INLINE int noise(pleiads_sound_state *state, int samplerate)
{
int c_pa6_level = update_c_pa6(state, samplerate);
int sum = 0;
/*
* bit 4 of latch A: noise counter rate modulation?
* CV2 input of lower 556 is connected via 2k resistor
*/
if ( state->m_sound_latch_a & 0x10 )
state->m_noise.counter -= state->m_noise.freq * 2 / 3; /* ????? */
else
state->m_noise.counter -= state->m_noise.freq * 1 / 3; /* ????? */
if( state->m_noise.counter <= 0 )
{
int n = (-state->m_noise.counter / samplerate) + 1;
state->m_noise.counter += n * samplerate;
state->m_noise.polyoffs = (state->m_noise.polyoffs + n) & 0x3ffff;
state->m_polybit = (state->m_poly18[state->m_noise.polyoffs>>5] >> (state->m_noise.polyoffs & 31)) & 1;
}
inline int pleiads_sound_device::noise(int samplerate)
{
int c_pa6_level = update_c_pa6(samplerate);
int sum = 0;
/*
* bit 4 of latch A: noise counter rate modulation?
* CV2 input of lower 556 is connected via 2k resistor
*/
if ( m_sound_latch_a & 0x10 )
m_noise.counter -= m_noise.freq * 2 / 3; /* ????? */
else
m_noise.counter -= m_noise.freq * 1 / 3; /* ????? */
if( m_noise.counter <= 0 )
{
int n = (-m_noise.counter / samplerate) + 1;
m_noise.counter += n * samplerate;
m_noise.polyoffs = (m_noise.polyoffs + n) & 0x3ffff;
m_polybit = (m_poly18[m_noise.polyoffs>>5] >> (m_noise.polyoffs & 31)) & 1;
}
INLINE int noise(int samplerate)
{
static int counter, polyoffs;
int c_pa6_level = update_c_pa6(samplerate);
int sum = 0;
/*
* bit 4 of latch A: noise counter rate modulation?
* CV2 input of lower 556 is connected via 2k resistor
*/
if ( sound_latch_a & 0x10 )
counter -= noise_freq * 2 / 3; /* ????? */
else
counter -= noise_freq * 1 / 3; /* ????? */
if( counter <= 0 )
{
int n = (-counter / samplerate) + 1;
counter += n * samplerate;
polyoffs = (polyoffs + n) & 0x3ffff;
polybit = (poly18[polyoffs>>5] >> (polyoffs & 31)) & 1;
}
