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4004clk.c: reduce tagmap lookups (nw)

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This commit is contained in:
Wilbert Pol 2015-08-02 12:47:33 +02:00
parent 885a8f050c
commit d92a914cd7
1 changed files with 4 additions and 2 deletions
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6
src/mess/drivers/4004clk.c
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@ -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)