//-------------------------------------------------
// set_latch_written - helper to signal that latch
// has been written or has been read
//-------------------------------------------------
protected void set_latch_written(bool latch_written)
{
if (m_latch_written != latch_written)
{
m_latch_written = latch_written;
m_data_pending_cb.op(latch_written ? 1 : 0);
}
}
protected override void device_reset()
{
inst_state = STATE_RESET;
inst_substate = 0;
inst_state_base = 0;
nmi_state = false;
irq_state = false;
apu_irq_state = false;
irq_taken = false;
v_state = false;
sync = false;
sync_w.op(CLEAR_LINE);
inhibit_interrupts = false;
}
void set_hreq(int state)
{
LOG("{0}\n", "set_hreq");
if (m_hreq != state)
{
m_out_hrq_cb.op(state);
m_hreq = state;
}
}
void set_tc(int state)
{
LOG("{0}: {1}\n", "set_tc", state);
if (m_tc != (state != 0))
{
m_out_tc_cb.op(state);
m_tc = state != 0;
}
}
// timer callback at VCK low edge on MSM5205 (at rising edge on MSM6585)
void update_adpcm()
{
int val;
int new_signal;
// callback user handler and latch next data
if (!m_vck_legacy_cb.isnull())
{
m_vck_legacy_cb.op(1);
}
// reset check at last hiedge of VCK
if (m_reset)
{
new_signal = 0;
m_step = 0;
}
else
{
/* update signal */
/* !! MSM5205 has internal 12bit decoding, signal width is 0 to 8191 !! */
val = m_data;
new_signal = m_signal + m_diff_lookup[m_step * 16 + (val & 15)];
if (new_signal > 2047)
{
new_signal = 2047;
}
else if (new_signal < -2048)
{
new_signal = -2048;
}
m_step += index_shift[val & 7];
if (m_step > 48)
{
m_step = 48;
}
else if (m_step < 0)
{
m_step = 0;
}
}
/* update when signal changed */
if (m_signal != new_signal)
{
m_stream.update();
m_signal = new_signal;
}
}
protected override void device_timer(emu_timer timer, device_timer_id id, int param, object ptr)
{
switch (id)
{
case TIMER_VCK:
m_vck = !m_vck;
m_vck_cb.op(m_vck ? 1 : 0);
if (!m_vck)
{
m_capture_timer.adjust(attotime.from_nsec(15600));
}
break;
case TIMER_ADPCM_CAPTURE:
update_adpcm();
break;
}
}
/*
* if change_pc() direccted these areas ,Call hd63701_trap_pc().
* 'mode' is selected by the sense of p2.0,p2.1,and p2.3 at reset timming.
* mode 0,1,2,4,6 : $0000-$001f
* mode 5 : $0000-$001f,$0200-$efff
* mode 7 : $0000-$001f,$0100-$efff
*/
void set_os3(int state)
{
LOG("OS3: {0}\n", state);
m_out_sc2_func.op(state);
}