static void spacefev_update_SN76477_status( device_t *sn )
{
n8080_state *state = sn->machine().driver_data<n8080_state>();
double dblR0 = RES_M(1.0);
double dblR1 = RES_M(1.5);
if (!state->m_mono_flop[0])
{
dblR0 = 1 / (1 / RES_K(150) + 1 / dblR0); /* ? */
}
if (!state->m_mono_flop[1])
{
dblR1 = 1 / (1 / RES_K(620) + 1 / dblR1); /* ? */
}
sn76477_decay_res_w(sn, dblR0);
sn76477_vco_res_w(sn, dblR1);
sn76477_enable_w(sn,
!state->m_mono_flop[0] &&
!state->m_mono_flop[1] &&
!state->m_mono_flop[2]);
sn76477_vco_w(sn, state->m_mono_flop[1]);
sn76477_mixer_b_w(sn, state->m_mono_flop[0]);
}
static void sheriff_update_SN76477_status( device_t *sn )
{
n8080_state *state = sn->machine().driver_data<n8080_state>();
if (state->m_mono_flop[1])
{
sn76477_vco_voltage_w(sn, 5);
}
else
{
sn76477_vco_voltage_w(sn, 0);
}
sn76477_enable_w(sn,
!state->m_mono_flop[0] &&
!state->m_mono_flop[1]);
sn76477_vco_w(sn, state->m_mono_flop[0]);
sn76477_mixer_b_w(sn, !state->m_mono_flop[0]);
}
void crbaloon_audio_set_appear_enable(device_t *sn, int enabled)
{
/* APPEAR is connected to MIXER B */
sn76477_mixer_b_w(sn, enabled);
}