1 /* Catacomb Apocalypse Source Code
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2 * Copyright (C) 1993-2014 Flat Rock Software
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; either version 2 of the License, or
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7 * (at your option) any later version.
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9 * This program is distributed in the hope that it will be useful,
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 * GNU General Public License for more details.
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14 * You should have received a copy of the GNU General Public License along
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15 * with this program; if not, write to the Free Software Foundation, Inc.,
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16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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22 =============================================================================
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24 ID software memory manager
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25 --------------------------
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27 Primary coder: John Carmack
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31 Quit (char *error) function
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36 MM_SizePtr to change the size of a given pointer
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38 Multiple purge levels utilized
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40 EMS / XMS unmanaged routines
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42 =============================================================================
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46 Open Watcom port by sparky4
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49 #include "src/lib/16_mm.h"
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50 #include "src/lib/16_ca.h"
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57 =============================================================================
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61 =============================================================================
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64 void (* beforesort) (void);
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65 void (* aftersort) (void);
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66 void (* XMSaddr) (void); // far pointer to XMS driver
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69 =============================================================================
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73 =============================================================================
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77 ======================
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81 = Routine from p36 of Extending DOS
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83 =======================
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86 boolean MML_CheckForEMS(void)
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89 static char emmname[] = "EMMXXXX0"; //fix by andrius4669
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91 mov dx,OFFSET emmname //fix by andrius4669
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93 int 0x21 // try to open EMMXXXX0 device
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99 int 0x21 // get device info
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107 int 0x21 // get status
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113 int 0x21 // close handle
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120 #ifdef __BORLANDC__
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124 #ifdef __BORLANDC__
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131 #ifdef __BORLANDC__
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143 ======================
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147 =======================
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150 byte MML_SetupEMS(global_game_variables_t *gvar)
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154 boolean errorflag=false;
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156 unsigned int EMSVer = 0;
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158 unsigned totalEMSpages,freeEMSpages,EMSPageFrame,EMSpagesmapped,EMSHandle;
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159 totalEMSpages = freeEMSpages = EMSPageFrame = EMSpagesmapped = 0;
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163 int EMS_INT // make sure EMS hardware is present
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165 //mov [EMS_status],ah
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172 mov [EMSVer],ax // set EMSVer
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173 cmp al,0x32 // only work on ems 3.2 or greater
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176 mov ah,EMS_GETFRAME
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177 int EMS_INT // find the page frame address
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180 mov [EMSPageFrame],bx
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182 mov ah,EMS_GETPAGES
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183 int EMS_INT // find out how much EMS is there
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186 mov [totalEMSpages],dx
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187 mov [freeEMSpages],bx
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189 jz noEMS // no EMS at all to allocate
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193 cmp bx,[freeEMSpages]
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195 mov bx,[freeEMSpages]
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197 #ifdef __BORLANDC__
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201 #ifdef __BORLANDC__
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205 jle getpages // there is only 1,2,3,or 4 pages
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206 mov bx,4 // we can't use more than 4 pages
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207 #ifdef __BORLANDC__
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211 #ifdef __BORLANDC__
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214 mov [EMSpagesmapped],bx
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215 mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS
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221 #ifdef __BORLANDC__
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225 #ifdef __BORLANDC__
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231 #ifdef __BORLANDC__
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239 if(errorflag==true)
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241 strcpy(str,"MM_SetupEMS: EMS error ");
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242 MM_EMSerr(str, err);
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243 printf("%s\n",str);
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246 gvar->pm.emm.totalEMSpages=totalEMSpages;
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247 gvar->pm.emm.freeEMSpages=freeEMSpages;
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248 gvar->pm.emm.EMSPageFrame=EMSPageFrame;
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249 gvar->pm.emm.EMSpagesmapped=EMSpagesmapped;
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250 gvar->pm.emm.EMSHandle=EMSHandle;
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251 gvar->pm.emm.EMSVer=EMSVer;
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257 ======================
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261 =======================
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264 void MML_ShutdownEMS(global_game_variables_t *gvar)
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266 boolean errorflag=false;
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267 unsigned EMSHandle=gvar->pm.emm.EMSHandle;
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272 mov ah,EMS_FREEPAGES
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278 #ifdef __BORLANDC__
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285 if(errorflag==true)
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286 Quit("MML_ShutdownEMS: Error freeing EMS!\n"); //++++ add something
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290 ====================
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294 = Maps the 64k of EMS used by memory manager into the page frame
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295 = for general use. This only needs to be called if you are keeping
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296 = other things in EMS.
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298 ====================
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301 byte MM_MapEMS(global_game_variables_t *gvar)
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304 unsigned EMSHandle;
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306 boolean errorflag=false;
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308 EMSHandle=gvar->pm.emm.EMSHandle;
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310 for (i=0;i<4/*MAPPAGES*/;i++)
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314 mov bx,[i] // logical page
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315 mov al,bl // physical page
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316 mov dx,[EMSHandle] // handle
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321 #ifdef __BORLANDC__
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325 #ifdef __BORLANDC__
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330 #ifdef __BORLANDC__
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337 if(errorflag==true)
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339 strcpy(str,"MM_MapEMS: EMS error ");
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340 MM_EMSerr(str, err);
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341 printf("%s\n",str);
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345 gvar->mmi.EMSmem = (i)*0x4000lu;
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346 //printf(" gvar->mmi.EMSmem=%lu\n", gvar->mmi.EMSmem);
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350 byte MM_MapXEMS(global_game_variables_t *gvar)
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352 //SUB EMS.MapXPages (PhysicalStart, LogicalStart, NumPages, Handle)
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354 //Maps up to 4 logical EMS pages to physical pages in the page frame, where:
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355 //PhysicalStart = Physical page first logical page is mapped to
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356 //LogicalStart = First logical page to map
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357 //NumPages = Number of pages to map (1 to 4)
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358 //Handle = EMS handle logical pages are allocated to
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360 /*//Create a buffer containing the page information
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361 // FOR x = 0 TO NumPages - 1
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362 // MapInfo$ = MapInfo$ + MKI$(LogicalStart + x) + MKI$(PhysicalStart + x)
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365 // Regs.ax = 0x5000 //Map the pages in the buffer
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366 // Regs.cx = NumPages //to the pageframe
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367 // Regs.dx = Handle
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368 // Regs.ds = VARSEG(MapInfo$)
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369 // Regs.si = SADD(MapInfo$)
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370 // InterruptX 0x67, Regs, Regs
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371 // EMS.Error = (Regs.ax AND 0xFF00&) \ 0x100 //Store the status code
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377 boolean errorflag=false;
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379 EMSHandle=gvar->pm.emm.EMSHandle;
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381 if(gvar->pm.emm.EMSVer<0x40)
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384 for (i=0;i<MAPPAGES;i++)
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387 mov ah,EMS_MAPXPAGE
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388 mov cx,[i] // logical page
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389 mov al,bl // physical page
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390 mov dx,[EMSHandle] // handle
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395 #ifdef __BORLANDC__
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399 #ifdef __BORLANDC__
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404 #ifdef __BORLANDC__
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411 if(errorflag==true)
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413 //strcpy(str,"MM_MapXEMS: EMS error 0x");
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414 strcpy(str,"MM_MapXEMS: EMS error ");
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415 //itoa(err,str2,16);
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416 MM_EMSerr(str, err);
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417 printf("%s\n",str);
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418 //printf("%s%x\n",str, err);
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419 //printf("FACK! %x\n", err);
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423 gvar->mmi.EMSmem = (i)*0x4000lu;
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427 //==========================================================================
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430 ======================
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434 = Check for XMM driver
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436 =======================
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439 boolean MML_CheckForXMS(global_game_variables_t *gvar)
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441 boolean errorflag=false;
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442 gvar->mm.numUMBs = 0;
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446 int 0x2f // query status of installed diver
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450 #ifdef __BORLANDC__
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457 if(errorflag==true) return false;
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463 ======================
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467 = Try to allocate all upper memory block
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469 =======================
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472 void MML_SetupXMS(global_game_variables_t *gvar)
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480 mov [WORD PTR XMSaddr],bx
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481 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
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485 mov ah,XMS_ALLOCUMB
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486 mov dx,0xffff // try for largest block possible
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487 //mov ax,dx // Set available Kbytes.
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488 call [DWORD PTR XMSaddr]
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492 cmp bl,0xb0 // error: smaller UMB is available
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495 mov ah,XMS_ALLOCUMB
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496 call [DWORD PTR XMSaddr] // DX holds largest available UMB
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498 jz done // another error...
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499 #ifdef __BORLANDC__
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503 #ifdef __BORLANDC__
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508 #ifdef __BORLANDC__
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515 // printf("base=%u ", base); printf("size=%u\n", size);
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516 MML_UseSpace(base,size, gvar);
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517 gvar->mmi.XMSmem += size*16;
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518 gvar->mm.UMBbase[gvar->mm.numUMBs] = base;
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519 gvar->mm.numUMBs++;
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520 if(gvar->mm.numUMBs < MAXUMBS)
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526 ======================
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530 ======================
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533 void MML_ShutdownXMS(global_game_variables_t *gvar)
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538 for (i=0;i<gvar->mm.numUMBs;i++)
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540 base = gvar->mm.UMBbase[i];
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544 call [DWORD PTR XMSaddr]
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549 //==========================================================================
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552 ======================
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556 = Marks a range of paragraphs as usable by the memory manager
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557 = This is used to mark space for the near heap, far heap, ems page frame,
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558 = and upper memory blocks
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560 ======================
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563 /*void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
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565 //huge mmblocktype huge *scan,huge *last;
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571 scan = last = gvar->mm.mmhead;
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572 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
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575 // search for the block that contains the range of segments
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577 while(scan->start+scan->length < segstart)
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584 // take the given range out of the block
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586 oldend = scan->start + scan->length;
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587 extra = oldend - (segstart+seglength);
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591 //++++emsver stuff!
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592 if(segm>1)/// || extra>=0x10000lu)
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593 //if(extra>0xfffflu)
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597 //MML_UseSpace(segstart, seglength, gvar);
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599 printf("MML_UseSpace: Segment spans two blocks!\n");
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601 printf("segm=%u ", segm);
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602 printf("ex=%lu ", extra);
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603 printf("old=%u ", oldend);
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604 printf("start+seglen=%lu\n", segstart+seglength);
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605 printf("segsta=%x ", segstart);
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606 printf("len=%lu ", scan->length);
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607 printf("seglen=%lu ", seglength);
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608 printf("segmlen=%lu\n", segmlen);
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610 //++++todo: linked list of segment!
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611 if(segstart == scan->start)
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613 last->next = scan->next; // unlink block
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618 scan->length = segstart-scan->start; // shorten block
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623 gvar->mm.mmnew->useptr = NULL;
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625 gvar->mm.mmnew->next = scan->next;
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626 scan->next = gvar->mm.mmnew;
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627 gvar->mm.mmnew->start = segstart+seglength;
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628 gvar->mm.mmnew->length = extra;
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629 gvar->mm.mmnew->attributes = LOCKBIT;
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630 }//else if(segm>0) goto segu;
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633 void MML_UseSpace(word segstart, dword seglength, global_game_variables_t *gvar)
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635 mmblocktype far *scan,far *last;
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640 scan = last = gvar->mm.mmhead;
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641 gvar->mm.mmrover = gvar->mm.mmhead; // reset rover to start of memory
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644 // search for the block that contains the range of segments
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646 while (scan->start+scan->length < segstart)
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653 // find out how many blocks it spans!
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655 /*for(;seglength>=0x10000;seglength-=0xFFFF)
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657 //printf(" seglen=%lu\n", segmlen);
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662 // take the given range out of the block
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664 oldend = scan->start + scan->length;
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665 extra = oldend - (segstart+((unsigned)seglength));
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668 printf("========================================\n");
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669 printf("start=%x ", scan->start);
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670 printf("old=%u ", oldend);
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671 printf("start+seglen=%lu\n", segstart+seglength);
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672 printf("segsta=%x ", segstart);
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673 printf("len=%lu ", scan->length);
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674 printf("seglen=%lu ", seglength);
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676 printf("MML_UseSpace: Segment spans two blocks! %d\n", extra);
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677 printf("========================================\n");
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681 if (segstart == scan->start)
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683 last->next = scan->next; // unlink block
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688 scan->length = segstart-scan->start; // shorten block
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693 gvar->mm.mmnew->useptr = NULL;
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695 gvar->mm.mmnew->next = scan->next;
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696 scan->next = gvar->mm.mmnew;
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697 gvar->mm.mmnew->start = segstart+seglength;
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698 gvar->mm.mmnew->length = extra;
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699 gvar->mm.mmnew->attributes = LOCKBIT;
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704 //==========================================================================
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707 ====================
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711 = We are out of blocks, so free a purgable block
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713 ====================
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716 void MML_ClearBlock(global_game_variables_t *gvar)
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718 //huge mmblocktype huge *scan,huge *last;
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719 mmblocktype far *scan,far *last;
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721 scan = gvar->mm.mmhead->next;
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725 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
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727 MM_FreePtr(scan->useptr, gvar);
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733 printf("MM_ClearBlock: No purgable blocks!\n");
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737 //==========================================================================
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740 ===================
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744 = Grabs all space from turbo with malloc/farmalloc
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745 = Allocates bufferseg misc buffer
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747 ===================
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750 void MM_Startup(global_game_variables_t *gvar)
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753 //dword length,seglength;
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755 //huge void huge *start;
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757 word segstart,seglength,endfree;
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758 //memptr *peeonself;
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760 if(gvar->mm.mmstarted)
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764 gvar->mm.mmstarted = true;
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765 gvar->mm.bombonerror = true;
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767 // set up the linked list (everything in the free list;
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769 gvar->mm.mmhead = NULL;
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770 gvar->mm.mmfree = &(gvar->mm.mmblocks[0]);
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771 for(i=0;i<MAXBLOCKS-1;i++)
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773 gvar->mm.mmblocks[i].next = &(gvar->mm.mmblocks[i+1]);
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775 gvar->mm.mmblocks[i].next = NULL;
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778 // locked block of all memory until we punch out free space
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781 gvar->mm.mmhead = gvar->mm.mmnew; // this will allways be the first node
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782 gvar->mm.mmnew->start = 0;
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783 gvar->mm.mmnew->length = 0xffff;
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784 gvar->mm.mmnew->attributes = LOCKBIT;
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785 gvar->mm.mmnew->next = NULL;
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786 //gvar->mm.mmnew->useptr = peeonself;
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787 gvar->mm.mmrover = gvar->mm.mmhead;
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789 //printf(" %x\n", peeonself);
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790 //printf(" %x\n", *peeonself);
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792 // get all available near conventional memory segments
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796 length=(dword)_memavl();//(dword)GetFreeSize();
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797 //huge start = (void huge *)(gvar->mm.nearheap = _nmalloc(length));
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798 start = (void far *)(gvar->mm.nearheap = _nmalloc(length));
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800 #ifdef __BORLANDC__
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802 //huge start = (void huge *)(gvar->mm.nearheap = malloc(length));
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803 start = (void far *)(gvar->mm.nearheap = malloc(length));
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804 printf("Borland C unique function\n");
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805 printf(" coreleft() %lu\n", coreleft());
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807 length -= 16-(FP_OFF(start)&15);
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808 length -= SAVENEARHEAP;
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809 seglength = length / 16; // now in paragraphs
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810 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
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811 MML_UseSpace(segstart,seglength, gvar);
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812 gvar->mmi.nearheap = length;
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813 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
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816 // get all available far conventional memory segments
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818 //printf("_FARCORELEFT %lu\n", _FCORELEFT);
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822 #ifdef __BORLANDC__
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823 printf(" farcoreleft() %lu\n", farcoreleft());
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824 printf(" (farcoreleft()+32)-_FCORELEFT %d\n", (sword)((farcoreleft()+32)-_FCORELEFT));
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826 length=_FCORELEFT;//_fcoreleft();//(dword)GetFarFreeSize();//0xffffUL*4UL;
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827 start = gvar->mm.farheap = _fmalloc(length);
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828 //start = gvar->mm.farheap = halloc(length, 1);
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829 length -= 16-(FP_OFF(start)&15);
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830 length -= SAVEFARHEAP;
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831 seglength = length / 16; // now in paragraphs
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832 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
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833 MML_UseSpace(segstart,seglength, gvar);
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834 gvar->mmi.farheap = length;
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835 gvar->mmi.mainmem = gvar->mmi.nearheap + gvar->mmi.farheap;
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836 //printf("start=%Fp segstart=%x seglen=%lu len=%lu\n", start, segstart, seglength, length);
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838 #ifdef __DEBUG_PM__
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839 goto xmsskip; //INFO: 16_PM dose this job better
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843 // detect EMS and allocate up to 64K at page frame
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845 gvar->mmi.EMSmem = 0;
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846 //goto emsskip; //0000
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847 if(MML_CheckForEMS())
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849 MML_SetupEMS(gvar); // allocate space
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850 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
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851 MML_UseSpace(gvar->pm.emm.EMSPageFrame,(MAPPAGES)*0x4000lu, gvar);
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852 //if(gvar->pm.emm.EMSVer<0x40)
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853 MM_MapEMS(gvar); // map in used pages
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855 //MM_MapXEMS(gvar); // map in used pages
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859 // detect XMS and get upper memory blocks
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862 gvar->mmi.XMSmem = 0;
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863 goto xmsskip;//0000
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864 if(MML_CheckForXMS(gvar))
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866 MML_SetupXMS(gvar); // allocate as many UMBs as possible
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870 // allocate the misc buffer
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873 gvar->mm.mmrover = gvar->mm.mmhead; // start looking for space after low block
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875 MM_GetPtr(&(gvar->mm.bufferseg),BUFFERSIZE, gvar);
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878 //==========================================================================
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881 ====================
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885 = Frees all conventional, EMS, and XMS allocated
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887 ====================
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890 void MM_Shutdown(global_game_variables_t *gvar)
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892 if(!(gvar->mm.mmstarted))
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895 _ffree(gvar->mm.farheap);// printf(" far freed\n");
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897 _nfree(gvar->mm.nearheap);// printf(" near freed\n");
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899 #ifdef __BORLANDC__
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900 free(gvar->mm.nearheap);// printf(" near freed\n");
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902 #ifndef __DEBUG_PM__
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903 if(MML_CheckForEMS()){ MML_ShutdownEMS(gvar); }//printf(" EMS freed\n"); }
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904 if(MML_CheckForXMS(gvar)){ MML_ShutdownXMS(gvar); }//printf(" XMS freed\n"); } //INFO: 16_PM dose this job better
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908 //==========================================================================
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911 ====================
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915 = Allocates an unlocked, unpurgable block
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917 ====================
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920 void MM_GetPtr (memptr *baseptr, dword size, global_game_variables_t *gvar)
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922 //huge mmblocktype huge *scan,huge *lastscan,huge *endscan,huge *purge,huge *next;
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923 mmblocktype far *scan,far *lastscan,far *endscan,far *purge,far *next;
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925 unsigned needed,startseg;
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927 needed = (size+15)/16; // convert size from bytes to paragraphs
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929 GETNEWBLOCK; // fill in start and next after a spot is found
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930 gvar->mm.mmnew->length = needed;
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931 gvar->mm.mmnew->useptr = baseptr;
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932 //if(gvar->mm.mmnew->useptr==NULL){
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934 printf(" MM_GetPtr\n");
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935 printf(" baseptr=%04x ", baseptr); printf("useptr=%04x\n", gvar->mm.mmnew->useptr);
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936 printf(" *baseptr=%04x ", *baseptr); printf("*useptr=%04x\n", *(gvar->mm.mmnew->useptr));
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937 printf(" *baseptr=%Fp ", *baseptr); printf("*useptr=%Fp\n", *(gvar->mm.mmnew->useptr));
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940 gvar->mm.mmnew->attributes = BASEATTRIBUTES;
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943 for (search = 0; search<3; search++)
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946 // first search: try to allocate right after the rover, then on up
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947 // second search: search from the head pointer up to the rover
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948 // third search: compress memory, then scan from start
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949 if (search == 1 && gvar->mm.mmrover == gvar->mm.mmhead)
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955 lastscan = gvar->mm.mmrover;
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956 scan = gvar->mm.mmrover->next;
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960 lastscan = gvar->mm.mmhead;
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961 scan = gvar->mm.mmhead->next;
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962 endscan = gvar->mm.mmrover;
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966 lastscan = gvar->mm.mmhead;
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967 scan = gvar->mm.mmhead->next;
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972 startseg = lastscan->start + lastscan->length;
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974 while (scan != endscan)
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976 if (scan->start - startseg >= needed)
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979 // got enough space between the end of lastscan and
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980 // the start of scan, so throw out anything in the middle
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981 // and allocate the new block
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983 purge = lastscan->next;
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984 lastscan->next = gvar->mm.mmnew;
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985 gvar->mm.mmnew->start = *(unsigned *)baseptr = startseg;
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986 gvar->mm.mmnew->next = scan;
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987 while ( purge != scan)
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988 { // free the purgable block
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989 next = purge->next;
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991 purge = next; // purge another if not at scan
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993 gvar->mm.mmrover = gvar->mm.mmnew;
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994 return; // good allocation!
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998 // if this block is purge level zero or locked, skip past it
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1000 if ( (scan->attributes & LOCKBIT)
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1001 || !(scan->attributes & PURGEBITS) )
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1004 startseg = lastscan->start + lastscan->length;
\r
1008 scan=scan->next; // look at next line
\r
1012 if (gvar->mm.bombonerror)
\r
1014 #ifdef __WATCOMC__
\r
1017 printf(OUT_OF_MEM_MSG,(size-gvar->mmi.nearheap));
\r
1018 printf("for stability reasons the program will shut down! wwww\n");
\r
1019 MM_Shutdown(gvar);
\r
1023 gvar->mm.mmerror = true;
\r
1026 //==========================================================================
\r
1029 ====================
\r
1033 = Allocates an unlocked, unpurgable block
\r
1035 ====================
\r
1038 void MM_FreePtr(memptr *baseptr, global_game_variables_t *gvar)
\r
1040 //huge mmblocktype huge *scan,huge *last;
\r
1041 mmblocktype far *scan,far *last;
\r
1043 last = gvar->mm.mmhead;
\r
1044 scan = last->next;
\r
1046 if(baseptr == gvar->mm.mmrover->useptr) // removed the last allocated block
\r
1047 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1049 while(scan->useptr != baseptr && scan)
\r
1052 scan = scan->next;
\r
1057 printf("MM_FreePtr: Block not found!\n");
\r
1061 last->next = scan->next;
\r
1065 //==========================================================================
\r
1068 =====================
\r
1072 = Sets the purge level for a block (locked blocks cannot be made purgable)
\r
1074 =====================
\r
1077 void MM_SetPurge(memptr *baseptr, int purge, global_game_variables_t *gvar)
\r
1079 //huge mmblocktype huge *start;
\r
1080 mmblocktype far *start;
\r
1082 start = gvar->mm.mmrover;
\r
1086 if(gvar->mm.mmrover->useptr == baseptr)
\r
1089 gvar->mm.mmrover = gvar->mm.mmrover->next;
\r
1091 if(!gvar->mm.mmrover)
\r
1092 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1093 else if(gvar->mm.mmrover == start)
\r
1095 #ifdef __DEBUG_PM__
\r
1096 printf("\nstart->useptr gvar->mm.mmhead->useptr\n");
\r
1097 printf(" %Fp %Fp\n", start->useptr, gvar->mm.mmhead->useptr);
\r
1098 printf("& %Fp %Fp\n", &(start->useptr), &(gvar->mm.mmhead->useptr));
\r
1099 printf("baseptr gvar->mm.mmrover->useptr\n");
\r
1100 printf(" %Fp %Fp\n", baseptr, gvar->mm.mmrover->useptr);
\r
1101 printf("& %Fp %Fp\n", &(baseptr), &(gvar->mm.mmrover->useptr));
\r
1102 printf("* %Fp %Fp\n", *(baseptr), *(gvar->mm.mmrover->useptr));
\r
1103 printf("start gvar->mm.mmrover gvar->mm.mmrover->next\n");
\r
1104 printf(" %Fp %Fp %Fp\n", start, gvar->mm.mmrover, gvar->mm.mmrover->next);
\r
1105 printf("& %Fp %Fp %Fp\n", &start, &gvar->mm.mmrover, gvar->mm.mmrover->next);
\r
1107 MM_ShowMemory(gvar);
\r
1108 MM_DumpData(gvar);
\r
1112 Quit("MM_SetPurge: Block not found!");
\r
1118 gvar->mm.mmrover->attributes &= ~PURGEBITS;
\r
1119 gvar->mm.mmrover->attributes |= purge;
\r
1122 //==========================================================================
\r
1125 =====================
\r
1129 = Locks / unlocks the block
\r
1131 =====================
\r
1134 void MM_SetLock(memptr *baseptr, boolean locked, global_game_variables_t *gvar)
\r
1136 //huge mmblocktype huge *start;
\r
1137 mmblocktype far *start;
\r
1139 start = gvar->mm.mmrover;
\r
1143 if(gvar->mm.mmrover->useptr == baseptr)
\r
1146 gvar->mm.mmrover = gvar->mm.mmrover->next;
\r
1148 if(!gvar->mm.mmrover)
\r
1149 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1150 else if(gvar->mm.mmrover == start)
\r
1152 Quit("MM_SetLock: Block not found!");
\r
1158 gvar->mm.mmrover->attributes &= ~LOCKBIT;
\r
1159 gvar->mm.mmrover->attributes |= locked*LOCKBIT;
\r
1162 //==========================================================================
\r
1165 =====================
\r
1169 = Throws out all purgable stuff and compresses movable blocks
\r
1171 =====================
\r
1174 void MM_SortMem(global_game_variables_t *gvar)
\r
1176 //huge mmblocktype huge *scan,huge *last,huge *next;
\r
1177 mmblocktype far *scan,far *last,far *next;
\r
1178 unsigned start,length,source,dest,oldborder;
\r
1182 // lock down a currently playing sound
\r
1184 /*++++ playing = SD_SoundPlaying ();
\r
1187 switch (SoundMode)
\r
1190 playing += STARTPCSOUNDS;
\r
1193 playing += STARTADLIBSOUNDS;
\r
1196 MM_SetLock(&(memptr)audiosegs[playing],true);
\r
1201 // oldborder = bordercolor;
\r
1202 // VW_ColorBorder (15);
\r
1207 scan = gvar->mm.mmhead;
\r
1209 last = NULL; // shut up compiler warning
\r
1213 if(scan->attributes & LOCKBIT)
\r
1216 // block is locked, so try to pile later blocks right after it
\r
1218 start = scan->start + scan->length;
\r
1222 if(scan->attributes & PURGEBITS)
\r
1225 // throw out the purgable block
\r
1227 next = scan->next;
\r
1229 //MM_FreeBlock(scan, gvar);
\r
1230 last->next = next;
\r
1237 // push the non purgable block on top of the last moved block
\r
1239 if(scan->start != start)
\r
1241 length = scan->length;
\r
1242 source = scan->start;
\r
1244 while(length > 0xf00)
\r
1246 movedata(source,0,dest,0,0xf00*16);
\r
1251 movedata(source,0,dest,0,length*16);
\r
1253 scan->start = start;
\r
1254 *(unsigned *)scan->useptr = start;
\r
1256 start = scan->start + scan->length;
\r
1261 scan = scan->next; // go to next block
\r
1264 gvar->mm.mmrover = gvar->mm.mmhead;
\r
1269 // VW_ColorBorder (oldborder);
\r
1271 /*++++ if(playing)
\r
1272 MM_SetLock(&(memptr)audiosegs[playing],false);*/
\r
1275 //==========================================================================
\r
1278 =====================
\r
1282 =====================
\r
1285 void MM_ShowMemory(global_game_variables_t *gvar)
\r
1287 //huge mmblocktype huge *scan;
\r
1288 mmblocktype far *scan;
\r
1294 byte scratch[160],scratch0[4096],scratch1[160],str[16];
\r
1296 //**** VW_SetDefaultColors();
\r
1297 //**** VW_SetLineWidth(40);
\r
1298 //++++mh temp = bufferofs;
\r
1299 //++++mh bufferofs = 0;
\r
1300 //**** VW_SetScreen (0,0);
\r
1301 scan = gvar->mm.mmhead;
\r
1304 CA_OpenDebug (gvar);
\r
1308 strcpy(scratch, AARESET);
\r
1309 if(scan->attributes & PURGEBITS)
\r
1310 strcpy(scratch0, AAMAGENTA); // dark purple = purgable
\r
1312 strcpy(scratch0, AABLUE); // medium blue = non purgable
\r
1313 if(scan->attributes & LOCKBIT)
\r
1314 strcpy(scratch0, AARED); // red = locked
\r
1315 if(scan->start<=end)
\r
1317 printf("\nend==%d\n\n", end);
\r
1318 strcat(scratch, "MM_ShowMemory: Memory block order currupted!\n");
\r
1319 strcat(scratch, "End's Size: ");
\r
1320 ultoa (end,str,10);
\r
1321 strcat (scratch,str);
\r
1322 strcat(scratch, "\nscan->start's Size: ");
\r
1323 ultoa (scan->start,str,10);
\r
1324 strcat (scratch,str);
\r
1325 write(gvar->handle.debughandle,scratch,strlen(scratch));
\r
1326 //modexprint(&page, chx, chy, 1, 0, 24, "\nMM_ShowMemory: Memory block order currupted!\n");
\r
1329 end = scan->start+(scan->length)-1;
\r
1330 //++++ chy = scan->start/320;
\r
1331 //++++ chx = scan->start%320;
\r
1332 //modexhlin(page, scan->start, (unsigned)end, chy, color);
\r
1333 //for(chx=scan->start;chx+4>=(word)end;chx+=4)
\r
1335 //++++ modexClearRegion(page, chx, chy, 4, 4, color);
\r
1337 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
\r
1338 for(w=(scan->start)/80;w<=end/80;w++)
\r
1340 //printf("+ %u %lu\n", w, scan->length);
\r
1341 strcat(scratch0, "+");
\r
1343 //++==++==optional strcat(scratch0, AARESET); strcat(scratch0, AAGREY); strcat(scratch0,"_");
\r
1344 //++++ VW_Plot(scan->start,0,15);
\r
1345 //++++ modexClearRegion(page, chx, chy, 4, 4, 15);
\r
1346 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
\r
1348 //wwww=(dword)(scan->next->start)-(dword)scan->start;
\r
1349 //wwww=(dword)scan->start+(dword)(scan->next->start);
\r
1350 if (scan->next && scan->next->start >= end+1)
\r
1352 strcat(scratch0, AARESET);
\r
1353 //++==++==optional strcat(scratch0, "\n");
\r
1354 strcat(scratch0,AAGREEN);
\r
1355 for(w=(end+1)/80;w<=((scan->next->start-scan->start)/80);w++)
\r
1356 //for(w=(wwww)/80;w<=((end+1)/80);w++)
\r
1357 //for(w=(end+1)/80;w<=((wwww)/80);w++)
\r
1359 //printf("0 %x %u %lu\n", scan->next->start, w, scan->length);
\r
1360 strcat(scratch0,"0");
\r
1362 //printf("==================\n");
\r
1363 //printf("w=%u wwww=%lu start=%04x next=%04x end=%lu\n", w/80, wwww/80, scan->start, (scan->next->start), end+1);
\r
1364 //printf("==================\n");
\r
1365 strcat(scratch0, "\n");
\r
1367 }/*else {//if(scan->next->start <= scan->start){
\r
1368 scan->next->start=scan->start+0x1000;
\r
1369 wwww=(dword)(scan->next->start)-(dword)scan->start;
\r
1370 strcat(scratch0, AARESET);
\r
1371 strcat(scratch0, "\n");
\r
1372 strcat(scratch0,AAGREEN);
\r
1373 for(w=(end+1);w<=(0x1000/80);w++)
\r
1375 //printf("0 %x %x %u\n", scan->start, w);
\r
1376 strcat(scratch0,"0");
\r
1378 printf("================\n");
\r
1379 printf("w=%x start=%x next=%x end=%u %lu\n", w, scan->start, (scan->next->start), end+1, wwww);
\r
1380 printf("================\n");
\r
1383 strcat(scratch0, AARESET);
\r
1384 //strcat(scratch0,"\n");
\r
1385 //for(chx=scan->next->start;chx+4>=(word)end+1;chx+=4)
\r
1387 // chx+=scan->next->start;
\r
1388 // modexClearRegion(page, chx, chy, 4, 4, 2);
\r
1390 //modexhlin(page, end+1,scan->next->start, chy, 0);
\r
1391 /* y = scan->start/320;
\r
1392 x = scan->start%320;
\r
1393 VW_Hlin(x,x+end,y,color);
\r
1394 VW_Plot(x,y,15);*/
\r
1395 //++++ VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free
\r
1396 strcat(scratch,"Seg:");
\r
1397 ultoa (scan->start,str,16);
\r
1398 strcat (scratch,str);
\r
1399 strcat (scratch,"\tSize:");
\r
1400 ultoa ((unsigned)scan->length,str,10);
\r
1401 strcat (scratch,str);
\r
1402 strcat (scratch,"\tOwner:0x");
\r
1403 owner = (unsigned)scan->useptr;
\r
1404 ultoa (owner,str,16);
\r
1405 strcat (scratch,str);
\r
1406 strcat (scratch,"\n");
\r
1407 write(gvar->handle.debughandle,scratch,strlen(scratch));
\r
1408 write(gvar->handle.debughandle,scratch0,strlen(scratch0));
\r
1409 //modexprint(page, chx, chy, 1, 0, 24, &scratch);
\r
1411 //fprintf(stdout, "%s", scratch);
\r
1413 scan = scan->next;
\r
1415 /*strcpy(scratch1, AARESET);
\r
1416 strcat(scratch1, "========================================\n");
\r
1417 strcat(scratch1, "near= ");
\r
1418 ultoa (*(gvar->mm.nearheap),str,10);
\r
1419 strcat (scratch1,str);
\r
1420 strcat(scratch1, " far= ");
\r
1421 ultoa (*(gvar->mm.farheap),str,10);
\r
1422 strcat (scratch1,str);
\r
1423 strcat(scratch1, "\n");
\r
1424 //strcat(scratch1, "&near= %Fp ", &(gvar->mm.nearheap));
\r
1425 //strcat(scratch1, "&far= %Fp", &(gvar->mm.farheap));
\r
1426 //strcat(scratch1, "\n");
\r
1427 strcat(scratch1, "========================================\n");
\r
1428 write(gvar->handle.debughandle,scratch1,strlen(scratch1));*/
\r
1431 CA_CloseDebug (gvar);
\r
1433 //++++mh IN_Ack();
\r
1434 //**** VW_SetLineWidth(64);
\r
1435 //++++mh bufferofs = temp;
\r
1438 //==========================================================================
\r
1441 =====================
\r
1445 =====================
\r
1448 void MM_DumpData(global_game_variables_t *gvar)
\r
1450 //huge mmblocktype huge *scan,huge *best;
\r
1451 mmblocktype far *scan,far *best;
\r
1452 long lowest,oldlowest;
\r
1457 free(gvar->mm.nearheap);
\r
1458 #ifdef __BORLANDC__
\r
1459 dumpfile = fopen ("mmdump.16b","w");
\r
1461 #ifdef __WATCOMC__
\r
1462 dumpfile = fopen ("mmdump.16w","w");
\r
1465 printf("MM_DumpData: Couldn't open MMDUMP.16!\n");
\r
1472 oldlowest = lowest;
\r
1475 scan = gvar->mm.mmhead;
\r
1478 owner = (unsigned)scan->useptr;
\r
1480 if (owner && owner<lowest && owner > oldlowest)
\r
1486 scan = scan->next;
\r
1489 if (lowest != 0xffff)
\r
1491 if (best->attributes & PURGEBITS)
\r
1495 if (best->attributes & LOCKBIT)
\r
1499 fprintf (dumpfile,"0x%p (%c%c) = %u\n"
\r
1500 ,(unsigned)lowest,lock,purge,best->length);
\r
1503 } while (lowest != 0xffff);
\r
1506 printf("MMDUMP.16 created.\n");
\r
1509 //==========================================================================
\r
1513 ======================
\r
1517 = Returns the total free space without purging
\r
1519 ======================
\r
1522 dword MM_UnusedMemory(global_game_variables_t *gvar)
\r
1525 //huge mmblocktype huge *scan;
\r
1526 mmblocktype far *scan;
\r
1529 scan = gvar->mm.mmhead;
\r
1533 free += scan->next->start - (scan->start + scan->length);
\r
1534 scan = scan->next;
\r
1541 //==========================================================================
\r
1545 ======================
\r
1549 = Returns the total free space with purging
\r
1551 ======================
\r
1554 dword MM_TotalFree(global_game_variables_t *gvar)
\r
1557 //huge mmblocktype huge *scan;
\r
1558 mmblocktype far *scan;
\r
1561 scan = gvar->mm.mmhead;
\r
1565 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
\r
1566 free += scan->length;
\r
1567 free += scan->next->start - (scan->start + scan->length);
\r
1568 scan = scan->next;
\r
1575 //==========================================================================
\r
1578 =====================
\r
1582 =====================
\r
1585 void MM_Report_(global_game_variables_t *gvar)
\r
1587 printf("========================================\n");
\r
1588 printf(" MM_Report\n");
\r
1589 printf("========================================\n");
\r
1590 if(MML_CheckForEMS())
\r
1592 printf(" LIMEMS\n");
\r
1593 printf(" EMM v%x.%x available\n", gvar->pm.emm.EMSVer>>4,gvar->pm.emm.EMSVer&0x0F);
\r
1594 printf(" totalEMSpages: %u ", gvar->pm.emm.totalEMSpages); printf("freeEMSpages: %u\n", gvar->pm.emm.freeEMSpages);
\r
1595 printf(" EMSPageFrame: %x\n", gvar->pm.emm.EMSPageFrame);
\r
1597 if(MML_CheckForXMS(gvar))
\r
1600 printf(" XMSaddr: %X\n", *XMSaddr);
\r
1602 printf("near: %lu ", gvar->mmi.nearheap); printf("far: %lu\n", gvar->mmi.farheap); if(MML_CheckForEMS())
\r
1603 printf("EMSmem: %lu ", gvar->mmi.EMSmem); if(MML_CheckForXMS(gvar)) printf("XMSmem: %lu", gvar->mmi.XMSmem); printf("\n");
\r
1604 //printf("mainmem: %lu\n", gvar->mmi.mainmem);
\r
1605 printf("Total convmem: %lu ", gvar->mmi.mainmem); printf("TotalFree: %lu ", MM_TotalFree(gvar)); printf("TotalUsed: %lu\n", gvar->mmi.mainmem+gvar->mmi.EMSmem+gvar->mmi.XMSmem+gvar->mmi.XMSmem);
\r
1606 printf(" UnusedMemory: %lu\n", MM_UnusedMemory(gvar));
\r
1609 //==========================================================================
\r
1612 =====================
\r
1616 =====================
\r
1619 void MM_EMSerr(byte *stri, byte err)
\r
1621 //Returns a text string describing the error code in EMS.Error.
\r
1625 strcat(stri, "successful");
\r
1628 strcat(stri, "internal error");
\r
1631 strcat(stri, "hardware malfunction");
\r
1634 strcat(stri, "busy .. retry later");
\r
1637 strcat(stri, "invalid handle");
\r
1640 strcat(stri, "undefined function requested by application");
\r
1643 strcat(stri, "no more handles available");
\r
1646 strcat(stri, "error in save or restore of mapping context");
\r
1649 strcat(stri, "insufficient memory pages in system");
\r
1652 strcat(stri, "insufficient memory pages available");
\r
1655 strcat(stri, "zero pages requested");
\r
1658 strcat(stri, "invalid logical page number encountered");
\r
1661 strcat(stri, "invalid physical page number encountered");
\r
1664 strcat(stri, "page-mapping hardware state save area is full");
\r
1667 strcat(stri, "save of mapping context failed");
\r
1670 strcat(stri, "restore of mapping context failed");
\r
1673 strcat(stri, "undefined subfunction");
\r
1676 strcat(stri, "undefined attribute type");
\r
1679 strcat(stri, "feature not supported");
\r
1682 strcat(stri, "successful, but a portion of the source region has been overwritten");
\r
1685 strcat(stri, "length of source or destination region exceeds length of region allocated to either source or destination handle");
\r
1688 strcat(stri, "conventional and expanded memory regions overlap");
\r
1691 strcat(stri, "offset within logical page exceeds size of logical page");
\r
1694 strcat(stri, "region length exceeds 1 MB");
\r
1697 strcat(stri, "source and destination EMS regions have same handle and overlap");
\r
1700 strcat(stri, "memory source or destination type undefined");
\r
1703 strcat(stri, "specified alternate map register or DMA register set not supported");
\r
1706 strcat(stri, "all alternate map register or DMA register sets currently allocated");
\r
1709 strcat(stri, "alternate map register or DMA register sets not supported");
\r
1712 strcat(stri, "undefined or unallocated alternate map register or DMA register set");
\r
1715 strcat(stri, "dedicated DMA channels not supported");
\r
1718 strcat(stri, "specified dedicated DMA channel not supported");
\r
1721 strcat(stri, "no such handle name");
\r
1724 strcat(stri, "a handle found had no name, or duplicate handle name");
\r
1727 strcat(stri, "attempted to wrap around 1M conventional address space");
\r
1730 strcat(stri, "source array corrupted");
\r
1733 strcat(stri, "operating system denied access");
\r
1736 strcat(stri, "undefined error");
\r
1740 //==========================================================================
\r
1743 =====================
\r
1747 =====================
\r
1750 void MM_BombOnError(boolean bomb, global_game_variables_t *gvar)
\r
1752 gvar->mm.bombonerror = bomb;
\r
1755 /*void MM_GetNewBlock(global_game_variables_t *gvar)
\r
1757 if(!gvar->mm.mmfree)
\r
1758 MML_ClearBlock(gvar);
\r
1759 gvar->mm.mmnew=gvar->mm.mmfree;
\r
1760 gvar->mm.mmfree=gvar->mm.mmfree->next;
\r
1761 if(!(gvar->mm.mmnew=gvar->mm.mmfree))
\r
1763 printf("MM_GETNEWBLOCK: No free blocks!\n");
\r
1766 gvar->mm.mmfree=gvar->mm.mmfree->next;
\r
1769 void MM_FreeBlock(mmblocktype *x, global_game_variables_t *gvar)
\r
1772 x->next=gvar->mm.mmfree;
\r
1773 gvar->mm.mmfree=x;
\r
1776 /*void MM_seguin(void)
\r
1786 void MM_segude(void)
\r
1794 pull data from far and put it into ds var
\r
1801 bp bottem of stack
\r