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Diffstat (limited to 'src/mame/drivers/zsbc3.cpp')
-rw-r--r--src/mame/drivers/zsbc3.cpp14
1 files changed, 2 insertions, 12 deletions
diff --git a/src/mame/drivers/zsbc3.cpp b/src/mame/drivers/zsbc3.cpp
index 3060d52c07e..7190a109203 100644
--- a/src/mame/drivers/zsbc3.cpp
+++ b/src/mame/drivers/zsbc3.cpp
@@ -48,15 +48,11 @@ public:
zsbc3_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:
virtual void machine_reset() override;
required_device<cpu_device> m_maincpu;
- required_device<z80sio_device> m_sio;
};
@@ -84,13 +80,6 @@ void zsbc3_state::machine_reset()
{
}
-// source of baud frequency is unknown, so we invent a clock
-WRITE_LINE_MEMBER( zsbc3_state::clock_tick )
-{
- m_sio->txca_w(state);
- m_sio->rxca_w(state);
-}
-
static MACHINE_CONFIG_START( zsbc3 )
/* basic machine hardware */
@@ -100,7 +89,8 @@ static MACHINE_CONFIG_START( zsbc3 )
/* video hardware */
MCFG_DEVICE_ADD("uart_clock", CLOCK, 153600)
- MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(zsbc3_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_16MHz / 4, 0, 0, 0, 0)