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vt52: fix for vt52 -eia sunkbd "Input ports cannot be read at init time!"

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This commit is contained in:
Robbbert 2021-02-11 03:01:14 +11:00
parent 8b2f872399
commit 8b893af5dd
1 changed files with 10 additions and 3 deletions
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13
src/mame/drivers/vt52.cpp
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@ -43,6 +43,7 @@ public:
, m_serial_out(true)
, m_rec_data(true)
, m_110_baud_counter(0)
, m_ready_for_input(false)
{
}
@ -83,6 +84,7 @@ private:
bool m_serial_out;
bool m_rec_data;
u8 m_110_baud_counter;
bool m_ready_for_input;
};
void vt52_state::machine_start()
@ -90,11 +92,13 @@ void vt52_state::machine_start()
save_item(NAME(m_serial_out));
save_item(NAME(m_rec_data));
save_item(NAME(m_110_baud_counter));
save_item(NAME(m_ready_for_input));
}
void vt52_state::machine_reset()
{
m_110_baud_counter = 0;
m_ready_for_input = true;
update_serial_settings();
m_uart->write_swe(0);
@ -224,9 +228,12 @@ WRITE_LINE_MEMBER(vt52_state::rec_data_w)
{
m_rec_data = state;
ioport_value baud = m_baud_sw->read();
if (BIT(baud, 9) && ((~baud & 0x0880) == 0 || (m_serial_out && m_break_key->read())))
m_uart->write_si(state);
if (m_ready_for_input)
{
ioport_value baud = m_baud_sw->read();
if (BIT(baud, 9) && ((~baud & 0x0880) == 0 || (m_serial_out && m_break_key->read())))
m_uart->write_si(state);
}
}
READ_LINE_MEMBER(vt52_state::xrdy_eoc_r)