diff options
| -rw-r--r-- | hw/misc/mac_via.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c index 3c41d6263d..500ece5872 100644 --- a/hw/misc/mac_via.c +++ b/hw/misc/mac_via.c @@ -875,6 +875,15 @@ static void via1_auxmode_update(MOS6522Q800VIA1State *v1s) if (irq != oldirq) { trace_via1_auxmode(irq); qemu_set_irq(v1s->auxmode_irq, irq); + + /* + * Clear the ADB interrupt. MacOS can leave VIA1B_vADBInt asserted + * (low) if a poll sequence doesn't complete before NetBSD disables + * interrupts upon boot. Fortunately NetBSD switches to the so-called + * "A/UX" interrupt mode after it initialises, so we can use this as + * a convenient place to clear the ADB interrupt for now. + */ + s->b |= VIA1B_vADBInt; } } |