1 /* Project 16 Source Code~
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2 * Copyright (C) 2012-2017 sparky4 & pngwen & andrius4669 & joncampbell123 & yakui-lover
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4 * This file is part of Project 16.
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6 * Project 16 is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 3 of the License, or
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9 * (at your option) any later version.
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11 * Project 16 is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>, or
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18 * write to the Free Software Foundation, Inc., 51 Franklin Street,
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19 * Fifth Floor, Boston, MA 02110-1301 USA.
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26 =============================================================================
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28 ID software memory manager
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29 --------------------------
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31 Primary coder: John Carmack
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35 Quit (global_game_variables_t *gvar, char *error) function
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40 MM_SizePtr to change the size of a given pointer
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42 Multiple purge levels utilized
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44 EMS / XMS unmanaged routines
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46 =============================================================================
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50 Open Watcom port by sparky4
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53 #include "src/lib/16_mm.h"
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54 #include "src/lib/16_ca.h"
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62 =============================================================================
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66 =============================================================================
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69 #define LOCKBIT 0x80 // if set in attributes, block cannot be moved
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70 #define PURGEBITS 3 // 0-3 level, 0= unpurgable, 3= purge first
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71 #define PURGEMASK 0xfffc
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72 #define BASEATTRIBUTES 0 // unlocked, non purgable
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74 //#define MAXUMBS 10
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76 /*typedef struct mmblockstruct
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78 unsigned start,length;
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79 unsigned attributes;
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80 memptr *useptr; // pointer to the segment start
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81 struct mmblockstruct far *next;
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85 //#define GETNEWBLOCK {if(!(mmnew=mmfree))Quit("MM_GETNEWBLOCK: No free blocks!") ;mmfree=mmfree->next;}
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88 #define GETNEWBLOCK {if(!gvar->mm.mmfree)MML_ClearBlock(gvar);gvar->mm.mmnew=gvar->mm.mmfree;gvar->mm.mmfree=gvar->mm.mmfree->next;}
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90 #define FREEBLOCK(x) {*x->useptr=NULL;x->next=gvar->mm.mmfree;gvar->mm.mmfree=x;}
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93 =============================================================================
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97 =============================================================================
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100 /*mminfotype mminfo;
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104 void (* beforesort) (void);
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105 void (* aftersort) (void);
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108 =============================================================================
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112 =============================================================================
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115 /*boolean mmstarted;
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120 mmblocktype far mmblocks[MAXBLOCKS]
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121 ,far *mmhead,far *mmfree,far *mmrover,far *mmnew;
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123 boolean bombonerror;*/
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125 //unsigned totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle;
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127 void (* XMSaddr) (void); // far pointer to XMS driver
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129 /*unsigned numUMBs,UMBbase[MAXUMBS];*/
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131 //==========================================================================
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134 // local prototypes
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137 boolean MML_CheckForEMS (void);
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138 void MML_ShutdownEMS (void);
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139 void MM_MapEMS (void);
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140 boolean MML_CheckForXMS (void);
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141 void MML_ShutdownXMS (void);
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142 //void MML_UseSpace (unsigned segstart, unsigned seglength);
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143 //void MML_ClearBlock (void);
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145 //==========================================================================
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148 static char *ParmStringsexmm[] = {"noems","noxms",""};
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152 ======================
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156 = Routine from p36 of Extending DOS
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158 =======================
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161 boolean MML_CheckForEMS(void)
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163 boolean emmcfems = false;
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164 word EMSPageFrame = 0;
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165 byte err=0, str[64];
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166 static char emmname[] = "EMMXXXX0"; //fix by andrius4669
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168 mov dx,OFFSET emmname //fix by andrius4669
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170 int EMM_INT // try to open EMMXXXX0 device
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176 int EMM_INT // get device info
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184 int EMM_INT // get status
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190 int EMM_INT // close handle
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196 mov ah,EMS_GETFRAME
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197 int EMS_INT // find the page frame address
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200 mov [EMSPageFrame],bx
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207 #ifdef __BORLANDC__
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211 #ifdef __BORLANDC__
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219 #ifdef __BORLANDC__
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228 // Pageframe switch to determine if there is one!
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233 #if defined(__DEBUG_PM__) || defined(__DEBUG_MM__)
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234 printf("MML_CheckForEMS: EMS error No Pageframe!\nAddress detected to be %04x\n", EMSPageFrame);
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236 }else if(!emmcfems)// if there is an error and page frame is not 0000
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238 strcpy(str,"MML_CheckForEMS: EMS error ");
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239 MM_EMSerr(str, err);
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240 printf("%s\n",str);
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249 ======================
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253 =======================
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256 byte MML_SetupEMS(global_game_variables_t *gvar)
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260 boolean errorflag=false;
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262 unsigned int EMSVer = 0;
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264 unsigned totalEMSpages,freeEMSpages,EMSPageFrame,EMSpagesmapped,EMSHandle;
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265 totalEMSpages = freeEMSpages = EMSPageFrame = EMSpagesmapped = 0;
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269 int EMS_INT // make sure EMS hardware is present
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271 //mov [EMS_status],ah
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278 mov [EMSVer],ax // set EMSVer
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279 cmp al,0x32 // only work on ems 3.2 or greater
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282 mov ah,EMS_GETFRAME
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283 int EMS_INT // find the page frame address
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286 mov [EMSPageFrame],bx
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288 mov ah,EMS_GETPAGES
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289 int EMS_INT // find out how much EMS is there
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292 mov [totalEMSpages],dx
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293 mov [freeEMSpages],bx
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295 jz noEMS // no EMS at all to allocate
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299 cmp bx,[freeEMSpages]
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301 mov bx,[freeEMSpages]
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303 #ifdef __BORLANDC__
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307 #ifdef __BORLANDC__
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311 jle getpages // there is only 1,2,3,or 4 pages
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312 mov bx,4 // we can't use more than 4 pages
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313 #ifdef __BORLANDC__
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317 #ifdef __BORLANDC__
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320 mov [EMSpagesmapped],bx
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321 mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS
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327 #ifdef __BORLANDC__
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331 #ifdef __BORLANDC__
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337 #ifdef __BORLANDC__
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345 if(errorflag==true)
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347 strcpy(str,"MM_SetupEMS: EMS error ");
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348 MM_EMSerr(str, err);
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349 printf("%s\n",str);
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352 gvar->mm.totalEMSpages=totalEMSpages;
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353 gvar->mm.freeEMSpages=freeEMSpages;
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354 gvar->mm.EMSPageFrame=EMSPageFrame;
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355 gvar->mm.EMSpagesmapped=EMSpagesmapped;
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356 gvar->mm.EMSHandle=EMSHandle;
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357 gvar->mm.EMSVer=EMSVer;
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363 ======================
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367 =======================
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370 void MML_ShutdownEMS(global_game_variables_t *gvar)
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372 boolean errorflag=false;
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373 unsigned EMSHandle=gvar->mm.EMSHandle;
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378 mov ah,EMS_FREEPAGES
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384 #ifdef __BORLANDC__
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391 if(errorflag==true)
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392 Quit (gvar, "MML_ShutdownEMS: Error freeing EMS!\n"); //++++ add something
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396 ====================
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400 = Maps the 64k of EMS used by memory manager into the page frame
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401 = for general use. This only needs to be called if you are keeping
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402 = other things in EMS.
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404 ====================
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407 byte MM_MapEMS(global_game_variables_t *gvar)
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410 unsigned EMSHandle;
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412 boolean errorflag=false;
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414 EMSHandle=gvar->mm.EMSHandle;
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416 for (i=0;i<4/*MAPPAGES*/;i++)
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420 mov bx,[i] // logical page
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421 mov al,bl // physical page
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422 mov dx,[EMSHandle] // handle
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427 #ifdef __BORLANDC__
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431 #ifdef __BORLANDC__
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436 #ifdef __BORLANDC__
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443 if(errorflag==true)
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445 strcpy(str,"MM_MapEMS: EMS error ");
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446 MM_EMSerr(str, err);
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447 printf("%s\n",str);
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451 gvar->mmi.EMSmem = (i)*0x4000lu;
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455 byte MM_MapXEMS(global_game_variables_t *gvar)
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457 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
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459 //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
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460 //PhysicalStart = Physical page first logical page is mapped to
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461 //LogicalStart = First logical page to map
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462 //NumPages = Number of pages to map (1 to 4)
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463 //Handle = EMS handle logical pages are allocated to
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465 /*//Create a buffer containing the page information
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466 // FOR x = 0 TO NumPages - 1
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467 // MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
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470 // Regs.ax = 0x5000 //Map the pages in the buffer
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471 // Regs.cx = NumPages //to the pageframe
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472 // Regs.dx = Handle
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473 // Regs.ds = VARSEG(MapInfo$)
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474 // Regs.si = SADD(MapInfo$)
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475 // InterruptX 0x67, Regs, Regs
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476 // EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100 //Store the status code
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482 boolean errorflag=false;
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484 EMSHandle=gvar->mm.EMSHandle;
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486 if(gvar->mm.EMSVer<0x40)
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489 for (i=0;i<MAPPAGES;i++)
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492 mov ah,EMS_MAPXPAGE
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493 mov cx,[i] // logical page
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494 mov al,bl // physical page
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495 mov dx,[EMSHandle] // handle
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500 #ifdef __BORLANDC__
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504 #ifdef __BORLANDC__
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509 #ifdef __BORLANDC__
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516 if(errorflag==true)
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518 //strcpy(str,"MM_MapXEMS: EMS error 0x");
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519 strcpy(str,"MM_MapXEMS: EMS error ");
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520 //itoa(err,str2,16);
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521 MM_EMSerr(str, err);
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522 printf("%s\n",str);
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523 //printf("%s%x\n",str, err);
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524 //printf("FACK! %x\n", err);
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528 gvar->mmi.EMSmem = (i)*0x4000lu;
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533 //==========================================================================
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536 ======================
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540 = Check for XMM driver
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542 =======================
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545 boolean MML_CheckForXMS(void)
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548 boolean errorflag=false;
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552 int 0x2f // query status of installed diver
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556 #ifdef __BORLANDC__
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563 if(errorflag==true) return false;
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570 ======================
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574 = Try to allocate all upper memory block
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576 =======================
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579 void MML_SetupXMS(global_game_variables_t *gvar)
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587 mov [WORD PTR XMSaddr],bx
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588 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
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592 mov ah,XMS_ALLOCUMB
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593 mov dx,0xffff // try for largest block possible
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594 //mov ax,dx // Set available Kbytes.
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595 call [DWORD PTR XMSaddr]
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599 cmp bl,0xb0 // error: smaller UMB is available
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602 mov ah,XMS_ALLOCUMB
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603 call [DWORD PTR XMSaddr] // DX holds largest available UMB
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605 jz done // another error...
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606 #ifdef __BORLANDC__
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610 #ifdef __BORLANDC__
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615 #ifdef __BORLANDC__
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622 // printf("base=%u ", base); printf("size=%u\n", size);
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623 MML_UseSpace(base,size, gvar);
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624 gvar->mmi.XMSmem += size*16;
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625 gvar->mm.UMBbase[gvar->mm.numUMBs] = base;
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626 gvar->mm.numUMBs++;
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627 if(gvar->mm.numUMBs < MAXUMBS)
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633 ======================
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637 ======================
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640 void MML_ShutdownXMS(global_game_variables_t *gvar)
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645 for (i=0;i<gvar->mm.numUMBs;i++)
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647 base = gvar->mm.UMBbase[i];
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651 call [DWORD PTR XMSaddr]
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657 //==========================================================================
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660 ======================
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664 = Marks a range of paragraphs as usable by the memory manager
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665 = This is used to mark space for the near heap, far heap, ems page frame,
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666 = and upper memory blocks
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668 ======================
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672 extra = oldend - (segstart+seglength);
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676 //++++emsver stuff!
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677 if(segm>1)/// || extra>=0x10000lu)
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678 //if(extra>0xfffflu)
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682 //MML_UseSpace(segstart, seglength, gvar);
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684 printf("MML_UseSpace: Segment spans two blocks!\n");
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686 printf("segm=%u ", segm);
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687 printf("ex=%lu ", extra);
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688 printf("old=%u ", oldend);
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689 printf("start+seglen=%lu\n", segstart+seglength);
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690 printf("segsta=%x ", segstart);
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691 printf("len=%lu ", scan->length);
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692 printf("seglen=%lu ", seglength);
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693 printf("segmlen=%lu\n", segmlen);
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695 //++++todo: linked list of segment!
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697 void MML_UseSpace (unsigned segstart, unsigned seglength, global_game_variables_t *gvar)
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699 mmblocktype far *scan,far *last;
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704 scan = last = gvar->mm.mmhead;
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705 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
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708 // search for the block that contains the range of segments
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710 while (scan->start+scan->length < segstart)
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717 // find out how many blocks it spans!
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719 /*for(;seglength>=0x10000;seglength-=0xFFFF)
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721 //printf(" seglen=%lu\n", segmlen);
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726 // take the given range out of the block
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728 oldend = scan->start + scan->length;
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729 extra = oldend - (segstart+seglength);
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731 #ifdef __DEBUG_MM__
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733 printf("========================================\n");
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734 printf("start=%x ", scan->start);
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735 printf("old=%u ", oldend);
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736 printf("start+seglen=%lu\n", segstart+seglength);
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737 printf("segsta=%x ", segstart);
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738 printf("len=%lu ", scan->length);
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739 printf("seglen=%lu ", seglength);
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741 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
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742 printf("========================================\n");
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746 Quit (gvar, "MML_UseSpace: Segment spans two blocks!");
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749 if (segstart == scan->start)
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751 last->next = scan->next; // unlink block
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756 scan->length = segstart-scan->start; // shorten block
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761 gvar->mm.mmnew->useptr = NULL;
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763 gvar->mm.mmnew->next = scan->next;
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764 scan->next = gvar->mm.mmnew;
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765 gvar->mm.mmnew->start = segstart+seglength;
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766 gvar->mm.mmnew->length = extra;
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767 gvar->mm.mmnew->attributes = LOCKBIT;
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768 }//else if(segm>0) goto segu;
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772 //==========================================================================
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775 ====================
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779 = We are out of blocks, so free a purgable block
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781 ====================
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784 void MML_ClearBlock (global_game_variables_t *gvar)
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786 mmblocktype far *scan;//,far *last;
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788 scan = gvar->mm.mmhead->next;
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792 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS) )
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794 MM_FreePtr (scan->useptr, gvar);
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800 Quit (gvar, "MM_ClearBlock: No purgable blocks!\n");
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804 //==========================================================================
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807 ===================
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811 = Grabs all space from turbo with malloc/farmalloc
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812 = Allocates bufferseg misc buffer
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814 ===================
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817 void MM_Startup (global_game_variables_t *gvar)
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822 unsigned segstart,seglength;//,endfree;
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824 if(gvar->mm.mmstarted)
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825 MM_Shutdown (gvar);
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828 if(sizeof(mmblocktype)!=16)
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831 gvar->mm.mmstarted = true;
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832 gvar->mm.bombonerror = true;
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834 // set up the linked list (everything in the free list;
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836 gvar->mm.mmhead = NULL;
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837 gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);
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838 for (i=0;i<MAXBLOCKS-1;i++)
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839 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);
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840 gvar->mm.mmblocks[i].next = NULL;
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843 // locked block of all memory until we punch out free space
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846 gvar->mm.mmhead = gvar->mm.mmnew; // this will allways be the first node
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847 gvar->mm.mmnew->start = 0;
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848 gvar->mm.mmnew->length = 0xffff;
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849 gvar->mm.mmnew->attributes = LOCKBIT;
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850 gvar->mm.mmnew->next = NULL;
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851 gvar->mm.mmrover = gvar->mm.mmhead;
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855 // get all available near conventional memory segments
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860 length=(word)_memavl();//(word)coreleft();
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861 //start = gvar->mm.nearheap = _fmalloc(length);
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863 start = (void __far *)(gvar->mm.nearheap = _nmalloc(length));
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865 #ifdef __BORLANDC__
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866 start = (void far *)(gvar->mm.nearheap = malloc(length));
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869 length -= 16-(FP_OFF(start)&15);
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870 length -= SAVENEARHEAP;
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871 seglength = length / 16; // now in paragraphs
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872 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
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873 MML_UseSpace (segstart,seglength, gvar);
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874 gvar->mmi.nearheap = length;
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875 //0000printf("near: start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, (dword)seglength, length);
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878 // get all available far conventional memory segments
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883 #ifdef __BORLANDC__
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884 // printf("farcoreleft() %lu\n", farcoreleft());
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885 // printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
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888 start = gvar->mm.farheap = _fmalloc(length);//start = gvar->mm.farheap = halloc(length, 1);
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890 length -= 16-(FP_OFF(start)&15);
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891 length -= SAVEFARHEAP;
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892 seglength = length / 16; // now in paragraphs
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893 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
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894 MML_UseSpace (segstart,seglength, gvar);
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895 gvar->mmi.farheap = length;
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896 //0000printf("far: start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, (dword)seglength, length);
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898 gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
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900 #if !defined(__16_PM__)// && defined(__WATCOMC__)
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904 // detect EMS and allocate up to 64K at page frame
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906 gvar->mmi.EMSmem = 0;
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907 //goto emsskip; //0000
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908 for(i = 1;i < _argc;i++)
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910 if(US_CheckParm(_argv[i],ParmStringsexmm) == 0)
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911 goto emsskip; // param NOEMS
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913 if(MML_CheckForEMS())
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915 MML_SetupEMS(gvar); // allocate space
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916 //16_PM: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
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917 MML_UseSpace(gvar->mm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);
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918 //if(gvar->pm.emm.EMSVer<0x40)
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919 MM_MapEMS(gvar); // map in used pages
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921 //MM_MapXEMS(gvar); // map in used pages
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925 // detect XMS and get upper memory blocks
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928 gvar->mmi.XMSmem = 0;
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929 goto xmsskip;//0000
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930 for(i = 1;i < _argc;i++)
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932 if(US_CheckParm( _argv[i],ParmStringsexmm) == 0)
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933 goto xmsskip; // param NOXMS
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935 if(MML_CheckForXMS())
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937 MML_SetupXMS(gvar); // allocate as many UMBs as possible
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945 // allocate the misc buffer
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947 gvar->mm.mmrover = gvar->mm.mmhead; // start looking for space after low block
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949 MM_GetPtr (&(gvar->mm.bufferseg),BUFFERSIZE, gvar);
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952 //==========================================================================
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955 ====================
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959 = Frees all conventional, EMS, and XMS allocated
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961 ====================
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964 void MM_Shutdown (global_game_variables_t *gvar)
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966 if(!(gvar->mm.mmstarted))
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969 _ffree(gvar->mm.farheap);// printf(" far freed\n");
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971 _nfree(gvar->mm.nearheap);// printf(" near freed\n");
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973 #ifdef __BORLANDC__
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974 free(gvar->mm.nearheap);// printf(" near freed\n");
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981 if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf(" EMS freed\n"); }
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982 if(MML_CheckForXMS()){ MML_ShutdownXMS(gvar); }//printf(" XMS freed\n"); }
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990 //==========================================================================
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993 ====================
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997 = Allocates an unlocked, unpurgable block
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999 ====================
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1002 void MM_GetPtr (memptr *baseptr,dword size, global_game_variables_t *gvar)
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1004 mmblocktype far *scan,far *lastscan,far *endscan
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1005 ,far *purge,far *next;
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1007 unsigned needed,startseg;
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1009 needed = (size+15)/16; // convert size from bytes to paragraphs
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1011 GETNEWBLOCK; // fill in start and next after a spot is found
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1012 gvar->mm.mmnew->length = needed;
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1013 gvar->mm.mmnew->useptr = baseptr;
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1014 gvar->mm.mmnew->attributes = BASEATTRIBUTES;
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1015 //if(gvar->mm.mmnew->useptr==NULL){
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1016 #ifdef __DEBUG_MM__
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1017 if(dbg_debugmm>0){
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1018 printf("===============================================================================\n");
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1019 printf(" MM_GetPtr\n");
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1020 printf("===============================================================================\n");
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1022 // printf(" baseptr=%Fp ", baseptr); printf("useptr=%Fp\n", gvar->mm.mmnew->useptr);
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1023 // //printf(" *baseptr=%Fp ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
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1024 // printf(" &baseptr=%Fp ", &baseptr); printf("&useptr=%Fp\n", &(gvar->mm.mmnew->useptr));
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1026 printf(" baseptr=%04x ", baseptr); printf("useptr=%04x\n", gvar->mm.mmnew->useptr);
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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
1030 printf(" size is %lu\n", size);
\r
1033 //Quit (gvar, "gvar->mm.mmnew->useptr==NULL"); }
\r
1036 for (search = 0; search<3; search++)
\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
1048 lastscan = gvar->mm.mmrover;
\r
1049 scan = gvar->mm.mmrover->next;
\r
1053 lastscan = gvar->mm.mmhead;
\r
1054 scan = gvar->mm.mmhead->next;
\r
1055 endscan = gvar->mm.mmrover;
\r
1058 MM_SortMem (gvar);
\r
1059 lastscan = gvar->mm.mmhead;
\r
1060 scan = gvar->mm.mmhead->next;
\r
1065 startseg = lastscan->start + lastscan->length;
\r
1067 while (scan != endscan)
\r
1069 if (scan->start - startseg >= needed)
\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
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
1084 purge = next; // purge another if not at scan
\r
1086 gvar->mm.mmrover = gvar->mm.mmnew;
\r
1087 return; // good allocation!
\r
1091 // if this block is purge level zero or locked, skip past it
\r
1093 if ( (scan->attributes & LOCKBIT)
\r
1094 || !(scan->attributes & PURGEBITS) )
\r
1097 startseg = lastscan->start + lastscan->length;
\r
1101 scan=scan->next; // look at next line
\r
1105 if (gvar->mm.bombonerror)
\r
1107 #ifdef __WATCOMC__
\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
1114 gvar->mm.mmerror = true;
\r
1117 //==========================================================================
\r
1120 ====================
\r
1124 = Deallocates an unlocked, purgable block
\r
1126 ====================
\r
1129 void MM_FreePtr (memptr *baseptr, global_game_variables_t *gvar)
\r
1131 mmblocktype far *scan,far *last;
\r
1133 last = gvar->mm.mmhead;
\r
1134 scan = last->next;
\r
1136 if (baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
\r
1137 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1139 while (scan->useptr != baseptr && scan)
\r
1142 scan = scan->next;
\r
1146 Quit (gvar, "MM_FreePtr: Block not found!");
\r
1148 last->next = scan->next;
\r
1152 //==========================================================================
\r
1155 =====================
\r
1159 = Sets the purge level for a block (locked blocks cannot be made purgable)
\r
1161 =====================
\r
1164 void MM_SetPurge (memptr *baseptr, int purge, global_game_variables_t *gvar)
\r
1166 mmblocktype far *start;
\r
1168 start = gvar->mm.mmrover;
\r
1172 if (gvar->mm.mmrover->useptr == baseptr)
\r
1175 gvar->mm.mmrover = gvar->mm.mmrover->next;
\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
1184 gvar->mm.mmrover->attributes &= ~PURGEBITS;
\r
1185 gvar->mm.mmrover->attributes |= purge;
\r
1188 //==========================================================================
\r
1191 =====================
\r
1195 = Locks / unlocks the block
\r
1197 =====================
\r
1200 void MM_SetLock (memptr *baseptr, boolean locked, global_game_variables_t *gvar)
\r
1202 mmblocktype far *start;
\r
1204 start = gvar->mm.mmrover;
\r
1208 if (gvar->mm.mmrover->useptr == baseptr)
\r
1211 gvar->mm.mmrover = gvar->mm.mmrover->next;
\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
1220 gvar->mm.mmrover->attributes &= ~LOCKBIT;
\r
1221 gvar->mm.mmrover->attributes |= locked*LOCKBIT;
\r
1224 //==========================================================================
\r
1227 =====================
\r
1231 = Throws out all purgable stuff and compresses movable blocks
\r
1233 =====================
\r
1236 void MM_SortMem (global_game_variables_t *gvar)
\r
1238 mmblocktype far *scan,far *last,far *next;
\r
1239 unsigned start,length,source,dest,oldborder;
\r
1240 //++++int playing;
\r
1243 // lock down a currently playing sound
\r
1245 /*++++ playing = SD_SoundPlaying ();
\r
1248 switch (SoundMode)
\r
1251 playing += STARTPCSOUNDS;
\r
1254 playing += STARTADLIBSOUNDS;
\r
1257 MM_SetLock(MEMPTRCONV audiosegs[playing],true);
\r
1262 #ifdef __WATCOMC__
\r
1263 oldborder = gvar->video.bordercolor;
\r
1264 gvar->video.bordercolor = VL_modexPalOverscan(gvar->video.palette, 4);
\r
1270 scan = gvar->mm.mmhead;
\r
1272 last = NULL; // shut up compiler warning
\r
1276 if (scan->attributes & LOCKBIT)
\r
1279 // block is locked, so try to pile later blocks right after it
\r
1281 start = scan->start + scan->length;
\r
1285 if (scan->attributes & PURGEBITS)
\r
1288 // throw out the purgable block
\r
1290 next = scan->next;
\r
1291 FREEBLOCK(scan); //MM_FreeBlock(scan, gvar);
\r
1292 last->next = next;
\r
1299 // push the non purgable block on top of the last moved block
\r
1301 if (scan->start != start)
\r
1303 length = scan->length;
\r
1304 source = scan->start;
\r
1306 while (length > 0xf00)
\r
1308 movedata(source,0,dest,0,0xf00*16);
\r
1313 movedata(source,0,dest,0,length*16);
\r
1315 scan->start = start;
\r
1316 *(unsigned *)scan->useptr = start;
\r
1318 start = scan->start + scan->length;
\r
1323 scan = scan->next; // go to next block
\r
1326 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1331 VL_ColorBorder (oldborder, &gvar->video);
\r
1333 /*++++ if(playing)
\r
1334 MM_SetLock((memptr *)&audiosegs[playing],false);*/
\r
1337 //==========================================================================
\r
1340 =====================
\r
1344 =====================
\r
1347 #ifdef __WATCOMC__
\r
1348 //#define MMSMPANVID
\r
1349 #define MMSMSCANINFO
\r
1352 void MM_ShowMemory (global_game_variables_t *gvar)
\r
1354 mmblocktype far *scan;
\r
1355 unsigned color,temp,x,y ,w,q,width;
\r
1357 byte scratch[160],scratch0[4096],str[16];
\r
1358 mmshowmemoryinfo_t scaninfo[MAXBLOCKS];
\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
1370 width = gvar->video.page[0].width; q = 0;
\r
1372 CA_OpenDebug (gvar);
\r
1375 scaninfo[q].scan = scan;
\r
1376 strcpy(scratch, AARESET);
\r
1377 if(scan->attributes & PURGEBITS)
\r
1379 color = 6; // dark purple = purgable
\r
1380 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
\r
1382 color = 2; // medium blue = non purgable
\r
1383 strcpy(scratch0, AABLUE); // medium blue = non purgable
\r
1385 if(scan->attributes & LOCKBIT)
\r
1387 color = 1; // red = locked
\r
1388 strcpy(scratch0, AARED); // red = locked
\r
1390 if (scan->start<=end)
\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
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
1413 //printf("+ %u %lu\n", w, scan->length);
\r
1414 strcat(scratch0, "+");
\r
1417 if (scan->next && scan->next->start > end+1)
\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
1425 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
\r
1426 strcat(scratch0,"0");
\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
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
1441 //printf("0 %x %x %u\n", scan->start, w);
\r
1442 strcat(scratch0,"0");
\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
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
1469 scan = scan->next;
\r
1471 //if(color!=6) IN_Ack(gvar);
\r
1474 CA_CloseDebug (gvar);
\r
1478 int dx,dy,odx,ody;
\r
1479 odx = gvar->video.page[0].dx;
\r
1480 ody = gvar->video.page[0].dy;
\r
1482 while(!gvar->in.inst->Keyboard[sc_Escape])
\r
1484 if(gvar->in.inst->Keyboard[sc_UpArrow])
\r
1489 else if(gvar->in.inst->Keyboard[sc_DownArrow])
\r
1491 if(dy<gvar->video.page[0].height-gvar->video.page[0].sh)
\r
1494 if(gvar->in.inst->Keyboard[sc_LeftArrow])
\r
1499 else if(gvar->in.inst->Keyboard[sc_RightArrow])
\r
1501 if(dx<gvar->video.page[0].width-gvar->video.page[0].sw)
\r
1505 modexPanPage(&gvar->video.page[0], dx, dy);
\r
1506 VL_ShowPage(&gvar->video.page[0], 1, 1);
\r
1509 gvar->video.page[0].dx = odx;
\r
1510 gvar->video.page[0].dy = ody;
\r
1513 #ifdef MMSMSCANINFO
\r
1514 MM_ShowMemoryDetail (x, y, w, q, end, &scaninfo, gvar);
\r
1518 if(gvar->video.VL_Started) IN_Ack(gvar);
\r
1520 gvar->video.BOFS = (byte __far *)temp;
\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
1527 unsigned maxq = q;
\r
1529 ScanCode scancode;
\r
1531 word qq, ccolor = 3;
\r
1533 // VL_ClearVideo (8);
\r
1534 for (qq = 0,done = false;!done;)
\r
1536 if(scaninfo[qq].scan->attributes & PURGEBITS)
\r
1538 ccolor = 6; // dark purple = purgable
\r
1539 strcpy(scratch1, AAMAGENTA); // dark purple = purgable
\r
1540 //printf("%s", AAMAGENTA);
\r
1542 ccolor = 2; // medium blue = non purgable
\r
1543 strcpy(scratch1, AABLUE); // medium blue = non purgable
\r
1544 //printf("%s", AABLUE);
\r
1546 if(scaninfo[qq].scan->attributes & LOCKBIT)
\r
1548 ccolor = 1; // red = locked
\r
1549 strcpy(scratch1, AARED); // red = locked
\r
1550 //printf("%s", AARED);
\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
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
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
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
1573 sprintf(global_temp_status_text, "free: %05u", (unsigned)(scaninfo[qq].scan->next->start-scaninfo[qq].scan->start)); MMSMPRINTMEMINFO
\r
1575 if(gvar->video.VL_Started)
\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
1584 printf("%s", scratch1);
\r
1585 printf("%s", AAGREY); printf("_");
\r
1586 for(w=(scaninfo[qq].scan->start)/80;w<=end/80;w++)
\r
1588 //strcat(scratch1, "+");
\r
1594 if (scaninfo[qq].scan->next && scaninfo[qq].scan->next->start > end+1) if(!gvar->video.VL_Started)
\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
1602 //strcat(scratch1,"0");
\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
1608 if(gvar->video.VL_Started)
\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
1616 //printf("%s\n", scratch1);
\r
1617 printf("%s", AARESET);
\r
1620 while (!(scancode = gvar->in.inst->LastScan)){}
\r
1622 IN_ClearKey(scancode);
\r
1625 case sc_LeftArrow:
\r
1629 case sc_RightArrow:
\r
1633 /* case sc_UpArrow:
\r
1637 case sc_DownArrow:
\r
1638 if(qq<maxq) qq+=100;
\r
1649 //==========================================================================
\r
1652 =====================
\r
1656 =====================
\r
1659 void MM_DumpData (global_game_variables_t *gvar)
\r
1661 mmblocktype far *scan,far *best;
\r
1662 long lowest,oldlowest;
\r
1667 #ifdef __WATCOMC__
\r
1668 _nfree(gvar->mm.nearheap);
\r
1670 #ifdef __BORLANDC__
\r
1671 free(gvar->mm.nearheap);
\r
1673 #ifdef __BORLANDC__
\r
1674 dumpfile = fopen ("mmdump.16b","w");
\r
1676 #ifdef __WATCOMC__
\r
1677 dumpfile = fopen ("mmdump.16w","w");
\r
1680 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
\r
1687 oldlowest = lowest;
\r
1690 scan = gvar->mm.mmhead;
\r
1693 owner = (unsigned)scan->useptr;
\r
1695 if (owner && owner<lowest && owner > oldlowest)
\r
1701 scan = scan->next;
\r
1704 if (lowest != 0xffff)
\r
1706 if (best->attributes & PURGEBITS)
\r
1710 if (best->attributes & LOCKBIT)
\r
1714 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
\r
1715 ,(unsigned)lowest,lock,purge,best->length);
\r
1718 } while (lowest != 0xffff);
\r
1721 printf("MMDUMP.16 created.\n");
\r
1724 //==========================================================================
\r
1728 ======================
\r
1732 = Returns the total free space without purging
\r
1734 ======================
\r
1737 dword MM_UnusedMemory (global_game_variables_t *gvar)
\r
1740 mmblocktype far *scan;
\r
1743 scan = gvar->mm.mmhead;
\r
1747 free += scan->next->start - (scan->start + scan->length);
\r
1748 scan = scan->next;
\r
1754 //==========================================================================
\r
1758 ======================
\r
1762 = Returns the total free space with purging
\r
1764 ======================
\r
1767 dword MM_TotalFree (global_game_variables_t *gvar)
\r
1770 mmblocktype far *scan;
\r
1773 scan = gvar->mm.mmhead;
\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
1786 //==========================================================================
\r
1789 =====================
\r
1793 =====================
\r
1796 void MM_Report_ (global_game_variables_t *gvar)
\r
1798 printf("========================================\n");
\r
1799 printf(" MM_Report_\n");
\r
1800 printf("========================================\n");
\r
1801 if(MML_CheckForEMS())
\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
1809 if(MML_CheckForXMS())
\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);
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1815 printf(" %c%cXMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.XMSmem);
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1817 printf(" %cConv. %u\n", 0xC9, gvar->pm.mm.MainPresent); DebugMemory_(gvar, 0);
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1818 //printf("mainmem: %lu\n", gvar->mmi.mainmem);
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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);
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1820 //printf(" UnusedMemory: %lu\n", MM_UnusedMemory(gvar));
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1821 printf("nearheap: %lu ", gvar->mmi.nearheap); printf("farheap: %lu\n", gvar->mmi.farheap);
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1824 //==========================================================================
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1827 =====================
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1831 =====================
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1834 void MM_EMSerr(byte *stri, byte err)
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1836 //Returns a text string describing the error code in EMS.Error.
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1840 strcat(stri, "successful");
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1843 strcat(stri, "internal error");
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1846 strcat(stri, "hardware malfunction");
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1849 strcat(stri, "busy .. retry later");
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1852 strcat(stri, "invalid handle");
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1855 strcat(stri, "undefined function requested by application");
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1858 strcat(stri, "no more handles available");
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1861 strcat(stri, "error in save or restore of mapping context");
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1864 strcat(stri, "insufficient memory pages in system");
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1867 strcat(stri, "insufficient memory pages available");
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1870 strcat(stri, "zero pages requested");
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1873 strcat(stri, "invalid logical page number encountered");
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1876 strcat(stri, "invalid physical page number encountered");
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1879 strcat(stri, "page-mapping hardware state save area is full");
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1882 strcat(stri, "save of mapping context failed");
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1885 strcat(stri, "restore of mapping context failed");
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1888 strcat(stri, "undefined subfunction");
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1891 strcat(stri, "undefined attribute type");
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1894 strcat(stri, "feature not supported");
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1897 strcat(stri, "successful, but a portion of the source region has been overwritten");
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1900 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
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1903 strcat(stri, "conventional and expanded memory regions overlap");
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1906 strcat(stri, "offset within logical page exceeds size of logical page");
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1909 strcat(stri, "region length exceeds 1 MB");
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1912 strcat(stri, "source and destination EMS regions have same handle and overlap");
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1915 strcat(stri, "memory source or destination type undefined");
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1918 strcat(stri, "specified alternate map register or DMA register set not supported");
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1921 strcat(stri, "all alternate map register or DMA register sets currently allocated");
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1924 strcat(stri, "alternate map register or DMA register sets not supported");
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1927 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
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1930 strcat(stri, "dedicated DMA channels not supported");
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1933 strcat(stri, "specified dedicated DMA channel not supported");
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1936 strcat(stri, "no such handle name");
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1939 strcat(stri, "a handle found had no name, or duplicate handle name");
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1942 strcat(stri, "attempted to wrap around 1M conventional address space");
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1945 strcat(stri, "source array corrupted");
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1948 strcat(stri, "operating system denied access");
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1951 strcat(stri, "undefined error");
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1955 //==========================================================================
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1958 =====================
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1962 =====================
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1965 void MM_BombOnError (boolean bomb, global_game_variables_t *gvar)
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1967 gvar->mm.bombonerror = bomb;
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1971 void MM_GetNewBlock(global_game_variables_t *gvar)
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1973 if(!gvar->mm.mmfree)
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1974 MML_ClearBlock(gvar);
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1975 gvar->mm.mmnew=gvar->mm.mmfree;
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1976 gvar->mm.mmfree=gvar->mm.mmfree->next;
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1977 if(!(gvar->mm.mmnew=gvar->mm.mmfree))
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1979 printf("MM_GETNEWBLOCK: No free blocks!\n");
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1982 gvar->mm.mmfree=gvar->mm.mmfree->next;
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1985 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
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1988 x->next=gvar->mm.mmfree;
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1989 gvar->mm.mmfree=x;
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1993 void xms_call(byte v, global_game_variables_t *gvar)
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1995 dword XMSDriver = gvar->pm.xmm.XMSDriver;
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1998 call [DWORD PTR XMSDriver]
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2002 /*void MM_seguin(void)
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2012 void MM_segude(void)
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2020 pull data from far and put it into ds var
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2027 bp bottem of stack
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