diff options
Diffstat (limited to 'src/mame/drivers/model2.cpp')
-rw-r--r-- | src/mame/drivers/model2.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/mame/drivers/model2.cpp b/src/mame/drivers/model2.cpp index 55b8063b919..88c12b3b9d3 100644 --- a/src/mame/drivers/model2.cpp +++ b/src/mame/drivers/model2.cpp @@ -2417,7 +2417,7 @@ static MACHINE_CONFIG_START( model2o, model2_state ) MCFG_DEVICE_ADD("uart", I8251, 8000000) // uPD71051C, clock unknown MCFG_I8251_TXD_HANDLER(DEVWRITELINE("m1audio", segam1audio_device, write_txd)) - MCFG_CLOCK_ADD("uart_clock", M1AUDIO_TXRX_CLOCK) // unknown rate + MCFG_CLOCK_ADD("uart_clock", 500000) // 16 times 31.25MHz (standard Sega/MIDI sound data rate) MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("uart", i8251_device, write_txc)) MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("uart", i8251_device, write_rxc)) @@ -2476,7 +2476,7 @@ static MACHINE_CONFIG_START( model2a, model2_state ) MCFG_DEVICE_ADD("uart", I8251, 8000000) // uPD71051C, clock unknown - MCFG_CLOCK_ADD("uart_clock", M1AUDIO_TXRX_CLOCK) // unknown rate + MCFG_CLOCK_ADD("uart_clock", 500000) // 16 times 31.25MHz (standard Sega/MIDI sound data rate) MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("uart", i8251_device, write_txc)) MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("uart", i8251_device, write_rxc)) @@ -2608,7 +2608,7 @@ static MACHINE_CONFIG_START( model2b, model2_state ) MCFG_DEVICE_ADD("uart", I8251, 8000000) // uPD71051C, clock unknown - MCFG_CLOCK_ADD("uart_clock", M1AUDIO_TXRX_CLOCK) // unknown rate + MCFG_CLOCK_ADD("uart_clock", 500000) // 16 times 31.25MHz (standard Sega/MIDI sound data rate) MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("uart", i8251_device, write_txc)) MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("uart", i8251_device, write_rxc)) @@ -2698,7 +2698,7 @@ static MACHINE_CONFIG_START( model2c, model2_state ) MCFG_DEVICE_ADD("uart", I8251, 8000000) // uPD71051C, clock unknown - MCFG_CLOCK_ADD("uart_clock", M1AUDIO_TXRX_CLOCK) // unknown rate + MCFG_CLOCK_ADD("uart_clock", 500000) // 16 times 31.25MHz (standard Sega/MIDI sound data rate) MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("uart", i8251_device, write_txc)) MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("uart", i8251_device, write_rxc)) |