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Add beta2 patch: Some hack to make SKYRICA work. (allocate a zero xms page to get a pointer to xms memory area)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2736
This commit is contained in:
Peter Veenstra 2007-01-08 21:40:15 +00:00
parent 0cca0c96cf
commit 779ab9f715
3 changed files with 16 additions and 5 deletions
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1
include/mem.h
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@ -44,6 +44,7 @@ Bitu MEM_FreeLargest(void); //Largest free 4 kb pages block
Bitu MEM_TotalPages(void); //Total amount of 4 kb pages
Bitu MEM_AllocatedPages(MemHandle handle); // amount of allocated pages of handle
MemHandle MEM_AllocatePages(Bitu pages,bool sequence);
MemHandle MEM_GetNextFreePage(void);
PhysPt MEM_AllocatePage(void);
void MEM_ReleasePages(MemHandle handle);
bool MEM_ReAllocatePages(MemHandle & handle,Bitu pages,bool sequence);

6
src/hardware/memory.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: memory.cpp,v 1.46 2007-01-08 19:45:40 qbix79 Exp $ */
/* $Id: memory.cpp,v 1.47 2007-01-08 21:40:15 qbix79 Exp $ */
#include "dosbox.h"
#include "mem.h"
@ -291,6 +291,10 @@ MemHandle MEM_AllocatePages(Bitu pages,bool sequence) {
return ret;
}
MemHandle MEM_GetNextFreePage(void) {
return (MemHandle)BestMatch(1);
}
void MEM_ReleasePages(MemHandle handle) {
while (handle>0) {
MemHandle next=memory.mhandles[handle];

14
src/ints/xms.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: xms.cpp,v 1.45 2007-01-08 20:10:34 qbix79 Exp $ */
/* $Id: xms.cpp,v 1.46 2007-01-08 21:40:15 qbix79 Exp $ */
#include <stdlib.h>
#include <string.h>
@ -134,9 +134,15 @@ Bitu XMS_AllocateMemory(Bitu size, Bit16u& handle) { // size = kb
while (!xms_handles[index].free) {
if (++index>=XMS_HANDLES) return XMS_OUT_OF_HANDLES;
}
Bitu pages=(size/4) + ((size & 3) ? 1 : 0);
MemHandle mem=MEM_AllocatePages(pages,true);
if ((!mem) && (size != 0)) return XMS_OUT_OF_SPACE;
MemHandle mem;
if (size!=0) {
Bitu pages=(size/4) + ((size & 3) ? 1 : 0);
mem=MEM_AllocatePages(pages,true);
if (!mem) return XMS_OUT_OF_SPACE;
} else {
mem=MEM_GetNextFreePage();
if (mem==0) LOG(LOG_MISC,LOG_ERROR)("XMS:Allocate zero pages with no memory left");
}
xms_handles[index].free=false;
xms_handles[index].mem=mem;
xms_handles[index].locked=0;