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Diffstat (limited to 'src/devices/machine/clock.cpp')
-rw-r--r--src/devices/machine/clock.cpp47
1 files changed, 12 insertions, 35 deletions
diff --git a/src/devices/machine/clock.cpp b/src/devices/machine/clock.cpp
index 927a0aecbf5..374dc8a16a8 100644
--- a/src/devices/machine/clock.cpp
+++ b/src/devices/machine/clock.cpp
@@ -22,48 +22,25 @@ void clock_device::device_start()
void clock_device::device_clock_changed()
{
- update_timer();
-}
-
-attotime clock_device::period()
-{
- if (m_clock > 0)
- return attotime::from_hz(m_clock * 2);
-
- return attotime::never;
-}
-
-void clock_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
-{
- m_signal = !m_signal;
- m_signal_handler(m_signal);
-
- m_timer->adjust(period());
-}
-
-void clock_device::update_timer()
-{
if (!m_signal_handler.isnull() && m_clock > 0)
{
if (m_timer == nullptr)
- {
m_timer = timer_alloc(0);
- m_timer->adjust(period());
- }
- else
- {
- attotime next = period() - m_timer->elapsed();
- if (next < attotime::zero)
- {
- next = attotime::zero;
- }
+ const attotime period(attotime::from_hz(m_clock * 2));
+
+ attotime next = period - m_timer->elapsed();
+ if (next < attotime::zero)
+ next = attotime::zero;
- m_timer->adjust(next);
- }
+ m_timer->adjust(next, 0, period);
}
else if (m_timer != nullptr)
- {
m_timer->adjust(attotime::never);
- }
+}
+
+void clock_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+{
+ m_signal = !m_signal;
+ m_signal_handler(m_signal);
}