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Some bizarre vga dac behaviour fixes star control 2

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2204
This commit is contained in:
Sjoerd van der Berg 2005-05-02 21:18:01 +00:00
parent 347c222b93
commit 640e9475b1
1 changed files with 3 additions and 1 deletions
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4
src/hardware/vga_dac.cpp
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@ -66,7 +66,7 @@ static void write_p3c7(Bitu port,Bitu val,Bitu iolen) {
vga.dac.read_index=val;
vga.dac.pel_index=0;
vga.dac.state=DAC_READ;
vga.dac.write_index= val + 1;
}
static Bitu read_p3c7(Bitu port,Bitu iolen) {
@ -118,6 +118,7 @@ static void write_p3c9(Bitu port,Bitu val,Bitu iolen) {
}
}
vga.dac.write_index++;
vga.dac.read_index = vga.dac.write_index - 1;
vga.dac.pel_index=0;
break;
default:
@ -140,6 +141,7 @@ static Bitu read_p3c9(Bitu port,Bitu iolen) {
ret=vga.dac.rgb[vga.dac.read_index].blue;
vga.dac.read_index++;
vga.dac.pel_index=0;
vga.dac.write_index=vga.dac.read_index+1;
break;
default:
LOG(LOG_VGAMISC,LOG_NORMAL)("VGA:DAC:Illegal Pel Index"); //If this can actually happen that will be the day