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added simple display output

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This commit is contained in:
hap 2015-02-08 17:17:52 +01:00
parent 713a4de6e8
commit 881345d294
1 changed files with 30 additions and 0 deletions
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30
src/mess/drivers/tmtennis.c
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@ -45,11 +45,35 @@ public:
DECLARE_WRITE8_MEMBER(plate_w);
DECLARE_WRITE8_MEMBER(grid_w);
UINT16 m_vfd_state[0x10];
void update_vfd();
virtual void machine_start();
};
/***************************************************************************
Display
***************************************************************************/
void tmtennis_state::update_vfd()
{
for (int i = 0; i < 12; i++)
if (m_grid & (1 << i) && m_vfd_state[i] != m_plate)
{
// on difference, send to output
for (int j = 0; j < 12; j++)
output_set_lamp_value(i*100 + j, m_plate >> j & 1);
m_vfd_state[i] = m_plate;
}
}
/***************************************************************************
I/O
@ -84,6 +108,8 @@ WRITE8_MEMBER(tmtennis_state::plate_w)
if (offset == NEC_UCOM4_PORTF) offset--;
int shift = (offset - NEC_UCOM4_PORTC) * 4;
m_plate = (m_plate & ~(0xf << shift)) | (data << shift);
update_vfd();
}
WRITE8_MEMBER(tmtennis_state::grid_w)
@ -91,6 +117,8 @@ WRITE8_MEMBER(tmtennis_state::grid_w)
// port G/H/I: vfd matrix grid
int shift = (offset - NEC_UCOM4_PORTG) * 4;
m_grid = (m_grid & ~(0xf << shift)) | (data << shift);
update_vfd();
}
@ -133,11 +161,13 @@ INPUT_PORTS_END
void tmtennis_state::machine_start()
{
// zerofill
memset(m_vfd_state, 0, sizeof(m_vfd_state));
m_input_mux = 0;
m_plate = 0;
m_grid = 0;
// register for savestates
save_item(NAME(m_vfd_state));
save_item(NAME(m_input_mux));
save_item(NAME(m_plate));
save_item(NAME(m_grid));