static WRITE_LINE_DEVICE_HANDLER(sordm5_video_interrupt_callback)
{
m5_state *driver_state = device->machine().driver_data<m5_state>();
if (state)
{
z80ctc_trg3_w(driver_state->m_ctc, 1);
z80ctc_trg3_w(driver_state->m_ctc, 0);
}
}
static void sordm5_video_interrupt_callback(running_machine &machine, int state)
{
m5_state *driver_state = machine.driver_data<m5_state>();
if (state)
{
z80ctc_trg3_w(driver_state->m_ctc, 1);
z80ctc_trg3_w(driver_state->m_ctc, 0);
}
}
static TIMER_DEVICE_CALLBACK( cassette_tick )
{
mtx_state *state = timer.machine().driver_data<mtx_state>();
int data = (cassette_input(state->m_cassette) > +0.0) ? 0 : 1;
z80ctc_trg3_w(state->m_z80ctc, data);
}
void trs80m2_state::machine_reset()
{
// clear keyboard interrupt
m_kbirq = 1;
z80ctc_trg3_w(m_ctc, m_kbirq);
m_kb->busy_w(m_kbirq);
// enable boot ROM
m_boot_rom = 1;
// disable video RAM
m_msel = 0;
}
void trs80m2_state::scan_keyboard()
{
if (!m_kbirq) return;
static const char *const keynames[] = { "ROW0", "ROW1", "ROW2", "ROW3", "ROW4", "ROW5", "ROW6", "ROW7", "ROW8" };
int table = 0, row, col;
if (ioport("ROW9")->read() & 0x07)
{
// shift, upper case
table = 1;
}
if (ioport("ROW9")->read() & 0x18)
{
// ctrl
table = 2;
}
// scan keyboard
for (row = 0; row < 9; row++)
{
UINT8 data = ioport(keynames[row])->read();
for (col = 0; col < 8; col++)
{
if (BIT(data, col))
{
// latch key data
m_key_data = trs80m2_keycodes[table][row][col];
// trigger keyboard interrupt
m_kbirq = 0;
z80ctc_trg3_w(m_ctc, m_kbirq);
return;
}
}
}
}
