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Diffstat (limited to 'src/mame/audio/pleiads.cpp')
-rw-r--r-- | src/mame/audio/pleiads.cpp | 745 |
1 files changed, 745 insertions, 0 deletions
diff --git a/src/mame/audio/pleiads.cpp b/src/mame/audio/pleiads.cpp new file mode 100644 index 00000000000..19c5d694774 --- /dev/null +++ b/src/mame/audio/pleiads.cpp @@ -0,0 +1,745 @@ +// license:GPL-2.0+ +// copyright-holders:Juergen Buchmueller +/**************************************************************************** + * + * Sound hardware for Pleiades, Naughty Boy and Pop Flamer. + * + * If you find errors or have suggestions, please mail me. + * Juergen Buchmueller <pullmoll@t-online.de> + * + ****************************************************************************/ +#include "emu.h" +#include "audio/pleiads.h" + +#define VMIN 0 +#define VMAX 32767 + +/* fixed 8kHz clock */ +#define TONE1_CLOCK 8000 + + +const device_type PLEIADS = &device_creator<pleiads_sound_device>; + +pleiads_sound_device::pleiads_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, PLEIADS, "Pleiads Audio Custom", tag, owner, clock, "pleiads_sound", __FILE__), + device_sound_interface(mconfig, *this) +{ +} + +pleiads_sound_device::pleiads_sound_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) + : device_t(mconfig, type, name, tag, owner, clock, shortname, source), + device_sound_interface(mconfig, *this), + m_channel(NULL), + m_sound_latch_a(0), + m_sound_latch_b(0), + m_sound_latch_c(0), + m_poly18(NULL), + m_polybit(0), + m_pa5_resistor(0), + m_pc5_resistor(0), + m_polybit_resistor(0), + m_opamp_resistor(0) +{ +} + +//------------------------------------------------- +// device_config_complete - perform any +// operations now that the configuration is +// complete +//------------------------------------------------- + +void pleiads_sound_device::device_config_complete() +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void pleiads_sound_device::device_start() +{ + /* The real values are _unknown_! + * I took the ones from Naughty Boy / Pop Flamer + */ + + /* charge 10u?? (C??) through 330K?? (R??) -> 3.3s */ + m_pa5.charge_time = 3.3; + + /* discharge 10u?? (C??) through 220k?? (R??) -> 2.2s */ + m_pa5.discharge_time = 2.2; + + /* charge 2.2uF?? through 330?? -> 0.000726s */ + m_pa6.charge_time = 0.000726; + + /* discharge 2.2uF?? through 10k?? -> 0.22s */ + m_pa6.discharge_time = 0.022; + + /* 10k and 10uF */ + m_pb4.charge_time = 0.1; + m_pb4.discharge_time = 0.1; + + /* charge C49 (22u?) via R47 (2k?) and R48 (1k) + * time constant (1000+2000) * 22e-6 = 0.066s */ + m_pc4.charge_time = 0.066; + + /* discharge C49 (22u?) via R48 (1k) and diode D1 + * time constant 1000 * 22e-6 = 0.022s */ + m_pc4.discharge_time = 0.022; + + /* charge 10u?? through 330 -> 0.0033s */ + m_pc5.charge_time = 0.0033; + + /* discharge 10u?? through ??k (R??) -> 0.1s */ + m_pc5.discharge_time = 0.1; + + /* both in K */ + m_pa5_resistor = 33; + m_pc5_resistor = 47; + + /* upper 556 upper half: Ra=10k??, Rb=200k??, C=0.01uF?? -> 351Hz */ + m_tone2.max_freq = 351; + + /* upper 556 lower half: Ra=47k??, Rb=100k??, C=0.01uF?? -> 582Hz */ + m_tone3.max_freq = 582; + + /* lower 556 upper half: Ra=33k??, Rb=100k??, C=0.0047uF?? + freq = 1.44 / ((33000+2*100000) * 0.0047e-6) = approx. 1315 Hz */ + m_tone4.max_freq = 1315; + + /* how to divide the V/C voltage for tone #4 */ + m_polybit_resistor = 47; + m_opamp_resistor = 20; + + /* lower 556 lower half: Ra=100k??, Rb=1k??, C=0.01uF?? + freq = 1.44 / ((100000+2*1000) * 0.01e-6) = approx. 1412 Hz */ + m_noise.freq = 1412; /* higher noise rate than popflame/naughtyb??? */ + + common_start(); +} + +const device_type NAUGHTYB = &device_creator<naughtyb_sound_device>; + +naughtyb_sound_device::naughtyb_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : pleiads_sound_device(mconfig, NAUGHTYB, "Naughty Boy Audio Custom", tag, owner, clock, "naughtyb_sound", __FILE__) +{ +} + +//------------------------------------------------- +// device_config_complete - perform any +// operations now that the configuration is +// complete +//------------------------------------------------- + +void naughtyb_sound_device::device_config_complete() +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void naughtyb_sound_device::device_start() +{ + /* charge 10u??? through 330K (R??) -> 3.3s */ + m_pa5.charge_time = 3.3; + + /* discharge 10u through 220k (R??) -> 2.1s */ + m_pa5.discharge_time = 2.2; + + /* charge 2.2uF through 330 -> 0.000726s */ + m_pa6.charge_time = 0.000726; + + /* discharge 2.2uF through 10K -> 0.022s */ + m_pa6.discharge_time = 0.022; + + /* 10k and 10uF */ + m_pb4.charge_time = 0.1; + m_pb4.discharge_time = 0.1; + + /* charge 10uF? (C??) via 3k?? (R??) and 2k?? (R28?) + * time constant (3000+2000) * 10e-6 = 0.05s */ + m_pc4.charge_time = 0.05 * 10; + + /* discharge 10uF? (C??) via 2k?? R28?? and diode D? + * time constant 2000 * 10e-6 = 0.02s */ + m_pc4.discharge_time = 0.02 * 10; + + /* charge 10u through 330 -> 0.0033s */ + m_pc5.charge_time = 0.0033; + + /* discharge 10u through ??k (R??) -> 0.1s */ + m_pc5.discharge_time = 0.1; + + /* both in K */ + m_pa5_resistor = 100; + m_pc5_resistor = 78; + + /* upper 556 upper half: 10k, 200k, 0.01uF -> 351Hz */ + m_tone2.max_freq = 351; + + /* upper 556 lower half: 47k, 200k, 0.01uF -> 322Hz */ + m_tone3.max_freq = 322; + + /* lower 556 upper half: Ra=33k, Rb=100k, C=0.0047uF + freq = 1.44 / ((33000+2*100000) * 0.0047e-6) = approx. 1315 Hz */ + m_tone4.max_freq = 1315; + + /* how to divide the V/C voltage for tone #4 */ + m_polybit_resistor = 47; + m_opamp_resistor = 20; + + /* lower 556 lower half: Ra=200k, Rb=1k, C=0.01uF + freq = 1.44 / ((200000+2*1000) * 0.01e-6) = approx. 713 Hz */ + m_noise.freq = 713; + + common_start(); +} + +const device_type POPFLAME = &device_creator<popflame_sound_device>; + +popflame_sound_device::popflame_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : pleiads_sound_device(mconfig, POPFLAME, "Pop Flamer Audio Custom", tag, owner, clock, "popflame_sound", __FILE__) +{ +} + +//------------------------------------------------- +// device_config_complete - perform any +// operations now that the configuration is +// complete +//------------------------------------------------- + +void popflame_sound_device::device_config_complete() +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void popflame_sound_device::device_start() +{ + /* charge 10u (C63 in Pop Flamer) through 330K -> 3.3s */ + m_pa5.charge_time = 3.3; + + /* discharge 10u (C63 in Pop Flamer) through 220k -> 2.2s */ + m_pa5.discharge_time = 2.2; + + /* charge 2.2uF through 330 -> 0.000726s */ + m_pa6.charge_time = 0.000726; + + /* discharge 2.2uF through 10K -> 0.022s */ + m_pa6.discharge_time = 0.022; + + /* 2k and 10uF */ + m_pb4.charge_time = 0.02; + m_pb4.discharge_time = 0.02; + + /* charge 2.2uF (C49?) via R47 (100) and R48 (1k) + * time constant (100+1000) * 2.2e-6 = 0.00242 */ + m_pc4.charge_time = 0.000242; + + /* discharge 2.2uF (C49?) via R48 (1k) and diode D1 + * time constant 1000 * 22e-6 = 0.0022s */ + m_pc4.discharge_time = 0.00022; + + /* charge 22u (C52 in Pop Flamer) through 10k -> 0.22s */ + m_pc5.charge_time = 0.22; + + /* discharge 22u (C52 in Pop Flamer) through ??k (R??) -> 0.1s */ + m_pc5.discharge_time = 0.1; + + /* both in K */ + m_pa5_resistor = 33; + m_pc5_resistor = 47; + + /* upper 556 upper half: Ra=10k, Rb=100k, C=0.01uF -> 1309Hz */ + m_tone2.max_freq = 1309; + + /* upper 556 lower half: Ra=10k??, Rb=120k??, C=0.01uF -> 1108Hz */ + m_tone3.max_freq = 1108; + + /* lower 556 upper half: Ra=33k, Rb=100k, C=0.0047uF + freq = 1.44 / ((33000+2*100000) * 0.0047e-6) = approx. 1315 Hz */ + m_tone4.max_freq = 1315; + + /* how to divide the V/C voltage for tone #4 */ + m_polybit_resistor = 20; + m_opamp_resistor = 20; + + /* lower 556 lower half: Ra=200k, Rb=1k, C=0.01uF + freq = 1.44 / ((200000+2*1000) * 0.01e-6) = approx. 713 Hz */ + m_noise.freq = 713; + + common_start(); +} + +/***************************************************************************** + * Tone #1 is a fixed 8 kHz signal divided by 1 to 15. + *****************************************************************************/ +inline int pleiads_sound_device::tone1(int samplerate) +{ + if( (m_sound_latch_a & 15) != 15 ) + { + m_tone1.counter -= TONE1_CLOCK; + while( m_tone1.counter <= 0 ) + { + m_tone1.counter += samplerate; + if( ++m_tone1.max_freq == 16 ) + { + m_tone1.max_freq = m_sound_latch_a & 15; + m_tone1.output ^= 1; + } + } + } + return m_tone1.output ? VMAX : -VMAX; +} + +/***************************************************************************** + * Tones #2 and #3 are coming from the upper 556 chip + * It's labelled IC96 in Pop Flamer, 4D(??) in Naughty Boy. + * C68 controls the frequencies of tones #2 and #3 (V/C inputs) + *****************************************************************************/ +inline int pleiads_sound_device::update_pb4(int samplerate) +{ + /* bit 4 of latch B: charge 10uF (C28/C68) through 10k (R19/R25) */ + if( m_sound_latch_b & 0x10 ) + { + if( m_pb4.level < VMAX ) + { + m_pb4.counter -= (int)((VMAX - m_pb4.level) / m_pb4.charge_time); + if( m_pb4.counter <= 0 ) + { + int n = (-m_pb4.counter / samplerate) + 1; + m_pb4.counter += n * samplerate; + if( (m_pb4.level += n) > VMAX ) + m_pb4.level = VMAX; + } + } + } + else + { + if( m_pb4.level > VMIN ) + { + m_pb4.counter -= (int)((m_pb4.level - VMIN) / m_pb4.discharge_time); + if( m_pb4.counter <= 0 ) + { + int n = (-m_pb4.counter / samplerate) + 1; + m_pb4.counter += n * samplerate; + if( (m_pb4.level -= n) < VMIN) + m_pb4.level = VMIN; + } + } + } + return m_pb4.level; +} + +inline int pleiads_sound_device::tone23(int samplerate) +{ + int level = VMAX - update_pb4(samplerate); + int sum = 0; + + /* bit 5 = low: tone23 disabled */ + if( (m_sound_latch_b & 0x20) == 0 ) + return sum; + + /* modulate timers from the upper 556 with the voltage on Cxx on PB4. */ + if( level < VMAX ) + { + m_tone2.counter -= m_tone2.max_freq * level / 32768; + if( m_tone2.counter <= 0 ) + { + int n = (-m_tone2.counter / samplerate) + 1; + m_tone2.counter += n * samplerate; + m_tone2.output = (m_tone2.output + n) & 1; + } + + m_tone3.counter -= m_tone3.max_freq*1/3 + m_tone3.max_freq*2/3 * level / 33768; + if( m_tone3.counter <= 0 ) + { + int n = (-m_tone2.counter / samplerate) + 1; + m_tone3.counter += samplerate; + m_tone3.output = (m_tone3.output + n) & 1; + } + } + + sum += (m_tone2.output) ? VMAX : -VMAX; + sum += (m_tone3.output) ? VMAX : -VMAX; + + return sum / 2; +} + +/***************************************************************************** + * Tone #4 comes from upper half of the lower 556 (IC98 in Pop Flamer) + * It's modulated by the voltage at C49, which is then divided between + * 0V or 5V, depending on the polynome output bit. + * The tone signal gates two signals (bits 5 of latches A and C), but + * these are also swept between two levels (C52 and C53 in Pop Flamer). + *****************************************************************************/ +inline int pleiads_sound_device::update_c_pc4(int samplerate) +{ + #define PC4_MIN (int)(VMAX * 7 / 50) + + /* bit 4 of latch C: (part of videoreg_w) hi? */ + if (m_sound_latch_c & 0x10) + { + if (m_pc4.level < VMAX) + { + m_pc4.counter -= (int)((VMAX - m_pc4.level) / m_pc4.charge_time); + if( m_pc4.counter <= 0 ) + { + int n = (-m_pc4.counter / samplerate) + 1; + m_pc4.counter += n * samplerate; + if( (m_pc4.level += n) > VMAX ) + m_pc4.level = VMAX; + } + } + } + else + { + if (m_pc4.level > PC4_MIN) + { + m_pc4.counter -= (int)((m_pc4.level - PC4_MIN) / m_pc4.discharge_time); + if( m_pc4.counter <= 0 ) + { + int n = (-m_pc4.counter / samplerate) + 1; + m_pc4.counter += n * samplerate; + if( (m_pc4.level -= n) < PC4_MIN ) + m_pc4.level = PC4_MIN; + } + } + } + return m_pc4.level; +} + +inline int pleiads_sound_device::update_c_pc5(int samplerate) +{ + /* bit 5 of latch C: charge or discharge C52 */ + if (m_sound_latch_c & 0x20) + { + if (m_pc5.level < VMAX) + { + m_pc5.counter -= (int)((VMAX - m_pc5.level) / m_pc5.charge_time); + if( m_pc5.counter <= 0 ) + { + int n = (-m_pc5.counter / samplerate) + 1; + m_pc5.counter += n * samplerate; + if( (m_pc5.level += n) > VMAX ) + m_pc5.level = VMAX; + } + } + } + else + { + if (m_pc5.level > VMIN) + { + m_pc5.counter -= (int)((m_pc5.level - VMIN) / m_pc5.discharge_time); + if( m_pc5.counter <= 0 ) + { + int n = (-m_pc5.counter / samplerate) + 1; + m_pc5.counter += samplerate; + if( (m_pc5.level -= n) < VMIN ) + m_pc5.level = VMIN; + } + } + } + return m_pc5.level; +} + +inline int pleiads_sound_device::update_c_pa5(int samplerate) +{ + /* bit 5 of latch A: charge or discharge C63 */ + if (m_sound_latch_a & 0x20) + { + if (m_pa5.level < VMAX) + { + m_pa5.counter -= (int)((VMAX - m_pa5.level) / m_pa5.charge_time); + if( m_pa5.counter <= 0 ) + { + int n = (-m_pa5.counter / samplerate) + 1; + m_pa5.counter += n * samplerate; + if( (m_pa5.level += n) > VMAX ) + m_pa5.level = VMAX; + } + } + } + else + { + if (m_pa5.level > VMIN) + { + m_pa5.counter -= (int)((m_pa5.level - VMIN) / m_pa5.discharge_time); + if( m_pa5.counter <= 0 ) + { + int n = (-m_pa5.counter / samplerate) + 1; + m_pa5.counter += samplerate; + if( (m_pa5.level -= n) < VMIN ) + m_pa5.level = VMIN; + } + } + } + return m_pa5.level; +} + +inline int pleiads_sound_device::tone4(int samplerate) +{ + int level = update_c_pc4(samplerate); + int vpc5 = update_c_pc5(samplerate); + int vpa5 = update_c_pa5(samplerate); + int sum = 0; + + /* Two resistors divide the output voltage of the op-amp between + * polybit = 0: 0V and level: x * opamp_resistor / (opamp_resistor + polybit_resistor) + * polybit = 1: level and 5V: x * polybit_resistor / (opamp_resistor + polybit_resistor) + */ + if (m_polybit) + level = level + (VMAX - level) * m_opamp_resistor / (m_opamp_resistor + m_polybit_resistor); + else + level = level * m_polybit_resistor / (m_opamp_resistor + m_polybit_resistor); + + m_tone4.counter -= m_tone4.max_freq * level / 32768; + if( m_tone4.counter <= 0 ) + { + int n = (-m_tone4.counter / samplerate) + 1; + m_tone4.counter += n * samplerate; + m_tone4.output = (m_tone4.output + n) & 1; + } + + /* mix the two signals */ + sum = vpc5 * m_pa5_resistor / (m_pa5_resistor + m_pc5_resistor) + + vpa5 * m_pc5_resistor / (m_pa5_resistor + m_pc5_resistor); + + return (m_tone4.output) ? sum : -sum; +} + +/***************************************************************************** + * Noise comes from a shift register (4006) hooked up just like in Phoenix. + * Difference: the clock frequecy is toggled between two values only by + * bit 4 of latch A. The output of the first shift register can be zapped(?) + * by some control line (IC87 in Pop Flamer: not yet implemented) + *****************************************************************************/ +inline int pleiads_sound_device::update_c_pa6(int samplerate) +{ + /* bit 6 of latch A: charge or discharge C63 */ + if (m_sound_latch_a & 0x40) + { + if (m_pa6.level < VMAX) + { + m_pa6.counter -= (int)((VMAX - m_pa6.level) / m_pa6.charge_time); + if( m_pa6.counter <= 0 ) + { + int n = (-m_pa6.counter / samplerate) + 1; + m_pa6.counter += n * samplerate; + if( (m_pa6.level += n) > VMAX ) + m_pa6.level = VMAX; + } + } + } + else + { + /* only discharge of poly bit is active */ + if (m_polybit && m_pa6.level > VMIN) + { + /* discharge 10uF through 10k -> 0.1s */ + m_pa6.counter -= (int)((m_pa6.level - VMIN) / 0.1); + if( m_pa6.counter <= 0 ) + { + int n = (-m_pa6.counter / samplerate) + 1; + m_pa6.counter += n * samplerate; + if( (m_pa6.level -= n) < VMIN ) + m_pa6.level = VMIN; + } + } + } + return m_pa6.level; +} + + +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; + } + + /* The polynome output bit is used to gate bits 6 + 7 of + * sound latch A through the upper half of a 4066 chip. + * Bit 6 is sweeping a capacitor between 0V and 4.7V + * while bit 7 is connected directly to the 4066. + * Both outputs are then filtered, bit 7 even twice, + * but it's beyond me what the filters there are doing... + */ + if (m_polybit) + { + sum += c_pa6_level; + /* bit 7 is connected directly */ + if (m_sound_latch_a & 0x80) + sum += VMAX; + } + else + { + sum -= c_pa6_level; + /* bit 7 is connected directly */ + if (m_sound_latch_a & 0x80) + sum -= VMAX; + } + + return sum / 2; +} + +WRITE8_MEMBER( pleiads_sound_device::control_a_w ) +{ + if (data == m_sound_latch_a) + return; + + logerror("pleiads_sound_control_b_w $%02x\n", data); + + m_channel->update(); + m_sound_latch_a = data; +} + +WRITE8_MEMBER( pleiads_sound_device::control_b_w ) +{ + /* + * pitch selects one of 4 possible clock inputs + * (actually 3, because IC2 and IC3 are tied together) + * write note value to TMS3615; voice b1 & b2 + */ + int note = data & 15; + int pitch = (data >> 6) & 3; + + if (data == m_sound_latch_b) + return; + + logerror("pleiads_sound_control_b_w $%02x\n", data); + + if (pitch == 3) + pitch = 2; /* 2 and 3 are the same */ + + m_tms->tms36xx_note_w(pitch, note); + + m_channel->update(); + m_sound_latch_b = data; +} + +/* two bits (4 + 5) from the videoreg_w latch go here */ +WRITE8_MEMBER( pleiads_sound_device::control_c_w ) +{ + if (data == m_sound_latch_c) + return; + + logerror("pleiads_sound_control_c_w $%02x\n", data); + m_channel->update(); + m_sound_latch_c = data; +} + +void pleiads_sound_device::common_start() +{ + int i, j; + UINT32 shiftreg; + + m_tms = machine().device<tms36xx_device>("tms"); + m_pc4.level = PC4_MIN; + m_poly18 = auto_alloc_array_clear(machine(), UINT32, 1ul << (18-5)); + + shiftreg = 0; + for( i = 0; i < (1ul << (18-5)); i++ ) + { + UINT32 bits = 0; + for( j = 0; j < 32; j++ ) + { + bits = (bits >> 1) | (shiftreg << 31); + if( ((shiftreg >> 16) & 1) == ((shiftreg >> 17) & 1) ) + shiftreg = (shiftreg << 1) | 1; + else + shiftreg <<= 1; + } + m_poly18[i] = bits; + } + + m_channel = machine().sound().stream_alloc(*this, 0, 1, machine().sample_rate()); + + save_item(NAME(m_sound_latch_a)); + save_item(NAME(m_sound_latch_b)); + save_item(NAME(m_sound_latch_c)); + save_item(NAME(m_polybit)); + save_item(NAME(m_pa5_resistor)); + save_item(NAME(m_pc5_resistor)); + save_item(NAME(m_polybit_resistor)); + save_item(NAME(m_opamp_resistor)); + save_item(NAME(m_tone1.counter)); + save_item(NAME(m_tone1.output)); + save_item(NAME(m_tone1.max_freq)); + save_item(NAME(m_tone2.counter)); + save_item(NAME(m_tone2.output)); + save_item(NAME(m_tone2.max_freq)); + save_item(NAME(m_tone3.counter)); + save_item(NAME(m_tone3.output)); + save_item(NAME(m_tone3.max_freq)); + save_item(NAME(m_tone4.counter)); + save_item(NAME(m_tone4.output)); + save_item(NAME(m_tone4.max_freq)); + save_item(NAME(m_pa5.counter)); + save_item(NAME(m_pa5.level)); + save_item(NAME(m_pa5.charge_time)); + save_item(NAME(m_pa5.discharge_time)); + save_item(NAME(m_pa6.counter)); + save_item(NAME(m_pa6.level)); + save_item(NAME(m_pa6.charge_time)); + save_item(NAME(m_pa6.discharge_time)); + save_item(NAME(m_pb4.counter)); + save_item(NAME(m_pb4.level)); + save_item(NAME(m_pb4.charge_time)); + save_item(NAME(m_pb4.discharge_time)); + save_item(NAME(m_pc4.counter)); + save_item(NAME(m_pc4.level)); + save_item(NAME(m_pc4.charge_time)); + save_item(NAME(m_pc4.discharge_time)); + save_item(NAME(m_pc5.counter)); + save_item(NAME(m_pc5.level)); + save_item(NAME(m_pc5.charge_time)); + save_item(NAME(m_pc5.discharge_time)); + save_item(NAME(m_noise.counter)); + save_item(NAME(m_noise.polyoffs)); + save_item(NAME(m_noise.freq)); + save_pointer(NAME(m_poly18), (1ul << (18-5))); +} + +//------------------------------------------------- +// sound_stream_update - handle a stream update +//------------------------------------------------- + +void pleiads_sound_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) +{ + int rate = machine().sample_rate(); + stream_sample_t *buffer = outputs[0]; + + while( samples-- > 0 ) + { + int sum = tone1(rate)/2 + tone23(rate)/2 + tone4(rate) + noise(rate); + *buffer++ = sum < 32768 ? sum > -32768 ? sum : -32768 : 32767; + } +} + +void naughtyb_sound_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) +{ + pleiads_sound_device::sound_stream_update(stream, inputs, outputs, samples); +} + +void popflame_sound_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) +{ + pleiads_sound_device::sound_stream_update(stream, inputs, outputs, samples); +} |