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808x fixes - 8088mph works normally again.

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This commit is contained in:
OBattler
2020-11-28 07:02:38 +01:00
parent 1df797dfda
commit f9c2f04a52
1 changed files with 15 additions and 7 deletions
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22
src/cpu/808x.c
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@@ -279,7 +279,7 @@ resub_cycles(int old_cycles)
if (old_cycles > cycles) { if (old_cycles > cycles) {
cyc_diff = old_cycles - cycles; cyc_diff = old_cycles - cycles;
cycles = old_cycles; cycles = old_cycles;
resub_cycles(cyc_diff); sub_cycles(cyc_diff);
} }
} }
@@ -298,27 +298,35 @@ cpu_io(int bits, int out, uint16_t port)
if (out) { if (out) {
wait(4, 1); wait(4, 1);
if (bits == 16) { if (bits == 16) {
if (is8086 && !(port & 1)) if (is8086 && !(port & 1)) {
old_cycles = cycles;
outw(port, AX); outw(port, AX);
else { } else {
wait(4, 1); wait(4, 1);
old_cycles = cycles;
outb(port++, AL); outb(port++, AL);
outb(port, AH); outb(port, AH);
} }
} else } else {
old_cycles = cycles;
outb(port, AL); outb(port, AL);
}
} else { } else {
wait(4, 1); wait(4, 1);
if (bits == 16) { if (bits == 16) {
if (is8086 && !(port & 1)) if (is8086 && !(port & 1)) {
old_cycles = cycles;
AX = inw(port); AX = inw(port);
else { } else {
wait(4, 1); wait(4, 1);
old_cycles = cycles;
AL = inb(port++); AL = inb(port++);
AH = inb(port); AH = inb(port);
} }
} else } else {
old_cycles = cycles;
AL = inb(port); AL = inb(port);
}
} }
resub_cycles(old_cycles); resub_cycles(old_cycles);