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Ported the AT keyboard reset fixes from feature/machine_and_kb.

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This commit is contained in:
OBattler
2021-11-21 18:17:45 +01:00
parent db8b7dc896
commit 0c307c2058
1 changed files with 19 additions and 9 deletions
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28
src/device/keyboard_at.c
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@@ -1052,38 +1052,48 @@ static void
write_output(atkbd_t *dev, uint8_t val)
{
uint8_t kbc_ven = dev->flags & KBC_VEN_MASK;
uint8_t old = dev->output_port;
kbd_log("ATkbc: write output port: %02X (old: %02X)\n", val, dev->output_port);
if ((kbc_ven == KBC_VEN_AMI) || ((dev->flags & KBC_TYPE_MASK) < KBC_TYPE_PS2_NOREF))
val |= ((dev->mem[0] << 4) & 0x10);
if ((dev->output_port ^ val) & 0x20) { /*IRQ 12*/
/*IRQ 12*/
if ((dev->output_port ^ val) & 0x20) {
if (val & 0x20)
picint(1 << 12);
else
picintc(1 << 12);
}
if ((dev->output_port ^ val) & 0x10) { /*IRQ 1*/
/*IRQ 1*/
if ((dev->output_port ^ val) & 0x10) {
if (val & 0x10)
picint(1 << 1);
else
picintc(1 << 1);
}
if ((dev->output_port ^ val) & 0x02) { /*A20 enable change*/
mem_a20_key = val & 0x02;
mem_a20_recalc();
flushmmucache();
}
if ((dev->output_port ^ val) & 0x01) { /*Reset*/
if (! (val & 0x01)) {
/* Do this here to avoid an infinite reset loop. */
dev->output_port = val;
/* 0 holds the CPU in the RESET state, 1 releases it. To simplify this,
we just do everything on release. */
if ((val & 0x01) && !(old & 0x01)) {
if (val & 0x01) {
/* Pin 0 selected. */
softresetx86(); /*Pulse reset!*/
pclog("write_output(): Pulse reset!\n");
softresetx86(); /*Pulse reset!*/
cpu_set_edx();
smbase = is_am486dxl ? 0x00060000 : 0x00030000;
flushmmucache();
}
}
/* Mask off the A20 stuff because we use mem_a20_key directly for that. */
dev->output_port = val;
}
@@ -1372,7 +1382,7 @@ write64_ami(void *priv, uint8_t val)
case 0xa1: /* get controller version */
kbd_log("ATkbc: AMI - get controller version\n");
add_data(dev, 'H');
add_data(dev, 'Z');
return 0;
case 0xa2: /* clear keyboard controller lines P22/P23 */