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INT10 support for video blanking

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3569
This commit is contained in:
Ralf Grillenberger 2010-04-04 18:49:21 +00:00
parent 6be8956f46
commit f1be5cbac0
1 changed files with 12 additions and 6 deletions
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18
src/ints/int10.cpp
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@ -419,18 +419,24 @@ graphics_chars:
LOG(LOG_INT10,LOG_ERROR)("Function 12:Call %2X not handled",reg_bl);
reg_al=0x12;
break;
case 0x36: /* VGA Refresh control */
case 0x36: { /* VGA Refresh control */
if (!IS_VGA_ARCH) break;
if ((svgaCard==SVGA_S3Trio) && (reg_al>1)) {
reg_al=0;
break;
}
/*
Call disables/enables the vga from outputting video,
don't support it, but fake a success return
*/
reg_al=0x12;
IO_Write(0x3c4,0x1);
Bit8u clocking = IO_Read(0x3c5);
if (reg_al==0) clocking &= ~0x20;
else clocking |= 0x20;
IO_Write(0x3c4,0x1);
IO_Write(0x3c5,clocking);
reg_al=0x12; // success
break;
}
default:
LOG(LOG_INT10,LOG_ERROR)("Function 12:Call %2X not handled",reg_bl);
if (machine!=MCH_EGA) reg_al=0;