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Diffstat (limited to 'src/mess/drivers/4004clk.c')
-rw-r--r--src/mess/drivers/4004clk.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/mess/drivers/4004clk.c b/src/mess/drivers/4004clk.c
index 7f3cb36a90b..631690d582d 100644
--- a/src/mess/drivers/4004clk.c
+++ b/src/mess/drivers/4004clk.c
@@ -19,11 +19,13 @@ public:
nixieclock_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
- m_dac(*this, "dac")
+ m_dac(*this, "dac"),
+ m_input(*this, "INPUT")
{ }
required_device<i4004_cpu_device> m_maincpu;
required_device<dac_device> m_dac;
+ required_ioport m_input;
DECLARE_READ8_MEMBER( data_r );
DECLARE_WRITE8_MEMBER( nixie_w );
DECLARE_WRITE8_MEMBER( neon_w );
@@ -39,7 +41,7 @@ public:
READ8_MEMBER(nixieclock_state::data_r)
{
- return ioport("INPUT")->read() & 0x0f;
+ return m_input->read() & 0x0f;
}
UINT8 nixieclock_state::nixie_to_num(UINT16 val)