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add default palette skipping on modeset functionality (int10 alternate function select; fixes WW2 Battles of the South Pacific)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2902
This commit is contained in:
Sebastian Strohhäcker 2007-06-28 16:32:45 +00:00
parent f034692ce8
commit cd9b01ef68
2 changed files with 74 additions and 54 deletions
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18
src/ints/int10.cpp
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@ -299,6 +299,21 @@ graphics_chars:
reg_bl=3; //256 kb
reg_cx=real_readb(BIOSMEM_SEG,BIOSMEM_SWITCHES) & 0x0F;
break;
case 0x20: /* Set alternate printscreen */
break;
case 0x30: /* Select vertical resolution */
case 0x32: /* Video adressing */
LOG(LOG_INT10,LOG_ERROR)("Function 12:Call %2X not handled",reg_bl);
reg_al=0x12; //fake a success call
break;
case 0x31: /* Palette loading on modeset */
{
Bit8u temp = real_readb(BIOSMEM_SEG,BIOSMEM_MODESET_CTL) & 0xf7;
if (reg_al&1) temp|=8; // enable if al=0
real_writeb(BIOSMEM_SEG,BIOSMEM_MODESET_CTL,temp);
reg_al=0x12;
break;
}
case 0x33: /* SWITCH GRAY-SCALE SUMMING */
{
Bit8u temp = real_readb(BIOSMEM_SEG,BIOSMEM_MODESET_CTL) & 0xfd;
@ -324,7 +339,8 @@ graphics_chars:
break;
default:
LOG(LOG_INT10,LOG_ERROR)("Function 12:Call %2X not handled",reg_bl);
reg_al=0x12; //Always fake a success call
reg_al=0x12; // wrong!?
break;
}
break;
case 0x13: /* Write String */