diff options
Diffstat (limited to 'hw/misc/mac_via.c')
| -rw-r--r-- | hw/misc/mac_via.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c index 7a53a8b4c0..b378e6b305 100644 --- a/hw/misc/mac_via.c +++ b/hw/misc/mac_via.c @@ -880,6 +880,21 @@ static void via1_adb_update(MOS6522Q800VIA1State *v1s) } } +static void via1_auxmode_update(MOS6522Q800VIA1State *v1s) +{ + MOS6522State *s = MOS6522(v1s); + int oldirq, irq; + + oldirq = (v1s->last_b & VIA1B_vMystery) ? 1 : 0; + irq = (s->b & VIA1B_vMystery) ? 1 : 0; + + /* Check to see if the A/UX mode bit has changed */ + if (irq != oldirq) { + trace_via1_auxmode(irq); + qemu_set_irq(v1s->auxmode_irq, irq); + } +} + static uint64_t mos6522_q800_via1_read(void *opaque, hwaddr addr, unsigned size) { MOS6522Q800VIA1State *s = MOS6522_Q800_VIA1(opaque); @@ -902,6 +917,7 @@ static void mos6522_q800_via1_write(void *opaque, hwaddr addr, uint64_t val, case VIA_REG_B: via1_rtc_update(v1s); via1_adb_update(v1s); + via1_auxmode_update(v1s); v1s->last_b = ms->b; break; @@ -1046,6 +1062,9 @@ static void mos6522_q800_via1_init(Object *obj) TYPE_ADB_BUS, DEVICE(v1s), "adb.0"); qdev_init_gpio_in(DEVICE(obj), via1_irq_request, VIA1_IRQ_NB); + + /* A/UX mode */ + qdev_init_gpio_out(DEVICE(obj), &v1s->auxmode_irq, 1); } static const VMStateDescription vmstate_q800_via1 = { |