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-rw-r--r--src/mame/drivers/tasc.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/tasc.cpp b/src/mame/drivers/tasc.cpp
index 186ea53d7be..c451ebeea1c 100644
--- a/src/mame/drivers/tasc.cpp
+++ b/src/mame/drivers/tasc.cpp
@@ -213,7 +213,7 @@ void tasc_state::tasc(machine_config &config)
ARM(config, m_maincpu, 30_MHz_XTAL);
m_maincpu->set_addrmap(AS_PROGRAM, &tasc_state::main_map);
m_maincpu->set_copro_type(arm_cpu_device::copro_type::VL86C020);
- m_maincpu->set_periodic_int(FUNC(tasc_state::irq1_line_hold), attotime::from_hz(256));
+ m_maincpu->set_periodic_int(FUNC(tasc_state::irq1_line_hold), attotime::from_hz(32.768_kHz_XTAL/128)); // 256Hz
TIMER(config, "disable_bootrom").configure_generic(FUNC(tasc_state::disable_bootrom));