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speedbsk: Set ppi tristate to prevent bogus write

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This commit is contained in:
Dirk Best 2021-10-17 10:26:47 +02:00
parent 944517f226
commit 036b19cf5b
1 changed files with 1 additions and 4 deletions
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5
src/mame/drivers/speedbsk.cpp
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@ -196,10 +196,6 @@ void speedbsk_state::ppi1_portc_w(uint8_t data)
// ------1- lcd rw
// -------0 lcd rs
// prevent bogus write at start
if (data == 0xff)
return;
m_lcd->rs_w(BIT(data, 0));
m_lcd->rw_w(BIT(data, 1));
m_lcd->e_w(BIT(data, 2));
@ -234,6 +230,7 @@ void speedbsk_state::speedbsk(machine_config &config)
I8255(config, m_ppi[1]);
// port a: output
m_ppi[1]->out_pb_callback().set(m_lcd, FUNC(hd44780_device::db_w));
m_ppi[1]->tri_pc_callback().set_constant(0);
m_ppi[1]->out_pc_callback().set(FUNC(speedbsk_state::ppi1_portc_w));
MSM6253(config, "adc", 0);