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Fix page not getting selected with hercules

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1594
This commit is contained in:
Sjoerd van der Berg 2004-01-18 15:40:09 +00:00
parent ca58b4cf61
commit 755240bdf3
1 changed files with 5 additions and 7 deletions
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12
src/hardware/vga_misc.cpp
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@ -207,12 +207,11 @@ static Bit8u read_p3cc(Bit32u port) {
static void write_hercules(Bit32u port,Bit8u val) {
Bit8u mask;
switch (port) {
case 0x3b8:
mask=0xff-0x80-0x2;;
if (vga.herc.enable_bits & 1) {
mask|=0x2;
vga.herc.mode_control=(vga.herc.mode_control & ~0x7d) | (val&0x7d);
if ((vga.herc.enable_bits & 1) && ((vga.herc.mode_control ^ val)&0x2)) {
vga.herc.mode_control^=0x2;
if (vga.mode != M_HERC || vga.mode != M_TEXT2) {
VGA_ATTR_SetPalette(1,0x07);
/* Force 0x3b4/5 registers */
@ -224,11 +223,10 @@ static void write_hercules(Bit32u port,Bit8u val) {
if (vga.mode != M_TEXT2) VGA_SetMode(M_TEXT2);
}
}
if (vga.herc.enable_bits & 0x2) {
mask|=0x80;
if ((vga.herc.enable_bits & 0x2) && ((vga.herc.mode_control ^ val)&0x80)) {
vga.herc.mode_control^=0x80;
VGA_SetupHandlers();
}
vga.herc.mode_control=(vga.herc.mode_control & ~mask) | (val&mask);
break;
case 0x3bf:
vga.herc.enable_bits=val;