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MT06960 fix

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This commit is contained in:
AJR 2018-05-05 09:30:19 -04:00
parent ac59132f33
commit 916e4663a3
1 changed files with 18 additions and 3 deletions
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21
src/mame/drivers/qtsbc.cpp
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@ -46,11 +46,13 @@ public:
, m_maincpu(*this, "maincpu")
, m_pit(*this, "pit")
, m_usart(*this, "usart")
, m_rs232(*this, "rs232")
, m_dsw(*this, "DSW%u", 1)
, m_jumpers(*this, "JUMPERS")
, m_cpu_speed(*this, "SPEED")
, m_eprom(*this, "maincpu")
, m_p_ram(*this, "ram")
, m_rts(true)
{ }
void qtsbc(machine_config &config);
@ -61,18 +63,21 @@ private:
DECLARE_WRITE8_MEMBER(memory_w);
DECLARE_READ8_MEMBER(io_r);
DECLARE_WRITE8_MEMBER(io_w);
DECLARE_WRITE_LINE_MEMBER(rts_loopback_w);
virtual void machine_start() override;
virtual void machine_reset() override;
required_device<cpu_device> m_maincpu;
required_device<pit8253_device> m_pit;
required_device<i8251_device> m_usart;
required_device<rs232_port_device> m_rs232;
required_ioport_array<3> m_dsw;
required_ioport m_jumpers;
required_ioport m_cpu_speed;
required_region_ptr<u8> m_eprom;
required_shared_ptr<u8> m_p_ram;
bool m_power_on;
bool m_rts;
};
@ -200,6 +205,16 @@ WRITE8_MEMBER(qtsbc_state::io_w)
}
}
WRITE_LINE_MEMBER(qtsbc_state::rts_loopback_w)
{
// Filtered through this routine to avoid infinite loops
if (state != bool(m_rts))
{
m_rts = state;
m_rs232->write_rts(m_rts);
}
}
void qtsbc_state::mem_map(address_map &map)
{
map.unmap_value_high();
@ -440,9 +455,10 @@ INPUT_PORTS_END
void qtsbc_state::machine_start()
{
subdevice<i8251_device>("usart")->write_cts(0);
m_usart->write_cts(0);
save_item(NAME(m_power_on));
save_item(NAME(m_rts));
}
void qtsbc_state::machine_reset()
@ -476,12 +492,11 @@ MACHINE_CONFIG_START(qtsbc_state::qtsbc)
MCFG_DEVICE_ADD("usart", I8251, 0) // U8
MCFG_I8251_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd))
MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts))
MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal")
MCFG_RS232_RXD_HANDLER(DEVWRITELINE("usart", i8251_device, write_rxd))
MCFG_RS232_DSR_HANDLER(DEVWRITELINE("usart", i8251_device, write_dsr)) // actually from pin 11, "Reverse Channel Transmit"
MCFG_RS232_CTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts))
MCFG_RS232_CTS_HANDLER(WRITELINE(qtsbc_state, rts_loopback_w))
MCFG_RS232_DCD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_dtr))
MCFG_SLOT_OPTION_DEVICE_INPUT_DEFAULTS("terminal", terminal) // must be exactly here
MACHINE_CONFIG_END