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A20 line fix by Greatpsycho.

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This commit is contained in:
OBattler
2017-07-17 14:22:02 +02:00
parent e7c0312abd
commit d3baa03d05
5 changed files with 13 additions and 5 deletions
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13
src/mem.c
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@@ -2316,16 +2316,19 @@ static uint8_t port_92_read(uint16_t port, void *priv)
static void port_92_write(uint16_t port, uint8_t val, void *priv)
{
if (val & 1)
if ((mem_a20_alt ^ val) & 2)
{
mem_a20_alt = val & 2;
mem_a20_recalc();
}
if ((~port_92_reg & val) & 1)
{
softresetx86();
cpu_set_edx();
}
port_92_reg = val & ~-1;
mem_a20_alt = val & 2;
mem_a20_recalc();
port_92_reg = val;
}
void port_92_clear_reset()