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some vga bioses scramble the high part of ax for int10/ah=1a (fixes Gizmos&Gadgets graphics card detection)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3136
This commit is contained in:
Sebastian Strohhäcker 2008-03-31 14:43:34 +00:00
parent cb14a46164
commit 9c4907d078
1 changed files with 3 additions and 3 deletions
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6
src/ints/int10.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: int10.cpp,v 1.50 2008-03-14 18:16:34 c2woody Exp $ */
/* $Id: int10.cpp,v 1.51 2008-03-31 14:43:34 c2woody Exp $ */
#include "dosbox.h"
#include "mem.h"
@ -426,7 +426,7 @@ graphics_chars:
else reg_bx=dccentry;
} else reg_bx=0xffff;
} else reg_bx=0xffff;
reg_al=0x1A;
reg_ax=0x1A; // high part destroyed or zeroed depending on BIOS
} else if (reg_al==1) { // set dcc
Bit8u newidx=0xff;
// walk the tables...
@ -450,7 +450,7 @@ graphics_chars:
}
real_writeb(BIOSMEM_SEG,BIOSMEM_DCC_INDEX,newidx);
reg_al=0x1A;
reg_ax=0x1A; // high part destroyed or zeroed depending on BIOS
}
break;
case 0x1B: /* functionality State Information */