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-rw-r--r--src/mame/drivers/system1.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/system1.cpp b/src/mame/drivers/system1.cpp
index b970cf7f7e6..58cb939e2e0 100644
--- a/src/mame/drivers/system1.cpp
+++ b/src/mame/drivers/system1.cpp
@@ -2173,7 +2173,7 @@ void system1_state::sys1ppi(machine_config &config)
TIMER(config, "soundirq", 0).configure_scanline(FUNC(system1_state::soundirq_gen), "screen", 32, 64);
- config.m_minimum_quantum = attotime::from_hz(6000);
+ config.set_maximum_quantum(attotime::from_hz(6000));
I8255A(config, m_ppi8255);
m_ppi8255->out_pa_callback().set(FUNC(system1_state::soundport_w));