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keep some lower limit for allocated vga memory

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3093
This commit is contained in:
Sebastian Strohhäcker 2008-02-05 17:58:14 +00:00
parent 09622a48af
commit cb40dff18b
1 changed files with 7 additions and 3 deletions
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10
src/hardware/vga_memory.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: vga_memory.cpp,v 1.48 2008-02-02 20:47:24 c2woody Exp $ */
/* $Id: vga_memory.cpp,v 1.49 2008-02-05 17:58:14 c2woody Exp $ */
#include <stdlib.h>
#include <string.h>
@ -902,10 +902,14 @@ void VGA_SetupMemory(Section* sec) {
vga.svga.bank_read = vga.svga.bank_write = 0;
vga.svga.bank_read_full = vga.svga.bank_write_full = 0;
Bit32u vga_allocsize=vga.vmemsize;
// Keep lower limit at 512k
if (vga_allocsize<512*1024) vga_allocsize=512*1024;
// We reserve extra 2K for one scan line
vga.mem.linear_orgptr = new Bit8u[vga.vmemsize+2048+16];
vga_allocsize+=2048+16;
vga.mem.linear_orgptr = new Bit8u[vga_allocsize];
vga.mem.linear=(Bit8u*)(((Bitu)vga.mem.linear_orgptr + 16-1) & ~(16-1));
memset(vga.mem.linear,0,vga.vmemsize);
memset(vga.mem.linear,0,vga_allocsize);
vga.fastmem_orgptr = new Bit8u[(vga.vmemsize<<1)+4096+16];
vga.fastmem=(Bit8u*)(((Bitu)vga.fastmem_orgptr + 16-1) & ~(16-1));