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Remove defunct code related to the initial display mode of the system BIOS during video mode changes.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@4276
This commit is contained in:
ripsaw8080 2019-10-27 19:08:57 +00:00
parent 2bf589f54f
commit b79f76ad4d
1 changed files with 0 additions and 8 deletions
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8
src/ints/int10_modes.cpp
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@ -1333,23 +1333,18 @@ dac_text16:
real_writeb(RealSeg(dsapt),RealOff(dsapt)+0x10,0); // overscan
}
/* Setup some special stuff for different modes */
Bit8u feature=real_readb(BIOSMEM_SEG,BIOSMEM_INITIAL_MODE);
switch (CurMode->type) {
case M_CGA2:
feature=(feature&~0x30)|0x20;
real_writeb(BIOSMEM_SEG,BIOSMEM_CURRENT_MSR,0x1e);
break;
case M_CGA4:
feature=(feature&~0x30)|0x20;
if (CurMode->mode==4) real_writeb(BIOSMEM_SEG,BIOSMEM_CURRENT_MSR,0x2a);
else if (CurMode->mode==5) real_writeb(BIOSMEM_SEG,BIOSMEM_CURRENT_MSR,0x2e);
else real_writeb(BIOSMEM_SEG,BIOSMEM_CURRENT_MSR,0x2);
break;
case M_TANDY16:
feature=(feature&~0x30)|0x20;
break;
case M_TEXT:
feature=(feature&~0x30)|0x20;
switch (CurMode->mode) {
case 0:real_writeb(BIOSMEM_SEG,BIOSMEM_CURRENT_MSR,0x2c);break;
case 1:real_writeb(BIOSMEM_SEG,BIOSMEM_CURRENT_MSR,0x28);break;
@ -1361,11 +1356,8 @@ dac_text16:
case M_LIN4:
case M_EGA:
case M_VGA:
feature=(feature&~0x30);
break;
}
// disabled, has to be set in bios.cpp exclusively
// real_writeb(BIOSMEM_SEG,BIOSMEM_INITIAL_MODE,feature);
if (svgaCard == SVGA_S3Trio) {
/* Setup the CPU Window */