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-rw-r--r--src/mame/drivers/taito_x.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/taito_x.cpp b/src/mame/drivers/taito_x.cpp
index 45206f523c2..1bd310c9400 100644
--- a/src/mame/drivers/taito_x.cpp
+++ b/src/mame/drivers/taito_x.cpp
@@ -831,7 +831,7 @@ MACHINE_CONFIG_START(taitox_state::superman)
MCFG_CPU_ADD("audiocpu", Z80, XTAL(16'000'000)/4) /* verified on pcb */
MCFG_CPU_PROGRAM_MAP(sound_map)
- MCFG_TAITO_CCHIP_ADD("cchip", XTAL(16'000'000)/2) /* 8MHz? */
+ MCFG_TAITO_CCHIP_ADD("cchip", XTAL(16'000'000)/2) /* 8MHz measured on pin 20 */
MCFG_CCHIP_IN_PORTA_CB(IOPORT("IN0"))
MCFG_CCHIP_IN_PORTB_CB(IOPORT("IN1"))
MCFG_CCHIP_IN_PORTAD_CB(IOPORT("IN2"))