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(MESS) altos5: Use serial clocks from the CTC. (nw)

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This commit is contained in:
Curt Coder 2013-06-06 21:47:30 +00:00
parent 229475674c
commit 1e6aeb36a3
1 changed files with 13 additions and 1 deletions
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14
src/mess/drivers/altos5.c
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@ -40,6 +40,7 @@ public:
DECLARE_WRITE8_MEMBER(kbd_put);
DECLARE_READ8_MEMBER(port2e_r);
DECLARE_READ8_MEMBER(port2f_r);
TIMER_DEVICE_CALLBACK_MEMBER(ctc_tick);
DECLARE_WRITE_LINE_MEMBER(ctc_z1_w);
UINT8 m_port08;
UINT8 m_port09;
@ -208,6 +209,16 @@ static Z80DMA_INTERFACE( dma_intf )
};
// baud rate generator and RTC. All inputs are 2MHz.
TIMER_DEVICE_CALLBACK_MEMBER(altos5_state::ctc_tick)
{
m_ctc->trg0(1);
m_ctc->trg0(0);
m_ctc->trg1(1);
m_ctc->trg1(0);
m_ctc->trg2(1);
m_ctc->trg2(0);
}
WRITE_LINE_MEMBER( altos5_state::ctc_z1_w )
{
m_dart->rxca_w(state);
@ -278,7 +289,7 @@ static Z80DART_INTERFACE( dart_intf )
static Z80SIO_INTERFACE( sio_intf )
{
9600, 9600, 153600, 153600, // rxa, txa, rxb, txb clocks (from CTC)
0, 0, 0, 0,
// console#2
DEVCB_NULL, // ChA in data
@ -364,6 +375,7 @@ static MACHINE_CONFIG_START( altos5, altos5_state )
MCFG_Z80DART_ADD("z80dart", XTAL_8MHz / 2, dart_intf )
MCFG_Z80SIO0_ADD("z80sio", XTAL_8MHz / 2, sio_intf )
MCFG_RS232_PORT_ADD("rs232", rs232_intf, default_rs232_devices, "serial_terminal")
MCFG_TIMER_DRIVER_ADD_PERIODIC("ctc_tick", altos5_state, ctc_tick, attotime::from_hz(XTAL_8MHz / 4))
MACHINE_CONFIG_END