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Zero memory after we allocate it. Dosbox needs zeroed memory to operate correctly

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2259
This commit is contained in:
Peter Veenstra 2005-07-31 13:59:02 +00:00
parent c3be7fcdec
commit 58a0aaed55
1 changed files with 6 additions and 9 deletions
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15
src/hardware/memory.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: memory.cpp,v 1.38 2005-07-30 10:11:40 qbix79 Exp $ */
/* $Id: memory.cpp,v 1.39 2005-07-31 13:59:02 qbix79 Exp $ */
#include "dosbox.h"
#include "mem.h"
@ -25,6 +25,8 @@
#include "paging.h"
#include "regs.h"
#include <string.h>
#define PAGES_IN_BLOCK ((1024*1024)/MEM_PAGE_SIZE)
#define MAX_MEMORY 64
#define MAX_PAGE_ENTRIES (MAX_MEMORY*1024*1024/4096)
@ -490,6 +492,9 @@ public:
}
MemBase = new Bit8u[memsize*1024*1024];
if (!MemBase) E_Exit("Can't allocate main memory of %d MB",memsize);
/* Clear the memory, as new doesn't always give zeroed memory
* (Visual C debug mode). We want zeroed memory though. */
memset((void*)MemBase,0,memsize*1024*1024);
memory.pages = (memsize*1024*1024)/4096;
/* Allocate the data for the different page information blocks */
memory.phandlers=new PageHandler * [memory.pages];
@ -531,12 +536,4 @@ void MEM_Init(Section * sec) {
/* shutdown function */
test = new MEMORY(sec);
sec->AddDestroyFunction(&MEM_ShutDown);
// initialize interrupt handlers to 0
// this makes availible interrupts detectable even in compiler debug mode
// tyrian network helper app is suffering from this
//
// DISABLED IT BY DEFAULT. (qbix79). But the code is there in case
// somebody needs it
//for(Bitu icntr = 0; icntr <0xFF; icntr++) RealSetVec(icntr,0);
}