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dsb46: Use CTC for baud rate generation (nw)

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This commit is contained in:
AJR 2017-11-06 11:52:42 -05:00
parent 412a9b4783
commit 61b1748559
1 changed files with 11 additions and 7 deletions
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18
src/mame/drivers/dsb46.cpp
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@ -65,7 +65,7 @@ static ADDRESS_MAP_START( dsb46_io, AS_IO, 8, dsb46_state )
AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE("ctc1", z80ctc_device, read, write)
AM_RANGE(0x1a, 0x1a) AM_WRITE(port1a_w)
//AM_RANGE(0x10, 0x10) disk related
//AM_RANGE(0x14, 0x14) ??
//AM_RANGE(0x14, 0x14) ?? (read after CTC1 TRG3)
//AM_RANGE(0x18, 0x18) ??
//AM_RANGE(0x1c, 0x1c) disk data
//AM_RANGE(0x1d, 0x1d) disk status (FF = no fdc)
@ -104,7 +104,7 @@ static const z80_daisy_config daisy_chain[] =
static MACHINE_CONFIG_START( dsb46 )
// basic machine hardware
MCFG_CPU_ADD("maincpu", Z80, 4000000)
MCFG_CPU_ADD("maincpu", Z80, XTAL_24MHz / 6)
MCFG_CPU_PROGRAM_MAP(dsb46_mem)
MCFG_CPU_IO_MAP(dsb46_io)
MCFG_Z80_DAISY_CHAIN(daisy_chain)
@ -112,12 +112,12 @@ static MACHINE_CONFIG_START( dsb46 )
MCFG_MACHINE_RESET_OVERRIDE(dsb46_state, dsb46)
/* video hardware */
MCFG_DEVICE_ADD("uart_clock", CLOCK, 153600)
MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("sio", z80sio_device, txca_w))
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("sio", z80sio_device, rxca_w))
MCFG_DEVICE_ADD("ctc_clock", CLOCK, XTAL_1_8432MHz)
MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("ctc1", z80ctc_device, trg0))
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("ctc1", z80ctc_device, trg2))
/* Devices */
MCFG_DEVICE_ADD("sio", Z80SIO, XTAL_4MHz)
MCFG_DEVICE_ADD("sio", Z80SIO, XTAL_24MHz / 6)
MCFG_Z80SIO_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
MCFG_Z80SIO_OUT_TXDA_CB(DEVWRITELINE("rs232", rs232_port_device, write_txd))
MCFG_Z80SIO_OUT_DTRA_CB(DEVWRITELINE("rs232", rs232_port_device, write_dtr))
@ -127,8 +127,12 @@ static MACHINE_CONFIG_START( dsb46 )
MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sio", z80sio_device, rxa_w))
MCFG_RS232_CTS_HANDLER(DEVWRITELINE("sio", z80sio_device, ctsa_w))
MCFG_DEVICE_ADD("ctc1", Z80CTC, XTAL_4MHz)
MCFG_DEVICE_ADD("ctc1", Z80CTC, XTAL_24MHz / 6)
MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
MCFG_Z80CTC_ZC0_CB(DEVWRITELINE("sio", z80sio_device, rxca_w))
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("sio", z80sio_device, txca_w))
MCFG_Z80CTC_ZC2_CB(DEVWRITELINE("sio", z80sio_device, rxcb_w))
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("sio", z80sio_device, txcb_w))
MACHINE_CONFIG_END
ROM_START( dsb46 )