global_game_variables_t *gvar)
 719 {
 720         mmblocktype far *scan;//,far *last;
 721
 722         scan = gvar->mm.mmhead->next;
 723
 724         while(scan)
 725         {
 726                 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
 727                 {
 728                         MM_FreePtr(scan->useptr, gvar);
 729                         return;
 730                 }
 731                 scan = scan->next;
 732         }
 733
 734         printf("MM_ClearBlock: No purgable blocks!\n");
 735 }
 736
 737
 738 //==========================================================================
 739
 740 /*
 741 ===================
 742 =
 743 = MM_Startup
 744 =
 745 = Grabs all space from turbo with malloc/farmalloc
 746 = Allocates bufferseg misc buffer
 747 =
 748 ===================
 749 */
 750
 751 void MM_Startup(global_game_variables_t *gvar)
 752 {
 753         int i;
 754         //dword length,seglength;
 755         dword length; word seglength;
 756         void far        *start;
 757         word    segstart;//,endfree;
 758
 759         if(gvar->mm.mmstarted)
 760                 MM_Shutdown(gvar);
 761
 762         gvar->mm.mmstarted = true;
 763         gvar->mm.bombonerror = true;
 764
 765 //
 766 // set up the linked list (everything in the free list;
 767 //
 768         gvar->mm.mmhead = NULL;
 769         gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);
 770         for(i=0;i<MAXBLOCKS-1;i++)
 771                 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);
 772         gvar->mm.mmblocks[i].next = NULL;
 773
 774 //
 775 // locked block of all memory until we punch out free space
 776 //
 777         GETNEWBLOCK;
 778         gvar->mm.mmhead = gvar->mm.mmnew;                               // this will allways be the first node
 779         gvar->mm.mmnew->start = 0;
 780         gvar->mm.mmnew->length = 0xffff;
 781         gvar->mm.mmnew->attributes = LOCKBIT;
 782         gvar->mm.mmnew->next = NULL;
 783         gvar->mm.mmrover = gvar->mm.mmhead;
 784
 785 //
 786 // get all available near conventional memory segments
 787 //
 788 #ifdef __WATCOMC__
 789         _nheapgrow();
 790         length=(dword)_memavl();//(dword)GetFreeSize();
 791         start = (void __far *)(gvar->mm.nearheap = _nmalloc(length));
 792 #endif
 793 #ifdef __BORLANDC__
 794         length=(word)coreleft();
 795         start = (void far *)(gvar->mm.nearheap = malloc(length));
 796 #endif
 797         length -= 16-(FP_OFF(start)&15);
 798         length -= SAVENEARHEAP;
 799         seglength = length / 16;                        // now in paragraphs
 800         segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
 801         MML_UseSpace(segstart,seglength, gvar);
 802         gvar->mmi.nearheap = length;
 803         //0000printf("near:     start=%Fp       segstart=%x     seglen=%lu      len=%lu\n", start, segstart, (dword)seglength, length);
 804
 805 //
 806 // get all available far conventional memory segments
 807 //
 808         //printf("_FARCORELEFT                          %lu\n", _FCORELEFT);
 809 #ifdef __WATCOMC__
 810         _fheapgrow();
 811         length=_FCORELEFT;//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
 812 #endif
 813 #ifdef __BORLANDC__
 814 //0000  printf("farcoreleft()                           %lu\n", farcoreleft());
 815 //0000  printf("(farcoreleft()+32)-_FCORELEFT   %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
 816         length=farcoreleft();//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
 817 #endif
 818         start = gvar->mm.farheap = _fmalloc(length);
 819         //start = gvar->mm.farheap = halloc(length, 1);
 820         length -= 16-(FP_OFF(start)&15);
 821         length -= SAVEFARHEAP;
 822         seglength = length / 16;                        // now in paragraphs
 823         segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
 824         MML_UseSpace(segstart,seglength, gvar);
 825         gvar->mmi.farheap = length;
 826         //0000printf("far:      start=%Fp       segstart=%x     seglen=%lu      len=%lu\n", start, segstart, (dword)seglength, length);
 827
 828         gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
 829
 830 #if !defined(__16_PM__)// && defined(__WATCOMC__)
 831         if(!dbg_debugpm) {
 832 //
 833 // detect EMS and allocate up to 64K at page frame
 834 //
 835         gvar->mmi.EMSmem = 0;
 836 //goto emsskip; //0000
 837         for(i = 1;i < _argc;i++)
 838         {
 839                 if(US_CheckParm(_argv[i],ParmStringsexmm) == 0)
 840                         goto emsskip;                           // param NOEMS
 841         }
 842         if(MML_CheckForEMS())
 843         {
 844                 MML_SetupEMS(gvar);                                     // allocate space
 845                 //16_PM: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
 846                 MML_UseSpace(gvar->mm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);
 847                 //if(gvar->pm.emm.EMSVer<0x40)
 848                         MM_MapEMS(gvar);                                        // map in used pages
 849                 //else
 850                         //MM_MapXEMS(gvar);                                     // map in used pages
 851         }
 852
 853 //
 854 // detect XMS and get upper memory blocks
 855 //
 856 emsskip:
 857         gvar->mmi.XMSmem = 0;
 858 goto xmsskip;//0000
 859         for(i = 1;i < _argc;i++)
 860         {
 861                 if(US_CheckParm( _argv[i],ParmStringsexmm) == 0)
 862                         goto xmsskip;                           // param NOXMS
 863         }
 864         if(MML_CheckForXMS())
 865         {
 866                 MML_SetupXMS(gvar);                                     // allocate as many UMBs as possible
 867         }
 868
 869         }
 870 xmsskip:
 871 #endif
 872 //
 873 // allocate the misc buffer
 874 //
 875         gvar->mm.mmrover = gvar->mm.mmhead;             // start looking for space after low block
 876
 877         MM_GetPtr(&(gvar->mm.bufferseg),BUFFERSIZE, gvar);
 878 }
 879
 880 //==========================================================================
 881
 882 /*
 883 ====================
 884 =
 885 = MM_Shutdown
 886 =
 887 = Frees all conventional, EMS, and XMS allocated
 888 =
 889 ====================
 890 */
 891
 892 void MM_Shutdown(global_game_variables_t *gvar)
 893 {
 894         if(!(gvar->mm.mmstarted))
 895                 return;
 896
 897         _ffree(gvar->mm.farheap);//     printf("                far freed\n");
 898 #ifdef __WATCOMC__
 899         _nfree(gvar->mm.nearheap);//    printf("                near freed\n");
 900 #endif
 901 #ifdef __BORLANDC__
 902         free(gvar->mm.nearheap);//      printf("                near freed\n");
 903 #endif
 904 #ifndef __16_PM__
 905 #ifdef __DEBUG__
 906         if(!dbg_debugpm) {
 907 #endif
 908         if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf("               EMS freed\n"); }
 909         if(MML_CheckForXMS()){ MML_ShutdownXMS(gvar); }//printf("               XMS freed\n"); }
 910 #ifdef __DEBUG__
 911         }
 912 #endif
 913 #endif
 914 }
 915
 916 //==========================================================================
 917
 918 /*
 919 ====================
 920 =
 921 = MM_GetPtr
 922 =
 923 = Allocates an unlocked, unpurgable block
 924 =
 925 ====================
 926 */
 927
 928 void MM_GetPtr (memptr *baseptr, dword size, global_game_variables_t *gvar)
 929 {
 930         mmblocktype far *scan,far *lastscan,far *endscan,far *purge,far *next;
 931         int                     search;
 932         unsigned        needed,startseg;
 933
 934         needed = (size+15)/16;          // convert size from bytes to paragraphs
 935
 936         GETNEWBLOCK;                            // fill in start and next after a spot is found
 937         gvar->mm.mmnew->length = needed;
 938         gvar->mm.mmnew->useptr = baseptr;
 939         //if(gvar->mm.mmnew->useptr==NULL){
 940 #ifdef __DEBUG_MM__
 941                 printf("MM_GetPtr\n");
 942                 //%04x
 943                 printf("        baseptr=%Fp     ", baseptr); printf("useptr=%Fp\n", gvar->mm.mmnew->useptr);
 944                 printf("        *baseptr=%Fp    ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
 945                 printf("        &baseptr=%Fp    ", &baseptr); printf("&useptr=%Fp\n", &(gvar->mm.mmnew->useptr));
 946 #endif
 947         //Quit(gvar, "gvar->mm.mmnew->useptr==NULL"); }
 948         gvar->mm.mmnew->attributes = BASEATTRIBUTES;
 949
 950 //tryagain:
 951         for (search = 0; search<3; search++)
 952         {
 953         //
 954         // first search:        try to allocate right after the rover, then on up
 955         // second search:       search from the head pointer up to the rover
 956         // third search:        compress memory, then scan from start
 957                 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)
 958                         search++;
 959
 960                 switch (search)
 961                 {
 962                 case 0:
 963                         lastscan = gvar->mm.mmrover;
 964                         scan = gvar->mm.mmrover->next;
 965                         endscan = NULL;
 966                         break;
 967                 case 1:
 968                         lastscan = gvar->mm.mmhead;
 969                         scan = gvar->mm.mmhead->next;
 970                         endscan = gvar->mm.mmrover;
 971                         break;
 972                 case 2:
 973                         MM_SortMem (gvar);
 974                         lastscan = gvar->mm.mmhead;
 975                         scan = gvar->mm.mmhead->next;
 976                         endscan = NULL;
 977                         break;
 978                 }
 979
 980                 startseg = lastscan->start + lastscan->length;
 981
 982                 while (scan != endscan)
 983                 {
 984                         if (scan->start - startseg >= needed)
 985                         {
 986                         //
 987                         // got enough space between the end of lastscan and
 988                         // the start of scan, so throw out anything in the middle
 989                         // and allocate the new block
 990                         //
 991                                 purge = lastscan->next;
 992                                 lastscan->next = gvar->mm.mmnew;
 993                                 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;
 994                                 gvar->mm.mmnew->next = scan;
 995                                 while ( purge != scan)
 996                                 {       // free the purgable block
 997                                         next = purge->next;
 998                                         FREEBLOCK(purge);
 999                                         purge = next;           // purge another if not at scan
1000                                 }
1001                                 gvar->mm.mmrover = gvar->mm.mmnew;
1002                                 return; // good allocation!
1003                         }
1004
1005                         //
1006                         // if this block is purge level zero or locked, skip past it
1007                         //
1008                         if ( (scan->attributes & LOCKBIT)
1009                                 || !(scan->attributes & PURGEBITS) )
1010                         {
1011                                 lastscan = scan;
1012                                 startseg = lastscan->start + lastscan->length;
1013                         }
1014
1015
1016                         scan=scan->next;                // look at next line
1017                 }
1018         }
1019
1020         if (gvar->mm.bombonerror)
1021         {
1022 #ifdef __WATCOMC__
1023                 //heapdump();
1024 #endif
1025                 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));
1026                 Quit(gvar, "for stability reasons the program will shut down! wwww\n");
1027         }
1028         else
1029                 gvar->mm.mmerror = true;
1030 }
1031
1032 //==========================================================================
1033
1034 /*
1035 ====================
1036 =
1037 = MM_FreePtr
1038 =
1039 = Allocates an unlocked, unpurgable block
1040 =
1041 ====================
1042 */
1043
1044 void MM_FreePtr(memptr *baseptr, global_game_variables_t *gvar)
1045 {
1046         mmblocktype far *scan,far *last;
1047
1048         last = gvar->mm.mmhead;
1049         scan = last->next;
1050
1051         if(baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
1052                 gvar->mm.mmrover = gvar->mm.mmhead;
1053
1054         while(scan->useptr != baseptr && scan)
1055         {
1056                 last = scan;
1057                 scan = scan->next;
1058         }
1059
1060         if(!scan)
1061         {
1062                 printf("MM_FreePtr: Block not found!\n");
1063                 return;
1064         }
1065
1066         last->next = scan->next;
1067
1068         FREEBLOCK(scan);
1069 }
1070 //==========================================================================
1071
1072 /*
1073 =====================
1074 =
1075 = MM_SetPurge
1076 =
1077 = Sets the purge level for a block (locked blocks cannot be made purgable)
1078 =
1079 =====================
1080 */
1081
1082
1083 void MM_SetPurge(memptr *baseptr, int purge, global_game_variables_t *gvar)
1084 {
1085         mmblocktype far *start;
1086
1087         start = gvar->mm.mmrover;
1088
1089         do
1090         {
1091                 if(gvar->mm.mmrover->useptr == baseptr)
1092                         break;
1093
1094                 gvar->mm.mmrover = gvar->mm.mmrover->next;
1095
1096                 if(!gvar->mm.mmrover)
1097                         gvar->mm.mmrover = gvar->mm.mmhead;
1098                 else if(gvar->mm.mmrover == start)
1099                 {
1100                         Quit (gvar, "MM_SetPurge: Block not found!");
1101                         //return;
1102                 }
1103
1104         } while(1);
1105
1106         gvar->mm.mmrover->attributes &= ~PURGEBITS;
1107         gvar->mm.mmrover->attributes |= purge;
1108 }
1109
1110 //==========================================================================
1111
1112 /*
1113 =====================
1114 =
1115 = MM_SetLock
1116 =
1117 = Locks / unlocks the block
1118 =
1119 =====================
1120 */
1121
1122 void MM_SetLock(memptr *baseptr, boolean locked, global_game_variables_t *gvar)
1123 {
1124         mmblocktype far *start;
1125
1126         start = gvar->mm.mmrover;
1127
1128         do
1129         {
1130                 if(gvar->mm.mmrover->useptr == baseptr)
1131                         break;
1132
1133                 gvar->mm.mmrover = gvar->mm.mmrover->next;
1134
1135                 if(!gvar->mm.mmrover)
1136                         gvar->mm.mmrover = gvar->mm.mmhead;
1137                 else if(gvar->mm.mmrover == start)
1138                 {
1139                         Quit (gvar, "MM_SetLock: Block not found!");
1140                         //return;
1141                 }
1142
1143         } while(1);
1144
1145         gvar->mm.mmrover->attributes &= ~LOCKBIT;
1146         gvar->mm.mmrover->attributes |= locked*LOCKBIT;
1147 }
1148
1149 //==========================================================================
1150
1151 /*
1152 =====================
1153 =
1154 = MM_SortMem
1155 =
1156 = Throws out all purgable stuff and compresses movable blocks
1157 =
1158 =====================
1159 */
1160
1161 void MM_SortMem(global_game_variables_t *gvar)
1162 {
1163         mmblocktype far *scan,far *last,far *next;
1164         unsigned        start,length,source,dest;//++++,oldborder;
1165         //++++int                       playing;
1166
1167         //
1168         // lock down a currently playing sound
1169         //
1170 /*++++  playing = SD_SoundPlaying ();
1171         if(playing)
1172         {
1173                 switch (SoundMode)
1174                 {
1175                 case sdm_PC:
1176                         playing += STARTPCSOUNDS;
1177                         break;
1178                 case sdm_AdLib:
1179                         playing += STARTADLIBSOUNDS;
1180                         break;
1181                 }
1182                 MM_SetLock(&(memptr)audiosegs[playing],true);
1183         }
1184
1185
1186         SD_StopSound();*/
1187 //      oldborder = bordercolor;
1188 //      VW_ColorBorder (15);
1189
1190         if(beforesort)
1191                 beforesort();
1192
1193         scan = gvar->mm.mmhead;
1194
1195         last = NULL;            // shut up compiler warning
1196
1197         while(scan)
1198         {
1199                 if(scan->attributes & LOCKBIT)
1200                 {
1201                 //
1202                 // block is locked, so try to pile later blocks right after it
1203                 //
1204                         start = scan->start + scan->length;
1205                 }
1206                 else
1207                 {
1208                         if(scan->attributes & PURGEBITS)
1209                         {
1210                         //
1211                         // throw out the purgable block
1212                         //
1213                                 next = scan->next;
1214                                 FREEBLOCK(scan);
1215                                 //MM_FreeBlock(scan, gvar);
1216                                 last->next = next;
1217                                 scan = next;
1218                                 continue;
1219                         }
1220                         else
1221                         {
1222                         //
1223                         // push the non purgable block on top of the last moved block
1224                         //
1225                                 if(scan->start != start)
1226                                 {
1227                                         length = scan->length;
1228                                         source = scan->start;
1229                                         dest = start;
1230                                         while(length > 0xf00)
1231                                         {
1232                                                 movedata(source,0,dest,0,0xf00*16);
1233                                                 length -= 0xf00;
1234                                                 source += 0xf00;
1235                                                 dest += 0xf00;
1236                                         }
1237                                         movedata(source,0,dest,0,length*16);
1238
1239                                         scan->start = start;
1240                                         *(unsigned *)scan->useptr = start;
1241                                 }
1242                                 start = scan->start + scan->length;
1243                         }
1244                 }
1245
1246                 last = scan;
1247                 scan = scan->next;              // go to next block
1248         }
1249
1250         gvar->mm.mmrover = gvar->mm.mmhead;
1251
1252         if(aftersort)
1253                 aftersort();
1254
1255 //      VW_ColorBorder (oldborder);
1256
1257 /*++++  if(playing)
1258                 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1259 }
1260
1261 //==========================================================================
1262
1263 /*
1264 =====================
1265 =
1266 = MM_ShowMemory
1267 =
1268 =====================
1269 */
1270
1271 void MM_ShowMemory(global_game_variables_t *gvar)
1272 {
1273         mmblocktype far *scan;
1274         //word temp;
1275         sdword  end,owner;
1276         //word chx,chy;
1277         word w;
1278         //dword wwww;
1279         byte    scratch[160],scratch0[4096],str[16];//[[[[scratch1[160],
1280         //byte d = '#';
1281 //[[[[  VW_SetDefaultColors();
1282 //[[[[  VW_SetLineWidth(40);
1283 //++++mh        temp = bufferofs;
1284 //++++mh        bufferofs = 0;
1285 //[[[[  VW_SetScreen (0,0);
1286         scan = gvar->mm.mmhead;
1287         end = -1;
1288
1289         CA_OpenDebug (gvar);
1290         w=0;
1291         while(scan)
1292         {
1293                 strcpy(scratch, AARESET);
1294                 if(scan->attributes & PURGEBITS)
1295                         strcpy(scratch0, AAMAGENTA);            // dark purple = purgable
1296                 else
1297                         strcpy(scratch0, AABLUE);               // medium blue = non purgable
1298                 if(scan->attributes & LOCKBIT)
1299                         strcpy(scratch0, AARED);                // red = locked
1300                 if(scan->start<=end)
1301                 {
1302                         printf("\nend==%d\n\n", end);
1303                         strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1304                         strcat(scratch, "End's Size: ");
1305                         ultoa (end,str,10);
1306                         strcat (scratch,str);
1307                         strcat(scratch, "\nscan->start's Size: ");
1308                         ultoa (scan->start,str,10);
1309                         strcat (scratch,str);
1310                         write(gvar->handle.debughandle,scratch,strlen(scratch));
1311                         //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1312                         break;
1313                 }
1314                 end = scan->start+(scan->length)-1;
1315 //++++          chy = scan->start/320;
1316 //++++          chx = scan->start%320;
1317                                 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1318                                 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1319                                 //{
1320 //++++                                  modexClearRegion(page, chx, chy, 4, 4, color);
1321                                 //}
1322 //++++          VW_Hlin(scan->start,(unsigned)end,0,color);
1323                 for(w=(scan->start)/80;w<=end/80;w++)
1324                 {
1325                         //printf("+     %u      %lu\n", w, scan->length);
1326                         strcat(scratch0, "+");
1327                 }
1328                 //++==++==optional strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1329 //++++          VW_Plot(scan->start,0,15);
1330 //++++                          modexClearRegion(page, chx, chy, 4, 4, 15);
1331 //++++                  VW_Hlin(end+1,scan->next->start,0,0);   // black = free
1332
1333                 //wwww=(dword)(scan->next->start)-(dword)scan->start;
1334                 //wwww=(dword)scan->start+(dword)(scan->next->start);
1335                 if (scan->next && scan->next->start >= end+1)
1336                 {
1337                         strcat(scratch0, AARESET);
1338                         //++==++==optional strcat(scratch0, "\n");
1339                         strcat(scratch0,AAGREEN);
1340                         for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
1341                         //for(w=(wwww)/80;w<=((end+1)/80);w++)
1342                         //for(w=(end+1)/80;w<=((wwww)/80);w++)
1343                         {
1344                                 //printf("0     %x      %u      %lu\n", scan->next->start, w, scan->length);
1345                                 strcat(scratch0,"0");
1346                         }
1347                         //printf("==================\n");
1348                         //printf("w=%u  wwww=%lu        start=%04x      next=%04x       end=%lu\n", w/80, wwww/80, scan->start, (scan->next->start), end+1);
1349                         //printf("==================\n");
1350                         strcat(scratch0, "\n");
1351                         //getch();
1352                 }/*else {//if(scan->next->start <= scan->start){
1353                         scan->next->start=scan->start+0x1000;
1354                         wwww=(dword)(scan->next->start)-(dword)scan->start;
1355                         strcat(scratch0, AARESET);
1356                         strcat(scratch0, "\n");
1357                         strcat(scratch0,AAGREEN);
1358                         for(w=(end+1);w<=(0x1000/80);w++)
1359                         {
1360                                 //printf("0     %x      %x      %u\n", scan->start, w);
1361                                 strcat(scratch0,"0");
1362                         }
1363                         printf("================\n");
1364                         printf("w=%x    start=%x        next=%x end=%u  %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1365                         printf("================\n");
1366                         getch();
1367                 }*/
1368                 strcat(scratch0, AARESET);
1369                 //strcat(scratch0,"\n");
1370                         //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1371                         //{
1372 //                              chx+=scan->next->start;
1373 //                              modexClearRegion(page, chx, chy, 4, 4, 2);
1374                         //}
1375                                         //modexhlin(page, end+1,scan->next->start, chy, 0);
1376 /*              y = scan->start/320;
1377                 x = scan->start%320;
1378                 VW_Hlin(x,x+end,y,color);
1379                 VW_Plot(x,y,15);*/
1380 //++++                  VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1381                 strcat(scratch,"Seg:");
1382                 ultoa (scan->start,str,16);
1383                 strcat (scratch,str);
1384                 strcat (scratch,"\tSize:");
1385                 ultoa ((unsigned)scan->length,str,10);
1386                 strcat (scratch,str);
1387                 strcat (scratch,"\tOwner:0x");
1388                 owner = (unsigned)scan->useptr;
1389                 ultoa (owner,str,16);
1390                 strcat (scratch,str);
1391                 strcat (scratch,"\n");
1392                 write(gvar->handle.debughandle,scratch,strlen(scratch));
1393                 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1394 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1395 //++++chy+=4;
1396 //fprintf(stdout, "%s", scratch);
1397
1398                 scan = scan->next;
1399         }
1400         /*strcpy(scratch1, AARESET);
1401         strcat(scratch1, "========================================\n");
1402         strcat(scratch1, "near=  ");
1403         ultoa (*(gvar->mm.nearheap),str,10);
1404         strcat (scratch1,str);
1405         strcat(scratch1, "      far= ");
1406         ultoa (*(gvar->mm.farheap),str,10);
1407         strcat (scratch1,str);
1408         strcat(scratch1, "\n");
1409         //strcat(scratch1, "&near=      %Fp ", &(gvar->mm.nearheap));
1410         //strcat(scratch1, "&far=       %Fp", &(gvar->mm.farheap));
1411         //strcat(scratch1, "\n");
1412         strcat(scratch1, "========================================\n");
1413         write(gvar->handle.debughandle,scratch1,strlen(scratch1));*/
1414
1415
1416         CA_CloseDebug (gvar);
1417
1418 //++++mh        IN_Ack();
1419 //****  VW_SetLineWidth(64);
1420 //++++mh        bufferofs = temp;
1421 }
1422
1423 //==========================================================================
1424
1425 /*
1426 =====================
1427 =
1428 = MM_DumpData
1429 =
1430 =====================
1431 */
1432
1433 void MM_DumpData(global_game_variables_t *gvar)
1434 {
1435         mmblocktype far *scan,far *best;
1436         long    lowest,oldlowest;
1437         word    owner;
1438         byte    lock,purge;
1439         FILE    *dumpfile;
1440
1441         free(gvar->mm.nearheap);
1442 #ifdef __BORLANDC__
1443                 dumpfile = fopen ("mmdump.16b","w");
1444 #endif
1445 #ifdef __WATCOMC__
1446                 dumpfile = fopen ("mmdump.16w","w");
1447 #endif
1448         if (!dumpfile){
1449                 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1450                 return;
1451         }
1452
1453         lowest = -1;
1454         do
1455         {
1456                 oldlowest = lowest;
1457                 lowest = 0xffff;
1458
1459                 scan = gvar->mm.mmhead;
1460                 while (scan)
1461                 {
1462                         owner = (unsigned)scan->useptr;
1463
1464                         if (owner && owner<lowest && owner > oldlowest)
1465                         {
1466                                 best = scan;
1467                                 lowest = owner;
1468                         }
1469
1470                         scan = scan->next;
1471                 }
1472
1473                 if (lowest != 0xffff)
1474                 {
1475                         if (best->attributes & PURGEBITS)
1476                                 purge = 'P';
1477                         else
1478                                 purge = '-';
1479                         if (best->attributes & LOCKBIT)
1480                                 lock = 'L';
1481                         else
1482                                 lock = '-';
1483                         fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1484                         ,(unsigned)lowest,lock,purge,best->length);
1485                 }
1486
1487         } while (lowest != 0xffff);
1488
1489         fclose(dumpfile);
1490         printf("MMDUMP.16 created.\n");
1491 }
1492
1493 //==========================================================================
1494
1495
1496 /*
1497 ======================
1498 =
1499 = MM_UnusedMemory
1500 =
1501 = Returns the total free space without purging
1502 =
1503 ======================
1504 */
1505
1506 dword MM_UnusedMemory(global_game_variables_t *gvar)
1507 {
1508         dword free;
1509         mmblocktype far *scan;
1510
1511         free = 0;
1512         scan = gvar->mm.mmhead;
1513
1514         while(scan->next)
1515         {
1516                 free += scan->next->start - (scan->start + scan->length);
1517                 scan = scan->next;
1518         }
1519
1520         return free*16lu;
1521 //      return free;
1522 }
1523
1524 //==========================================================================
1525
1526
1527 /*
1528 ======================
1529 =
1530 = MM_TotalFree
1531 =
1532 = Returns the total free space with purging
1533 =
1534 ======================
1535 */
1536
1537 dword MM_TotalFree(global_game_variables_t *gvar)
1538 {
1539         dword free;
1540         mmblocktype far *scan;
1541
1542         free = 0;
1543         scan = gvar->mm.mmhead;
1544
1545         while(scan->next)
1546         {
1547                 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1548                         free += scan->length;
1549                 free += scan->next->start - (scan->start + scan->length);
1550                 scan = scan->next;
1551         }
1552
1553         return free*16lu;
1554 //      return free;
1555 }
1556
1557 //==========================================================================
1558
1559 /*
1560 =====================
1561 =
1562 = MM_Report
1563 =
1564 =====================
1565 */
1566
1567 void MM_Report_(global_game_variables_t *gvar)
1568 {
1569         printf("========================================\n");
1570         printf("                MM_Report_\n");
1571         printf("========================================\n");
1572         if(MML_CheckForEMS())
1573         {
1574                 printf("        %cLIMEMS        %u\n", 0xC9, gvar->pm.emm.EMSPresent);
1575                 printf("        %c%cEMM v%x.%x available\n", 0xC7, 0xC4, gvar->pm.emm.EMSVer>>4,gvar->pm.emm.EMSVer&0x0F);
1576                 printf("        %c%ctotalEMSpages:      %u      ", 0xC7, 0xC4, gvar->pm.emm.totalEMSpages); printf("freeEMSpages:       %u\n", gvar->pm.emm.freeEMSpages);
1577                 printf("        %c%cEMSPageFrame:       %04x\n", 0xC7, 0xC4, gvar->pm.emm.EMSPageFrame);
1578                 printf("        %c%cEMSmem:     %lu\n", 0xD3, 0xC4, gvar->mmi.EMSmem);
1579         }
1580         if(MML_CheckForXMS())
1581         {
1582                 printf("        %cXMS   %u\n", 0xC9, gvar->pm.xmm.XMSPresent);
1583                 printf("        %c%cXMS v%x.%x available\n", 0xC7, 0xC4, XMSVer>>8,XMSVer&0x0F);
1584                 printf("        %c%cXMSDriver:  %Fp\n", 0xC7, 0xC4, XMSDriver);
1585                 printf("        %c%cXMSHandle:  %04x\n", 0xC7, 0xC4, gvar->pm.xmm.XMSHandle);
1586                 printf("        %c%cXMSmem:     %lu\n", 0xD3, 0xC4, gvar->mmi.XMSmem);
1587         }
1588         printf("        %cConv. %u\n", 0xC9, gvar->pm.mm.MainPresent); DebugMemory_(gvar, 0);
1589         //printf("mainmem:      %lu\n", gvar->mmi.mainmem);
1590         //printf("Total convmem:        %lu     ", gvar->mmi.mainmem); printf("TotalFree:       %lu     ", MM_TotalFree(gvar)+gvar->mmi.EMSmem+gvar->mmi.XMSmem+gvar->mmi.XMSmem); printf("TotalUsed:   %lu\n", gvar->mmi.mainmem);
1591         //printf("                      UnusedMemory:   %lu\n", MM_UnusedMemory(gvar));
1592         printf("nearheap:       %lu             ", gvar->mmi.nearheap); printf("farheap:        %lu\n", gvar->mmi.farheap);
1593 }
1594
1595 //==========================================================================
1596
1597 /*
1598 =====================
1599 =
1600 = MM_EMSerr
1601 =
1602 =====================
1603 */
1604
1605 void MM_EMSerr(byte *stri, byte err)
1606 {
1607         //Returns a text string describing the error code in EMS.Error.
1608         switch(err)
1609         {
1610                 case 0x0:
1611                         strcat(stri, "successful");
1612                 break;
1613                 case 0x80:
1614                         strcat(stri, "internal error");
1615                 break;
1616                 case 0x81:
1617                         strcat(stri, "hardware malfunction");
1618                 break;
1619                 case 0x82:
1620                         strcat(stri, "busy .. retry later");
1621                 break;
1622                 case 0x83:
1623                         strcat(stri, "invalid handle");
1624                 break;
1625                 case 0x84:
1626                         strcat(stri, "undefined function requested by application");
1627                 break;
1628                 case 0x85:
1629                         strcat(stri, "no more handles available");
1630                 break;
1631                 case 0x86:
1632                         strcat(stri, "error in save or restore of mapping context");
1633                 break;
1634                 case 0x87:
1635                         strcat(stri, "insufficient memory pages in system");
1636                 break;
1637                 case 0x88:
1638                         strcat(stri, "insufficient memory pages available");
1639                 break;
1640                 case 0x89:
1641                         strcat(stri, "zero pages requested");
1642                 break;
1643                 case 0x8A:
1644                         strcat(stri, "invalid logical page number encountered");
1645                 break;
1646                 case 0x8B:
1647                         strcat(stri, "invalid physical page number encountered");
1648                 break;
1649                 case 0x8C:
1650                         strcat(stri, "page-mapping hardware state save area is full");
1651                 break;
1652                 case 0x8D:
1653                         strcat(stri, "save of mapping context failed");
1654                 break;
1655                 case 0x8E:
1656                         strcat(stri, "restore of mapping context failed");
1657                 break;
1658                 case 0x8F:
1659                         strcat(stri, "undefined subfunction");
1660                 break;
1661                 case 0x90:
1662                         strcat(stri, "undefined attribute type");
1663                 break;
1664                 case 0x91:
1665                         strcat(stri, "feature not supported");
1666                 break;
1667                 case 0x92:
1668                         strcat(stri, "successful, but a portion of the source region has been overwritten");
1669                 break;
1670                 case 0x93:
1671                         strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1672                 break;
1673                 case 0x94:
1674                         strcat(stri, "conventional and expanded memory regions overlap");
1675                 break;
1676                 case 0x95:
1677                         strcat(stri, "offset within logical page exceeds size of logical page");
1678                 break;
1679                 case 0x96:
1680                         strcat(stri, "region length exceeds 1 MB");
1681                 break;
1682                 case 0x97:
1683                         strcat(stri, "source and destination EMS regions have same handle and overlap");
1684                 break;
1685                 case 0x98:
1686                         strcat(stri, "memory source or destination type undefined");
1687                 break;
1688                 case 0x9A:
1689                         strcat(stri, "specified alternate map register or DMA register set not supported");
1690                 break;
1691                 case 0x9B:
1692                         strcat(stri, "all alternate map register or DMA register sets currently allocated");
1693                 break;
1694                 case 0x9C:
1695                         strcat(stri, "alternate map register or DMA register sets not supported");
1696                 break;
1697                 case 0x9D:
1698                         strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1699                 break;
1700                 case 0x9E:
1701                         strcat(stri, "dedicated DMA channels not supported");
1702                 break;
1703                 case 0x9F:
1704                         strcat(stri, "specified dedicated DMA channel not supported");
1705                 break;
1706                 case 0xA0:
1707                         strcat(stri, "no such handle name");
1708                 break;
1709                 case 0xA1:
1710                         strcat(stri, "a handle found had no name, or duplicate handle name");
1711                 break;
1712                 case 0xA2:
1713                         strcat(stri, "attempted to wrap around 1M conventional address space");
1714                 break;
1715                 case 0xA3:
1716                         strcat(stri, "source array corrupted");
1717                 break;
1718                 case 0xA4:
1719                         strcat(stri, "operating system denied access");
1720                 break;
1721                 default:
1722                         strcat(stri, "undefined error");
1723         }
1724 }
1725
1726 //==========================================================================
1727
1728 /*
1729 =====================
1730 =
1731 = MM_BombOnError
1732 =
1733 =====================
1734 */
1735
1736 void MM_BombOnError(boolean bomb, global_game_variables_t *gvar)
1737 {
1738         gvar->mm.bombonerror = bomb;
1739 }
1740
1741 /*void MM_GetNewBlock(global_game_variables_t *gvar)
1742 {
1743         if(!gvar->mm.mmfree)
1744                 MML_ClearBlock(gvar);
1745         gvar->mm.mmnew=gvar->mm.mmfree;
1746         gvar->mm.mmfree=gvar->mm.mmfree->next;
1747         if(!(gvar->mm.mmnew=gvar->mm.mmfree))
1748         {
1749                 printf("MM_GETNEWBLOCK: No free blocks!\n");
1750                 return;
1751         }
1752         gvar->mm.mmfree=gvar->mm.mmfree->next;
1753 }
1754
1755 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
1756 {
1757         x->useptr=NULL;
1758         x->next=gvar->mm.mmfree;
1759         gvar->mm.mmfree=x;
1760 }*/
1761
1762 void xms_call(byte v, global_game_variables_t *gvar)
1763 {
1764         dword XMSDriver = gvar->pm.xmm.XMSDriver;
1765         __asm {
1766                 mov     ah,[v]
1767                 call [DWORD PTR XMSDriver]
1768         }
1769 }
1770
1771 /*void MM_seguin(void)
1772 {
1773         __asm {
1774                 push    ds
1775                 mov     ax,ds
1776                 inc             ax
1777                 mov     ds,ax
1778         }
1779 }
1780
1781 void MM_segude(void)
1782 {
1783         __asm {
1784                 pop ds
1785         }
1786 }*/
1787
1788 /*
1789 pull data from far and put it into ds var
1790 mov ax,es:si
1791 mov x,ax
1792 */
1793 /*
1794 ss stack segment
1795 sp top of stack
1796 bp bottem of stack
1797 */