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 #endif
 791
 792         length=(word)_memavl();//(word)coreleft();//(dword)GetFreeSize();
 793
 794 #ifdef __WATCOMC__
 795         start = (void __far *)(gvar->mm.nearheap = _nmalloc(length));
 796 #endif
 797 #ifdef __BORLANDC__
 798         start = (void far *)(gvar->mm.nearheap = malloc(length));
 799 #endif
 800         length -= 16-(FP_OFF(start)&15);
 801         length -= SAVENEARHEAP;
 802         seglength = length / 16;                        // now in paragraphs
 803         segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
 804         MML_UseSpace(segstart,seglength, gvar);
 805         gvar->mmi.nearheap = length;
 806         //0000printf("near:     start=%Fp       segstart=%x     seglen=%lu      len=%lu\n", start, segstart, (dword)seglength, length);
 807
 808 //
 809 // get all available far conventional memory segments
 810 //
 811         //printf("_FARCORELEFT                          %lu\n", _FCORELEFT);
 812 #ifdef __WATCOMC__
 813         _fheapgrow();
 814         length=_FCORELEFT;//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
 815 #endif
 816 #ifdef __BORLANDC__
 817 //0000  printf("farcoreleft()                           %lu\n", farcoreleft());
 818 //0000  printf("(farcoreleft()+32)-_FCORELEFT   %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
 819         length=farcoreleft();//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
 820 #endif
 821         start = gvar->mm.farheap = _fmalloc(length);
 822         //start = gvar->mm.farheap = halloc(length, 1);
 823         length -= 16-(FP_OFF(start)&15);
 824         length -= SAVEFARHEAP;
 825         seglength = length / 16;                        // now in paragraphs
 826         segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
 827         MML_UseSpace(segstart,seglength, gvar);
 828         gvar->mmi.farheap = length;
 829         //0000printf("far:      start=%Fp       segstart=%x     seglen=%lu      len=%lu\n", start, segstart, (dword)seglength, length);
 830
 831         gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
 832
 833 #if !defined(__16_PM__)// && defined(__WATCOMC__)
 834         if(!dbg_debugpm) {
 835 //
 836 // detect EMS and allocate up to 64K at page frame
 837 //
 838         gvar->mmi.EMSmem = 0;
 839 //goto emsskip; //0000
 840         for(i = 1;i < _argc;i++)
 841         {
 842                 if(US_CheckParm(_argv[i],ParmStringsexmm) == 0)
 843                         goto emsskip;                           // param NOEMS
 844         }
 845         if(MML_CheckForEMS())
 846         {
 847                 MML_SetupEMS(gvar);                                     // allocate space
 848                 //16_PM: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
 849                 MML_UseSpace(gvar->mm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);
 850                 //if(gvar->pm.emm.EMSVer<0x40)
 851                         MM_MapEMS(gvar);                                        // map in used pages
 852                 //else
 853                         //MM_MapXEMS(gvar);                                     // map in used pages
 854         }
 855
 856 //
 857 // detect XMS and get upper memory blocks
 858 //
 859 emsskip:
 860         gvar->mmi.XMSmem = 0;
 861 goto xmsskip;//0000
 862         for(i = 1;i < _argc;i++)
 863         {
 864                 if(US_CheckParm( _argv[i],ParmStringsexmm) == 0)
 865                         goto xmsskip;                           // param NOXMS
 866         }
 867         if(MML_CheckForXMS())
 868         {
 869                 MML_SetupXMS(gvar);                                     // allocate as many UMBs as possible
 870         }
 871
 872         }
 873 xmsskip:
 874 #endif
 875 //
 876 // allocate the misc buffer
 877 //
 878         gvar->mm.mmrover = gvar->mm.mmhead;             // start looking for space after low block
 879
 880         MM_GetPtr(&(gvar->mm.bufferseg),BUFFERSIZE, gvar);
 881 }
 882
 883 //==========================================================================
 884
 885 /*
 886 ====================
 887 =
 888 = MM_Shutdown
 889 =
 890 = Frees all conventional, EMS, and XMS allocated
 891 =
 892 ====================
 893 */
 894
 895 void MM_Shutdown(global_game_variables_t *gvar)
 896 {
 897         if(!(gvar->mm.mmstarted))
 898                 return;
 899
 900         _ffree(gvar->mm.farheap);//     printf("                far freed\n");
 901 #ifdef __WATCOMC__
 902         _nfree(gvar->mm.nearheap);//    printf("                near freed\n");
 903 #endif
 904 #ifdef __BORLANDC__
 905         free(gvar->mm.nearheap);//      printf("                near freed\n");
 906 #endif
 907 #ifndef __16_PM__
 908 #ifdef __DEBUG__
 909         if(!dbg_debugpm) {
 910 #endif
 911         if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf("               EMS freed\n"); }
 912         if(MML_CheckForXMS()){ MML_ShutdownXMS(gvar); }//printf("               XMS freed\n"); }
 913 #ifdef __DEBUG__
 914         }
 915 #endif
 916 #endif
 917 }
 918
 919 //==========================================================================
 920
 921 /*
 922 ====================
 923 =
 924 = MM_GetPtr
 925 =
 926 = Allocates an unlocked, unpurgable block
 927 =
 928 ====================
 929 */
 930
 931 void MM_GetPtr (memptr *baseptr, dword size, global_game_variables_t *gvar)
 932 {
 933         mmblocktype far *scan,far *lastscan,far *endscan,far *purge,far *next;
 934         int                     search;
 935         unsigned        needed,startseg;
 936
 937         needed = (size+15)/16;          // convert size from bytes to paragraphs
 938
 939         GETNEWBLOCK;                            // fill in start and next after a spot is found
 940         gvar->mm.mmnew->length = needed;
 941         gvar->mm.mmnew->useptr = baseptr;
 942         //if(gvar->mm.mmnew->useptr==NULL){
 943 #ifdef __DEBUG_MM__
 944                 printf("MM_GetPtr\n");
 945                 //%04x
 946                 printf("        baseptr=%Fp     ", baseptr); printf("useptr=%Fp\n", gvar->mm.mmnew->useptr);
 947                 printf("        *baseptr=%Fp    ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
 948                 printf("        &baseptr=%Fp    ", &baseptr); printf("&useptr=%Fp\n", &(gvar->mm.mmnew->useptr));
 949 #endif
 950         //Quit(gvar, "gvar->mm.mmnew->useptr==NULL"); }
 951         gvar->mm.mmnew->attributes = BASEATTRIBUTES;
 952
 953 //tryagain:
 954         for (search = 0; search<3; search++)
 955         {
 956         //
 957         // first search:        try to allocate right after the rover, then on up
 958         // second search:       search from the head pointer up to the rover
 959         // third search:        compress memory, then scan from start
 960                 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)
 961                         search++;
 962
 963                 switch (search)
 964                 {
 965                 case 0:
 966                         lastscan = gvar->mm.mmrover;
 967                         scan = gvar->mm.mmrover->next;
 968                         endscan = NULL;
 969                         break;
 970                 case 1:
 971                         lastscan = gvar->mm.mmhead;
 972                         scan = gvar->mm.mmhead->next;
 973                         endscan = gvar->mm.mmrover;
 974                         break;
 975                 case 2:
 976                         MM_SortMem (gvar);
 977                         lastscan = gvar->mm.mmhead;
 978                         scan = gvar->mm.mmhead->next;
 979                         endscan = NULL;
 980                         break;
 981                 }
 982
 983                 startseg = lastscan->start + lastscan->length;
 984
 985                 while (scan != endscan)
 986                 {
 987                         if (scan->start - startseg >= needed)
 988                         {
 989                         //
 990                         // got enough space between the end of lastscan and
 991                         // the start of scan, so throw out anything in the middle
 992                         // and allocate the new block
 993                         //
 994                                 purge = lastscan->next;
 995                                 lastscan->next = gvar->mm.mmnew;
 996                                 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;
 997                                 gvar->mm.mmnew->next = scan;
 998                                 while ( purge != scan)
 999                                 {       // free the purgable block
1000                                         next = purge->next;
1001                                         FREEBLOCK(purge);
1002                                         purge = next;           // purge another if not at scan
1003                                 }
1004                                 gvar->mm.mmrover = gvar->mm.mmnew;
1005                                 return; // good allocation!
1006                         }
1007
1008                         //
1009                         // if this block is purge level zero or locked, skip past it
1010                         //
1011                         if ( (scan->attributes & LOCKBIT)
1012                                 || !(scan->attributes & PURGEBITS) )
1013                         {
1014                                 lastscan = scan;
1015                                 startseg = lastscan->start + lastscan->length;
1016                         }
1017
1018
1019                         scan=scan->next;                // look at next line
1020                 }
1021         }
1022
1023         if (gvar->mm.bombonerror)
1024         {
1025 #ifdef __WATCOMC__
1026                 //heapdump();
1027 #endif
1028                 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));
1029                 Quit(gvar, "for stability reasons the program will shut down! wwww\n");
1030         }
1031         else
1032                 gvar->mm.mmerror = true;
1033 }
1034
1035 //==========================================================================
1036
1037 /*
1038 ====================
1039 =
1040 = MM_FreePtr
1041 =
1042 = Allocates an unlocked, unpurgable block
1043 =
1044 ====================
1045 */
1046
1047 void MM_FreePtr(memptr *baseptr, global_game_variables_t *gvar)
1048 {
1049         mmblocktype far *scan,far *last;
1050
1051         last = gvar->mm.mmhead;
1052         scan = last->next;
1053
1054         if(baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
1055                 gvar->mm.mmrover = gvar->mm.mmhead;
1056
1057         while(scan->useptr != baseptr && scan)
1058         {
1059                 last = scan;
1060                 scan = scan->next;
1061         }
1062
1063         if(!scan)
1064         {
1065                 printf("MM_FreePtr: Block not found!\n");
1066                 return;
1067         }
1068
1069         last->next = scan->next;
1070
1071         FREEBLOCK(scan);
1072 }
1073 //==========================================================================
1074
1075 /*
1076 =====================
1077 =
1078 = MM_SetPurge
1079 =
1080 = Sets the purge level for a block (locked blocks cannot be made purgable)
1081 =
1082 =====================
1083 */
1084
1085
1086 void MM_SetPurge(memptr *baseptr, int purge, global_game_variables_t *gvar)
1087 {
1088         mmblocktype far *start;
1089
1090         start = gvar->mm.mmrover;
1091
1092         do
1093         {
1094                 if(gvar->mm.mmrover->useptr == baseptr)
1095                         break;
1096
1097                 gvar->mm.mmrover = gvar->mm.mmrover->next;
1098
1099                 if(!gvar->mm.mmrover)
1100                         gvar->mm.mmrover = gvar->mm.mmhead;
1101                 else if(gvar->mm.mmrover == start)
1102                 {
1103                         Quit (gvar, "MM_SetPurge: Block not found!");
1104                         //return;
1105                 }
1106
1107         } while(1);
1108
1109         gvar->mm.mmrover->attributes &= ~PURGEBITS;
1110         gvar->mm.mmrover->attributes |= purge;
1111 }
1112
1113 //==========================================================================
1114
1115 /*
1116 =====================
1117 =
1118 = MM_SetLock
1119 =
1120 = Locks / unlocks the block
1121 =
1122 =====================
1123 */
1124
1125 void MM_SetLock(memptr *baseptr, boolean locked, global_game_variables_t *gvar)
1126 {
1127         mmblocktype far *start;
1128
1129         start = gvar->mm.mmrover;
1130
1131         do
1132         {
1133                 if(gvar->mm.mmrover->useptr == baseptr)
1134                         break;
1135
1136                 gvar->mm.mmrover = gvar->mm.mmrover->next;
1137
1138                 if(!gvar->mm.mmrover)
1139                         gvar->mm.mmrover = gvar->mm.mmhead;
1140                 else if(gvar->mm.mmrover == start)
1141                 {
1142                         Quit (gvar, "MM_SetLock: Block not found!");
1143                         //return;
1144                 }
1145
1146         } while(1);
1147
1148         gvar->mm.mmrover->attributes &= ~LOCKBIT;
1149         gvar->mm.mmrover->attributes |= locked*LOCKBIT;
1150 }
1151
1152 //==========================================================================
1153
1154 /*
1155 =====================
1156 =
1157 = MM_SortMem
1158 =
1159 = Throws out all purgable stuff and compresses movable blocks
1160 =
1161 =====================
1162 */
1163
1164 void MM_SortMem(global_game_variables_t *gvar)
1165 {
1166         mmblocktype far *scan,far *last,far *next;
1167         unsigned        start,length,source,dest;//++++,oldborder;
1168         //++++int                       playing;
1169
1170         //
1171         // lock down a currently playing sound
1172         //
1173 /*++++  playing = SD_SoundPlaying ();
1174         if(playing)
1175         {
1176                 switch (SoundMode)
1177                 {
1178                 case sdm_PC:
1179                         playing += STARTPCSOUNDS;
1180                         break;
1181                 case sdm_AdLib:
1182                         playing += STARTADLIBSOUNDS;
1183                         break;
1184                 }
1185                 MM_SetLock(&(memptr)audiosegs[playing],true);
1186         }
1187
1188
1189         SD_StopSound();*/
1190 //      oldborder = bordercolor;
1191 //      VW_ColorBorder (15);
1192
1193         if(beforesort)
1194                 beforesort();
1195
1196         scan = gvar->mm.mmhead;
1197
1198         last = NULL;            // shut up compiler warning
1199
1200         while(scan)
1201         {
1202                 if(scan->attributes & LOCKBIT)
1203                 {
1204                 //
1205                 // block is locked, so try to pile later blocks right after it
1206                 //
1207                         start = scan->start + scan->length;
1208                 }
1209                 else
1210                 {
1211                         if(scan->attributes & PURGEBITS)
1212                         {
1213                         //
1214                         // throw out the purgable block
1215                         //
1216                                 next = scan->next;
1217                                 FREEBLOCK(scan);
1218                                 //MM_FreeBlock(scan, gvar);
1219                                 last->next = next;
1220                                 scan = next;
1221                                 continue;
1222                         }
1223                         else
1224                         {
1225                         //
1226                         // push the non purgable block on top of the last moved block
1227                         //
1228                                 if(scan->start != start)
1229                                 {
1230                                         length = scan->length;
1231                                         source = scan->start;
1232                                         dest = start;
1233                                         while(length > 0xf00)
1234                                         {
1235                                                 movedata(source,0,dest,0,0xf00*16);
1236                                                 length -= 0xf00;
1237                                                 source += 0xf00;
1238                                                 dest += 0xf00;
1239                                         }
1240                                         movedata(source,0,dest,0,length*16);
1241
1242                                         scan->start = start;
1243                                         *(unsigned *)scan->useptr = start;
1244                                 }
1245                                 start = scan->start + scan->length;
1246                         }
1247                 }
1248
1249                 last = scan;
1250                 scan = scan->next;              // go to next block
1251         }
1252
1253         gvar->mm.mmrover = gvar->mm.mmhead;
1254
1255         if(aftersort)
1256                 aftersort();
1257
1258 //      VW_ColorBorder (oldborder);
1259
1260 /*++++  if(playing)
1261                 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1262 }
1263
1264 //==========================================================================
1265
1266 /*
1267 =====================
1268 =
1269 = MM_ShowMemory
1270 =
1271 =====================
1272 */
1273
1274 void MM_ShowMemory(global_game_variables_t *gvar)
1275 {
1276         mmblocktype far *scan;
1277         //word temp;
1278         sdword  end,owner;
1279         //word chx,chy;
1280         word w;
1281         //dword wwww;
1282         byte    scratch[160],scratch0[4096],str[16];//[[[[scratch1[160],
1283         //byte d = '#';
1284 //[[[[  VW_SetDefaultColors();
1285 //[[[[  VW_SetLineWidth(40);
1286 //++++mh        temp = bufferofs;
1287 //++++mh        bufferofs = 0;
1288 //[[[[  VW_SetScreen (0,0);
1289         scan = gvar->mm.mmhead;
1290         end = -1;
1291
1292         CA_OpenDebug (gvar);
1293         w=0;
1294         while(scan)
1295         {
1296                 strcpy(scratch, AARESET);
1297                 if(scan->attributes & PURGEBITS)
1298                         strcpy(scratch0, AAMAGENTA);            // dark purple = purgable
1299                 else
1300                         strcpy(scratch0, AABLUE);               // medium blue = non purgable
1301                 if(scan->attributes & LOCKBIT)
1302                         strcpy(scratch0, AARED);                // red = locked
1303                 if(scan->start<=end)
1304                 {
1305                         printf("\nend==%d\n\n", end);
1306                         strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
1307                         strcat(scratch, "End's Size: ");
1308                         ultoa (end,str,10);
1309                         strcat (scratch,str);
1310                         strcat(scratch, "\nscan->start's Size: ");
1311                         ultoa (scan->start,str,10);
1312                         strcat (scratch,str);
1313                         write(gvar->handle.debughandle,scratch,strlen(scratch));
1314                         //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
1315                         break;
1316                 }
1317                 end = scan->start+(scan->length)-1;
1318 //++++          chy = scan->start/320;
1319 //++++          chx = scan->start%320;
1320                                 //modexhlin(page, scan->start, (unsigned)end, chy, color);
1321                                 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
1322                                 //{
1323 //++++                                  modexClearRegion(page, chx, chy, 4, 4, color);
1324                                 //}
1325 //++++          VW_Hlin(scan->start,(unsigned)end,0,color);
1326                 for(w=(scan->start)/80;w<=end/80;w++)
1327                 {
1328                         //printf("+     %u      %lu\n", w, scan->length);
1329                         strcat(scratch0, "+");
1330                 }
1331                 //++==++==optional strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
1332 //++++          VW_Plot(scan->start,0,15);
1333 //++++                          modexClearRegion(page, chx, chy, 4, 4, 15);
1334 //++++                  VW_Hlin(end+1,scan->next->start,0,0);   // black = free
1335
1336                 //wwww=(dword)(scan->next->start)-(dword)scan->start;
1337                 //wwww=(dword)scan->start+(dword)(scan->next->start);
1338                 if (scan->next && scan->next->start >= end+1)
1339                 {
1340                         strcat(scratch0, AARESET);
1341                         //++==++==optional strcat(scratch0, "\n");
1342                         strcat(scratch0,AAGREEN);
1343                         for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
1344                         //for(w=(wwww)/80;w<=((end+1)/80);w++)
1345                         //for(w=(end+1)/80;w<=((wwww)/80);w++)
1346                         {
1347                                 //printf("0     %x      %u      %lu\n", scan->next->start, w, scan->length);
1348                                 strcat(scratch0,"0");
1349                         }
1350                         //printf("==================\n");
1351                         //printf("w=%u  wwww=%lu        start=%04x      next=%04x       end=%lu\n", w/80, wwww/80, scan->start, (scan->next->start), end+1);
1352                         //printf("==================\n");
1353                         strcat(scratch0, "\n");
1354                         //getch();
1355                 }/*else {//if(scan->next->start <= scan->start){
1356                         scan->next->start=scan->start+0x1000;
1357                         wwww=(dword)(scan->next->start)-(dword)scan->start;
1358                         strcat(scratch0, AARESET);
1359                         strcat(scratch0, "\n");
1360                         strcat(scratch0,AAGREEN);
1361                         for(w=(end+1);w<=(0x1000/80);w++)
1362                         {
1363                                 //printf("0     %x      %x      %u\n", scan->start, w);
1364                                 strcat(scratch0,"0");
1365                         }
1366                         printf("================\n");
1367                         printf("w=%x    start=%x        next=%x end=%u  %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
1368                         printf("================\n");
1369                         getch();
1370                 }*/
1371                 strcat(scratch0, AARESET);
1372                 //strcat(scratch0,"\n");
1373                         //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
1374                         //{
1375 //                              chx+=scan->next->start;
1376 //                              modexClearRegion(page, chx, chy, 4, 4, 2);
1377                         //}
1378                                         //modexhlin(page, end+1,scan->next->start, chy, 0);
1379 /*              y = scan->start/320;
1380                 x = scan->start%320;
1381                 VW_Hlin(x,x+end,y,color);
1382                 VW_Plot(x,y,15);*/
1383 //++++                  VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
1384                 strcat(scratch,"Seg:");
1385                 ultoa (scan->start,str,16);
1386                 strcat (scratch,str);
1387                 strcat (scratch,"\tSize:");
1388                 ultoa ((unsigned)scan->length,str,10);
1389                 strcat (scratch,str);
1390                 strcat (scratch,"\tOwner:0x");
1391                 owner = (unsigned)scan->useptr;
1392                 ultoa (owner,str,16);
1393                 strcat (scratch,str);
1394                 strcat (scratch,"\n");
1395                 write(gvar->handle.debughandle,scratch,strlen(scratch));
1396                 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
1397 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
1398 //++++chy+=4;
1399 //fprintf(stdout, "%s", scratch);
1400
1401                 scan = scan->next;
1402         }
1403         /*strcpy(scratch1, AARESET);
1404         strcat(scratch1, "========================================\n");
1405         strcat(scratch1, "near=  ");
1406         ultoa (*(gvar->mm.nearheap),str,10);
1407         strcat (scratch1,str);
1408         strcat(scratch1, "      far= ");
1409         ultoa (*(gvar->mm.farheap),str,10);
1410         strcat (scratch1,str);
1411         strcat(scratch1, "\n");
1412         //strcat(scratch1, "&near=      %Fp ", &(gvar->mm.nearheap));
1413         //strcat(scratch1, "&far=       %Fp", &(gvar->mm.farheap));
1414         //strcat(scratch1, "\n");
1415         strcat(scratch1, "========================================\n");
1416         write(gvar->handle.debughandle,scratch1,strlen(scratch1));*/
1417
1418
1419         CA_CloseDebug (gvar);
1420
1421 //++++mh        IN_Ack();
1422 //****  VW_SetLineWidth(64);
1423 //++++mh        bufferofs = temp;
1424 }
1425
1426 //==========================================================================
1427
1428 /*
1429 =====================
1430 =
1431 = MM_DumpData
1432 =
1433 =====================
1434 */
1435
1436 void MM_DumpData(global_game_variables_t *gvar)
1437 {
1438         mmblocktype far *scan,far *best;
1439         long    lowest,oldlowest;
1440         word    owner;
1441         byte    lock,purge;
1442         FILE    *dumpfile;
1443
1444         free(gvar->mm.nearheap);
1445 #ifdef __BORLANDC__
1446                 dumpfile = fopen ("mmdump.16b","w");
1447 #endif
1448 #ifdef __WATCOMC__
1449                 dumpfile = fopen ("mmdump.16w","w");
1450 #endif
1451         if (!dumpfile){
1452                 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
1453                 return;
1454         }
1455
1456         lowest = -1;
1457         do
1458         {
1459                 oldlowest = lowest;
1460                 lowest = 0xffff;
1461
1462                 scan = gvar->mm.mmhead;
1463                 while (scan)
1464                 {
1465                         owner = (unsigned)scan->useptr;
1466
1467                         if (owner && owner<lowest && owner > oldlowest)
1468                         {
1469                                 best = scan;
1470                                 lowest = owner;
1471                         }
1472
1473                         scan = scan->next;
1474                 }
1475
1476                 if (lowest != 0xffff)
1477                 {
1478                         if (best->attributes & PURGEBITS)
1479                                 purge = 'P';
1480                         else
1481                                 purge = '-';
1482                         if (best->attributes & LOCKBIT)
1483                                 lock = 'L';
1484                         else
1485                                 lock = '-';
1486                         fprintf (dumpfile,"0x%p (%c%c) = %u\n"
1487                         ,(unsigned)lowest,lock,purge,best->length);
1488                 }
1489
1490         } while (lowest != 0xffff);
1491
1492         fclose(dumpfile);
1493         printf("MMDUMP.16 created.\n");
1494 }
1495
1496 //==========================================================================
1497
1498
1499 /*
1500 ======================
1501 =
1502 = MM_UnusedMemory
1503 =
1504 = Returns the total free space without purging
1505 =
1506 ======================
1507 */
1508
1509 dword MM_UnusedMemory(global_game_variables_t *gvar)
1510 {
1511         dword free;
1512         mmblocktype far *scan;
1513
1514         free = 0;
1515         scan = gvar->mm.mmhead;
1516
1517         while(scan->next)
1518         {
1519                 free += scan->next->start - (scan->start + scan->length);
1520                 scan = scan->next;
1521         }
1522
1523         return free*16lu;
1524 //      return free;
1525 }
1526
1527 //==========================================================================
1528
1529
1530 /*
1531 ======================
1532 =
1533 = MM_TotalFree
1534 =
1535 = Returns the total free space with purging
1536 =
1537 ======================
1538 */
1539
1540 dword MM_TotalFree(global_game_variables_t *gvar)
1541 {
1542         dword free;
1543         mmblocktype far *scan;
1544
1545         free = 0;
1546         scan = gvar->mm.mmhead;
1547
1548         while(scan->next)
1549         {
1550                 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1551                         free += scan->length;
1552                 free += scan->next->start - (scan->start + scan->length);
1553                 scan = scan->next;
1554         }
1555
1556         return free*16lu;
1557 //      return free;
1558 }
1559
1560 //==========================================================================
1561
1562 /*
1563 =====================
1564 =
1565 = MM_Report
1566 =
1567 =====================
1568 */
1569
1570 void MM_Report_(global_game_variables_t *gvar)
1571 {
1572         printf("========================================\n");
1573         printf("                MM_Report_\n");
1574         printf("========================================\n");
1575         if(MML_CheckForEMS())
1576         {
1577                 printf("        %cLIMEMS        %u\n", 0xC9, gvar->pm.emm.EMSPresent);
1578                 printf("        %c%cEMM v%x.%x available\n", 0xC7, 0xC4, gvar->pm.emm.EMSVer>>4,gvar->pm.emm.EMSVer&0x0F);
1579                 printf("        %c%ctotalEMSpages:      %u      ", 0xC7, 0xC4, gvar->pm.emm.totalEMSpages); printf("freeEMSpages:       %u\n", gvar->pm.emm.freeEMSpages);
1580                 printf("        %c%cEMSPageFrame:       %04x\n", 0xC7, 0xC4, gvar->pm.emm.EMSPageFrame);
1581                 printf("        %c%cEMSmem:     %lu\n", 0xD3, 0xC4, gvar->mmi.EMSmem);
1582         }
1583         if(MML_CheckForXMS())
1584         {
1585                 printf("        %cXMS   %u\n", 0xC9, gvar->pm.xmm.XMSPresent);
1586                 printf("        %c%cXMS v%x.%x available\n", 0xC7, 0xC4, XMSVer>>8,XMSVer&0x0F);
1587                 printf("        %c%cXMSDriver:  %Fp\n", 0xC7, 0xC4, XMSDriver);
1588                 printf("        %c%cXMSHandle:  %04x\n", 0xC7, 0xC4, gvar->pm.xmm.XMSHandle);
1589                 printf("        %c%cXMSmem:     %lu\n", 0xD3, 0xC4, gvar->mmi.XMSmem);
1590         }
1591         printf("        %cConv. %u\n", 0xC9, gvar->pm.mm.MainPresent); DebugMemory_(gvar, 0);
1592         //printf("mainmem:      %lu\n", gvar->mmi.mainmem);
1593         //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);
1594         //printf("                      UnusedMemory:   %lu\n", MM_UnusedMemory(gvar));
1595         printf("nearheap:       %lu             ", gvar->mmi.nearheap); printf("farheap:        %lu\n", gvar->mmi.farheap);
1596 }
1597
1598 //==========================================================================
1599
1600 /*
1601 =====================
1602 =
1603 = MM_EMSerr
1604 =
1605 =====================
1606 */
1607
1608 void MM_EMSerr(byte *stri, byte err)
1609 {
1610         //Returns a text string describing the error code in EMS.Error.
1611         switch(err)
1612         {
1613                 case 0x0:
1614                         strcat(stri, "successful");
1615                 break;
1616                 case 0x80:
1617                         strcat(stri, "internal error");
1618                 break;
1619                 case 0x81:
1620                         strcat(stri, "hardware malfunction");
1621                 break;
1622                 case 0x82:
1623                         strcat(stri, "busy .. retry later");
1624                 break;
1625                 case 0x83:
1626                         strcat(stri, "invalid handle");
1627                 break;
1628                 case 0x84:
1629                         strcat(stri, "undefined function requested by application");
1630                 break;
1631                 case 0x85:
1632                         strcat(stri, "no more handles available");
1633                 break;
1634                 case 0x86:
1635                         strcat(stri, "error in save or restore of mapping context");
1636                 break;
1637                 case 0x87:
1638                         strcat(stri, "insufficient memory pages in system");
1639                 break;
1640                 case 0x88:
1641                         strcat(stri, "insufficient memory pages available");
1642                 break;
1643                 case 0x89:
1644                         strcat(stri, "zero pages requested");
1645                 break;
1646                 case 0x8A:
1647                         strcat(stri, "invalid logical page number encountered");
1648                 break;
1649                 case 0x8B:
1650                         strcat(stri, "invalid physical page number encountered");
1651                 break;
1652                 case 0x8C:
1653                         strcat(stri, "page-mapping hardware state save area is full");
1654                 break;
1655                 case 0x8D:
1656                         strcat(stri, "save of mapping context failed");
1657                 break;
1658                 case 0x8E:
1659                         strcat(stri, "restore of mapping context failed");
1660                 break;
1661                 case 0x8F:
1662                         strcat(stri, "undefined subfunction");
1663                 break;
1664                 case 0x90:
1665                         strcat(stri, "undefined attribute type");
1666                 break;
1667                 case 0x91:
1668                         strcat(stri, "feature not supported");
1669                 break;
1670                 case 0x92:
1671                         strcat(stri, "successful, but a portion of the source region has been overwritten");
1672                 break;
1673                 case 0x93:
1674                         strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
1675                 break;
1676                 case 0x94:
1677                         strcat(stri, "conventional and expanded memory regions overlap");
1678                 break;
1679                 case 0x95:
1680                         strcat(stri, "offset within logical page exceeds size of logical page");
1681                 break;
1682                 case 0x96:
1683                         strcat(stri, "region length exceeds 1 MB");
1684                 break;
1685                 case 0x97:
1686                         strcat(stri, "source and destination EMS regions have same handle and overlap");
1687                 break;
1688                 case 0x98:
1689                         strcat(stri, "memory source or destination type undefined");
1690                 break;
1691                 case 0x9A:
1692                         strcat(stri, "specified alternate map register or DMA register set not supported");
1693                 break;
1694                 case 0x9B:
1695                         strcat(stri, "all alternate map register or DMA register sets currently allocated");
1696                 break;
1697                 case 0x9C:
1698                         strcat(stri, "alternate map register or DMA register sets not supported");
1699                 break;
1700                 case 0x9D:
1701                         strcat(stri, "undefined or unallocated alternate map register or DMA register set");
1702                 break;
1703                 case 0x9E:
1704                         strcat(stri, "dedicated DMA channels not supported");
1705                 break;
1706                 case 0x9F:
1707                         strcat(stri, "specified dedicated DMA channel not supported");
1708                 break;
1709                 case 0xA0:
1710                         strcat(stri, "no such handle name");
1711                 break;
1712                 case 0xA1:
1713                         strcat(stri, "a handle found had no name, or duplicate handle name");
1714                 break;
1715                 case 0xA2:
1716                         strcat(stri, "attempted to wrap around 1M conventional address space");
1717                 break;
1718                 case 0xA3:
1719                         strcat(stri, "source array corrupted");
1720                 break;
1721                 case 0xA4:
1722                         strcat(stri, "operating system denied access");
1723                 break;
1724                 default:
1725                         strcat(stri, "undefined error");
1726         }
1727 }
1728
1729 //==========================================================================
1730
1731 /*
1732 =====================
1733 =
1734 = MM_BombOnError
1735 =
1736 =====================
1737 */
1738
1739 void MM_BombOnError(boolean bomb, global_game_variables_t *gvar)
1740 {
1741         gvar->mm.bombonerror = bomb;
1742 }
1743
1744 /*void MM_GetNewBlock(global_game_variables_t *gvar)
1745 {
1746         if(!gvar->mm.mmfree)
1747                 MML_ClearBlock(gvar);
1748         gvar->mm.mmnew=gvar->mm.mmfree;
1749         gvar->mm.mmfree=gvar->mm.mmfree->next;
1750         if(!(gvar->mm.mmnew=gvar->mm.mmfree))
1751         {
1752                 printf("MM_GETNEWBLOCK: No free blocks!\n");
1753                 return;
1754         }
1755         gvar->mm.mmfree=gvar->mm.mmfree->next;
1756 }
1757
1758 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
1759 {
1760         x->useptr=NULL;
1761         x->next=gvar->mm.mmfree;
1762         gvar->mm.mmfree=x;
1763 }*/
1764
1765 void xms_call(byte v, global_game_variables_t *gvar)
1766 {
1767         dword XMSDriver = gvar->pm.xmm.XMSDriver;
1768         __asm {
1769                 mov     ah,[v]
1770                 call [DWORD PTR XMSDriver]
1771         }
1772 }
1773
1774 /*void MM_seguin(void)
1775 {
1776         __asm {
1777                 push    ds
1778                 mov     ax,ds
1779                 inc             ax
1780                 mov     ds,ax
1781         }
1782 }
1783
1784 void MM_segude(void)
1785 {
1786         __asm {
1787                 pop ds
1788         }
1789 }*/
1790
1791 /*
1792 pull data from far and put it into ds var
1793 mov ax,es:si
1794 mov x,ax
1795 */
1796 /*
1797 ss stack segment
1798 sp top of stack
1799 bp bottem of stack
1800 */