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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63 =============================================================================
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67 =============================================================================
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70 //#define LOCKBIT 0x80 // if set in attributes, block cannot be moved
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71 //#define PURGEBITS 3 // 0-3 level, 0= unpurgable, 3= purge first
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72 //#define PURGEMASK 0xfffc
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73 //#define BASEATTRIBUTES 0 // unlocked, non purgable
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75 //#define MAXUMBS 10
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77 /*typedef struct mmblockstruct
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79 unsigned start,length;
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80 unsigned attributes;
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81 memptr *useptr; // pointer to the segment start
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82 struct mmblockstruct far *next;
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86 //#define GETNEWBLOCK {if(!(mmnew=mmfree))Quit("MM_GETNEWBLOCK: No free blocks!") ;mmfree=mmfree->next;}
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89 //#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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91 //#define FREEBLOCK(x) {*x->useptr=NULL;x->next=gvar->mm.mmfree;gvar->mm.mmfree=x;}
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94 =============================================================================
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98 =============================================================================
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101 /*mminfotype mminfo;
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105 void (* beforesort) (void);
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106 void (* aftersort) (void);
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109 =============================================================================
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113 =============================================================================
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116 /*boolean mmstarted;
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121 mmblocktype far mmblocks[MAXBLOCKS]
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122 ,far *mmhead,far *mmfree,far *mmrover,far *mmnew;
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124 boolean bombonerror;*/
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126 //unsigned totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle;
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128 void (* XMSaddr) (void); // far pointer to XMS driver
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130 /*unsigned numUMBs,UMBbase[MAXUMBS];*/
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132 //==========================================================================
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135 // local prototypes
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138 boolean MML_CheckForEMS (void);
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139 void MML_ShutdownEMS (void);
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140 void MM_MapEMS (void);
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141 boolean MML_CheckForXMS (void);
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142 void MML_ShutdownXMS (void);
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143 //void MML_UseSpace (unsigned segstart, unsigned seglength);
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144 //void MML_ClearBlock (void);
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146 //==========================================================================
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149 static char *ParmStringsexmm[] = {"noems","noxms",""};
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153 ======================
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157 = Routine from p36 of Extending DOS
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159 =======================
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162 boolean MML_CheckForEMS(void)
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164 boolean emmcfems = false;
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165 word EMSPageFrame = 0;
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166 byte err=0, str[64];
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167 static char emmname[] = "EMMXXXX0"; //fix by andrius4669
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169 mov dx,OFFSET emmname //fix by andrius4669
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171 int EMM_INT // try to open EMMXXXX0 device
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177 int EMM_INT // get device info
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185 int EMM_INT // get status
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191 int EMM_INT // close handle
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197 mov ah,EMS_GETFRAME
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198 int EMS_INT // find the page frame address
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201 mov [EMSPageFrame],bx
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208 #ifdef __BORLANDC__
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212 #ifdef __BORLANDC__
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220 #ifdef __BORLANDC__
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229 // Pageframe switch to determine if there is one!
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234 #if defined(__DEBUG_PM__) || defined(__DEBUG_MM__)
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235 printf("MML_CheckForEMS: EMS error No Pageframe!\nAddress detected to be %04x\n", EMSPageFrame);
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237 }else if(!emmcfems)// if there is an error and page frame is not 0000
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239 strcpy(str,"MML_CheckForEMS: EMS error ");
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240 MM_EMSerr(str, err);
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241 printf("%s\n",str);
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250 ======================
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254 =======================
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257 byte MML_SetupEMS(global_game_variables_t *gvar)
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261 boolean errorflag=false;
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263 unsigned int EMSVer = 0;
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265 unsigned totalEMSpages,freeEMSpages,EMSPageFrame,EMSpagesmapped,EMSHandle;
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266 totalEMSpages = freeEMSpages = EMSPageFrame = EMSpagesmapped = 0;
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270 int EMS_INT // make sure EMS hardware is present
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272 //mov [EMS_status],ah
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279 mov [EMSVer],ax // set EMSVer
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280 cmp al,0x32 // only work on ems 3.2 or greater
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283 mov ah,EMS_GETFRAME
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284 int EMS_INT // find the page frame address
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287 mov [EMSPageFrame],bx
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289 mov ah,EMS_GETPAGES
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290 int EMS_INT // find out how much EMS is there
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293 mov [totalEMSpages],dx
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294 mov [freeEMSpages],bx
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296 jz noEMS // no EMS at all to allocate
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300 cmp bx,[freeEMSpages]
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302 mov bx,[freeEMSpages]
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304 #ifdef __BORLANDC__
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308 #ifdef __BORLANDC__
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312 jle getpages // there is only 1,2,3,or 4 pages
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313 mov bx,4 // we can't use more than 4 pages
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314 #ifdef __BORLANDC__
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318 #ifdef __BORLANDC__
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321 mov [EMSpagesmapped],bx
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322 mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS
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328 #ifdef __BORLANDC__
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332 #ifdef __BORLANDC__
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338 #ifdef __BORLANDC__
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346 if(errorflag==true)
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348 strcpy(str,"MM_SetupEMS: EMS error ");
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349 MM_EMSerr(str, err);
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350 printf("%s\n",str);
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353 gvar->mm.totalEMSpages=totalEMSpages;
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354 gvar->mm.freeEMSpages=freeEMSpages;
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355 gvar->mm.EMSPageFrame=EMSPageFrame;
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356 gvar->mm.EMSpagesmapped=EMSpagesmapped;
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357 gvar->mm.EMSHandle=EMSHandle;
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358 gvar->mm.EMSVer=EMSVer;
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364 ======================
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368 =======================
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371 void MML_ShutdownEMS(global_game_variables_t *gvar)
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373 boolean errorflag=false;
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374 unsigned EMSHandle=gvar->mm.EMSHandle;
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379 mov ah,EMS_FREEPAGES
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385 #ifdef __BORLANDC__
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392 if(errorflag==true)
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393 Quit (gvar, "MML_ShutdownEMS: Error freeing EMS!\n"); //++++ add something
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397 ====================
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401 = Maps the 64k of EMS used by memory manager into the page frame
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402 = for general use. This only needs to be called if you are keeping
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403 = other things in EMS.
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405 ====================
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408 byte MM_MapEMS(global_game_variables_t *gvar)
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411 unsigned EMSHandle;
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413 boolean errorflag=false;
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415 EMSHandle=gvar->mm.EMSHandle;
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417 for (i=0;i<4/*MAPPAGES*/;i++)
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421 mov bx,[i] // logical page
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422 mov al,bl // physical page
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423 mov dx,[EMSHandle] // handle
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428 #ifdef __BORLANDC__
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432 #ifdef __BORLANDC__
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437 #ifdef __BORLANDC__
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444 if(errorflag==true)
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446 strcpy(str,"MM_MapEMS: EMS error ");
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447 MM_EMSerr(str, err);
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448 printf("%s\n",str);
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452 gvar->mmi.EMSmem = (i)*0x4000lu;
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456 byte MM_MapXEMS(global_game_variables_t *gvar)
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458 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
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460 //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
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461 //PhysicalStart = Physical page first logical page is mapped to
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462 //LogicalStart = First logical page to map
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463 //NumPages = Number of pages to map (1 to 4)
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464 //Handle = EMS handle logical pages are allocated to
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466 /*//Create a buffer containing the page information
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467 // FOR x = 0 TO NumPages - 1
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468 // MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
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471 // Regs.ax = 0x5000 //Map the pages in the buffer
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472 // Regs.cx = NumPages //to the pageframe
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473 // Regs.dx = Handle
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474 // Regs.ds = VARSEG(MapInfo$)
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475 // Regs.si = SADD(MapInfo$)
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476 // InterruptX 0x67, Regs, Regs
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477 // EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100 //Store the status code
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483 boolean errorflag=false;
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485 EMSHandle=gvar->mm.EMSHandle;
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487 if(gvar->mm.EMSVer<0x40)
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490 for (i=0;i<MAPPAGES;i++)
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493 mov ah,EMS_MAPXPAGE
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494 mov cx,[i] // logical page
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495 mov al,bl // physical page
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496 mov dx,[EMSHandle] // handle
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501 #ifdef __BORLANDC__
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505 #ifdef __BORLANDC__
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510 #ifdef __BORLANDC__
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517 if(errorflag==true)
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519 //strcpy(str,"MM_MapXEMS: EMS error 0x");
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520 strcpy(str,"MM_MapXEMS: EMS error ");
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521 //itoa(err,str2,16);
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522 MM_EMSerr(str, err);
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523 printf("%s\n",str);
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524 //printf("%s%x\n",str, err);
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525 //printf("FACK! %x\n", err);
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529 gvar->mmi.EMSmem = (i)*0x4000lu;
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534 //==========================================================================
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537 ======================
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541 = Check for XMM driver
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543 =======================
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546 boolean MML_CheckForXMS(void)
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549 boolean errorflag=false;
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553 int 0x2f // query status of installed diver
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557 #ifdef __BORLANDC__
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564 if(errorflag==true) return false;
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571 ======================
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575 = Try to allocate all upper memory block
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577 =======================
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580 void MML_SetupXMS(global_game_variables_t *gvar)
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588 mov [WORD PTR XMSaddr],bx
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589 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
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593 mov ah,XMS_ALLOCUMB
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594 mov dx,0xffff // try for largest block possible
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595 //mov ax,dx // Set available Kbytes.
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596 call [DWORD PTR XMSaddr]
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600 cmp bl,0xb0 // error: smaller UMB is available
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603 mov ah,XMS_ALLOCUMB
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604 call [DWORD PTR XMSaddr] // DX holds largest available UMB
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606 jz done // another error...
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607 #ifdef __BORLANDC__
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611 #ifdef __BORLANDC__
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616 #ifdef __BORLANDC__
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623 // printf("base=%u ", base); printf("size=%u\n", size);
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624 MML_UseSpace (base,size, gvar);
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625 gvar->mmi.XMSmem += size*16;
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626 gvar->mm.UMBbase[gvar->mm.numUMBs] = base;
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627 gvar->mm.numUMBs++;
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628 if(gvar->mm.numUMBs < MAXUMBS)
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634 ======================
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638 ======================
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641 void MML_ShutdownXMS(global_game_variables_t *gvar)
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646 for (i=0;i<gvar->mm.numUMBs;i++)
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648 base = gvar->mm.UMBbase[i];
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652 call [DWORD PTR XMSaddr]
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658 //==========================================================================
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661 ======================
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665 = Marks a range of paragraphs as usable by the memory manager
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666 = This is used to mark space for the near heap, far heap, ems page frame,
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667 = and upper memory blocks
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669 ======================
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673 extra = oldend - (segstart+seglength);
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677 //++++emsver stuff!
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678 if(segm>1)/// || extra>=0x10000lu)
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679 //if(extra>0xfffflu)
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683 //MML_UseSpace (segstart, seglength, gvar);
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685 printf("MML_UseSpace: Segment spans two blocks!\n");
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687 printf("segm=%u ", segm);
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688 printf("ex=%lu ", extra);
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689 printf("old=%u ", oldend);
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690 printf("start+seglen=%lu\n", segstart+seglength);
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691 printf("segsta=%x ", segstart);
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692 printf("len=%lu ", scan->length);
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693 printf("seglen=%lu ", seglength);
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694 printf("segmlen=%lu\n", segmlen);
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696 //++++todo: linked list of segment!
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698 void MML_UseSpace (word segstart, word seglength, global_game_variables_t *gvar)
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700 mmblocktype far *scan,far *last;
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705 scan = last = gvar->mm.mmhead;
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706 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
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709 // search for the block that contains the range of segments
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711 while (scan->start+scan->length < segstart)
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718 // find out how many blocks it spans!
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720 /*for(;seglength>=0x10000;seglength-=0xFFFF)
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722 //printf(" seglen=%lu\n", segmlen);
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727 // take the given range out of the block
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729 oldend = scan->start + scan->length;
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730 extra = oldend - (segstart+seglength);
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732 #ifdef __DEBUG_MM__
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734 printf("========================================\n");
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735 printf("start=%x ", scan->start);
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736 printf("old=%u ", oldend);
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737 printf("start+seglen=%lu\n", segstart+seglength);
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738 printf("segsta=%x ", segstart);
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739 printf("len=%lu ", scan->length);
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740 printf("seglen=%lu ", seglength);
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742 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
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743 printf("========================================\n");
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747 Quit ("MML_UseSpace: Segment spans two blocks!");
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750 if (segstart == scan->start)
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752 last->next = scan->next; // unlink block
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757 scan->length = segstart-scan->start; // shorten block
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762 gvar->mm.mmnew->useptr = NULL;
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764 gvar->mm.mmnew->next = scan->next;
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765 scan->next = gvar->mm.mmnew;
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766 gvar->mm.mmnew->start = segstart+seglength;
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767 gvar->mm.mmnew->length = extra;
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768 gvar->mm.mmnew->attributes = LOCKBIT;
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769 }//else if(segm>0) goto segu;
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773 //==========================================================================
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776 ====================
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780 = We are out of blocks, so free a purgable block
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782 ====================
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785 void MML_ClearBlock (global_game_variables_t *gvar)
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787 mmblocktype far *scan;//,far *last;
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789 scan = gvar->mm.mmhead->next;
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793 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
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795 MM_FreePtr(scan->useptr, gvar);
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801 Quit (gvar, "MM_ClearBlock: No purgable blocks!\n");
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805 //==========================================================================
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808 ===================
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812 = Grabs all space from turbo with malloc/farmalloc
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813 = Allocates bufferseg misc buffer
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815 ===================
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818 void MM_Startup (global_game_variables_t *gvar)
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823 word segstart,seglength;//,endfree;
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825 if(gvar->mm.mmstarted)
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826 MM_Shutdown (gvar);
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828 gvar->mm.mmstarted = true;
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829 gvar->mm.bombonerror = true;
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832 // set up the linked list (everything in the free list;
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834 gvar->mm.mmhead = NULL;
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835 gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);
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836 for (i=0;i<MAXBLOCKS-1;i++)
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837 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);
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838 gvar->mm.mmblocks[i].next = NULL;
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841 // locked block of all memory until we punch out free space
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844 gvar->mm.mmhead = gvar->mm.mmnew; // this will allways be the first node
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845 gvar->mm.mmnew->start = 0;
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846 gvar->mm.mmnew->length = 0xffff;
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847 gvar->mm.mmnew->attributes = LOCKBIT;
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848 gvar->mm.mmnew->next = NULL;
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849 gvar->mm.mmrover = gvar->mm.mmhead;
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853 // get all available near conventional memory segments
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858 length=(word)_memavl();//(word)coreleft();
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859 //start = gvar->mm.nearheap = _fmalloc(length);
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861 start = (void __far *)(gvar->mm.nearheap = _nmalloc(length));
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863 #ifdef __BORLANDC__
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864 start = (void far *)(gvar->mm.nearheap = malloc(length));
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867 length -= 16-(FP_OFF(start)&15);
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868 length -= SAVENEARHEAP;
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869 seglength = length / 16; // now in paragraphs
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870 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
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871 MML_UseSpace (segstart,seglength, gvar);
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872 gvar->mmi.nearheap = length;
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873 //0000printf("near: start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, (dword)seglength, length);
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876 // get all available far conventional memory segments
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881 #ifdef __BORLANDC__
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882 // printf("farcoreleft() %lu\n", farcoreleft());
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883 // printf("(farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
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886 start = gvar->mm.farheap = _fmalloc(length);//start = gvar->mm.farheap = halloc(length, 1);
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888 length -= 16-(FP_OFF(start)&15);
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889 length -= SAVEFARHEAP;
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890 seglength = length / 16; // now in paragraphs
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891 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
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892 MML_UseSpace (segstart,seglength, gvar);
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893 gvar->mmi.farheap = length;
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894 //0000printf("far: start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, (dword)seglength, length);
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896 gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
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898 #if !defined(__16_PM__)// && defined(__WATCOMC__)
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902 // detect EMS and allocate up to 64K at page frame
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904 gvar->mmi.EMSmem = 0;
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905 //goto emsskip; //0000
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906 for(i = 1;i < _argc;i++)
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908 if(US_CheckParm(_argv[i],ParmStringsexmm) == 0)
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909 goto emsskip; // param NOEMS
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911 if(MML_CheckForEMS())
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913 MML_SetupEMS(gvar); // allocate space
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914 //16_PM: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
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915 MML_UseSpace (gvar->mm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);
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916 //if(gvar->pm.emm.EMSVer<0x40)
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917 MM_MapEMS(gvar); // map in used pages
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919 //MM_MapXEMS(gvar); // map in used pages
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923 // detect XMS and get upper memory blocks
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926 gvar->mmi.XMSmem = 0;
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927 goto xmsskip;//0000
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928 for(i = 1;i < _argc;i++)
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930 if(US_CheckParm( _argv[i],ParmStringsexmm) == 0)
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931 goto xmsskip; // param NOXMS
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933 if(MML_CheckForXMS())
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935 MML_SetupXMS(gvar); // allocate as many UMBs as possible
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943 // allocate the misc buffer
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945 gvar->mm.mmrover = gvar->mm.mmhead; // start looking for space after low block
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947 MM_GetPtr (&(gvar->mm.bufferseg),BUFFERSIZE, gvar);
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950 //==========================================================================
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953 ====================
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957 = Frees all conventional, EMS, and XMS allocated
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959 ====================
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962 void MM_Shutdown (global_game_variables_t *gvar)
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964 if(!(gvar->mm.mmstarted))
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967 _ffree(gvar->mm.farheap);// printf(" far freed\n");
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969 _nfree(gvar->mm.nearheap);// printf(" near freed\n");
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971 #ifdef __BORLANDC__
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972 free(gvar->mm.nearheap);// printf(" near freed\n");
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979 if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf(" EMS freed\n"); }
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980 if(MML_CheckForXMS()){ MML_ShutdownXMS(gvar); }//printf(" XMS freed\n"); }
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988 //==========================================================================
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991 ====================
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995 = Allocates an unlocked, unpurgable block
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997 ====================
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1000 void MM_GetPtr (memptr *baseptr,dword size, global_game_variables_t *gvar)
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1002 mmblocktype far *scan,far *lastscan,far *endscan
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1003 ,far *purge,far *next;
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1005 unsigned needed,startseg;
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1007 needed = (size+15)/16; // convert size from bytes to paragraphs
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1009 GETNEWBLOCK; // fill in start and next after a spot is found
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1010 gvar->mm.mmnew->length = needed;
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1011 gvar->mm.mmnew->useptr = baseptr;
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1012 gvar->mm.mmnew->attributes = BASEATTRIBUTES;
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1013 //if(gvar->mm.mmnew->useptr==NULL){
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1014 #ifdef __DEBUG_MM__
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1015 printf("MM_GetPtr\n");
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1016 if(dbg_debugmm>0){
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1018 printf(" baseptr=%Fp ", baseptr); printf("useptr=%Fp\n", gvar->mm.mmnew->useptr);
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1019 printf(" *baseptr=%Fp ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
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1020 printf(" &baseptr=%Fp ", &baseptr); printf("&useptr=%Fp\n", &(gvar->mm.mmnew->useptr));
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1022 printf(" size is %lu\n", size);
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1024 //Quit(gvar, "gvar->mm.mmnew->useptr==NULL"); }
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1027 for (search = 0; search<3; search++)
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1030 // first search: try to allocate right after the rover, then on up
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1031 // second search: search from the head pointer up to the rover
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1032 // third search: compress memory, then scan from start
\r
1033 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)
\r
1039 lastscan = gvar->mm.mmrover;
\r
1040 scan = gvar->mm.mmrover->next;
\r
1044 lastscan = gvar->mm.mmhead;
\r
1045 scan = gvar->mm.mmhead->next;
\r
1046 endscan = gvar->mm.mmrover;
\r
1049 MM_SortMem (gvar);
\r
1050 lastscan = gvar->mm.mmhead;
\r
1051 scan = gvar->mm.mmhead->next;
\r
1056 startseg = lastscan->start + lastscan->length;
\r
1058 while (scan != endscan)
\r
1060 if (scan->start - startseg >= needed)
\r
1063 // got enough space between the end of lastscan and
\r
1064 // the start of scan, so throw out anything in the middle
\r
1065 // and allocate the new block
\r
1067 purge = lastscan->next;
\r
1068 lastscan->next = gvar->mm.mmnew;
\r
1069 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;
\r
1070 gvar->mm.mmnew->next = scan;
\r
1071 while ( purge != scan)
\r
1072 { // free the purgable block
\r
1073 next = purge->next;
\r
1075 purge = next; // purge another if not at scan
\r
1077 gvar->mm.mmrover = gvar->mm.mmnew;
\r
1078 return; // good allocation!
\r
1082 // if this block is purge level zero or locked, skip past it
\r
1084 if ( (scan->attributes & LOCKBIT)
\r
1085 || !(scan->attributes & PURGEBITS) )
\r
1088 startseg = lastscan->start + lastscan->length;
\r
1092 scan=scan->next; // look at next line
\r
1096 if (gvar->mm.bombonerror)
\r
1098 #ifdef __WATCOMC__
\r
1101 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));
\r
1102 Quit(gvar, "for stability reasons the program will shut down! wwww\n");
\r
1105 gvar->mm.mmerror = true;
\r
1108 //==========================================================================
\r
1111 ====================
\r
1115 = Deallocates an unlocked, purgable block
\r
1117 ====================
\r
1120 void MM_FreePtr (memptr *baseptr, global_game_variables_t *gvar)
\r
1122 mmblocktype far *scan,far *last;
\r
1124 last = gvar->mm.mmhead;
\r
1125 scan = last->next;
\r
1127 if (baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
\r
1128 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1130 while(scan->useptr != baseptr && scan)
\r
1133 scan = scan->next;
\r
1137 Quit (gvar, "MM_FreePtr: Block not found!");
\r
1139 last->next = scan->next;
\r
1143 //==========================================================================
\r
1146 =====================
\r
1150 = Sets the purge level for a block (locked blocks cannot be made purgable)
\r
1152 =====================
\r
1155 void MM_SetPurge (memptr *baseptr, int purge, global_game_variables_t *gvar)
\r
1157 mmblocktype far *start;
\r
1159 start = gvar->mm.mmrover;
\r
1163 if (gvar->mm.mmrover->useptr == baseptr)
\r
1166 gvar->mm.mmrover = gvar->mm.mmrover->next;
\r
1168 if (!gvar->mm.mmrover)
\r
1169 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1170 else if (gvar->mm.mmrover == start)
\r
1171 Quit (gvar, "MM_SetPurge: Block not found!");
\r
1175 gvar->mm.mmrover->attributes &= ~PURGEBITS;
\r
1176 gvar->mm.mmrover->attributes |= purge;
\r
1179 //==========================================================================
\r
1182 =====================
\r
1186 = Locks / unlocks the block
\r
1188 =====================
\r
1191 void MM_SetLock (memptr *baseptr, boolean locked, global_game_variables_t *gvar)
\r
1193 mmblocktype far *start;
\r
1195 start = gvar->mm.mmrover;
\r
1199 if (gvar->mm.mmrover->useptr == baseptr)
\r
1202 gvar->mm.mmrover = gvar->mm.mmrover->next;
\r
1204 if (!gvar->mm.mmrover)
\r
1205 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1206 else if (gvar->mm.mmrover == start)
\r
1207 Quit (gvar, "MM_SetLock: Block not found!");
\r
1211 gvar->mm.mmrover->attributes &= ~LOCKBIT;
\r
1212 gvar->mm.mmrover->attributes |= locked*LOCKBIT;
\r
1215 //==========================================================================
\r
1218 =====================
\r
1222 = Throws out all purgable stuff and compresses movable blocks
\r
1224 =====================
\r
1227 void MM_SortMem (global_game_variables_t *gvar)
\r
1229 mmblocktype far *scan,far *last,far *next;
\r
1230 unsigned start,length,source,dest,oldborder;
\r
1231 //++++int playing;
\r
1234 // lock down a currently playing sound
\r
1236 /*++++ playing = SD_SoundPlaying ();
\r
1239 switch (SoundMode)
\r
1242 playing += STARTPCSOUNDS;
\r
1245 playing += STARTADLIBSOUNDS;
\r
1248 MM_SetLock((memptr *)&audiosegs[playing],true);
\r
1253 oldborder = gvar->video.bordercolor;
\r
1254 gvar->video.bordercolor = modexPalOverscan(15);
\r
1259 scan = gvar->mm.mmhead;
\r
1261 last = NULL; // shut up compiler warning
\r
1265 if(scan->attributes & LOCKBIT)
\r
1268 // block is locked, so try to pile later blocks right after it
\r
1270 start = scan->start + scan->length;
\r
1274 if(scan->attributes & PURGEBITS)
\r
1277 // throw out the purgable block
\r
1279 next = scan->next;
\r
1280 FREEBLOCK(scan); //MM_FreeBlock(scan, gvar);
\r
1281 last->next = next;
\r
1288 // push the non purgable block on top of the last moved block
\r
1290 if(scan->start != start)
\r
1292 length = scan->length;
\r
1293 source = scan->start;
\r
1295 while(length > 0xf00)
\r
1297 movedata(source,0,dest,0,0xf00*16);
\r
1302 movedata(source,0,dest,0,length*16);
\r
1304 scan->start = start;
\r
1305 *(unsigned *)scan->useptr = start;
\r
1307 start = scan->start + scan->length;
\r
1312 scan = scan->next; // go to next block
\r
1315 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1320 VL_ColorBorder (oldborder, &gvar->video);
\r
1322 /*++++ if(playing)
\r
1323 MM_SetLock((memptr *)&audiosegs[playing],false);*/
\r
1326 //==========================================================================
\r
1329 =====================
\r
1333 =====================
\r
1336 #ifdef __WATCOMC__
\r
1337 //#define MMSMPANVID
\r
1338 #define MMSMSCANINFO
\r
1341 void MM_ShowMemory (global_game_variables_t *gvar)
\r
1343 mmblocktype far *scan;
\r
1344 unsigned color,temp,x,y ,w,q,width;
\r
1346 byte scratch[160],scratch0[4096],str[16];
\r
1347 mmshowmemoryinfo_t scaninfo[MAXBLOCKS];
\r
1349 if(!gvar->video.page[0].width) gvar->video.page[0].sw = gvar->video.page[0].width = 320; //to prevent division by 0
\r
1350 //-- VL_SetLineWidth(40, gvar);
\r
1351 //temp = gvar->video.ofs.bufferofs;
\r
1352 //gvar->video.ofs.bufferofs = gvar->video.ofs.displayofs;
\r
1353 temp = BDOFSCONV gvar->video.BOFS;
\r
1354 gvar->video.BOFS = gvar->video.DOFS;
\r
1355 scan = gvar->mm.mmhead;
\r
1359 width = gvar->video.page[0].width; q = 0;
\r
1361 CA_OpenDebug (gvar);
\r
1364 scaninfo[q].scan = scan;
\r
1365 strcpy(scratch, AARESET);
\r
1366 if(scan->attributes & PURGEBITS)
\r
1368 color = 6; // dark purple = purgable
\r
1369 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
\r
1371 color = 2; // medium blue = non purgable
\r
1372 strcpy(scratch0, AABLUE); // medium blue = non purgable
\r
1374 if(scan->attributes & LOCKBIT)
\r
1376 color = 1; // red = locked
\r
1377 strcpy(scratch0, AARED); // red = locked
\r
1379 if (scan->start<=end)
\r
1381 printf("\nend==%d\n\n", end);
\r
1382 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
\r
1383 strcat(scratch, "End's Size: ");
\r
1384 ultoa (end,str,10);
\r
1385 strcat (scratch,str);
\r
1386 strcat(scratch, "\nscan->start's Size: ");
\r
1387 ultoa (scan->start,str,10);
\r
1388 strcat (scratch,str);
\r
1389 write(gvar->handle.debughandle,scratch,strlen(scratch));
\r
1390 Quit (gvar, "MM_ShowMemory: Memory block order currupted!");
\r
1392 end = scan->length-1;
\r
1393 y = scan->start/width;
\r
1394 x = scan->start%width;
\r
1395 scaninfo[q].x = x;
\r
1396 scaninfo[q].y = y;
\r
1397 VW_Hlin(x,x+end,y,color,gvar);
\r
1398 VL_Plot(x,y,5,gvar);
\r
1399 //++==++==optional strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
\r
1400 for(w=(scan->start)/80;w<=end/80;w++)
\r
1402 //printf("+ %u %lu\n", w, scan->length);
\r
1403 strcat(scratch0, "+");
\r
1406 if (scan->next && scan->next->start > end+1)
\r
1408 VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,3,gvar); // black = free//now green
\r
1409 strcat(scratch0, AARESET);
\r
1410 //++==++==optional strcat(scratch0, "\n");
\r
1411 strcat(scratch0,AAGREEN);
\r
1412 for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
\r
1414 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
\r
1415 strcat(scratch0,"0");
\r
1417 //printf("==================\n");
\r
1418 //printf("w=%u start=%04x next=%04x end=%lu\n", w/80, scan->start, (scan->next->start), end+1);
\r
1419 //printf("==================\n");
\r
1420 strcat(scratch0, "\n");
\r
1423 else {//if(scan->next->start <= scan->start){
\r
1424 scan->next->start=scan->start+0x1000;
\r
1425 strcat(scratch0, AARESET);
\r
1426 strcat(scratch0, "\n");
\r
1427 strcat(scratch0,AAGREEN);
\r
1428 for(w=(end+1);w<=(0x1000/80);w++)
\r
1430 //printf("0 %x %x %u\n", scan->start, w);
\r
1431 strcat(scratch0,"0");
\r
1433 printf("================\n");
\r
1434 printf("w=%x start=%x next=%x end=%u\n", w, scan->start, (scan->next->start), end+1);
\r
1435 printf("================\n");
\r
1439 strcat(scratch0, AARESET);
\r
1440 //strcat(scratch0,"\n");
\r
1441 strcat(scratch,"Seg:");
\r
1442 ultoa (scan->start,str,16);
\r
1443 strcat (scratch,str);
\r
1444 // strcat(scratch, AABLACK); strcat(scratch,"\t"); strcat(scratch, AARESET);
\r
1445 strcat (scratch,"\tSize:");
\r
1446 ultoa ((unsigned)scan->length,str,10);
\r
1447 strcat (scratch,str);
\r
1448 // strcat(scratch, AABLACK); strcat(scratch,"\t"); strcat(scratch, AARESET);
\r
1449 strcat (scratch,"\tOwner:0x");
\r
1450 owner = (unsigned)scan->useptr;
\r
1451 ultoa (owner,str,16);
\r
1452 strcat (scratch,str);
\r
1453 strcat (scratch,"\n");
\r
1454 write(gvar->handle.debughandle,scratch,strlen(scratch));
\r
1455 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
\r
1456 //fprintf(stdout, "%s", scratch);
\r
1458 scan = scan->next;
\r
1460 //if(color!=6) IN_Ack(gvar);
\r
1463 CA_CloseDebug (gvar);
\r
1467 int dx,dy,odx,ody;
\r
1468 odx = gvar->video.page[0].dx;
\r
1469 ody = gvar->video.page[0].dy;
\r
1471 while(!gvar->in.inst->Keyboard[sc_Escape])
\r
1473 if(gvar->in.inst->Keyboard[sc_UpArrow])
\r
1478 else if(gvar->in.inst->Keyboard[sc_DownArrow])
\r
1480 if(dy<gvar->video.page[0].height-gvar->video.page[0].sh)
\r
1483 if(gvar->in.inst->Keyboard[sc_LeftArrow])
\r
1488 else if(gvar->in.inst->Keyboard[sc_RightArrow])
\r
1490 if(dx<gvar->video.page[0].width-gvar->video.page[0].sw)
\r
1494 modexPanPage(&gvar->video.page[0], dx, dy);
\r
1495 VL_ShowPage(&gvar->video.page[0], 1, 1);
\r
1498 gvar->video.page[0].dx = odx;
\r
1499 gvar->video.page[0].dy = ody;
\r
1502 #ifdef MMSMSCANINFO
\r
1505 unsigned maxq = q;
\r
1507 ScanCode scancode;
\r
1509 word qq, ccolor = 3;
\r
1511 // VL_ClearVideo (8);
\r
1512 for (qq = 0,done = false;!done;)
\r
1514 if(scaninfo[qq].scan->attributes & PURGEBITS)
\r
1516 ccolor = 6; // dark purple = purgable
\r
1517 strcpy(scratch1, AAMAGENTA); // dark purple = purgable
\r
1518 //printf("%s", AAMAGENTA);
\r
1520 ccolor = 2; // medium blue = non purgable
\r
1521 strcpy(scratch1, AABLUE); // medium blue = non purgable
\r
1522 //printf("%s", AABLUE);
\r
1524 if(scaninfo[qq].scan->attributes & LOCKBIT)
\r
1526 ccolor = 1; // red = locked
\r
1527 strcpy(scratch1, AARED); // red = locked
\r
1528 //printf("%s", AARED);
\r
1530 end = scaninfo[qq].scan->length-1;
\r
1531 /*typedef struct mmblockstruct{
\r
1532 word start,length;
\r
1533 unsigned attributes;
\r
1534 memptr *useptr; // pointer to the segment start
\r
1535 struct mmblockstruct far *next;
\r
1537 //modexprint(page, x, y, t, tlsw, color, bgcolor, vidsw, const byte *str);
\r
1538 #define MMSMPRINTMEMINFO modexprint(&(gvar->video.page[0]), xpos, ypos, 1, 0, ccolor, 8, gvar->video.VL_Started, global_temp_status_text); ypos+=8;
\r
1539 if(!gvar->video.VL_Started) clrscr(); else
\r
1541 VL_ShowPage(&gvar->video.page[0], 1, 0);
\r
1542 modexClearRegion(&gvar->video.page[0], 0, 0, gvar->video.page[0].width, gvar->video.page[0].height, 8);
\r
1544 sprintf(global_temp_status_text, "block #%04u", qq); MMSMPRINTMEMINFO
\r
1545 // sprintf(global_temp_status_text, "%Fp", scaninfo[qq].scan->useptr); MMSMPRINTMEMINFO
\r
1546 sprintf(global_temp_status_text, "%04x", (unsigned)scaninfo[qq].scan->useptr); MMSMPRINTMEMINFO
\r
1547 sprintf(global_temp_status_text, "size: %05u", (unsigned)scaninfo[qq].scan->length); MMSMPRINTMEMINFO
\r
1548 if (scaninfo[qq].scan->next && scaninfo[qq].scan->next->start > end+1)
\r
1550 sprintf(global_temp_status_text, "free: %05u", (unsigned)(scaninfo[qq].scan->next->start-scaninfo[qq].scan->start)); MMSMPRINTMEMINFO
\r
1552 if(gvar->video.VL_Started)
\r
1554 y = ypos;//scaninfo[qq].scan->start/width;
\r
1555 x = xpos;//scaninfo[qq].scan->start%width;
\r
1556 VW_Hlin(x,x+end,y,ccolor,gvar);
\r
1557 VL_Plot(x,y,5,gvar);
\r
1561 printf("%s", scratch1);
\r
1562 printf("%s", AAGREY); printf("_");
\r
1563 for(w=(scaninfo[qq].scan->start)/80;w<=end/80;w++)
\r
1565 //strcat(scratch1, "+");
\r
1571 if (scaninfo[qq].scan->next && scaninfo[qq].scan->next->start > end+1) if(!gvar->video.VL_Started)
\r
1573 //strcat(scratch1, AARESET);
\r
1574 printf("%s", AARESET);
\r
1575 //strcat(scratch1,AAGREEN);
\r
1576 printf("%s", AAGREEN);
\r
1577 for(w=(end+1)/80;w<=((scaninfo[qq].scan->next->start-scaninfo[qq].scan->start)/80);w++)
\r
1579 //strcat(scratch1,"0");
\r
1582 }else VW_Hlin(x+end+1,x+(scaninfo[qq].scan->next->start-scaninfo[qq].scan->start),y,3,gvar); // black = free//now green
\r
1585 if(gvar->video.VL_Started)
\r
1587 //if (scan->next && scan->next->start > end+1) free
\r
1589 ypos = 16;//(gvar->video.page[0].sh-(32));//8*4
\r
1593 //printf("%s\n", scratch1);
\r
1594 printf("%s", AARESET);
\r
1597 while (!(scancode = gvar->in.inst->LastScan)){}
\r
1599 IN_ClearKey(scancode);
\r
1602 case sc_LeftArrow:
\r
1606 case sc_RightArrow:
\r
1618 if(gvar->video.VL_Started) IN_Ack(gvar);
\r
1620 gvar->video.BOFS = (byte __far *)temp;
\r
1623 //==========================================================================
\r
1626 =====================
\r
1630 =====================
\r
1633 void MM_DumpData (global_game_variables_t *gvar)
\r
1635 mmblocktype far *scan,far *best;
\r
1636 long lowest,oldlowest;
\r
1641 #ifdef __WATCOMC__
\r
1642 _nfree(gvar->mm.nearheap);
\r
1644 #ifdef __BORLANDC__
\r
1645 free(gvar->mm.nearheap);
\r
1647 #ifdef __BORLANDC__
\r
1648 dumpfile = fopen ("mmdump.16b","w");
\r
1650 #ifdef __WATCOMC__
\r
1651 dumpfile = fopen ("mmdump.16w","w");
\r
1654 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
\r
1661 oldlowest = lowest;
\r
1664 scan = gvar->mm.mmhead;
\r
1667 owner = (unsigned)scan->useptr;
\r
1669 if (owner && owner<lowest && owner > oldlowest)
\r
1675 scan = scan->next;
\r
1678 if (lowest != 0xffff)
\r
1680 if (best->attributes & PURGEBITS)
\r
1684 if (best->attributes & LOCKBIT)
\r
1688 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
\r
1689 ,(unsigned)lowest,lock,purge,best->length);
\r
1692 } while (lowest != 0xffff);
\r
1695 printf("MMDUMP.16 created.\n");
\r
1698 //==========================================================================
\r
1702 ======================
\r
1706 = Returns the total free space without purging
\r
1708 ======================
\r
1711 dword MM_UnusedMemory (global_game_variables_t *gvar)
\r
1714 mmblocktype far *scan;
\r
1717 scan = gvar->mm.mmhead;
\r
1721 free += scan->next->start - (scan->start + scan->length);
\r
1722 scan = scan->next;
\r
1728 //==========================================================================
\r
1732 ======================
\r
1736 = Returns the total free space with purging
\r
1738 ======================
\r
1741 dword MM_TotalFree (global_game_variables_t *gvar)
\r
1744 mmblocktype far *scan;
\r
1747 scan = gvar->mm.mmhead;
\r
1751 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
\r
1752 free += scan->length;
\r
1753 free += scan->next->start - (scan->start + scan->length);
\r
1754 scan = scan->next;
\r
1760 //==========================================================================
\r
1763 =====================
\r
1767 =====================
\r
1770 void MM_Report_ (global_game_variables_t *gvar)
\r
1772 printf("========================================\n");
\r
1773 printf(" MM_Report_\n");
\r
1774 printf("========================================\n");
\r
1775 if(MML_CheckForEMS())
\r
1777 printf(" %cLIMEMS %u\n", 0xC9, gvar->pm.emm.EMSPresent);
\r
1778 printf(" %c%cEMM v%x.%x available\n", 0xC7, 0xC4, gvar->pm.emm.EMSVer>>4,gvar->pm.emm.EMSVer&0x0F);
\r
1779 printf(" %c%ctotalEMSpages: %u ", 0xC7, 0xC4, gvar->pm.emm.totalEMSpages); printf("freeEMSpages: %u\n", gvar->pm.emm.freeEMSpages);
\r
1780 printf(" %c%cEMSPageFrame: %04x\n", 0xC7, 0xC4, gvar->pm.emm.EMSPageFrame);
\r
1781 printf(" %c%cEMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.EMSmem);
\r
1783 if(MML_CheckForXMS())
\r
1785 printf(" %cXMS %u\n", 0xC9, gvar->pm.xmm.XMSPresent);
\r
1786 printf(" %c%cXMS v%x.%x available\n", 0xC7, 0xC4, XMSVer>>8,XMSVer&0x0F);
\r
1787 printf(" %c%cXMSDriver: %Fp\n", 0xC7, 0xC4, XMSDriver);
\r
1788 printf(" %c%cXMSHandle: %04x\n", 0xC7, 0xC4, gvar->pm.xmm.XMSHandle);
\r
1789 printf(" %c%cXMSmem: %lu\n", 0xD3, 0xC4, gvar->mmi.XMSmem);
\r
1791 printf(" %cConv. %u\n", 0xC9, gvar->pm.mm.MainPresent); DebugMemory_(gvar, 0);
\r
1792 //printf("mainmem: %lu\n", gvar->mmi.mainmem);
\r
1793 //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
1794 //printf(" UnusedMemory: %lu\n", MM_UnusedMemory(gvar));
\r
1795 printf("nearheap: %lu ", gvar->mmi.nearheap); printf("farheap: %lu\n", gvar->mmi.farheap);
\r
1798 //==========================================================================
\r
1801 =====================
\r
1805 =====================
\r
1808 void MM_EMSerr(byte *stri, byte err)
\r
1810 //Returns a text string describing the error code in EMS.Error.
\r
1814 strcat(stri, "successful");
\r
1817 strcat(stri, "internal error");
\r
1820 strcat(stri, "hardware malfunction");
\r
1823 strcat(stri, "busy .. retry later");
\r
1826 strcat(stri, "invalid handle");
\r
1829 strcat(stri, "undefined function requested by application");
\r
1832 strcat(stri, "no more handles available");
\r
1835 strcat(stri, "error in save or restore of mapping context");
\r
1838 strcat(stri, "insufficient memory pages in system");
\r
1841 strcat(stri, "insufficient memory pages available");
\r
1844 strcat(stri, "zero pages requested");
\r
1847 strcat(stri, "invalid logical page number encountered");
\r
1850 strcat(stri, "invalid physical page number encountered");
\r
1853 strcat(stri, "page-mapping hardware state save area is full");
\r
1856 strcat(stri, "save of mapping context failed");
\r
1859 strcat(stri, "restore of mapping context failed");
\r
1862 strcat(stri, "undefined subfunction");
\r
1865 strcat(stri, "undefined attribute type");
\r
1868 strcat(stri, "feature not supported");
\r
1871 strcat(stri, "successful, but a portion of the source region has been overwritten");
\r
1874 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
\r
1877 strcat(stri, "conventional and expanded memory regions overlap");
\r
1880 strcat(stri, "offset within logical page exceeds size of logical page");
\r
1883 strcat(stri, "region length exceeds 1 MB");
\r
1886 strcat(stri, "source and destination EMS regions have same handle and overlap");
\r
1889 strcat(stri, "memory source or destination type undefined");
\r
1892 strcat(stri, "specified alternate map register or DMA register set not supported");
\r
1895 strcat(stri, "all alternate map register or DMA register sets currently allocated");
\r
1898 strcat(stri, "alternate map register or DMA register sets not supported");
\r
1901 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
\r
1904 strcat(stri, "dedicated DMA channels not supported");
\r
1907 strcat(stri, "specified dedicated DMA channel not supported");
\r
1910 strcat(stri, "no such handle name");
\r
1913 strcat(stri, "a handle found had no name, or duplicate handle name");
\r
1916 strcat(stri, "attempted to wrap around 1M conventional address space");
\r
1919 strcat(stri, "source array corrupted");
\r
1922 strcat(stri, "operating system denied access");
\r
1925 strcat(stri, "undefined error");
\r
1929 //==========================================================================
\r
1932 =====================
\r
1936 =====================
\r
1939 void MM_BombOnError (boolean bomb, global_game_variables_t *gvar)
\r
1941 gvar->mm.bombonerror = bomb;
\r
1945 void MM_GetNewBlock(global_game_variables_t *gvar)
\r
1947 if(!gvar->mm.mmfree)
\r
1948 MML_ClearBlock(gvar);
\r
1949 gvar->mm.mmnew=gvar->mm.mmfree;
\r
1950 gvar->mm.mmfree=gvar->mm.mmfree->next;
\r
1951 if(!(gvar->mm.mmnew=gvar->mm.mmfree))
\r
1953 printf("MM_GETNEWBLOCK: No free blocks!\n");
\r
1956 gvar->mm.mmfree=gvar->mm.mmfree->next;
\r
1959 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
\r
1962 x->next=gvar->mm.mmfree;
\r
1963 gvar->mm.mmfree=x;
\r
1967 void xms_call(byte v, global_game_variables_t *gvar)
\r
1969 dword XMSDriver = gvar->pm.xmm.XMSDriver;
\r
1972 call [DWORD PTR XMSDriver]
\r
1976 /*void MM_seguin(void)
\r
1986 void MM_segude(void)
\r
1994 pull data from far and put it into ds var
\r
2001 bp bottem of stack
\r