src/lib/16_mm.c

   1 /* Project 16 Source Code~\r
   2  * Copyright (C) 2012-2017 sparky4 & pngwen & andrius4669 & joncampbell123 & yakui-lover\r
   3  *\r
   4  * This file is part of Project 16.\r
   5  *\r
   6  * Project 16 is free software; you can redistribute it and/or modify\r
   7  * it under the terms of the GNU General Public License as published by\r
   8  * the Free Software Foundation; either version 3 of the License, or\r
   9  * (at your option) any later version.\r
  10  *\r
  11  * Project 16 is distributed in the hope that it will be useful,\r
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14  * GNU General Public License for more details.\r
  15  *\r
  16  * You should have received a copy of the GNU General Public License\r
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>, or\r
  18  * write to the Free Software Foundation, Inc., 51 Franklin Street,\r
  19  * Fifth Floor, Boston, MA 02110-1301 USA.\r
  20  *\r
  21  */\r
  22 \r
  23 // NEWMM.C\r
  24 \r
  25 /*\r
  26 =============================================================================\r
  27 \r
  28                         ID software memory manager\r
  29                         --------------------------\r
  30 \r
  31 Primary coder: John Carmack\r
  32 \r
  33 RELIES ON\r
  34 ---------\r
  35 Quit (global_game_variables_t *gvar, char *error) function\r
  36 \r
  37 \r
  38 WORK TO DO\r
  39 ----------\r
  40 MM_SizePtr to change the size of a given pointer\r
  41 \r
  42 Multiple purge levels utilized\r
  43 \r
  44 EMS / XMS unmanaged routines\r
  45 \r
  46 =============================================================================\r
  47 */\r
  48 /*\r
  49 \r
  50 Open Watcom port by sparky4\r
  51 \r
  52 */\r
  53 #include "src/lib/16_mm.h"\r
  54 #include "src/lib/16_ca.h"\r
  55 #include <malloc.h>\r
  56 #pragma hdrstop\r
  57 \r
  58 #pragma warn -pro\r
  59 #pragma warn -use\r
  60 \r
  61 /*\r
  62 =============================================================================\r
  63 \r
  64                                                         LOCAL INFO\r
  65 \r
  66 =============================================================================\r
  67 */\r
  68 \r
  69 #define LOCKBIT         0x80    // if set in attributes, block cannot be moved\r
  70 #define PURGEBITS       3               // 0-3 level, 0= unpurgable, 3= purge first\r
  71 #define PURGEMASK       0xfffc\r
  72 #define BASEATTRIBUTES  0       // unlocked, non purgable\r
  73 \r
  74 //#define MAXUMBS               10\r
  75 \r
  76 /*typedef struct mmblockstruct\r
  77 {\r
  78         unsigned        start,length;\r
  79         unsigned        attributes;\r
  80         memptr          *useptr;        // pointer to the segment start\r
  81         struct mmblockstruct far *next;\r
  82 } mmblocktype;*/\r
  83 \r
  84 \r
  85 //#define GETNEWBLOCK {if(!(mmnew=mmfree))Quit("MM_GETNEWBLOCK: No free blocks!") ;mmfree=mmfree->next;}\r
  86 //\r
  87 \r
  88 #define GETNEWBLOCK {if(!gvar->mm.mmfree)MML_ClearBlock(gvar);gvar->mm.mmnew=gvar->mm.mmfree;gvar->mm.mmfree=gvar->mm.mmfree->next;}\r
  89 \r
  90 #define FREEBLOCK(x) {*x->useptr=NULL;x->next=gvar->mm.mmfree;gvar->mm.mmfree=x;}\r
  91 \r
  92 /*\r
  93 =============================================================================\r
  94 \r
  95                                                  GLOBAL VARIABLES\r
  96 \r
  97 =============================================================================\r
  98 */\r
  99 \r
 100 /*mminfotype    mminfo;\r
 101 memptr          bufferseg;\r
 102 boolean         mmerror;*/\r
 103 \r
 104 void            (* beforesort) (void);\r
 105 void            (* aftersort) (void);\r
 106 \r
 107 /*\r
 108 =============================================================================\r
 109 \r
 110                                                  LOCAL VARIABLES\r
 111 \r
 112 =============================================================================\r
 113 */\r
 114 \r
 115 /*boolean               mmstarted;\r
 116 \r
 117 void far        *farheap;\r
 118 void            *nearheap;\r
 119 \r
 120 mmblocktype     far mmblocks[MAXBLOCKS]\r
 121                         ,far *mmhead,far *mmfree,far *mmrover,far *mmnew;\r
 122 \r
 123 boolean         bombonerror;*/\r
 124 \r
 125 //unsigned      totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle;\r
 126 \r
 127 void            (* XMSaddr) (void);             // far pointer to XMS driver\r
 128 \r
 129 /*unsigned      numUMBs,UMBbase[MAXUMBS];*/\r
 130 \r
 131 //==========================================================================\r
 132 \r
 133 //\r
 134 // local prototypes\r
 135 //\r
 136 \r
 137 boolean         MML_CheckForEMS (void);\r
 138 void            MML_ShutdownEMS (void);\r
 139 void            MM_MapEMS (void);\r
 140 boolean         MML_CheckForXMS (void);\r
 141 void            MML_ShutdownXMS (void);\r
 142 //void          MML_UseSpace (unsigned segstart, unsigned seglength);\r
 143 //void          MML_ClearBlock (void);\r
 144 \r
 145 //==========================================================================\r
 146 #ifndef __16_PM__\r
 147 #if 0\r
 148 static  char *ParmStringsexmm[] = {"noems","noxms",""};\r
 149 #endif\r
 150 #endif\r
 151 /*\r
 152 ======================\r
 153 =\r
 154 = MML_CheckForEMS\r
 155 =\r
 156 = Routine from p36 of Extending DOS\r
 157 =\r
 158 =======================\r
 159 */\r
 160 \r
 161 boolean MML_CheckForEMS(void)\r
 162 {\r
 163         boolean emmcfems = false;\r
 164         word            EMSPageFrame = 0;\r
 165         byte    err=0, str[64];\r
 166         static char     emmname[] = "EMMXXXX0"; //fix by andrius4669\r
 167         __asm {\r
 168                 mov     dx,OFFSET emmname       //fix by andrius4669\r
 169                 mov     ax,0x3d00\r
 170                 int     EMM_INT         // try to open EMMXXXX0 device\r
 171                 jc      error\r
 172 \r
 173                 mov     bx,ax\r
 174                 mov     ax,0x4400\r
 175 \r
 176                 int     EMM_INT         // get device info\r
 177                 jc      error\r
 178 \r
 179                 and     dx,0x80\r
 180                 jz      error\r
 181 \r
 182                 mov     ax,0x4407\r
 183 \r
 184                 int     EMM_INT         // get status\r
 185                 jc      error\r
 186                 or      al,al\r
 187                 jz      error\r
 188 \r
 189                 mov     ah,0x3e\r
 190                 int     EMM_INT         // close handle\r
 191                 jc      error\r
 192 \r
 193                 //\r
 194                 // pageframe check\r
 195                 //\r
 196                 mov     ah,EMS_GETFRAME\r
 197                 int     EMS_INT                 // find the page frame address\r
 198                 or      ah,ah\r
 199                 jnz     error\r
 200                 mov     [EMSPageFrame],bx\r
 201 \r
 202                 //\r
 203                 // EMS is good\r
 204                 //\r
 205                 mov     emmcfems,1\r
 206                 jmp     End\r
 207 #ifdef __BORLANDC__\r
 208         }\r
 209 #endif\r
 210                 error:\r
 211 #ifdef __BORLANDC__\r
 212         __asm {\r
 213 #endif\r
 214                 //\r
 215                 // EMS is bad\r
 216                 //\r
 217                 mov     err,ah\r
 218                 mov     emmcfems,0\r
 219 #ifdef __BORLANDC__\r
 220         }\r
 221 #endif\r
 222                 End:\r
 223 #ifdef __WATCOMC__\r
 224         }\r
 225 #endif\r
 226 \r
 227         //\r
 228         // Pageframe switch to determine if there is one!\r
 229         //\r
 230         if(!EMSPageFrame)\r
 231         {\r
 232                 emmcfems = false;\r
 233 #if defined(__DEBUG_PM__) || defined(__DEBUG_MM__)\r
 234                 printf("MML_CheckForEMS: EMS error No Pageframe!\nAddress detected to be %04x\n", EMSPageFrame);\r
 235 #endif\r
 236         }else   if(!emmcfems)// if there is an error and page frame is not 0000\r
 237         {\r
 238                 strcpy(str,"MML_CheckForEMS: EMS error ");\r
 239                 MM_EMSerr(str, err);\r
 240                 printf("%s\n",str);\r
 241         }\r
 242 \r
 243         return(emmcfems);\r
 244 }\r
 245 \r
 246 #ifndef __16_PM__\r
 247 #if 0\r
 248 /*\r
 249 ======================\r
 250 =\r
 251 = MML_SetupEMS\r
 252 =\r
 253 =======================\r
 254 */\r
 255 \r
 256 byte MML_SetupEMS(global_game_variables_t *gvar)\r
 257 {\r
 258         byte    str[160];\r
 259         byte    err;\r
 260         boolean errorflag=false;\r
 261 \r
 262         unsigned int EMSVer = 0;\r
 263         //byte  EMS_status;\r
 264         unsigned        totalEMSpages,freeEMSpages,EMSPageFrame,EMSpagesmapped,EMSHandle;\r
 265         totalEMSpages = freeEMSpages = EMSPageFrame = EMSpagesmapped = 0;\r
 266 \r
 267         __asm {\r
 268                 mov     ah,EMS_STATUS\r
 269                 int     EMS_INT                                         // make sure EMS hardware is present\r
 270                 or      ah,ah\r
 271                 //mov   [EMS_status],ah\r
 272                 jnz     error\r
 273 \r
 274                 mov     ah,EMS_VERSION\r
 275                 int     EMS_INT\r
 276                 or      ah,ah\r
 277                 jnz     error\r
 278                 mov     [EMSVer],ax                             //      set EMSVer\r
 279                 cmp     al,0x32                                         // only work on ems 3.2 or greater\r
 280                 jb      error\r
 281 \r
 282                 mov     ah,EMS_GETFRAME\r
 283                 int     EMS_INT                                         // find the page frame address\r
 284                 or      ah,ah\r
 285                 jnz     error\r
 286                 mov     [EMSPageFrame],bx\r
 287 \r
 288                 mov     ah,EMS_GETPAGES\r
 289                 int     EMS_INT                                         // find out how much EMS is there\r
 290                 or      ah,ah\r
 291                 jnz     error\r
 292                 mov     [totalEMSpages],dx\r
 293                 mov     [freeEMSpages],bx\r
 294                 or      bx,bx\r
 295                 jz      noEMS                                           // no EMS at all to allocate\r
 296                                                                                         //EXPAND DONG!!!!\r
 297                 cmp     [EMSVer],0x40\r
 298                 jb      low\r
 299                 cmp     bx,[freeEMSpages]\r
 300                 jle     getpages\r
 301                 mov     bx,[freeEMSpages]\r
 302                 jmp     getpages\r
 303 #ifdef __BORLANDC__\r
 304         }\r
 305 #endif\r
 306         low:\r
 307 #ifdef __BORLANDC__\r
 308         __asm {\r
 309 #endif\r
 310                 cmp     bx,4\r
 311                 jle     getpages                                        // there is only 1,2,3,or 4 pages\r
 312                 mov     bx,4                                            // we can't use more than 4 pages\r
 313 #ifdef __BORLANDC__\r
 314         }\r
 315 #endif\r
 316         getpages:\r
 317 #ifdef __BORLANDC__\r
 318         __asm {\r
 319 #endif\r
 320                 mov     [EMSpagesmapped],bx\r
 321                 mov     ah,EMS_ALLOCPAGES                       // allocate up to 64k of EMS\r
 322                 int     EMS_INT\r
 323                 or      ah,ah\r
 324                 jnz     error\r
 325                 mov     [EMSHandle],dx\r
 326                 jmp End\r
 327 #ifdef __BORLANDC__\r
 328         }\r
 329 #endif\r
 330         error:\r
 331 #ifdef __BORLANDC__\r
 332         __asm {\r
 333 #endif\r
 334                 mov     err,ah\r
 335                 mov     errorflag,1\r
 336                 jmp End\r
 337 #ifdef __BORLANDC__\r
 338         }\r
 339 #endif\r
 340 noEMS:\r
 341 End:\r
 342 #ifdef __WATCOMC__\r
 343         }\r
 344 #endif\r
 345         if(errorflag==true)\r
 346         {\r
 347                 strcpy(str,"MM_SetupEMS: EMS error ");\r
 348                 MM_EMSerr(str, err);\r
 349                 printf("%s\n",str);\r
 350                 return err;\r
 351         }\r
 352         gvar->mm.totalEMSpages=totalEMSpages;\r
 353         gvar->mm.freeEMSpages=freeEMSpages;\r
 354         gvar->mm.EMSPageFrame=EMSPageFrame;\r
 355         gvar->mm.EMSpagesmapped=EMSpagesmapped;\r
 356         gvar->mm.EMSHandle=EMSHandle;\r
 357         gvar->mm.EMSVer=EMSVer;\r
 358         return 0;\r
 359 }\r
 360 \r
 361 \r
 362 /*\r
 363 ======================\r
 364 =\r
 365 = MML_ShutdownEMS\r
 366 =\r
 367 =======================\r
 368 */\r
 369 \r
 370 void MML_ShutdownEMS(global_game_variables_t *gvar)\r
 371 {\r
 372         boolean errorflag=false;\r
 373         unsigned EMSHandle=gvar->mm.EMSHandle;\r
 374 \r
 375         if(!EMSHandle)\r
 376                 return;\r
 377         __asm {\r
 378                 mov     ah,EMS_FREEPAGES\r
 379                 mov     dx,[EMSHandle]\r
 380                 int     EMS_INT\r
 381                 or      ah,ah\r
 382                 jz      ok\r
 383                 mov     errorflag,1\r
 384 #ifdef __BORLANDC__\r
 385         }\r
 386 #endif\r
 387                 ok:\r
 388 #ifdef __WATCOMC__\r
 389         }\r
 390 #endif\r
 391         if(errorflag==true)\r
 392                 Quit (gvar, "MML_ShutdownEMS: Error freeing EMS!\n");   //++++ add something\r
 393 }\r
 394 \r
 395 /*\r
 396 ====================\r
 397 =\r
 398 = MM_MapEMS\r
 399 =\r
 400 = Maps the 64k of EMS used by memory manager into the page frame\r
 401 = for general use.  This only needs to be called if you are keeping\r
 402 = other things in EMS.\r
 403 =\r
 404 ====================\r
 405 */\r
 406 \r
 407 byte MM_MapEMS(global_game_variables_t *gvar)\r
 408 {\r
 409         byte    str[160];\r
 410         unsigned        EMSHandle;\r
 411         byte err;\r
 412         boolean errorflag=false;\r
 413         int     i;\r
 414         EMSHandle=gvar->mm.EMSHandle;\r
 415 \r
 416         for (i=0;i<4/*MAPPAGES*/;i++)\r
 417         {\r
 418                 __asm {\r
 419                         mov     ah,EMS_MAPPAGE\r
 420                         mov     bx,[i]                  // logical page\r
 421                         mov     al,bl                   // physical page\r
 422                         mov     dx,[EMSHandle]  // handle\r
 423                         int     EMS_INT\r
 424                         or      ah,ah\r
 425                         jnz     error\r
 426                         jmp End\r
 427 #ifdef __BORLANDC__\r
 428                 }\r
 429 #endif\r
 430                         error:\r
 431 #ifdef __BORLANDC__\r
 432                 __asm {\r
 433 #endif\r
 434                         mov     err,ah\r
 435                         mov     errorflag,1\r
 436 #ifdef __BORLANDC__\r
 437                 }\r
 438 #endif\r
 439                         End:\r
 440 #ifdef __WATCOMC__\r
 441                 }\r
 442 #endif\r
 443                 if(errorflag==true)\r
 444                 {\r
 445                         strcpy(str,"MM_MapEMS: EMS error ");\r
 446                         MM_EMSerr(str, err);\r
 447                         printf("%s\n",str);\r
 448                         return err;\r
 449                 }\r
 450         }\r
 451         gvar->mmi.EMSmem = (i)*0x4000lu;\r
 452         return 0;\r
 453 }\r
 454 \r
 455 byte MM_MapXEMS(global_game_variables_t *gvar)\r
 456 {\r
 457 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)\r
 458 \r
 459         //Maps up to 4 logical EMS pages to physical pages in the page frame, where:\r
 460         //PhysicalStart = Physical page first logical page is mapped to\r
 461         //LogicalStart  = First logical page to map\r
 462         //NumPages      = Number of pages to map (1 to 4)\r
 463         //Handle        = EMS handle logical pages are allocated to\r
 464 \r
 465   /*//Create a buffer containing the page information\r
 466 //  FOR x = 0 TO NumPages - 1\r
 467 //    MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)\r
 468 //  NEXT*/\r
 469 \r
 470 //  Regs.ax = 0x5000                           //Map the pages in the buffer\r
 471 //  Regs.cx = NumPages                         //to the pageframe\r
 472 //  Regs.dx = Handle\r
 473 //  Regs.ds = VARSEG(MapInfo$)\r
 474 //  Regs.si = SADD(MapInfo$)\r
 475 //  InterruptX 0x67, Regs, Regs\r
 476 //      EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100  //Store the status code\r
 477 \r
 478 //END SUB\r
 479         byte    str[160];\r
 480         byte err;\r
 481         word    EMSHandle;\r
 482         boolean errorflag=false;\r
 483         int     i;\r
 484         EMSHandle=gvar->mm.EMSHandle;\r
 485 \r
 486         if(gvar->mm.EMSVer<0x40)\r
 487                 return 5;\r
 488 \r
 489         for (i=0;i<MAPPAGES;i++)\r
 490         {\r
 491                 __asm {\r
 492                         mov     ah,EMS_MAPXPAGE\r
 493                         mov     cx,[i]                  // logical page\r
 494                         mov     al,bl                   // physical page\r
 495                         mov     dx,[EMSHandle]  // handle\r
 496                         int     EMS_INT\r
 497                         or      ah,ah\r
 498                         jnz     error\r
 499                         jmp End\r
 500 #ifdef __BORLANDC__\r
 501                 }\r
 502 #endif\r
 503                         error:\r
 504 #ifdef __BORLANDC__\r
 505                 __asm {\r
 506 #endif\r
 507                         mov     err,ah\r
 508                         mov     errorflag,1\r
 509 #ifdef __BORLANDC__\r
 510                 }\r
 511 #endif\r
 512                         End:\r
 513 #ifdef __WATCOMC__\r
 514                 }\r
 515 #endif\r
 516                 if(errorflag==true)\r
 517                 {\r
 518                         //strcpy(str,"MM_MapXEMS: EMS error 0x");\r
 519                         strcpy(str,"MM_MapXEMS: EMS error ");\r
 520                         //itoa(err,str2,16);\r
 521                         MM_EMSerr(str, err);\r
 522                         printf("%s\n",str);\r
 523                         //printf("%s%x\n",str, err);\r
 524                         //printf("FACK! %x\n", err);\r
 525                         return err;\r
 526                 }\r
 527         }\r
 528         gvar->mmi.EMSmem = (i)*0x4000lu;\r
 529         return 0;\r
 530 }\r
 531 #endif\r
 532 #endif\r
 533 //==========================================================================\r
 534 \r
 535 /*\r
 536 ======================\r
 537 =\r
 538 = MML_CheckForXMS\r
 539 =\r
 540 = Check for XMM driver\r
 541 =\r
 542 =======================\r
 543 */\r
 544 \r
 545 boolean MML_CheckForXMS(void)\r
 546 {\r
 547         //numUMBs = 0;\r
 548         boolean errorflag=false;\r
 549 \r
 550         __asm {\r
 551                 mov     ax,0x4300\r
 552                 int     0x2f                            // query status of installed diver\r
 553                 cmp     al,0x80\r
 554                 je      good\r
 555                 mov     errorflag,1\r
 556 #ifdef __BORLANDC__\r
 557         }\r
 558 #endif\r
 559                 good:\r
 560 #ifdef __WATCOMC__\r
 561         }\r
 562 #endif\r
 563         if(errorflag==true) return false;\r
 564         else return true;\r
 565 }\r
 566 \r
 567 #ifndef __16_PM__\r
 568 #if 0\r
 569 /*\r
 570 ======================\r
 571 =\r
 572 = MML_SetupXMS\r
 573 =\r
 574 = Try to allocate all upper memory block\r
 575 =\r
 576 =======================\r
 577 */\r
 578 \r
 579 void MML_SetupXMS(global_game_variables_t *gvar)\r
 580 {\r
 581         word    base,size;\r
 582 \r
 583 \r
 584         __asm {\r
 585                 mov     ax,0x4310\r
 586                 int     0x2f\r
 587                 mov     [WORD PTR XMSaddr],bx\r
 588                 mov     [WORD PTR XMSaddr+2],es         // function pointer to XMS driver\r
 589         }\r
 590 getmemory:\r
 591         __asm {\r
 592                 mov     ah,XMS_ALLOCUMB\r
 593                 mov     dx,0xffff                                       // try for largest block possible\r
 594                 //mov     ax,dx                                         // Set available Kbytes.\r
 595                 call    [DWORD PTR XMSaddr]\r
 596                 or      ax,ax\r
 597                 jnz     gotone\r
 598 \r
 599                 cmp     bl,0xb0                                         // error: smaller UMB is available\r
 600                 jne     done;\r
 601 \r
 602                 mov     ah,XMS_ALLOCUMB\r
 603                 call    [DWORD PTR XMSaddr]             // DX holds largest available UMB\r
 604                 or      ax,ax\r
 605                 jz      done                                            // another error...\r
 606 #ifdef __BORLANDC__\r
 607         }\r
 608 #endif\r
 609                 gotone:\r
 610 #ifdef __BORLANDC__\r
 611         __asm {\r
 612 #endif\r
 613                 mov     [base],bx\r
 614                 mov     [size],dx\r
 615 #ifdef __BORLANDC__\r
 616         }\r
 617 #endif\r
 618                 done:\r
 619 #ifdef __WATCOMC__\r
 620         }\r
 621 #endif\r
 622 //      printf("base=%u ", base); printf("size=%u\n", size);\r
 623         MML_UseSpace(base,size, gvar);\r
 624         gvar->mmi.XMSmem += size*16;\r
 625         gvar->mm.UMBbase[gvar->mm.numUMBs] = base;\r
 626         gvar->mm.numUMBs++;\r
 627         if(gvar->mm.numUMBs < MAXUMBS)\r
 628                 goto getmemory;\r
 629 }\r
 630 \r
 631 \r
 632 /*\r
 633 ======================\r
 634 =\r
 635 = MML_ShutdownXMS\r
 636 =\r
 637 ======================\r
 638 */\r
 639 \r
 640 void MML_ShutdownXMS(global_game_variables_t *gvar)\r
 641 {\r
 642         int     i;\r
 643         unsigned        base;\r
 644 \r
 645         for (i=0;i<gvar->mm.numUMBs;i++)\r
 646         {\r
 647                 base = gvar->mm.UMBbase[i];\r
 648                 __asm {\r
 649                         mov     ah,XMS_FREEUMB\r
 650                         mov     dx,[base]\r
 651                         call    [DWORD PTR XMSaddr]\r
 652                 }\r
 653         }\r
 654 }\r
 655 #endif\r
 656 #endif\r
 657 //==========================================================================\r
 658 \r
 659 /*\r
 660 ======================\r
 661 =\r
 662 = MML_UseSpace\r
 663 =\r
 664 = Marks a range of paragraphs as usable by the memory manager\r
 665 = This is used to mark space for the near heap, far heap, ems page frame,\r
 666 = and upper memory blocks\r
 667 =\r
 668 ======================\r
 669 */\r
 670 \r
 671 /*\r
 672         extra = oldend - (segstart+seglength);\r
 673 \r
 674         segmlen=extra;\r
 675 \r
 676         //++++emsver stuff!\r
 677         if(segm>1)/// || extra>=0x10000lu)\r
 678         //if(extra>0xfffflu)\r
 679         {\r
 680                 scan->blob=segm;\r
 681 \r
 682                 //MML_UseSpace(segstart, seglength, gvar);\r
 683 \r
 684                 printf("MML_UseSpace: Segment spans two blocks!\n");\r
 685         //}\r
 686         printf("segm=%u         ", segm);\r
 687         printf("ex=%lu  ", extra);\r
 688         printf("old=%u  ", oldend);\r
 689         printf("start+seglen=%lu\n", segstart+seglength);\r
 690         printf("segsta=%x       ", segstart);\r
 691         printf("len=%lu ", scan->length);\r
 692         printf("seglen=%lu      ", seglength);\r
 693         printf("segmlen=%lu\n", segmlen);\r
 694         }\r
 695 //++++todo: linked list of segment!\r
 696 */\r
 697 void MML_UseSpace (unsigned segstart, unsigned seglength, global_game_variables_t *gvar)\r
 698 {\r
 699         mmblocktype far *scan,far *last;\r
 700         unsigned        oldend;\r
 701         sdword          extra;\r
 702         //word segm=1;\r
 703 \r
 704         scan = last = gvar->mm.mmhead;\r
 705         gvar->mm.mmrover = gvar->mm.mmhead;             // reset rover to start of memory\r
 706 \r
 707 //\r
 708 // search for the block that contains the range of segments\r
 709 //\r
 710         while (scan->start+scan->length < segstart)\r
 711         {\r
 712                 last = scan;\r
 713                 scan = scan->next;\r
 714         }\r
 715 \r
 716 //\r
 717 // find out how many blocks it spans!\r
 718 //\r
 719         /*for(;seglength>=0x10000;seglength-=0xFFFF)\r
 720         {\r
 721                 //printf("      seglen=%lu\n", segmlen);\r
 722                 segm++;\r
 723         }*/\r
 724 \r
 725 //\r
 726 // take the given range out of the block\r
 727 //\r
 728         oldend = scan->start + scan->length;\r
 729         extra = oldend - (segstart+seglength);\r
 730         if (extra < 0)\r
 731 #ifdef __DEBUG_MM__\r
 732         {\r
 733                 printf("========================================\n");\r
 734                 printf("start=%x        ", scan->start);\r
 735                 printf("old=%u  ", oldend);\r
 736                 printf("start+seglen=%lu\n", segstart+seglength);\r
 737                 printf("segsta=%x       ", segstart);\r
 738                 printf("len=%lu ", scan->length);\r
 739                 printf("seglen=%lu      ", seglength);\r
 740                 printf("\n");\r
 741                 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);\r
 742                 printf("========================================\n");\r
 743                 //return;\r
 744         }\r
 745 #else\r
 746                 Quit (gvar, "MML_UseSpace: Segment spans two blocks!");\r
 747 #endif\r
 748 \r
 749         if (segstart == scan->start)\r
 750         {\r
 751                 last->next = scan->next;                        // unlink block\r
 752                 FREEBLOCK(scan);\r
 753                 scan = last;\r
 754         }\r
 755         else\r
 756                 scan->length = segstart-scan->start;    // shorten block\r
 757 \r
 758         if (extra > 0)\r
 759         {\r
 760                 GETNEWBLOCK;\r
 761                 gvar->mm.mmnew->useptr = NULL;\r
 762 \r
 763                 gvar->mm.mmnew->next = scan->next;\r
 764                 scan->next = gvar->mm.mmnew;\r
 765                 gvar->mm.mmnew->start = segstart+seglength;\r
 766                 gvar->mm.mmnew->length = extra;\r
 767                 gvar->mm.mmnew->attributes = LOCKBIT;\r
 768         }//else if(segm>0) goto segu;\r
 769 \r
 770 }\r
 771 \r
 772 //==========================================================================\r
 773 \r
 774 /*\r
 775 ====================\r
 776 =\r
 777 = MML_ClearBlock\r
 778 =\r
 779 = We are out of blocks, so free a purgable block\r
 780 =\r
 781 ====================\r
 782 */\r
 783 \r
 784 void MML_ClearBlock (global_game_variables_t *gvar)\r
 785 {\r
 786         mmblocktype far *scan;//,far *last;\r
 787 \r
 788         scan = gvar->mm.mmhead->next;\r
 789 \r
 790         while(scan)\r
 791         {\r
 792                 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS) )\r
 793                 {\r
 794                         MM_FreePtr (scan->useptr, gvar);\r
 795                         return;\r
 796                 }\r
 797                 scan = scan->next;\r
 798         }\r
 799 \r
 800         Quit (gvar, "MM_ClearBlock: No purgable blocks!\n");\r
 801 }\r
 802 \r
 803 \r
 804 //==========================================================================\r
 805 \r
 806 /*\r
 807 ===================\r
 808 =\r
 809 = MM_Startup\r
 810 =\r
 811 = Grabs all space from turbo with malloc/farmalloc\r
 812 = Allocates bufferseg misc buffer\r
 813 =\r
 814 ===================\r
 815 */\r
 816 \r
 817 void MM_Startup (global_game_variables_t *gvar)\r
 818 {\r
 819         int i;\r
 820         dword length;\r
 821         void far        *start;\r
 822         unsigned        segstart,seglength;//,endfree;\r
 823 \r
 824         if(gvar->mm.mmstarted)\r
 825                 MM_Shutdown (gvar);\r
 826 \r
 827         //has to be 16\r
 828         if(sizeof(mmblocktype)!=16)\r
 829                 Quit (gvar, "mmblocktype size is not 16");\r
 830 \r
 831         gvar->mm.mmstarted = true;\r
 832         gvar->mm.bombonerror = true;\r
 833 //\r
 834 // set up the linked list (everything in the free list;\r
 835 //\r
 836         gvar->mm.mmhead = NULL;\r
 837         gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);\r
 838         for (i=0;i<MAXBLOCKS-1;i++)\r
 839                 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);\r
 840         gvar->mm.mmblocks[i].next = NULL;\r
 841 \r
 842 //\r
 843 // locked block of all memory until we punch out free space\r
 844 //\r
 845         GETNEWBLOCK;\r
 846         gvar->mm.mmhead = gvar->mm.mmnew;                               // this will allways be the first node\r
 847         gvar->mm.mmnew->start = 0;\r
 848         gvar->mm.mmnew->length = 0xffff;\r
 849         gvar->mm.mmnew->attributes = LOCKBIT;\r
 850         gvar->mm.mmnew->next = NULL;\r
 851         gvar->mm.mmrover = gvar->mm.mmhead;\r
 852 \r
 853 \r
 854 //\r
 855 // get all available near conventional memory segments\r
 856 //\r
 857 #ifdef __WATCOMC__\r
 858         _nheapgrow();\r
 859 #endif\r
 860         length=(word)_memavl();//(word)coreleft();\r
 861         //start = gvar->mm.nearheap = _fmalloc(length);\r
 862 #ifdef __WATCOMC__\r
 863         start = (void __far *)(gvar->mm.nearheap = _nmalloc(length));\r
 864 #endif\r
 865 #ifdef __BORLANDC__\r
 866         start = (void far *)(gvar->mm.nearheap = malloc(length));\r
 867 #endif\r
 868 \r
 869         length -= 16-(FP_OFF(start)&15);\r
 870         length -= SAVENEARHEAP;\r
 871         seglength = length / 16;                        // now in paragraphs\r
 872         segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;\r
 873         MML_UseSpace (segstart,seglength, gvar);\r
 874         gvar->mmi.nearheap = length;\r
 875         //0000printf("near:     start=%Fp       segstart=%x     seglen=%lu      len=%lu\n", start, segstart, (dword)seglength, length);\r
 876 \r
 877 //\r
 878 // get all available far conventional memory segments\r
 879 //\r
 880 #ifdef __WATCOMC__\r
 881         _fheapgrow();\r
 882 #endif\r
 883 #ifdef __BORLANDC__\r
 884 //      printf("farcoreleft()                           %lu\n", farcoreleft());\r
 885 //      printf("(farcoreleft()+32)-_FCORELEFT   %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));\r
 886 #endif\r
 887         length=_FCORELEFT;\r
 888         start = gvar->mm.farheap = _fmalloc(length);//start = gvar->mm.farheap = halloc(length, 1);\r
 889 \r
 890         length -= 16-(FP_OFF(start)&15);\r
 891         length -= SAVEFARHEAP;\r
 892         seglength = length / 16;                        // now in paragraphs\r
 893         segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;\r
 894         MML_UseSpace (segstart,seglength, gvar);\r
 895         gvar->mmi.farheap = length;\r
 896         //0000printf("far:      start=%Fp       segstart=%x     seglen=%lu      len=%lu\n", start, segstart, (dword)seglength, length);\r
 897 \r
 898         gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;\r
 899 \r
 900 #if !defined(__16_PM__)// && defined(__WATCOMC__)\r
 901 #if 0\r
 902         if(!dbg_debugpm) {\r
 903 //\r
 904 // detect EMS and allocate up to 64K at page frame\r
 905 //\r
 906         gvar->mmi.EMSmem = 0;\r
 907 //goto emsskip; //0000\r
 908         for(i = 1;i < _argc;i++)\r
 909         {\r
 910                 if(US_CheckParm(_argv[i],ParmStringsexmm) == 0)\r
 911                         goto emsskip;                           // param NOEMS\r
 912         }\r
 913         if(MML_CheckForEMS())\r
 914         {\r
 915                 MML_SetupEMS(gvar);                                     // allocate space\r
 916                 //16_PM: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!\r
 917                 MML_UseSpace(gvar->mm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);\r
 918                 //if(gvar->pm.emm.EMSVer<0x40)\r
 919                         MM_MapEMS(gvar);                                        // map in used pages\r
 920                 //else\r
 921                         //MM_MapXEMS(gvar);                                     // map in used pages\r
 922         }\r
 923 \r
 924 //\r
 925 // detect XMS and get upper memory blocks\r
 926 //\r
 927 emsskip:\r
 928         gvar->mmi.XMSmem = 0;\r
 929 goto xmsskip;//0000\r
 930         for(i = 1;i < _argc;i++)\r
 931         {\r
 932                 if(US_CheckParm( _argv[i],ParmStringsexmm) == 0)\r
 933                         goto xmsskip;                           // param NOXMS\r
 934         }\r
 935         if(MML_CheckForXMS())\r
 936         {\r
 937                 MML_SetupXMS(gvar);                                     // allocate as many UMBs as possible\r
 938         }\r
 939 \r
 940         }\r
 941 xmsskip:\r
 942 #endif\r
 943 #endif\r
 944 //\r
 945 // allocate the misc buffer\r
 946 //\r
 947         gvar->mm.mmrover = gvar->mm.mmhead;             // start looking for space after low block\r
 948 \r
 949         MM_GetPtr (&(gvar->mm.bufferseg),BUFFERSIZE, gvar);\r
 950 }\r
 951 \r
 952 //==========================================================================\r
 953 \r
 954 /*\r
 955 ====================\r
 956 =\r
 957 = MM_Shutdown\r
 958 =\r
 959 = Frees all conventional, EMS, and XMS allocated\r
 960 =\r
 961 ====================\r
 962 */\r
 963 \r
 964 void MM_Shutdown (global_game_variables_t *gvar)\r
 965 {\r
 966         if(!(gvar->mm.mmstarted))\r
 967                 return;\r
 968 \r
 969         _ffree(gvar->mm.farheap);//     printf("                far freed\n");\r
 970 #ifdef __WATCOMC__\r
 971         _nfree(gvar->mm.nearheap);//    printf("                near freed\n");\r
 972 #endif\r
 973 #ifdef __BORLANDC__\r
 974         free(gvar->mm.nearheap);//      printf("                near freed\n");\r
 975 #endif\r
 976 #ifndef __16_PM__\r
 977 #if 0\r
 978 #ifdef __DEBUG__\r
 979         if(!dbg_debugpm) {\r
 980 #endif\r
 981         if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf("               EMS freed\n"); }\r
 982         if(MML_CheckForXMS()){ MML_ShutdownXMS(gvar); }//printf("               XMS freed\n"); }\r
 983 #ifdef __DEBUG__\r
 984         }\r
 985 #endif\r
 986 #endif\r
 987 #endif\r
 988 }\r
 989 \r
 990 //==========================================================================\r
 991 \r
 992 /*\r
 993 ====================\r
 994 =\r
 995 = MM_GetPtr\r
 996 =\r
 997 = Allocates an unlocked, unpurgable block\r
 998 =\r
 999 ====================\r
1000 */\r
1001 \r
1002 void MM_GetPtr (memptr *baseptr,dword size, global_game_variables_t *gvar)\r
1003 {\r
1004         mmblocktype far *scan,far *lastscan,far *endscan\r
1005                                 ,far *purge,far *next;\r
1006         int                     search;\r
1007         unsigned        needed,startseg;\r
1008 \r
1009         needed = (size+15)/16;          // convert size from bytes to paragraphs\r
1010 \r
1011         GETNEWBLOCK;                            // fill in start and next after a spot is found\r
1012         gvar->mm.mmnew->length = needed;\r
1013         gvar->mm.mmnew->useptr = baseptr;\r
1014         gvar->mm.mmnew->attributes = BASEATTRIBUTES;\r
1015         //if(gvar->mm.mmnew->useptr==NULL){\r
1016 #ifdef __DEBUG_MM__\r
1017         if(dbg_debugmm>0){\r
1018         printf("===============================================================================\n");\r
1019         printf("                MM_GetPtr\n");\r
1020         printf("===============================================================================\n");\r
1021                 //%04x\r
1022 //              printf("        baseptr=%Fp     ", baseptr); printf("useptr=%Fp\n", gvar->mm.mmnew->useptr);\r
1023 //              //printf("      *baseptr=%Fp    ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));\r
1024 //              printf("        &baseptr=%Fp    ", &baseptr); printf("&useptr=%Fp\n", &(gvar->mm.mmnew->useptr));\r
1025 \r
1026                 printf("        baseptr=%04x    ", baseptr); printf("useptr=%04x\n", gvar->mm.mmnew->useptr);\r
1027                 //printf("      *baseptr=%04x   ", *baseptr); printf("*useptr=%04x\n", *(gvar->mm.mmnew->useptr));\r
1028                 printf("        &baseptr=%04u   ", &baseptr); printf("&useptr=%04u\n", &(gvar->mm.mmnew->useptr));\r
1029 \r
1030                 printf("        size is %lu\n", size);\r
1031         }\r
1032 #endif\r
1033         //Quit (gvar, "gvar->mm.mmnew->useptr==NULL"); }\r
1034 \r
1035 //tryagain:\r
1036         for (search = 0; search<3; search++)\r
1037         {\r
1038         //\r
1039         // first search:        try to allocate right after the rover, then on up\r
1040         // second search:       search from the head pointer up to the rover\r
1041         // third search:        compress memory, then scan from start\r
1042                 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)\r
1043                         search++;\r
1044 \r
1045                 switch (search)\r
1046                 {\r
1047                 case 0:\r
1048                         lastscan = gvar->mm.mmrover;\r
1049                         scan = gvar->mm.mmrover->next;\r
1050                         endscan = NULL;\r
1051                         break;\r
1052                 case 1:\r
1053                         lastscan = gvar->mm.mmhead;\r
1054                         scan = gvar->mm.mmhead->next;\r
1055                         endscan = gvar->mm.mmrover;\r
1056                         break;\r
1057                 case 2:\r
1058                         MM_SortMem (gvar);\r
1059                         lastscan = gvar->mm.mmhead;\r
1060                         scan = gvar->mm.mmhead->next;\r
1061                         endscan = NULL;\r
1062                         break;\r
1063                 }\r
1064 \r
1065                 startseg = lastscan->start + lastscan->length;\r
1066 \r
1067                 while (scan != endscan)\r
1068                 {\r
1069                         if (scan->start - startseg >= needed)\r
1070                         {\r
1071                         //\r
1072                         // got enough space between the end of lastscan and\r
1073                         // the start of scan, so throw out anything in the middle\r
1074                         // and allocate the new block\r
1075                         //\r
1076                                 purge = lastscan->next;\r
1077                                 lastscan->next = gvar->mm.mmnew;\r
1078                                 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;\r
1079                                 gvar->mm.mmnew->next = scan;\r
1080                                 while ( purge != scan)\r
1081                                 {       // free the purgable block\r
1082                                         next = purge->next;\r
1083                                         FREEBLOCK(purge);\r
1084                                         purge = next;           // purge another if not at scan\r
1085                                 }\r
1086                                 gvar->mm.mmrover = gvar->mm.mmnew;\r
1087                                 return; // good allocation!\r
1088                         }\r
1089 \r
1090                         //\r
1091                         // if this block is purge level zero or locked, skip past it\r
1092                         //\r
1093                         if ( (scan->attributes & LOCKBIT)\r
1094                                 || !(scan->attributes & PURGEBITS) )\r
1095                         {\r
1096                                 lastscan = scan;\r
1097                                 startseg = lastscan->start + lastscan->length;\r
1098                         }\r
1099 \r
1100 \r
1101                         scan=scan->next;                // look at next line\r
1102                 }\r
1103         }\r
1104 \r
1105         if (gvar->mm.bombonerror)\r
1106         {\r
1107 #ifdef __WATCOMC__\r
1108                 //heapdump();\r
1109 #endif\r
1110                 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));\r
1111                 Quit (gvar, "for stability reasons the program will shut down! wwww\n");\r
1112         }\r
1113         else\r
1114                 gvar->mm.mmerror = true;\r
1115 }\r
1116 \r
1117 //==========================================================================\r
1118 \r
1119 /*\r
1120 ====================\r
1121 =\r
1122 = MM_FreePtr\r
1123 =\r
1124 = Deallocates an unlocked, purgable block\r
1125 =\r
1126 ====================\r
1127 */\r
1128 \r
1129 void MM_FreePtr (memptr *baseptr, global_game_variables_t *gvar)\r
1130 {\r
1131         mmblocktype far *scan,far *last;\r
1132 \r
1133         last = gvar->mm.mmhead;\r
1134         scan = last->next;\r
1135 \r
1136         if (baseptr == gvar->mm.mmrover->useptr)        // removed the last allocated block\r
1137                 gvar->mm.mmrover = gvar->mm.mmhead;\r
1138 \r
1139         while (scan->useptr != baseptr && scan)\r
1140         {\r
1141                 last = scan;\r
1142                 scan = scan->next;\r
1143         }\r
1144 \r
1145         if (!scan)\r
1146                 Quit (gvar, "MM_FreePtr: Block not found!");\r
1147 \r
1148         last->next = scan->next;\r
1149 \r
1150         FREEBLOCK(scan);\r
1151 }\r
1152 //==========================================================================\r
1153 \r
1154 /*\r
1155 =====================\r
1156 =\r
1157 = MM_SetPurge\r
1158 =\r
1159 = Sets the purge level for a block (locked blocks cannot be made purgable)\r
1160 =\r
1161 =====================\r
1162 */\r
1163 \r
1164 void MM_SetPurge (memptr *baseptr, int purge, global_game_variables_t *gvar)\r
1165 {\r
1166         mmblocktype far *start;\r
1167 \r
1168         start = gvar->mm.mmrover;\r
1169 \r
1170         do\r
1171         {\r
1172                 if (gvar->mm.mmrover->useptr == baseptr)\r
1173                         break;\r
1174 \r
1175                 gvar->mm.mmrover = gvar->mm.mmrover->next;\r
1176 \r
1177                 if (!gvar->mm.mmrover)\r
1178                         gvar->mm.mmrover = gvar->mm.mmhead;\r
1179                 else if (gvar->mm.mmrover == start)\r
1180                         Quit (gvar, "MM_SetPurge: Block not found!");\r
1181 \r
1182         } while (1);\r
1183 \r
1184         gvar->mm.mmrover->attributes &= ~PURGEBITS;\r
1185         gvar->mm.mmrover->attributes |= purge;\r
1186 }\r
1187 \r
1188 //==========================================================================\r
1189 \r
1190 /*\r
1191 =====================\r
1192 =\r
1193 = MM_SetLock\r
1194 =\r
1195 = Locks / unlocks the block\r
1196 =\r
1197 =====================\r
1198 */\r
1199 \r
1200 void MM_SetLock (memptr *baseptr, boolean locked, global_game_variables_t *gvar)\r
1201 {\r
1202         mmblocktype far *start;\r
1203 \r
1204         start = gvar->mm.mmrover;\r
1205 \r
1206         do\r
1207         {\r
1208                 if (gvar->mm.mmrover->useptr == baseptr)\r
1209                         break;\r
1210 \r
1211                 gvar->mm.mmrover = gvar->mm.mmrover->next;\r
1212 \r
1213                 if (!gvar->mm.mmrover)\r
1214                         gvar->mm.mmrover = gvar->mm.mmhead;\r
1215                 else if (gvar->mm.mmrover == start)\r
1216                         Quit (gvar, "MM_SetLock: Block not found!");\r
1217 \r
1218         } while(1);\r
1219 \r
1220         gvar->mm.mmrover->attributes &= ~LOCKBIT;\r
1221         gvar->mm.mmrover->attributes |= locked*LOCKBIT;\r
1222 }\r
1223 \r
1224 //==========================================================================\r
1225 \r
1226 /*\r
1227 =====================\r
1228 =\r
1229 = MM_SortMem\r
1230 =\r
1231 = Throws out all purgable stuff and compresses movable blocks\r
1232 =\r
1233 =====================\r
1234 */\r
1235 \r
1236 void MM_SortMem (global_game_variables_t *gvar)\r
1237 {\r
1238         mmblocktype far *scan,far *last,far *next;\r
1239         unsigned        start,length,source,dest,oldborder;\r
1240         //++++int                       playing;\r
1241 \r
1242         //\r
1243         // lock down a currently playing sound\r
1244         //\r
1245 /*++++  playing = SD_SoundPlaying ();\r
1246         if(playing)\r
1247         {\r
1248                 switch (SoundMode)\r
1249                 {\r
1250                 case sdm_PC:\r
1251                         playing += STARTPCSOUNDS;\r
1252                         break;\r
1253                 case sdm_AdLib:\r
1254                         playing += STARTADLIBSOUNDS;\r
1255                         break;\r
1256                 }\r
1257                 MM_SetLock(MEMPTRCONV audiosegs[playing],true);\r
1258         }\r
1259 \r
1260 \r
1261         SD_StopSound();*/\r
1262 #ifdef __WATCOMC__\r
1263         oldborder = gvar->video.bordercolor;\r
1264         gvar->video.bordercolor = VL_modexPalOverscan(gvar->video.palette, 4);\r
1265 #endif\r
1266 \r
1267         if (beforesort)\r
1268                 beforesort();\r
1269 \r
1270         scan = gvar->mm.mmhead;\r
1271 \r
1272         last = NULL;            // shut up compiler warning\r
1273 \r
1274         while (scan)\r
1275         {\r
1276                 if (scan->attributes & LOCKBIT)\r
1277                 {\r
1278                 //\r
1279                 // block is locked, so try to pile later blocks right after it\r
1280                 //\r
1281                         start = scan->start + scan->length;\r
1282                 }\r
1283                 else\r
1284                 {\r
1285                         if (scan->attributes & PURGEBITS)\r
1286                         {\r
1287                         //\r
1288                         // throw out the purgable block\r
1289                         //\r
1290                                 next = scan->next;\r
1291                                 FREEBLOCK(scan); //MM_FreeBlock(scan, gvar);\r
1292                                 last->next = next;\r
1293                                 scan = next;\r
1294                                 continue;\r
1295                         }\r
1296                         else\r
1297                         {\r
1298                         //\r
1299                         // push the non purgable block on top of the last moved block\r
1300                         //\r
1301                                 if (scan->start != start)\r
1302                                 {\r
1303                                         length = scan->length;\r
1304                                         source = scan->start;\r
1305                                         dest = start;\r
1306                                         while (length > 0xf00)\r
1307                                         {\r
1308                                                 movedata(source,0,dest,0,0xf00*16);\r
1309                                                 length -= 0xf00;\r
1310                                                 source += 0xf00;\r
1311                                                 dest += 0xf00;\r
1312                                         }\r
1313                                         movedata(source,0,dest,0,length*16);\r
1314 \r
1315                                         scan->start = start;\r
1316                                         *(unsigned *)scan->useptr = start;\r
1317                                 }\r
1318                                 start = scan->start + scan->length;\r
1319                         }\r
1320                 }\r
1321 \r
1322                 last = scan;\r
1323                 scan = scan->next;              // go to next block\r
1324         }\r
1325 \r
1326         gvar->mm.mmrover = gvar->mm.mmhead;\r
1327 \r
1328         if (aftersort)\r
1329                 aftersort();\r
1330 \r
1331         VL_ColorBorder (oldborder, &gvar->video);\r
1332 \r
1333 /*++++  if(playing)\r
1334                 MM_SetLock((memptr *)&audiosegs[playing],false);*/\r
1335 }\r
1336 \r
1337 //==========================================================================\r
1338 \r
1339 /*\r
1340 =====================\r
1341 =\r
1342 = MM_ShowMemory\r
1343 =\r
1344 =====================\r
1345 */\r
1346 \r
1347 #ifdef __WATCOMC__\r
1348 //#define MMSMPANVID\r
1349 #define MMSMSCANINFO\r
1350 #endif\r
1351 \r
1352 void MM_ShowMemory (global_game_variables_t *gvar)\r
1353 {\r
1354         mmblocktype far *scan;\r
1355         unsigned color,temp,x,y         ,w,q,width;\r
1356         sdword  end,owner;\r
1357         byte            scratch[160],scratch0[4096],str[16];\r
1358         mmshowmemoryinfo_t scaninfo[MAXBLOCKS];\r
1359 \r
1360         if(!gvar->video.page[0].width) gvar->video.page[0].sw = gvar->video.page[0].width = 320;        //to prevent division by 0\r
1361 //--    VL_SetLineWidth(40, gvar);\r
1362         //temp = gvar->video.ofs.bufferofs;\r
1363         //gvar->video.ofs.bufferofs = gvar->video.ofs.displayofs;\r
1364         temp = BDOFSCONV gvar->video.BOFS;\r
1365         gvar->video.BOFS = gvar->video.DOFS;\r
1366         scan = gvar->mm.mmhead;\r
1367 \r
1368         end = -1; w = 0;\r
1369 \r
1370         width = gvar->video.page[0].width; q = 0;\r
1371 \r
1372         CA_OpenDebug (gvar);\r
1373         while (scan)\r
1374         {\r
1375                 scaninfo[q].scan = scan;\r
1376                 strcpy(scratch, AARESET);\r
1377                 if(scan->attributes & PURGEBITS)\r
1378                 {\r
1379                         color = 6;              // dark purple = purgable\r
1380                         strcpy(scratch0, AAMAGENTA);            // dark purple = purgable\r
1381                 }else{\r
1382                         color = 2;              // medium blue = non purgable\r
1383                         strcpy(scratch0, AABLUE);               // medium blue = non purgable\r
1384                 }\r
1385                 if(scan->attributes & LOCKBIT)\r
1386                 {\r
1387                         color = 1;              // red = locked\r
1388                         strcpy(scratch0, AARED);                // red = locked\r
1389                 }\r
1390                 if (scan->start<=end)\r
1391                 {\r
1392                         printf("\nend==%d\n\n", end);\r
1393                         strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");\r
1394                         strcat(scratch, "End's Size: ");\r
1395                         ultoa (end,str,10);\r
1396                         strcat (scratch,str);\r
1397                         strcat(scratch, "\nscan->start's Size: ");\r
1398                         ultoa (scan->start,str,10);\r
1399                         strcat (scratch,str);\r
1400                         write(gvar->handle.debughandle,scratch,strlen(scratch));\r
1401                         Quit (gvar, "MM_ShowMemory: Memory block order currupted!");\r
1402                 }\r
1403                 end = scan->length-1;\r
1404                 y = scan->start/width;\r
1405                 x = scan->start%width;\r
1406                 scaninfo[q].x = x;\r
1407                 scaninfo[q].y = y;\r
1408                 VW_Hlin(x,x+end,y,color,gvar);\r
1409                 VL_Plot(x,y,5,gvar);\r
1410 //++==++==optional                      strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");\r
1411                 for(w=(scan->start)/80;w<=end/80;w++)\r
1412                 {\r
1413 //printf("+     %u      %lu\n", w, scan->length);\r
1414                         strcat(scratch0, "+");\r
1415                 }\r
1416 \r
1417                 if (scan->next && scan->next->start > end+1)\r
1418                 {\r
1419                         VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,3,gvar);    // black = free//now green\r
1420                         strcat(scratch0, AARESET);\r
1421 //++==++==optional                      strcat(scratch0, "\n");\r
1422                         strcat(scratch0,AAGREEN);\r
1423                         for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)\r
1424                         {\r
1425 //printf("0     %x      %u      %lu\n", scan->next->start, w, scan->length);\r
1426                                 strcat(scratch0,"0");\r
1427                         }\r
1428                         //printf("==================\n");\r
1429                         //printf("w=%u  start=%04x      next=%04x       end=%lu\n", w/80, scan->start, (scan->next->start), end+1);\r
1430                         //printf("==================\n");\r
1431                         strcat(scratch0, "\n");\r
1432                 }\r
1433 #if 0\r
1434                 else {//if(scan->next->start <= scan->start){\r
1435                         scan->next->start=scan->start+0x1000;\r
1436                         strcat(scratch0, AARESET);\r
1437                         strcat(scratch0, "\n");\r
1438                         strcat(scratch0,AAGREEN);\r
1439                         for(w=(end+1);w<=(0x1000/80);w++)\r
1440                         {\r
1441                                 //printf("0     %x      %x      %u\n", scan->start, w);\r
1442                                 strcat(scratch0,"0");\r
1443                         }\r
1444                         printf("================\n");\r
1445                         printf("w=%x    start=%x        next=%x end=%u\n", w, scan->start, (scan->next->start), end+1);\r
1446                         printf("================\n");\r
1447                         getch();\r
1448                 }\r
1449 #endif\r
1450                 strcat(scratch0, AARESET);\r
1451                 //strcat(scratch0,"\n");\r
1452                 strcat(scratch,"Seg:");\r
1453                 ultoa (scan->start,str,16);\r
1454                 strcat (scratch,str);\r
1455 //              strcat(scratch, AABLACK); strcat(scratch,"\t"); strcat(scratch, AARESET);\r
1456                 strcat (scratch,"\tSize:");\r
1457                 ultoa ((unsigned)scan->length,str,10);\r
1458                 strcat (scratch,str);\r
1459 //              strcat(scratch, AABLACK); strcat(scratch,"\t"); strcat(scratch, AARESET);\r
1460                 strcat (scratch,"\tOwner:0x");\r
1461                 owner = (unsigned)scan->useptr;\r
1462                 ultoa (owner,str,16);\r
1463                 strcat (scratch,str);\r
1464                 strcat (scratch,"\n");\r
1465                 write(gvar->handle.debughandle,scratch,strlen(scratch));\r
1466                 write(gvar->handle.debughandle,scratch0,strlen(scratch0));\r
1467 //fprintf(stdout, "%s", scratch);\r
1468 \r
1469                 scan = scan->next;\r
1470                 q++;\r
1471 //if(color!=6) IN_Ack(gvar);\r
1472         }\r
1473 \r
1474         CA_CloseDebug (gvar);\r
1475 \r
1476 #ifdef MMSMPANVID\r
1477         {\r
1478                 int dx,dy,odx,ody;\r
1479                 odx = gvar->video.page[0].dx;\r
1480                 ody = gvar->video.page[0].dy;\r
1481                 dx = dy = 0;\r
1482                 while(!gvar->in.inst->Keyboard[sc_Escape])\r
1483                 {\r
1484                         if(gvar->in.inst->Keyboard[sc_UpArrow])\r
1485                         {\r
1486                                 if(dy>0)\r
1487                                         dy--;\r
1488                         }\r
1489                         else if(gvar->in.inst->Keyboard[sc_DownArrow])\r
1490                         {\r
1491                                 if(dy<gvar->video.page[0].height-gvar->video.page[0].sh)\r
1492                                         dy++;\r
1493                         }\r
1494                         if(gvar->in.inst->Keyboard[sc_LeftArrow])\r
1495                         {\r
1496                                 if(dx>0)\r
1497                                         dx--;\r
1498                         }\r
1499                         else if(gvar->in.inst->Keyboard[sc_RightArrow])\r
1500                         {\r
1501                                 if(dx<gvar->video.page[0].width-gvar->video.page[0].sw)\r
1502                                         dx++;\r
1503                         }\r
1504 \r
1505                         modexPanPage(&gvar->video.page[0], dx, dy);\r
1506                         VL_ShowPage(&gvar->video.page[0], 1, 1);\r
1507                 }\r
1508 \r
1509                 gvar->video.page[0].dx = odx;\r
1510                 gvar->video.page[0].dy = ody;\r
1511         }\r
1512 #endif\r
1513 #ifdef MMSMSCANINFO\r
1514         MM_ShowMemoryDetail (x, y, w, q, end, &scaninfo, gvar);\r
1515 #endif\r
1516 \r
1517 \r
1518         if(gvar->video.VL_Started) IN_Ack(gvar);\r
1519 \r
1520         gvar->video.BOFS = (byte __far *)temp;\r
1521 }\r
1522 \r
1523 #ifdef MMSMSCANINFO\r
1524 void MM_ShowMemoryDetail (unsigned x, unsigned y, unsigned w, unsigned q, sdword end, mmshowmemoryinfo_t *scaninfo, global_game_variables_t *gvar)\r
1525         {\r
1526                 byte scratch1[4];\r
1527                 unsigned                maxq = q;\r
1528                 boolean                 done;\r
1529                 ScanCode                scancode;\r
1530                 int xpos,ypos;\r
1531                 word qq, ccolor = 3;\r
1532                 IN_Ack(gvar);\r
1533 //              VL_ClearVideo (8);\r
1534                 for (qq = 0,done = false;!done;)\r
1535                 {\r
1536                         if(scaninfo[qq].scan->attributes & PURGEBITS)\r
1537                         {\r
1538                                 ccolor = 6;             // dark purple = purgable\r
1539                                 strcpy(scratch1, AAMAGENTA);            // dark purple = purgable\r
1540                                 //printf("%s", AAMAGENTA);\r
1541                         }else{\r
1542                                 ccolor = 2;             // medium blue = non purgable\r
1543                                 strcpy(scratch1, AABLUE);               // medium blue = non purgable\r
1544                                 //printf("%s", AABLUE);\r
1545                         }\r
1546                         if(scaninfo[qq].scan->attributes & LOCKBIT)\r
1547                         {\r
1548                                 ccolor = 1;             // red = locked\r
1549                                 strcpy(scratch1, AARED);                // red = locked\r
1550                                 //printf("%s", AARED);\r
1551                         }\r
1552                         end = scaninfo[qq].scan->length-1;\r
1553 /*typedef struct mmblockstruct{\r
1554         word    start,length;\r
1555         unsigned        attributes;\r
1556         memptr          *useptr;        // pointer to the segment start\r
1557         struct mmblockstruct far *next;\r
1558 } mmblocktype;*/\r
1559                         //modexprint(page, x, y, t, tlsw, color, bgcolor, vidsw, const byte *str);\r
1560 #define MMSMPRINTMEMINFO modexprint(&(gvar->video.page[0]), xpos, ypos, 1, 1, ccolor, 8, gvar->video.VL_Started, global_temp_status_text); ypos+=8;\r
1561                         if(gvar->video.VL_Started)\r
1562                         {\r
1563                                 VL_ShowPage(&gvar->video.page[0], 1, 0);\r
1564                                 modexClearRegion(&gvar->video.page[0], 0, 0, gvar->video.page[0].width, gvar->video.page[0].height, 8);\r
1565                         }else clrscr();\r
1566                         sprintf(global_temp_status_text, "block #%04u", qq); MMSMPRINTMEMINFO\r
1567 //                      sprintf(global_temp_status_text, "%Fp", scaninfo[qq].scan->useptr); MMSMPRINTMEMINFO\r
1568                         sprintf(global_temp_status_text, "start:  %04x", (unsigned)scaninfo[qq].scan->start); MMSMPRINTMEMINFO\r
1569                         sprintf(global_temp_status_text, "useptr: %04x", (unsigned)scaninfo[qq].scan->useptr); MMSMPRINTMEMINFO\r
1570                         sprintf(global_temp_status_text, "size: %05u", (unsigned)scaninfo[qq].scan->length); MMSMPRINTMEMINFO\r
1571                         if (scaninfo[qq].scan->next && scaninfo[qq].scan->next->start > end+1)\r
1572                         {\r
1573                                 sprintf(global_temp_status_text, "free: %05u", (unsigned)(scaninfo[qq].scan->next->start-scaninfo[qq].scan->start)); MMSMPRINTMEMINFO\r
1574                         }\r
1575                         if(gvar->video.VL_Started)\r
1576                         {\r
1577                                 y = ypos;//scaninfo[qq].scan->start/width;\r
1578                                 x = xpos;//scaninfo[qq].scan->start%width;\r
1579                                 VW_Hlin(x,x+end,y,ccolor,gvar);\r
1580                                 VL_Plot(x,y,5,gvar);\r
1581                         }\r
1582                         else\r
1583                         {\r
1584                                 printf("%s", scratch1);\r
1585                                 printf("%s", AAGREY); printf("_");\r
1586                                 for(w=(scaninfo[qq].scan->start)/80;w<=end/80;w++)\r
1587                                 {\r
1588                                         //strcat(scratch1, "+");\r
1589                                         printf("+");\r
1590                                 }\r
1591                         }\r
1592 \r
1593 \r
1594                                 if (scaninfo[qq].scan->next && scaninfo[qq].scan->next->start > end+1) if(!gvar->video.VL_Started)\r
1595                                 {\r
1596                                         //strcat(scratch1, AARESET);\r
1597                                         printf("%s", AARESET);\r
1598                                         //strcat(scratch1,AAGREEN);\r
1599                                         printf("%s", AAGREEN);\r
1600                                         for(w=(end+1)/80;w<=((scaninfo[qq].scan->next->start-scaninfo[qq].scan->start)/80);w++)\r
1601                                         {\r
1602                                                 //strcat(scratch1,"0");\r
1603                                                 printf("0");\r
1604                                         }\r
1605                                 }else VW_Hlin(x+end+1,x+(scaninfo[qq].scan->next->start-scaninfo[qq].scan->start),y,3,gvar);    // black = free//now green\r
1606 \r
1607 \r
1608                         if(gvar->video.VL_Started)\r
1609                         {\r
1610                                 //if (scan->next && scan->next->start > end+1) free\r
1611                                 xpos = gvar->video.page[0].dx;\r
1612                                 ypos = gvar->video.page[0].dy;//(gvar->video.page[0].sh-(32));//8*4\r
1613                         }\r
1614                         else\r
1615                         {\r
1616                                 //printf("%s\n", scratch1);\r
1617                                 printf("%s", AARESET);\r
1618                                 printf("\n");\r
1619                         }\r
1620                         while (!(scancode = gvar->in.inst->LastScan)){}\r
1621 \r
1622                         IN_ClearKey(scancode);\r
1623                         switch (scancode)\r
1624                         {\r
1625                                 case sc_LeftArrow:\r
1626                                         if(qq>0) qq--;\r
1627                                         else    qq = maxq;\r
1628                                 break;\r
1629                                 case sc_RightArrow:\r
1630                                         if(qq<maxq) qq++;\r
1631                                         else qq = 0;\r
1632                                 break;\r
1633 /*                              case sc_UpArrow:\r
1634                                         if(qq>0) qq-=100;\r
1635                                         else    qq = maxq;\r
1636                                 break;\r
1637                                 case sc_DownArrow:\r
1638                                         if(qq<maxq) qq+=100;\r
1639                                         else qq = 0;\r
1640                                 break;*/\r
1641                                 case sc_Escape:\r
1642                                         done = true;\r
1643                                 break;\r
1644                         }\r
1645                 }\r
1646         }\r
1647 #endif\r
1648 \r
1649 //==========================================================================\r
1650 \r
1651 /*\r
1652 =====================\r
1653 =\r
1654 = MM_DumpData\r
1655 =\r
1656 =====================\r
1657 */\r
1658 \r
1659 void MM_DumpData (global_game_variables_t *gvar)\r
1660 {\r
1661         mmblocktype far *scan,far *best;\r
1662         long    lowest,oldlowest;\r
1663         unsigned        owner;\r
1664         char    lock,purge;\r
1665         FILE    *dumpfile;\r
1666 \r
1667 #ifdef __WATCOMC__\r
1668         _nfree(gvar->mm.nearheap);\r
1669 #endif\r
1670 #ifdef __BORLANDC__\r
1671         free(gvar->mm.nearheap);\r
1672 #endif\r
1673 #ifdef __BORLANDC__\r
1674                 dumpfile = fopen ("mmdump.16b","w");\r
1675 #endif\r
1676 #ifdef __WATCOMC__\r
1677                 dumpfile = fopen ("mmdump.16w","w");\r
1678 #endif\r
1679         if (!dumpfile){\r
1680                 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");\r
1681                 return;\r
1682         }\r
1683 \r
1684         lowest = -1;\r
1685         do\r
1686         {\r
1687                 oldlowest = lowest;\r
1688                 lowest = 0xffff;\r
1689 \r
1690                 scan = gvar->mm.mmhead;\r
1691                 while (scan)\r
1692                 {\r
1693                         owner = (unsigned)scan->useptr;\r
1694 \r
1695                         if (owner && owner<lowest && owner > oldlowest)\r
1696                         {\r
1697                                 best = scan;\r
1698                                 lowest = owner;\r
1699                         }\r
1700 \r
1701                         scan = scan->next;\r
1702                 }\r
1703 \r
1704                 if (lowest != 0xffff)\r
1705                 {\r
1706                         if (best->attributes & PURGEBITS)\r
1707                                 purge = 'P';\r
1708                         else\r
1709                                 purge = '-';\r
1710                         if (best->attributes & LOCKBIT)\r
1711                                 lock = 'L';\r
1712                         else\r
1713                                 lock = '-';\r
1714                         fprintf (dumpfile,"0x%p (%c%c) = %u\n"\r
1715                         ,(unsigned)lowest,lock,purge,best->length);\r
1716                 }\r
1717 \r
1718         } while (lowest != 0xffff);\r
1719 \r
1720         fclose(dumpfile);\r
1721         printf("MMDUMP.16 created.\n");\r
1722 }\r
1723 \r
1724 //==========================================================================\r
1725 \r
1726 \r
1727 /*\r
1728 ======================\r
1729 =\r
1730 = MM_UnusedMemory\r
1731 =\r
1732 = Returns the total free space without purging\r
1733 =\r
1734 ======================\r
1735 */\r
1736 \r
1737 dword MM_UnusedMemory (global_game_variables_t *gvar)\r
1738 {\r
1739         unsigned free;\r
1740         mmblocktype far *scan;\r
1741 \r
1742         free = 0;\r
1743         scan = gvar->mm.mmhead;\r
1744 \r
1745         while(scan->next)\r
1746         {\r
1747                 free += scan->next->start - (scan->start + scan->length);\r
1748                 scan = scan->next;\r
1749         }\r
1750 \r
1751         return free*16lu;\r
1752 }\r
1753 \r
1754 //==========================================================================\r
1755 \r
1756 \r
1757 /*\r
1758 ======================\r
1759 =\r
1760 = MM_TotalFree\r
1761 =\r
1762 = Returns the total free space with purging\r
1763 =\r
1764 ======================\r
1765 */\r
1766 \r
1767 dword MM_TotalFree (global_game_variables_t *gvar)\r
1768 {\r
1769         unsigned free;\r
1770         mmblocktype far *scan;\r
1771 \r
1772         free = 0;\r
1773         scan = gvar->mm.mmhead;\r
1774 \r
1775         while(scan->next)\r
1776         {\r
1777                 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))\r
1778                         free += scan->length;\r
1779                 free += scan->next->start - (scan->start + scan->length);\r
1780                 scan = scan->next;\r
1781         }\r
1782 \r
1783         return free*16lu;\r
1784 }\r
1785 \r
1786 //==========================================================================\r
1787 \r
1788 /*\r
1789 =====================\r
1790 =\r
1791 = MM_Report\r
1792 =\r
1793 =====================\r
1794 */\r
1795 \r
1796 void MM_Report_ (global_game_variables_t *gvar)\r
1797 {\r
1798         printf("========================================\n");\r
1799         printf("                MM_Report_\n");\r
1800         printf("========================================\n");\r
1801         if(MML_CheckForEMS())\r
1802         {\r
1803                 printf("        %cLIMEMS        %u\n", 0xC9, gvar->pm.emm.EMSPresent);\r
1804                 printf("        %c%cEMM v%x.%x available\n", 0xC7, 0xC4, gvar->pm.emm.EMSVer>>4,gvar->pm.emm.EMSVer&0x0F);\r
1805                 printf("        %c%ctotalEMSpages:      %u      ", 0xC7, 0xC4, gvar->pm.emm.totalEMSpages); printf("freeEMSpages:       %u\n", gvar->pm.emm.freeEMSpages);\r
1806                 printf("        %c%cEMSPageFrame:       %04x\n", 0xC7, 0xC4, gvar->pm.emm.EMSPageFrame);\r
1807                 printf("        %c%cEMSmem:     %lu\n", 0xD3, 0xC4, gvar->mmi.EMSmem);\r
1808         }\r
1809         if(MML_CheckForXMS())\r
1810         {\r
1811                 printf("        %cXMS   %u\n", 0xC9, gvar->pm.xmm.XMSPresent);\r
1812                 printf("        %c%cXMS v%x.%x available\n", 0xC7, 0xC4, XMSVer>>8,XMSVer&0x0F);\r
1813                 printf("        %c%cXMSDriver:  %Fp\n", 0xC7, 0xC4, XMSDriver);\r
1814                 printf("        %c%cXMSHandle:  %04x\n", 0xC7, 0xC4, gvar->pm.xmm.XMSHandle);\r
1815                 printf("        %c%cXMSmem:     %lu\n", 0xD3, 0xC4, gvar->mmi.XMSmem);\r
1816         }\r
1817         printf("        %cConv. %u\n", 0xC9, gvar->pm.mm.MainPresent); DebugMemory_(gvar, 0);\r
1818         //printf("mainmem:      %lu\n", gvar->mmi.mainmem);\r
1819         //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);\r
1820         //printf("                      UnusedMemory:   %lu\n", MM_UnusedMemory(gvar));\r
1821         printf("nearheap:       %lu             ", gvar->mmi.nearheap); printf("farheap:        %lu\n", gvar->mmi.farheap);\r
1822 }\r
1823 \r
1824 //==========================================================================\r
1825 \r
1826 /*\r
1827 =====================\r
1828 =\r
1829 = MM_EMSerr\r
1830 =\r
1831 =====================\r
1832 */\r
1833 \r
1834 void MM_EMSerr(byte *stri, byte err)\r
1835 {\r
1836         //Returns a text string describing the error code in EMS.Error.\r
1837         switch(err)\r
1838         {\r
1839                 case 0x0:\r
1840                         strcat(stri, "successful");\r
1841                 break;\r
1842                 case 0x80:\r
1843                         strcat(stri, "internal error");\r
1844                 break;\r
1845                 case 0x81:\r
1846                         strcat(stri, "hardware malfunction");\r
1847                 break;\r
1848                 case 0x82:\r
1849                         strcat(stri, "busy .. retry later");\r
1850                 break;\r
1851                 case 0x83:\r
1852                         strcat(stri, "invalid handle");\r
1853                 break;\r
1854                 case 0x84:\r
1855                         strcat(stri, "undefined function requested by application");\r
1856                 break;\r
1857                 case 0x85:\r
1858                         strcat(stri, "no more handles available");\r
1859                 break;\r
1860                 case 0x86:\r
1861                         strcat(stri, "error in save or restore of mapping context");\r
1862                 break;\r
1863                 case 0x87:\r
1864                         strcat(stri, "insufficient memory pages in system");\r
1865                 break;\r
1866                 case 0x88:\r
1867                         strcat(stri, "insufficient memory pages available");\r
1868                 break;\r
1869                 case 0x89:\r
1870                         strcat(stri, "zero pages requested");\r
1871                 break;\r
1872                 case 0x8A:\r
1873                         strcat(stri, "invalid logical page number encountered");\r
1874                 break;\r
1875                 case 0x8B:\r
1876                         strcat(stri, "invalid physical page number encountered");\r
1877                 break;\r
1878                 case 0x8C:\r
1879                         strcat(stri, "page-mapping hardware state save area is full");\r
1880                 break;\r
1881                 case 0x8D:\r
1882                         strcat(stri, "save of mapping context failed");\r
1883                 break;\r
1884                 case 0x8E:\r
1885                         strcat(stri, "restore of mapping context failed");\r
1886                 break;\r
1887                 case 0x8F:\r
1888                         strcat(stri, "undefined subfunction");\r
1889                 break;\r
1890                 case 0x90:\r
1891                         strcat(stri, "undefined attribute type");\r
1892                 break;\r
1893                 case 0x91:\r
1894                         strcat(stri, "feature not supported");\r
1895                 break;\r
1896                 case 0x92:\r
1897                         strcat(stri, "successful, but a portion of the source region has been overwritten");\r
1898                 break;\r
1899                 case 0x93:\r
1900                         strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");\r
1901                 break;\r
1902                 case 0x94:\r
1903                         strcat(stri, "conventional and expanded memory regions overlap");\r
1904                 break;\r
1905                 case 0x95:\r
1906                         strcat(stri, "offset within logical page exceeds size of logical page");\r
1907                 break;\r
1908                 case 0x96:\r
1909                         strcat(stri, "region length exceeds 1 MB");\r
1910                 break;\r
1911                 case 0x97:\r
1912                         strcat(stri, "source and destination EMS regions have same handle and overlap");\r
1913                 break;\r
1914                 case 0x98:\r
1915                         strcat(stri, "memory source or destination type undefined");\r
1916                 break;\r
1917                 case 0x9A:\r
1918                         strcat(stri, "specified alternate map register or DMA register set not supported");\r
1919                 break;\r
1920                 case 0x9B:\r
1921                         strcat(stri, "all alternate map register or DMA register sets currently allocated");\r
1922                 break;\r
1923                 case 0x9C:\r
1924                         strcat(stri, "alternate map register or DMA register sets not supported");\r
1925                 break;\r
1926                 case 0x9D:\r
1927                         strcat(stri, "undefined or unallocated alternate map register or DMA register set");\r
1928                 break;\r
1929                 case 0x9E:\r
1930                         strcat(stri, "dedicated DMA channels not supported");\r
1931                 break;\r
1932                 case 0x9F:\r
1933                         strcat(stri, "specified dedicated DMA channel not supported");\r
1934                 break;\r
1935                 case 0xA0:\r
1936                         strcat(stri, "no such handle name");\r
1937                 break;\r
1938                 case 0xA1:\r
1939                         strcat(stri, "a handle found had no name, or duplicate handle name");\r
1940                 break;\r
1941                 case 0xA2:\r
1942                         strcat(stri, "attempted to wrap around 1M conventional address space");\r
1943                 break;\r
1944                 case 0xA3:\r
1945                         strcat(stri, "source array corrupted");\r
1946                 break;\r
1947                 case 0xA4:\r
1948                         strcat(stri, "operating system denied access");\r
1949                 break;\r
1950                 default:\r
1951                         strcat(stri, "undefined error");\r
1952         }\r
1953 }\r
1954 \r
1955 //==========================================================================\r
1956 \r
1957 /*\r
1958 =====================\r
1959 =\r
1960 = MM_BombOnError\r
1961 =\r
1962 =====================\r
1963 */\r
1964 \r
1965 void MM_BombOnError (boolean bomb, global_game_variables_t *gvar)\r
1966 {\r
1967         gvar->mm.bombonerror = bomb;\r
1968 }\r
1969 \r
1970 #if 0\r
1971 void MM_GetNewBlock(global_game_variables_t *gvar)\r
1972 {\r
1973         if(!gvar->mm.mmfree)\r
1974                 MML_ClearBlock(gvar);\r
1975         gvar->mm.mmnew=gvar->mm.mmfree;\r
1976         gvar->mm.mmfree=gvar->mm.mmfree->next;\r
1977         if(!(gvar->mm.mmnew=gvar->mm.mmfree))\r
1978         {\r
1979                 printf("MM_GETNEWBLOCK: No free blocks!\n");\r
1980                 return;\r
1981         }\r
1982         gvar->mm.mmfree=gvar->mm.mmfree->next;\r
1983 }\r
1984 \r
1985 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)\r
1986 {\r
1987         x->useptr=NULL;\r
1988         x->next=gvar->mm.mmfree;\r
1989         gvar->mm.mmfree=x;\r
1990 }\r
1991 #endif\r
1992 \r
1993 void xms_call(byte v, global_game_variables_t *gvar)\r
1994 {\r
1995         dword XMSDriver = gvar->pm.xmm.XMSDriver;\r
1996         __asm {\r
1997                 mov     ah,[v]\r
1998                 call [DWORD PTR XMSDriver]\r
1999         }\r
2000 }\r
2001 \r
2002 /*void MM_seguin(void)\r
2003 {\r
2004         __asm {\r
2005                 push    ds\r
2006                 mov     ax,ds\r
2007                 inc             ax\r
2008                 mov     ds,ax\r
2009         }\r
2010 }\r
2011 \r
2012 void MM_segude(void)\r
2013 {\r
2014         __asm {\r
2015                 pop ds\r
2016         }\r
2017 }*/\r
2018 \r
2019 /*\r
2020 pull data from far and put it into ds var\r
2021 mov ax,es:si\r
2022 mov x,ax\r
2023 */\r
2024 /*\r
2025 ss stack segment\r
2026 sp top of stack\r
2027 bp bottem of stack\r
2028 */\r