diff options
Diffstat (limited to 'src/mame/drivers/systec.cpp')
-rw-r--r-- | src/mame/drivers/systec.cpp | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/src/mame/drivers/systec.cpp b/src/mame/drivers/systec.cpp index 5cf5599b301..39df25fa399 100644 --- a/src/mame/drivers/systec.cpp +++ b/src/mame/drivers/systec.cpp @@ -46,15 +46,11 @@ public: systec_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") - , m_sio(*this, "sio") { } - DECLARE_WRITE_LINE_MEMBER(clock_tick); - private: - required_device<cpu_device> m_maincpu; - required_device<z80sio_device> m_sio; virtual void machine_reset() override; + required_device<cpu_device> m_maincpu; }; static ADDRESS_MAP_START(systec_mem, AS_PROGRAM, 8, systec_state) @@ -80,12 +76,6 @@ void systec_state::machine_reset() memcpy(m_p_maincpu, m_p_roms, 0x2000); } -// source of baud frequency is unknown, so we invent a clock -WRITE_LINE_MEMBER( systec_state::clock_tick ) -{ - m_sio->txca_w(state); - m_sio->rxca_w(state); -} static MACHINE_CONFIG_START( systec ) /* basic machine hardware */ @@ -94,7 +84,8 @@ static MACHINE_CONFIG_START( systec ) MCFG_CPU_IO_MAP(systec_io) MCFG_DEVICE_ADD("uart_clock", CLOCK, 153600) - MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(systec_state, clock_tick)) + MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("sio", z80sio_device, txca_w)) + MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("sio", z80sio_device, rxca_w)) /* Devices */ MCFG_Z80SIO_ADD("sio", XTAL_4MHz, 0, 0, 0, 0) |