Reads and writes to the TL and TC registers have no immediate effect on a running timer, with the exception of a write to TCH. Hence these mos6522_timer_update() calls are not needed.
Signed-off-by: Finn Thain <[email protected]> --- hw/misc/mos6522.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/hw/misc/mos6522.c b/hw/misc/mos6522.c index ff246b5437..1d4a56077e 100644 --- a/hw/misc/mos6522.c +++ b/hw/misc/mos6522.c @@ -234,7 +234,6 @@ uint64_t mos6522_read(void *opaque, hwaddr addr, unsigned size) val = s->timers[0].latch & 0xff; break; case VIA_REG_T1LH: - /* XXX: check this */ val = (s->timers[0].latch >> 8) & 0xff; break; case VIA_REG_T2CL: @@ -303,8 +302,6 @@ void mos6522_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) break; case VIA_REG_T1CL: s->timers[0].latch = (s->timers[0].latch & 0xff00) | val; - mos6522_timer1_update(s, &s->timers[0], - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); break; case VIA_REG_T1CH: s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8); @@ -313,14 +310,10 @@ void mos6522_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) break; case VIA_REG_T1LL: s->timers[0].latch = (s->timers[0].latch & 0xff00) | val; - mos6522_timer1_update(s, &s->timers[0], - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); break; case VIA_REG_T1LH: s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8); s->ifr &= ~T1_INT; - mos6522_timer1_update(s, &s->timers[0], - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); break; case VIA_REG_T2CL: s->timers[1].latch = (s->timers[1].latch & 0xff00) | val; -- 2.26.3
