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-rw-r--r--src/mame/drivers/cmi.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/cmi.cpp b/src/mame/drivers/cmi.cpp
index 1469cd70a0c..675ad420f95 100644
--- a/src/mame/drivers/cmi.cpp
+++ b/src/mame/drivers/cmi.cpp
@@ -2809,7 +2809,7 @@ MACHINE_CONFIG_START(cmi_state::cmi2x)
MCFG_PIA_IRQB_HANDLER(WRITELINE(cmi_state, pia_q219_irqb))
MCFG_DEVICE_ADD("q219_ptm", PTM6840, 2000000) // ptm_q219_config
- MCFG_PTM6840_EXTERNAL_CLOCKS(HBLANK_FREQ, VBLANK_FREQ, 1000000)
+ MCFG_PTM6840_EXTERNAL_CLOCKS(HBLANK_FREQ.dvalue(), VBLANK_FREQ.dvalue(), 1'000'000) // TODO: does the third thing come from a crystal?
MCFG_PTM6840_IRQ_CB(WRITELINE(cmi_state, ptm_q219_irq))
MCFG_DEVICE_ADD("cmi02_pia_1", PIA6821, 0) // pia_cmi02_1_config