diff options
Diffstat (limited to 'src/devices/sound/dave.cpp')
-rw-r--r-- | src/devices/sound/dave.cpp | 625 |
1 files changed, 0 insertions, 625 deletions
diff --git a/src/devices/sound/dave.cpp b/src/devices/sound/dave.cpp deleted file mode 100644 index 4ca7248a520..00000000000 --- a/src/devices/sound/dave.cpp +++ /dev/null @@ -1,625 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Curt Coder -/********************************************************************** - - Intelligent Designs DAVE emulation - -**********************************************************************/ - -#include "emu.h" -#include "dave.h" - -//#define VERBOSE 1 -#include "logmacro.h" - - -//************************************************************************** -// MACROS / CONSTANTS -//************************************************************************** - -#define STEP 0x08000 - - - -//************************************************************************** -// DEVICE DEFINITIONS -//************************************************************************** - -DEFINE_DEVICE_TYPE(DAVE, dave_device, "dave", "Inteligent Designs DAVE") - - -void dave_device::z80_program_map(address_map &map) -{ - map(0x0000, 0xffff).rw(FUNC(dave_device::program_r), FUNC(dave_device::program_w)); -} - -void dave_device::z80_io_map(address_map &map) -{ - map(0x0000, 0xffff).rw(FUNC(dave_device::io_r), FUNC(dave_device::io_w)); -} - - -void dave_device::program_map(address_map &map) -{ -} - -void dave_device::io_map(address_map &map) -{ -} - - - -//************************************************************************** -// LIVE DEVICE -//************************************************************************** - -//------------------------------------------------- -// dave_device - constructor -//------------------------------------------------- - -dave_device::dave_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : device_t(mconfig, DAVE, tag, owner, clock), - device_memory_interface(mconfig, *this), - device_sound_interface(mconfig, *this), - m_program_space_config("program", ENDIANNESS_LITTLE, 8, 22, 0, address_map_constructor(FUNC(dave_device::program_map), this)), - m_io_space_config("i/o", ENDIANNESS_LITTLE, 8, 16, 0, address_map_constructor(FUNC(dave_device::io_map), this)), - m_write_irq(*this), - m_write_lh(*this), - m_write_rh(*this), - m_irq_status(0) -{ -} - - -//------------------------------------------------- -// device_start - device-specific startup -//------------------------------------------------- - -void dave_device::device_start() -{ - // resolve callbacks - m_write_irq.resolve_safe(); - m_write_lh.resolve_safe(); - m_write_rh.resolve_safe(); - - // allocate timers - m_timer_1hz = timer_alloc(TIMER_1HZ); - m_timer_1hz->adjust(attotime::from_hz(2), 0, attotime::from_hz(2)); - - m_timer_50hz = timer_alloc(TIMER_50HZ); - m_timer_50hz->adjust(attotime::from_hz(2000), 0, attotime::from_hz(2000)); - - // state saving - save_item(NAME(m_segment)); - save_item(NAME(m_irq_status)); - save_item(NAME(m_irq_enable)); - save_item(NAME(m_period)); - save_item(NAME(m_count)); - save_item(NAME(m_level)); - save_item(NAME(m_level_or)); - save_item(NAME(m_level_and)); - save_item(NAME(m_mame_volumes)); - - for (auto & elem : m_period) - elem = (STEP * machine().sample_rate()) / 125000; - - for (auto & elem : m_count) - elem = (STEP * machine().sample_rate()) / 125000; - - for (auto & elem : m_level) - elem = 0; - - for (auto & elem : m_level_or) - elem = 0; - - for (auto & elem : m_level_and) - elem = 0; - - for (auto & elem : m_mame_volumes) - elem = 0; - - /* dave has 3 tone channels and 1 noise channel. - the volumes are mixed internally and output as left and right volume */ - - /* 3 tone channels + 1 noise channel */ - m_sound_stream_var = machine().sound().stream_alloc(*this, 0, 2, machine().sample_rate()); -} - - -//------------------------------------------------- -// device_reset - device-specific reset -//------------------------------------------------- - -void dave_device::device_reset() -{ - m_write_irq(CLEAR_LINE); - - for (auto & elem : m_segment) - elem = 0; - - m_irq_status = 0; - m_irq_enable = 0; - - for (auto & elem : m_regs) - elem = 0; -} - - -//------------------------------------------------- -// device_timer - handler timer events -//------------------------------------------------- - -void dave_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) -{ - switch (id) - { - case TIMER_1HZ: - m_irq_status ^= IRQ_1HZ_DIVIDER; - - if (m_irq_status & IRQ_1HZ_DIVIDER) - m_irq_status |= IRQ_1HZ_LATCH; - break; - - case TIMER_50HZ: - m_irq_status ^= IRQ_50HZ_DIVIDER; - - if (m_irq_status & IRQ_50HZ_DIVIDER) - m_irq_status |= IRQ_50HZ_LATCH; - break; - } - - update_interrupt(); -} - - -//------------------------------------------------- -// memory_space_config - return a description of -// any address spaces owned by this device -//------------------------------------------------- - -device_memory_interface::space_config_vector dave_device::memory_space_config() const -{ - return space_config_vector { - std::make_pair(AS_PROGRAM, &m_program_space_config), - std::make_pair(AS_IO, &m_io_space_config) - }; -} - - -//------------------------------------------------- -// sound_stream_update - handle a stream update -//------------------------------------------------- - -void dave_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) -{ - stream_sample_t *buffer1, *buffer2; - /* 0 = channel 0 left volume, 1 = channel 0 right volume, - 2 = channel 1 left volume, 3 = channel 1 right volume, - 4 = channel 2 left volume, 5 = channel 2 right volume - 6 = noise channel left volume, 7 = noise channel right volume */ - int output_volumes[8]; - int left_volume; - int right_volume; - - //logerror("sound update!\n"); - - buffer1 = outputs[0]; - buffer2 = outputs[1]; - - while (samples) - { - int vol[4]; - - /* vol[] keeps track of how long each square wave stays */ - /* in the 1 position during the sample period. */ - vol[0] = vol[1] = vol[2] = vol[3] = 0; - - for (int i = 0; i < 3; i++) - { - if ((m_regs[7] & (1 << i))==0) - { - if (m_level[i]) vol[i] += m_count[i]; - m_count[i] -= STEP; - /* Period[i] is the half period of the square wave. Here, in each */ - /* loop I add Period[i] twice, so that at the end of the loop the */ - /* square wave is in the same status (0 or 1) it was at the start. */ - /* vol[i] is also incremented by Period[i], since the wave has been 1 */ - /* exactly half of the time, regardless of the initial position. */ - /* If we exit the loop in the middle, Output[i] has to be inverted */ - /* and vol[i] incremented only if the exit status of the square */ - /* wave is 1. */ - while (m_count[i] <= 0) - { - m_count[i] += m_period[i]; - if (m_count[i] > 0) - { - m_level[i] ^= 0x0ffffffff; - if (m_level[i]) vol[i] += m_period[i]; - break; - } - m_count[i] += m_period[i]; - vol[i] += m_period[i]; - } - if (m_level[i]) - vol[i] -= m_count[i]; - } - } - - /* update volume outputs */ - - /* setup output volumes for each channel */ - /* channel 0 */ - output_volumes[0] = ((m_level[0] & m_level_and[0]) | m_level_or[0]) & m_mame_volumes[0]; - output_volumes[1] = ((m_level[0] & m_level_and[1]) | m_level_or[1]) & m_mame_volumes[4]; - /* channel 1 */ - output_volumes[2] = ((m_level[1] & m_level_and[2]) | m_level_or[2]) & m_mame_volumes[1]; - output_volumes[3] = ((m_level[1] & m_level_and[3]) | m_level_or[3]) & m_mame_volumes[5]; - /* channel 2 */ - output_volumes[4] = ((m_level[2] & m_level_and[4]) | m_level_or[4]) & m_mame_volumes[2]; - output_volumes[5] = ((m_level[2] & m_level_and[5]) | m_level_or[5]) & m_mame_volumes[6]; - /* channel 3 */ - output_volumes[6] = ((m_level[3] & m_level_and[6]) | m_level_or[6]) & m_mame_volumes[3]; - output_volumes[7] = ((m_level[3] & m_level_and[7]) | m_level_or[7]) & m_mame_volumes[7]; - - left_volume = (output_volumes[0] + output_volumes[2] + output_volumes[4] + output_volumes[6])>>2; - right_volume = (output_volumes[1] + output_volumes[3] + output_volumes[5] + output_volumes[7])>>2; - - *(buffer1++) = left_volume; - *(buffer2++) = right_volume; - - samples--; - } -} - - -//------------------------------------------------- -// int1_w - interrupt 1 write -//------------------------------------------------- - -WRITE_LINE_MEMBER( dave_device::int1_w ) -{ - if (!(m_irq_status & IRQ_INT1) && state) - m_irq_status |= IRQ_INT1_LATCH; - - if (state) - m_irq_status |= IRQ_INT1; - else - m_irq_status &= ~IRQ_INT1; - - update_interrupt(); -} - - -//------------------------------------------------- -// int2_w - interrupt 2 write -//------------------------------------------------- - -WRITE_LINE_MEMBER( dave_device::int2_w ) -{ - if (!(m_irq_status & IRQ_INT2) && state) - m_irq_status |= IRQ_INT2_LATCH; - - if (state) - m_irq_status |= IRQ_INT2; - else - m_irq_status &= ~IRQ_INT2; - - update_interrupt(); -} - - -//------------------------------------------------- -// program_r - program space read -//------------------------------------------------- - -READ8_MEMBER( dave_device::program_r ) -{ - uint8_t segment = m_segment[offset >> 14]; - offset = (segment << 14) | (offset & 0x3fff); - - return this->space(AS_PROGRAM).read_byte(offset); -} - - -//------------------------------------------------- -// program_w - program space write -//------------------------------------------------- - -WRITE8_MEMBER( dave_device::program_w ) -{ - uint8_t segment = m_segment[offset >> 14]; - offset = (segment << 14) | (offset & 0x3fff); - - this->space(AS_PROGRAM).write_byte(offset, data); -} - - -//------------------------------------------------- -// io_r - I/O space read -//------------------------------------------------- - -READ8_MEMBER( dave_device::io_r ) -{ - uint8_t data = 0; - - switch (offset & 0xff) - { - case 0xa0: - case 0xa1: - case 0xa2: - case 0xa3: - case 0xa4: - case 0xa5: - case 0xa6: - case 0xa7: - case 0xa8: - case 0xa9: - case 0xaa: - case 0xab: - case 0xac: - case 0xad: - case 0xae: - case 0xaf: - case 0xb8: - case 0xb9: - case 0xba: - case 0xbb: - case 0xbc: - case 0xbd: - case 0xbe: - case 0xbf: - data = 0xff; - break; - - case 0xb0: case 0xb1: case 0xb2: case 0xb3: - data = m_segment[offset & 0x03]; - break; - - case 0xb4: - data = m_irq_status; - break; - - default: - data = this->space(AS_IO).read_byte(offset); - } - - return data; -} - - -//------------------------------------------------- -// io_w - I/O space write -//------------------------------------------------- - -WRITE8_MEMBER( dave_device::io_w ) -{ - switch (offset & 0xff) - { - /* channel 0 down-counter */ - case 0xa0: - case 0xa1: - /* channel 1 down-counter */ - case 0xa2: - case 0xa3: - /* channel 2 down-counter */ - case 0xa4: - case 0xa5: - { - int count = 0; - int channel_index = (offset>>1)&3; - - /* Fout = 125,000 / (n+1) Hz */ - - /* sample rate/clock */ - - - /* get down-count */ - switch (offset & 0x01) - { - case 0: - { - count = (data & 0x0ff) | ((m_regs[(offset & 0x1f) + 1] & 0x0f)<<8); - } - break; - - case 1: - { - count = (m_regs[(offset & 0x1f) - 1] & 0x0ff) | ((data & 0x0f)<<8); - - } - break; - } - - count++; - - - m_period[channel_index] = ((STEP * machine().sample_rate())/125000) * count; - - m_regs[offset & 0x1f] = data; - } - break; - - /* channel 0 left volume */ - case 0xa8: - /* channel 1 left volume */ - case 0xa9: - /* channel 2 left volume */ - case 0xaa: - /* noise channel left volume */ - case 0xab: - /* channel 0 right volume */ - case 0xac: - /* channel 1 right volume */ - case 0xad: - /* channel 2 right volume */ - case 0xae: - /* noise channel right volume */ - case 0xaf: - { - /* update mame version of volume from data written */ - /* 0x03f->0x07e00. Max is 0x07fff */ - /* I believe the volume is linear - to be checked! */ - m_mame_volumes[(offset & 0x1f) - 8] = (data & 0x03f) << 9; - - m_regs[offset & 0x1f] = data; - } - break; - - case 0xa6: - break; - - case 0xa7: - { - /* force => the value of this register is forced regardless of the wave - state, - remove => this value is force to zero so that it has no influence over - the final volume calculation, regardless of wave state - use => the volume value is dependant on the wave state and is included - in the final volume calculation */ - - //logerror("selectable int "); - switch ((data>>5) & 0x03) - { - case 0: - { - //logerror("1kHz\n"); - m_timer_50hz->adjust(attotime::from_hz(2000), 0, attotime::from_hz(2000)); - } - break; - - case 1: - { - //logerror("50Hz\n"); - m_timer_50hz->adjust(attotime::from_hz(100), 0, attotime::from_hz(100)); - } - break; - - case 2: - { - //logerror("tone channel 0\n"); - } - break; - - case 3: - { - //logerror("tone channel 1\n"); - } - break; - } - - - - /* turn L.H audio output into D/A, outputting value in R8 */ - if (data & (1<<3)) - { - /* force r8 value */ - m_level_or[0] = 0x0ffff; - m_level_and[0] = 0x00; - - /* remove r9 value */ - m_level_or[2] = 0x000; - m_level_and[2] = 0x00; - - /* remove r10 value */ - m_level_or[4] = 0x000; - m_level_and[4] = 0x00; - - /* remove r11 value */ - m_level_or[6] = 0x000; - m_level_and[6] = 0x00; - } - else - { - /* use r8 value */ - m_level_or[0] = 0x000; - m_level_and[0] = 0xffff; - - /* use r9 value */ - m_level_or[2] = 0x000; - m_level_and[2] = 0xffff; - - /* use r10 value */ - m_level_or[4] = 0x000; - m_level_and[4] = 0xffff; - - /* use r11 value */ - m_level_or[6] = 0x000; - m_level_and[6] = 0xffff; - } - - /* turn L.H audio output into D/A, outputting value in R12 */ - if (data & (1<<4)) - { - /* force r12 value */ - m_level_or[1] = 0x0ffff; - m_level_and[1] = 0x00; - - /* remove r13 value */ - m_level_or[3] = 0x000; - m_level_and[3] = 0x00; - - /* remove r14 value */ - m_level_or[5] = 0x000; - m_level_and[5] = 0x00; - - /* remove r15 value */ - m_level_or[7] = 0x000; - m_level_and[7] = 0x00; - } - else - { - /* use r12 value */ - m_level_or[1] = 0x000; - m_level_and[1] = 0xffff; - - /* use r13 value */ - m_level_or[3] = 0x000; - m_level_and[3] = 0xffff; - - /* use r14 value */ - m_level_or[5] = 0x000; - m_level_and[5] = 0xffff; - - /* use r15 value */ - m_level_or[7] = 0x000; - m_level_and[7] = 0xffff; - } - - m_regs[offset & 0x1f] = data; - } - break; - - case 0xb0: case 0xb1: case 0xb2: case 0xb3: - m_segment[offset & 0x03] = data; - - m_regs[offset & 0x1f] = data; - break; - - case 0xb4: - m_irq_enable = data; - m_irq_status &= ~(m_irq_enable & IRQ_LATCH); - update_interrupt(); - - m_regs[offset & 0x1f] = data; - break; - - case 0xbf: - m_regs[offset & 0x1f] = data; - break; - - default: - this->space(AS_IO).write_byte(offset, data); - } -} - - -//------------------------------------------------- -// update_interrupt - -//------------------------------------------------- - -void dave_device::update_interrupt() -{ - int state = ((m_irq_status & (m_irq_enable << 1)) & IRQ_LATCH) ? ASSERT_LINE : CLEAR_LINE; - - m_write_irq(state); -} |