diff options
Diffstat (limited to 'src/mame/audio/targ.cpp')
-rw-r--r-- | src/mame/audio/targ.cpp | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/src/mame/audio/targ.cpp b/src/mame/audio/targ.cpp deleted file mode 100644 index d83b665955f..00000000000 --- a/src/mame/audio/targ.cpp +++ /dev/null @@ -1,207 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/************************************************************************* - - Targ hardware - -*************************************************************************/ - -/* Sound channel usage - 0 = CPU music, Shoot - 1 = Crash - 2 = Spectar sound - 3 = Tone generator -*/ - -#include "emu.h" -#include "includes/exidy.h" -#include "sound/volt_reg.h" -#include "speaker.h" - - - -#define SPECTAR_MAXFREQ 525000 -#define TARG_MAXFREQ 125000 - -static const int16_t sine_wave[32] = -{ - 0x0f0f, 0x0f0f, 0x0f0f, 0x0606, 0x0606, 0x0909, 0x0909, 0x0606, 0x0606, 0x0909, 0x0606, 0x0d0d, 0x0f0f, 0x0f0f, 0x0d0d, 0x0000, - -0x191a, -0x2122, -0x1e1f, -0x191a, -0x1314, -0x191a, -0x1819, -0x1819, -0x1819, -0x1314, -0x1314, -0x1314, -0x1819, -0x1e1f, -0x1e1f, -0x1819 -}; - - -/* some macros to make detecting bit changes easier */ -#define RISING_EDGE(bit) ( (data & bit) && !(m_port_1_last & bit)) -#define FALLING_EDGE(bit) (!(data & bit) && (m_port_1_last & bit)) - - -void exidy_state::adjust_sample(uint8_t freq) -{ - m_tone_freq = freq; - - if (!m_samples->playing(3)) - { - m_samples->set_volume(3, 0); - m_samples->start_raw(3, sine_wave, 32, 1000, true); - } - - if ((m_tone_freq == 0xff) || (m_tone_freq == 0x00)) - m_samples->set_volume(3, 0); - else - { - m_samples->set_frequency(3, 1.0 * m_max_freq / (0xff - m_tone_freq)); - m_samples->set_volume(3, m_tone_active); - } -} - - -WRITE8_MEMBER( exidy_state::targ_audio_1_w ) -{ - /* CPU music */ - if (BIT(m_port_1_last ^ data, 0)) - m_dac->write(BIT(data, 0)); - - /* shot */ - if (FALLING_EDGE(0x02) && !m_samples->playing(0)) m_samples->start(0,1); - if (RISING_EDGE(0x02)) m_samples->start(0,1); - - /* crash */ - if (RISING_EDGE(0x20)) - { - if (data & 0x40) - m_samples->start(1,0); - else - m_samples->start(1,2); - } - - /* Sspec */ - if (data & 0x10) - m_samples->stop(2); - else - { - if ((data & 0x08) != (m_port_1_last & 0x08)) - { - if (data & 0x08) - m_samples->start(2,3,true); - else - m_samples->start(2,4,true); - } - } - - /* Game (tone generator enable) */ - if (FALLING_EDGE(0x80)) - { - m_tone_pointer = 0; - m_tone_active = 0; - - adjust_sample(m_tone_freq); - } - - if (RISING_EDGE(0x80)) - m_tone_active=1; - - m_port_1_last = data; -} - - -WRITE8_MEMBER( exidy_state::targ_audio_2_w ) -{ - if ((data & 0x01) && !(m_port_2_last & 0x01)) - { - uint8_t *prom = memregion("targ")->base(); - - m_tone_pointer = (m_tone_pointer + 1) & 0x0f; - - adjust_sample(prom[((data & 0x02) << 3) | m_tone_pointer]); - } - - m_port_2_last = data; -} - - -WRITE8_MEMBER( exidy_state::spectar_audio_2_w ) -{ - adjust_sample(data); -} - - -static const char *const sample_names[] = -{ - "*targ", - "expl", - "shot", - "sexpl", - "spslow", - "spfast", - nullptr -}; - - - -void exidy_state::common_audio_start(int freq) -{ - m_max_freq = freq; - - m_tone_freq = 0; - m_tone_active = 0; - - /* start_raw can't be called here: chan.source will be set by - samples_device::device_start and then nulled out by samples_device::device_reset - at the soft_reset stage of init_machine() and will never be set again. - Thus, I've moved it to exidy_state::adjust_sample() were it will be set after - machine initialization. */ - //m_samples->set_volume(3, 0); - //m_samples->start_raw(3, sine_wave, 32, 1000, true); - - save_item(NAME(m_port_1_last)); - save_item(NAME(m_port_2_last)); - save_item(NAME(m_tone_freq)); - save_item(NAME(m_tone_active)); -} - - -SAMPLES_START_CB_MEMBER(exidy_state::spectar_audio_start) -{ - common_audio_start(SPECTAR_MAXFREQ); -} - - -SAMPLES_START_CB_MEMBER(exidy_state::targ_audio_start) -{ - common_audio_start(TARG_MAXFREQ); - - m_tone_pointer = 0; - - save_item(NAME(m_tone_pointer)); -} - - -void exidy_state::spectar_audio(machine_config &config) -{ - SPEAKER(config, "speaker").front_center(); - - SAMPLES(config, m_samples); - m_samples->set_channels(4); - m_samples->set_samples_names(sample_names); - m_samples->set_samples_start_callback(FUNC(exidy_state::spectar_audio_start)); - m_samples->add_route(ALL_OUTPUTS, "speaker", 0.25); - - DAC_1BIT(config, m_dac, 0).add_route(ALL_OUTPUTS, "speaker", 0.99); - voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref", 0)); - vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT); -} - -void exidy_state::targ_audio(machine_config &config) -{ - SPEAKER(config, "speaker").front_center(); - - SAMPLES(config, m_samples); - m_samples->set_channels(4); - m_samples->set_samples_names(sample_names); - m_samples->set_samples_start_callback(FUNC(exidy_state::targ_audio_start)); - m_samples->add_route(ALL_OUTPUTS, "speaker", 0.25); - - DAC_1BIT(config, m_dac, 0).add_route(ALL_OUTPUTS, "speaker", 0.99); - voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref", 0)); - vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT); -} |