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-rw-r--r--src/mame/machine/pce_cd.cpp1661
1 files changed, 0 insertions, 1661 deletions
diff --git a/src/mame/machine/pce_cd.cpp b/src/mame/machine/pce_cd.cpp
deleted file mode 100644
index 50602b4e1cb..00000000000
--- a/src/mame/machine/pce_cd.cpp
+++ /dev/null
@@ -1,1661 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Wilbert Pol, Angelo Salese
-/************************************************************
-
-PC Engine CD HW notes:
-
-TODO:
-- Dragon Ball Z: ADPCM dies after the first upload;
-- Dragon Slayer - The Legend of Heroes: black screen; (actually timing/raster irq)
-- Mirai Shonen Conan: dies at new game selection; (actually timing/raster irq)
-- Snatcher: black screen after Konami logo, tries set up CD-DA
- while transferring data? (fixed)
-- Steam Heart's: needs transfer ready irq to get past the
- gameplay hang, don't know exactly when it should fire
-- Steam Heart's: bad ADPCM irq, dialogue is cutted due of it;
-- Unsafe on debugger access;
-
-=============================================================
-
-CD Interface Register 0x00 - CDC status
-x--- ---- busy signal
--x-- ---- request signal
----x ---- cd signal
----- x--- i/o signal
-
-CD Interface Register 0x03 - BRAM lock / CD status
--x-- ---- acknowledge signal
---x- ---- done signal
----x ---- bram signal
----- x--- ADPCM 2
----- -x-- ADPCM 1
----- --x- CDDA left/right speaker select
-
-CD Interface Register 0x05 - CD-DA Volume low 8-bit port
-
-CD Interface Register 0x06 - CD-DA Volume high 8-bit port
-
-CD Interface Register 0x07 - BRAM unlock / CD status
-x--- ---- Enables BRAM
-
-CD Interface Register 0x0c - ADPCM status
-x--- ---- ADPCM is reading data
----- x--- ADPCM playback (0) stopped (1) currently playing
----- -x-- pending ADPCM data write
----- ---x ADPCM playback (1) stopped (0) currently playing
-
-CD Interface Register 0x0d - ADPCM address control
-x--- ---- ADPCM reset
--x-- ---- ADPCM play
---x- ---- ADPCM repeat
----x ---- ADPCM set length
----- x--- ADPCM set read address
----- --xx ADPCM set write address
-(note: some games reads bit 5 and wants it to be low otherwise they hangs, surely NOT an ADPCM repeat flag read because it doesn't make sense)
-
-CD Interface Register 0x0e - ADPCM playback rate
-
-CD Interface Register 0x0f - ADPCM fade in/out register
----- xxxx command setting:
-0x00 ADPCM/CD-DA Fade-in
-0x01 CD-DA fade-in
-0x08 CD-DA fade-out (short) ADPCM fade-in
-0x09 CD-DA fade-out (long)
-0x0a ADPCM fade-out (long)
-0x0c CD-DA fade-out (short) ADPCM fade-in
-0x0d CD-DA fade-out (short)
-0x0e ADPCM fade-out (short)
-
-*************************************************************/
-
-#include "emu.h"
-#include "coreutil.h"
-#include "machine/pce_cd.h"
-
-
-#define PCE_CD_CLOCK 9216000
-
-
-// TODO: it's actually a common interface with PC-8801, find actual number part
-DEFINE_DEVICE_TYPE(PCE_CD, pce_cd_device, "pcecd", "PCE CD Add-on")
-
-// registers 9, e and f are known to be write only
-void pce_cd_device::regs_map(address_map &map)
-{
- map(0x00, 0x00).rw(FUNC(pce_cd_device::cdc_status_r), FUNC(pce_cd_device::cdc_status_w));
- map(0x01, 0x01).rw(FUNC(pce_cd_device::cdc_data_r), FUNC(pce_cd_device::cdc_data_w));
- map(0x02, 0x02).rw(FUNC(pce_cd_device::irq_mask_r), FUNC(pce_cd_device::irq_mask_w));
- map(0x03, 0x03).r(FUNC(pce_cd_device::irq_status_r));
- map(0x04, 0x04).rw(FUNC(pce_cd_device::cdc_reset_r), FUNC(pce_cd_device::cdc_reset_w));
- map(0x05, 0x06).r(FUNC(pce_cd_device::cdda_data_r));
- map(0x07, 0x07).rw(FUNC(pce_cd_device::bram_status_r), FUNC(pce_cd_device::bram_unlock_w));
- map(0x08, 0x08).rw(FUNC(pce_cd_device::cd_data_r), FUNC(pce_cd_device::adpcm_address_lo_w));
- map(0x09, 0x09).w(FUNC(pce_cd_device::adpcm_address_hi_w));
- map(0x0a, 0x0a).rw(FUNC(pce_cd_device::adpcm_data_r), FUNC(pce_cd_device::adpcm_data_w));
- map(0x0b, 0x0b).rw(FUNC(pce_cd_device::adpcm_dma_control_r), FUNC(pce_cd_device::adpcm_dma_control_w));
- map(0x0c, 0x0c).r(FUNC(pce_cd_device::adpcm_status_r));
- map(0x0d, 0x0d).rw(FUNC(pce_cd_device::adpcm_address_control_r), FUNC(pce_cd_device::adpcm_address_control_w));
- map(0x0e, 0x0e).w(FUNC(pce_cd_device::adpcm_playback_rate_w));
- map(0x0f, 0x0f).w(FUNC(pce_cd_device::fade_register_w));
-}
-
-pce_cd_device::pce_cd_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
- : device_t(mconfig, PCE_CD, tag, owner, clock)
- , device_memory_interface(mconfig, *this)
- , m_space_config("io", ENDIANNESS_LITTLE, 8, 4, 0, address_map_constructor(FUNC(pce_cd_device::regs_map), this))
- , m_maincpu(*this, ":maincpu")
- , m_msm(*this, "msm5205")
- , m_cdda(*this, "cdda")
- , m_nvram(*this, "bram")
- , m_cdrom(*this, "cdrom")
-{
-}
-
-device_memory_interface::space_config_vector pce_cd_device::memory_space_config() const
-{
- return space_config_vector {
- std::make_pair(AS_IO, &m_space_config)
- };
-}
-
-void pce_cd_device::device_start()
-{
- /* Initialize BRAM */
- m_bram = std::make_unique<uint8_t[]>(PCE_BRAM_SIZE * 2);
- memset(m_bram.get(), 0, PCE_BRAM_SIZE);
- memset(m_bram.get() + PCE_BRAM_SIZE, 0xff, PCE_BRAM_SIZE);
- m_bram_locked = 1;
-
- m_nvram->set_base(m_bram.get(), PCE_BRAM_SIZE);
-
- /* set up adpcm related things */
- m_adpcm_ram = make_unique_clear<uint8_t[]>(PCE_ADPCM_RAM_SIZE);
- m_adpcm_clock_divider = 1;
-
- /* Set up cd command buffer */
- m_command_buffer = make_unique_clear<uint8_t[]>(PCE_CD_COMMAND_BUFFER_SIZE);
- m_command_buffer_index = 0;
-
- /* Set up Arcade Card RAM buffer */
- m_acard_ram = make_unique_clear<uint8_t[]>(PCE_ACARD_RAM_SIZE);
-
- m_data_buffer = make_unique_clear<uint8_t[]>(8192);
- m_data_buffer_size = 0;
- m_data_buffer_index = 0;
-
- m_subcode_buffer = std::make_unique<uint8_t[]>(96);
-
- m_data_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pce_cd_device::data_timer_callback),this));
- m_data_timer->adjust(attotime::never);
- m_adpcm_dma_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pce_cd_device::adpcm_dma_timer_callback),this));
- m_adpcm_dma_timer->adjust(attotime::never);
-
- m_cdda_fadeout_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pce_cd_device::cdda_fadeout_callback),this));
- m_cdda_fadeout_timer->adjust(attotime::never);
- m_cdda_fadein_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pce_cd_device::cdda_fadein_callback),this));
- m_cdda_fadein_timer->adjust(attotime::never);
-
- m_adpcm_fadeout_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pce_cd_device::adpcm_fadeout_callback),this));
- m_adpcm_fadeout_timer->adjust(attotime::never);
- m_adpcm_fadein_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pce_cd_device::adpcm_fadein_callback),this));
- m_adpcm_fadein_timer->adjust(attotime::never);
-
- // m_cd_file pointer is setup at a later stage because it is still empty when this function is called
-
- // TODO: add proper restore for the cd data...
- save_pointer(NAME(m_bram), PCE_BRAM_SIZE * 2);
- save_pointer(NAME(m_adpcm_ram), PCE_ADPCM_RAM_SIZE);
- save_item(NAME(m_bram_locked));
- save_item(NAME(m_adpcm_read_ptr));
- save_item(NAME(m_adpcm_read_buf));
- save_item(NAME(m_adpcm_write_ptr));
- save_item(NAME(m_adpcm_write_buf));
- save_item(NAME(m_adpcm_length));
- save_item(NAME(m_adpcm_clock_divider));
- save_item(NAME(m_msm_start_addr));
- save_item(NAME(m_msm_end_addr));
- save_item(NAME(m_msm_half_addr));
- save_item(NAME(m_msm_nibble));
- save_item(NAME(m_msm_idle));
- save_item(NAME(m_msm_repeat));
- save_item(NAME(m_scsi_BSY));
- save_item(NAME(m_scsi_SEL));
- save_item(NAME(m_scsi_CD));
- save_item(NAME(m_scsi_IO));
- save_item(NAME(m_scsi_MSG));
- save_item(NAME(m_scsi_REQ));
- save_item(NAME(m_scsi_ACK));
- save_item(NAME(m_scsi_ATN));
- save_item(NAME(m_scsi_RST));
- save_item(NAME(m_scsi_last_RST));
- save_item(NAME(m_cd_motor_on));
- save_item(NAME(m_selected));
- save_pointer(NAME(m_command_buffer), PCE_CD_COMMAND_BUFFER_SIZE);
- save_item(NAME(m_command_buffer_index));
- save_item(NAME(m_status_sent));
- save_item(NAME(m_message_after_status));
- save_item(NAME(m_message_sent));
- save_pointer(NAME(m_data_buffer), 8192);
- save_item(NAME(m_data_buffer_size));
- save_item(NAME(m_data_buffer_index));
- save_item(NAME(m_data_transferred));
- save_pointer(NAME(m_acard_ram), PCE_ACARD_RAM_SIZE);
- save_item(NAME(m_acard_latch));
- save_item(NAME(m_acard_ctrl));
- save_item(NAME(m_acard_base_addr));
- save_item(NAME(m_acard_addr_offset));
- save_item(NAME(m_acard_addr_inc));
- save_item(NAME(m_acard_shift));
- save_item(NAME(m_acard_shift_reg));
- save_item(NAME(m_current_frame));
- save_item(NAME(m_end_frame));
- save_item(NAME(m_last_frame));
- save_item(NAME(m_cdda_status));
- save_item(NAME(m_cdda_play_mode));
- save_pointer(NAME(m_subcode_buffer), 96);
- save_item(NAME(m_end_mark));
- save_item(NAME(m_cdda_volume));
- save_item(NAME(m_adpcm_volume));
-
- // internal regs
- save_item(NAME(m_reset_reg));
- save_item(NAME(m_irq_mask));
- save_item(NAME(m_irq_status));
- save_item(NAME(m_cdc_status));
- save_item(NAME(m_cdc_data));
- save_item(NAME(m_bram_status));
- save_item(NAME(m_adpcm_status));
- save_item(NAME(m_adpcm_latch_address));
- save_item(NAME(m_adpcm_control));
- save_item(NAME(m_fade_reg));
- save_item(NAME(m_adpcm_dma_reg));
-}
-
-void pce_cd_device::device_reset()
-{
- m_adpcm_read_buf = 0;
- m_adpcm_write_buf = 0;
-
- // TODO: add CD-DA stop command here
- //m_cdda_status = PCE_CD_CDDA_OFF;
- //m_cdda->stop_audio();
-
- m_adpcm_status |= PCE_CD_ADPCM_STOP_FLAG;
- m_adpcm_status &= ~PCE_CD_ADPCM_PLAY_FLAG;
- //m_irq_status = (m_irq_status & ~0x0c) | (PCE_CD_SAMPLE_STOP_PLAY);
- m_msm_idle = 1;
-
- m_scsi_RST = 0;
- m_scsi_last_RST = 0;
- m_scsi_SEL = 0;
- m_scsi_BSY = 0;
- m_selected = 0;
- m_scsi_ATN = 0;
- m_end_mark = 0;
-}
-
-
-void pce_cd_device::late_setup()
-{
- // at device start, the cdrom is not 'ready' yet, so we postpone this part of the initialization at machine_start in the driver
- m_cd_file = m_cdrom->get_cdrom_file();
- if (m_cd_file)
- {
- m_toc = cdrom_get_toc(m_cd_file);
- m_cdda->set_cdrom(m_cd_file);
- m_last_frame = cdrom_get_track_start(m_cd_file, cdrom_get_last_track(m_cd_file) - 1);
- m_last_frame += m_toc->tracks[cdrom_get_last_track(m_cd_file) - 1].frames;
- m_end_frame = m_last_frame;
- }
-
- // MSM5205 might be initialized after PCE CD as well...
- m_msm->set_unscaled_clock((PCE_CD_CLOCK / 6) / m_adpcm_clock_divider);
-}
-
-void pce_cd_device::nvram_init(nvram_device &nvram, void *data, size_t size)
-{
- static const uint8_t init[8] = { 0x48, 0x55, 0x42, 0x4d, 0x00, 0xa0, 0x10, 0x80 };
-
- memset(data, 0x00, size);
- memcpy(data, init, sizeof(init));
-}
-
-// TODO: left and right speaker tags should be passed from the parent config, instead of using the hard-coded ones below!?!
-void pce_cd_device::device_add_mconfig(machine_config &config)
-{
- NVRAM(config, m_nvram).set_custom_handler(FUNC(pce_cd_device::nvram_init));
-
- CDROM(config, m_cdrom).set_interface("pce_cdrom");
-
- MSM5205(config, m_msm, PCE_CD_CLOCK / 6);
- m_msm->vck_legacy_callback().set(FUNC(pce_cd_device::msm5205_int)); /* interrupt function */
- m_msm->set_prescaler_selector(msm5205_device::S48_4B); /* 1/48 prescaler, 4bit data */
- m_msm->add_route(ALL_OUTPUTS, "^lspeaker", 0.50);
- m_msm->add_route(ALL_OUTPUTS, "^rspeaker", 0.50);
-
- CDDA(config, m_cdda);
- m_cdda->add_route(0, "^lspeaker", 1.00);
- m_cdda->add_route(1, "^rspeaker", 1.00);
-}
-
-void pce_cd_device::adpcm_stop(uint8_t irq_flag)
-{
- m_adpcm_status |= PCE_CD_ADPCM_STOP_FLAG;
- m_adpcm_status &= ~PCE_CD_ADPCM_PLAY_FLAG;
- //m_irq_status = (m_irq_status & ~0x0c) | (PCE_CD_SAMPLE_STOP_PLAY);
- if (irq_flag)
- set_irq_line(PCE_CD_IRQ_SAMPLE_FULL_PLAY, ASSERT_LINE);
- m_adpcm_control &= ~0x60;
- m_msm_idle = 1;
-}
-
-void pce_cd_device::adpcm_play()
-{
- m_adpcm_status &= ~PCE_CD_ADPCM_STOP_FLAG;
- m_adpcm_status |= PCE_CD_ADPCM_PLAY_FLAG;
- set_irq_line(PCE_CD_IRQ_SAMPLE_FULL_PLAY, CLEAR_LINE);
- m_irq_status = (m_irq_status & ~0x0c);
- m_msm_idle = 0;
-}
-
-
-/* Callback for new data from the MSM5205.
- The PCE cd unit actually divides the clock signal supplied to
- the MSM5205. Currently we can only use static clocks for the
- MSM5205.
- */
-WRITE_LINE_MEMBER( pce_cd_device::msm5205_int )
-{
- uint8_t msm_data;
-
- // popmessage("%08x %08x %08x %02x %02x",m_msm_start_addr,m_msm_end_addr,m_msm_half_addr,m_adpcm_status,m_adpcm_control);
-
- if (m_msm_idle)
- return;
-
- /* Supply new ADPCM data */
- msm_data = (m_msm_nibble) ? (m_adpcm_ram[m_msm_start_addr] & 0x0f) : ((m_adpcm_ram[m_msm_start_addr] & 0xf0) >> 4);
-
- m_msm->write_data(msm_data);
- m_msm_nibble ^= 1;
-
- if (m_msm_nibble == 0)
- {
- m_msm_start_addr++;
-
- if (m_msm_start_addr == m_msm_half_addr)
- {
- //set_irq_line(PCE_CD_IRQ_SAMPLE_FULL_PLAY, CLEAR_LINE);
- //set_irq_line(PCE_CD_IRQ_SAMPLE_HALF_PLAY, ASSERT_LINE);
- }
-
- if (m_msm_start_addr > m_msm_end_addr)
- {
- //set_irq_line(PCE_CD_IRQ_SAMPLE_HALF_PLAY, CLEAR_LINE);
- //set_irq_line(PCE_CD_IRQ_SAMPLE_FULL_PLAY, CLEAR_LINE);
- adpcm_stop(1);
- m_msm->reset_w(1);
- }
- }
-}
-
-
-
-#define SCSI_STATUS_OK 0x00
-#define SCSI_CHECK_CONDITION 0x02
-
-void pce_cd_device::reply_status_byte(uint8_t status)
-{
- logerror("Setting CD in reply_status_byte\n");
- m_scsi_CD = m_scsi_IO = m_scsi_REQ = 1;
- m_scsi_MSG = 0;
- m_message_after_status = 1;
- m_status_sent = m_message_sent = 0;
-
- if (status == SCSI_STATUS_OK)
- {
- m_cdc_data = 0x00;
- }
- else
- {
- m_cdc_data = 0x01;
- }
-}
-
-/* 0x00 - TEST UNIT READY */
-void pce_cd_device::test_unit_ready()
-{
- logerror("test unit ready\n");
- if (m_cd_file)
- {
- logerror("Sending STATUS_OK status\n");
- reply_status_byte(SCSI_STATUS_OK);
- }
- else
- {
- logerror("Sending CHECK_CONDITION status\n");
- reply_status_byte(SCSI_CHECK_CONDITION);
- }
-}
-
-/* 0x08 - READ (6) */
-void pce_cd_device::read_6()
-{
- uint32_t frame = ((m_command_buffer[1] & 0x1f) << 16) | (m_command_buffer[2] << 8) | m_command_buffer[3];
- uint32_t frame_count = m_command_buffer[4];
- printf("%08x %08x\n",frame,frame_count);
-
- /* Check for presence of a CD */
- if (!m_cd_file)
- {
- reply_status_byte(SCSI_CHECK_CONDITION);
- return;
- }
-
- if (m_cdda_status != PCE_CD_CDDA_OFF)
- {
- m_cdda_status = PCE_CD_CDDA_OFF;
- m_cdda->stop_audio();
- m_end_mark = 0;
- }
-
- m_current_frame = frame;
- m_end_frame = frame + frame_count;
-
- if (frame_count == 0)
- {
- /* Star Breaker uses this */
- popmessage("Read Sector frame count == 0, contact MESSdev");
- reply_status_byte(SCSI_STATUS_OK);
- }
- else
- {
- m_data_timer->adjust(attotime::from_hz(PCE_CD_DATA_FRAMES_PER_SECOND), 0, attotime::from_hz(PCE_CD_DATA_FRAMES_PER_SECOND));
- }
-
- /* TODO: correct place? */
- set_irq_line(PCE_CD_IRQ_TRANSFER_READY, ASSERT_LINE);
-}
-
-/* 0xD8 - SET AUDIO PLAYBACK START POSITION (NEC) */
-void pce_cd_device::nec_set_audio_start_position()
-{
- uint32_t frame = 0;
-
- if (!m_cd_file)
- {
- /* Throw some error here */
- reply_status_byte(SCSI_CHECK_CONDITION);
- return;
- }
-
- switch (m_command_buffer[9] & 0xC0)
- {
- case 0x00:
- popmessage("CD-DA set start mode 0x00, contact MESSdev");
- frame = (m_command_buffer[3] << 16) | (m_command_buffer[4] << 8) | m_command_buffer[5];
- break;
- case 0x40:
- {
- uint8_t m,s,f;
-
- m = bcd_2_dec(m_command_buffer[2]);
- s = bcd_2_dec(m_command_buffer[3]);
- f = bcd_2_dec(m_command_buffer[4]);
-
- frame = f + 75 * (s + m * 60);
- // PCE tries to be clever here and set (start of track + track pregap size) to skip the pregap
- // (I guess it wants the TOC to have the real start sector for data tracks and the start of the pregap for audio?)
- frame -= m_toc->tracks[cdrom_get_track(m_cd_file, frame)].pregap;
- break;
- }
- case 0x80:
- frame = m_toc->tracks[ bcd_2_dec(m_command_buffer[2]) - 1 ].logframeofs;
- break;
- default:
- popmessage("CD-DA set start mode 0xc0, contact MESSdev");
- //assert(nullptr == nec_set_audio_start_position);
- break;
- }
-
- m_current_frame = frame;
-
- m_cdda_status = PCE_CD_CDDA_PAUSED;
-
- // old code for reference, seems unlikely that this puts status in standby (and breaks Snatcher at the title screen)
-// if (m_cdda_status == PCE_CD_CDDA_PAUSED)
-// {
-// m_cdda_status = PCE_CD_CDDA_OFF;
-// m_cdda->stop_audio();
-// m_end_frame = m_last_frame;
-// m_end_mark = 0;
-// }
-// else
- {
- if (m_command_buffer[1] & 0x03)
- {
- //m_cdda_status = PCE_CD_CDDA_PLAYING;
- m_end_frame = m_last_frame; //get the end of the CD
- m_cdda->start_audio(m_current_frame, m_end_frame - m_current_frame);
- m_cdda_play_mode = (m_command_buffer[1] & 0x02) ? 2 : 3; // mode 2 sets IRQ at end
- m_end_mark = (m_command_buffer[1] & 0x02) ? 1 : 0;
- }
- else
- {
- //m_cdda_status = PCE_CD_CDDA_PLAYING;
- m_end_frame = m_toc->tracks[ cdrom_get_track(m_cd_file, m_current_frame) + 1 ].logframeofs; //get the end of THIS track
- m_cdda->start_audio(m_current_frame, m_end_frame - m_current_frame);
- m_end_mark = 0;
- m_cdda_play_mode = 3;
- }
- }
-
- reply_status_byte(SCSI_STATUS_OK);
- set_irq_line(PCE_CD_IRQ_TRANSFER_DONE, ASSERT_LINE);
-}
-
-/* 0xD9 - SET AUDIO PLAYBACK END POSITION (NEC) */
-void pce_cd_device::nec_set_audio_stop_position()
-{
- uint32_t frame = 0;
-
- if (!m_cd_file)
- {
- /* Throw some error here */
- reply_status_byte(SCSI_CHECK_CONDITION);
- return;
- }
-
- switch (m_command_buffer[9] & 0xC0)
- {
- case 0x00:
- popmessage("CD-DA set end mode 0x00, contact MESSdev");
- frame = (m_command_buffer[3] << 16) | (m_command_buffer[4] << 8) | m_command_buffer[5];
- break;
- case 0x40:
- {
- uint8_t m,s,f;
-
- m = bcd_2_dec(m_command_buffer[2]);
- s = bcd_2_dec(m_command_buffer[3]);
- f = bcd_2_dec(m_command_buffer[4]);
-
- frame = f + 75 * (s + m * 60);
- // if (frame >= 525) // TODO: seven seconds gap? O_o
- // frame -= 525;
- break;
- }
- case 0x80:
- frame = m_toc->tracks[ bcd_2_dec(m_command_buffer[2]) - 1 ].logframeofs;
- break;
- default:
- popmessage("CD-DA set end mode 0xc0, contact MESSdev");
- //assert(nullptr == nec_set_audio_start_position);
- break;
- }
-
- m_end_frame = frame;
- m_cdda_play_mode = m_command_buffer[1] & 0x03;
-
- if (m_cdda_play_mode)
- {
- if (m_cdda_status == PCE_CD_CDDA_PAUSED)
- {
- m_cdda->pause_audio(0);
- }
- else
- {
- //printf("%08x %08x\n",m_current_frame,m_end_frame - m_current_frame);
- m_cdda->start_audio(m_current_frame, m_end_frame - m_current_frame);
- m_end_mark = 1;
- }
- m_cdda_status = PCE_CD_CDDA_PLAYING;
- }
- else
- {
- m_cdda_status = PCE_CD_CDDA_OFF;
- m_cdda->stop_audio();
- m_end_frame = m_last_frame;
- m_end_mark = 0;
-// assert(nullptr == nec_set_audio_stop_position);
- }
-
- reply_status_byte(SCSI_STATUS_OK);
- set_irq_line(PCE_CD_IRQ_TRANSFER_DONE, ASSERT_LINE);
-}
-
-/* 0xDA - PAUSE (NEC) */
-void pce_cd_device::nec_pause()
-{
- /* If no cd mounted throw an error */
- if (!m_cd_file)
- {
- reply_status_byte(SCSI_CHECK_CONDITION);
- return;
- }
-
- /* If there was no cdda playing, throw an error */
- if (m_cdda_status == PCE_CD_CDDA_OFF)
- {
- reply_status_byte(SCSI_CHECK_CONDITION);
- return;
- }
-
- m_cdda_status = PCE_CD_CDDA_PAUSED;
- m_current_frame = m_cdda->get_audio_lba();
- m_cdda->pause_audio(1);
- reply_status_byte(SCSI_STATUS_OK);
-}
-
-/* 0xDD - READ SUBCHANNEL Q (NEC) */
-void pce_cd_device::nec_get_subq()
-{
- /* WP - I do not have access to chds with subchannel information yet, so I'm faking something here */
- uint32_t msf_abs, msf_rel, track, frame;
-
- if (!m_cd_file)
- {
- /* Throw some error here */
- reply_status_byte(SCSI_CHECK_CONDITION);
- return;
- }
-
- frame = m_current_frame;
-
- switch (m_cdda_status)
- {
- case PCE_CD_CDDA_PAUSED:
- m_data_buffer[0] = 2;
- frame = m_cdda->get_audio_lba();
- break;
- case PCE_CD_CDDA_PLAYING:
- m_data_buffer[0] = 0;
- frame = m_cdda->get_audio_lba();
- break;
- default:
- m_data_buffer[0] = 3;
- break;
- }
-
- msf_abs = lba_to_msf_alt(frame);
- track = cdrom_get_track(m_cd_file, frame);
- msf_rel = lba_to_msf_alt(frame - cdrom_get_track_start(m_cd_file, track));
-
- m_data_buffer[1] = 0x01 | ((cdrom_get_track_type(m_cd_file, cdrom_get_track(m_cd_file, track+1)) == CD_TRACK_AUDIO) ? 0x00 : 0x40);
- m_data_buffer[2] = dec_2_bcd(track+1); /* track */
- m_data_buffer[3] = 1; /* index */
- m_data_buffer[4] = dec_2_bcd((msf_rel >> 16) & 0xFF);/* M (relative) */
- m_data_buffer[5] = dec_2_bcd((msf_rel >> 8) & 0xFF); /* S (relative) */
- m_data_buffer[6] = dec_2_bcd(msf_rel & 0xFF); /* F (relative) */
- m_data_buffer[7] = dec_2_bcd((msf_abs >> 16) & 0xFF);/* M (absolute) */
- m_data_buffer[8] = dec_2_bcd((msf_abs >> 8) & 0xFF); /* S (absolute) */
- m_data_buffer[9] = dec_2_bcd(msf_abs & 0xFF); /* F (absolute) */
- m_data_buffer_size = 10;
-
- m_data_buffer_index = 0;
- m_data_transferred = 1;
- m_scsi_IO = 1;
- m_scsi_CD = 0;
-}
-
-/* 0xDE - GET DIR INFO (NEC) */
-void pce_cd_device::nec_get_dir_info()
-{
- uint32_t frame, msf, track = 0;
- const cdrom_toc *toc;
- logerror("nec get dir info\n");
-
- if (!m_cd_file)
- {
- /* Throw some error here */
- reply_status_byte(SCSI_CHECK_CONDITION);
- }
-
- toc = cdrom_get_toc(m_cd_file);
-
- switch (m_command_buffer[1])
- {
- case 0x00: /* Get first and last track numbers */
- m_data_buffer[0] = dec_2_bcd(1);
- m_data_buffer[1] = dec_2_bcd(toc->numtrks);
- m_data_buffer_size = 2;
- break;
- case 0x01: /* Get total disk size in MSF format */
- frame = toc->tracks[toc->numtrks-1].logframeofs;
- frame += toc->tracks[toc->numtrks-1].frames;
- msf = lba_to_msf(frame + 150);
-
- m_data_buffer[0] = (msf >> 16) & 0xFF; /* M */
- m_data_buffer[1] = (msf >> 8) & 0xFF; /* S */
- m_data_buffer[2] = msf & 0xFF; /* F */
- m_data_buffer_size = 3;
- break;
- case 0x02: /* Get track information */
- if (m_command_buffer[2] == 0xAA)
- {
- frame = toc->tracks[toc->numtrks-1].logframeofs;
- frame += toc->tracks[toc->numtrks-1].frames;
- m_data_buffer[3] = 0x04; /* correct? */
- } else
- {
- track = std::max(bcd_2_dec(m_command_buffer[2]), 1U);
- frame = toc->tracks[track-1].logframeofs;
- // PCE wants the start sector for data tracks to *not* include the pregap
- if (toc->tracks[track-1].trktype != CD_TRACK_AUDIO)
- {
- frame += toc->tracks[track-1].pregap;
- }
- m_data_buffer[3] = (toc->tracks[track-1].trktype == CD_TRACK_AUDIO) ? 0x00 : 0x04;
- }
- logerror("track = %d, frame = %d\n", track, frame);
- msf = lba_to_msf(frame + 150);
- m_data_buffer[0] = (msf >> 16) & 0xFF; /* M */
- m_data_buffer[1] = (msf >> 8) & 0xFF; /* S */
- m_data_buffer[2] = msf & 0xFF; /* F */
- m_data_buffer_size = 4;
- break;
- default:
-// assert(pce_cd_nec_get_dir_info == nullptr); // Not implemented yet
- break;
- }
-
- m_data_buffer_index = 0;
- m_data_transferred = 1;
- m_scsi_IO = 1;
- m_scsi_CD = 0;
-}
-
-void pce_cd_device::end_of_list()
-{
- reply_status_byte(SCSI_CHECK_CONDITION);
-}
-
-typedef void (pce_cd_device::*command_handler_func)();
-
-void pce_cd_device::handle_data_output()
-{
- static const struct {
- uint8_t command_byte;
- uint8_t command_size;
- command_handler_func command_handler;
- } pce_cd_commands[] = {
- { 0x00, 6, &pce_cd_device::test_unit_ready }, /* TEST UNIT READY */
- { 0x08, 6, &pce_cd_device::read_6 }, /* READ (6) */
- { 0xD8,10, &pce_cd_device::nec_set_audio_start_position }, /* NEC SET AUDIO PLAYBACK START POSITION */
- { 0xD9,10, &pce_cd_device::nec_set_audio_stop_position }, /* NEC SET AUDIO PLAYBACK END POSITION */
- { 0xDA,10, &pce_cd_device::nec_pause }, /* NEC PAUSE */
- { 0xDD,10, &pce_cd_device::nec_get_subq }, /* NEC GET SUBCHANNEL Q */
- { 0xDE,10, &pce_cd_device::nec_get_dir_info }, /* NEC GET DIR INFO */
- { 0xFF, 1, &pce_cd_device::end_of_list } /* end of list marker */
- };
-
- if (m_scsi_REQ && m_scsi_ACK)
- {
- /* Command byte received */
- logerror("Command byte $%02X received\n", m_cdc_data);
-
- /* Check for buffer overflow */
- assert(m_command_buffer_index < PCE_CD_COMMAND_BUFFER_SIZE);
-
- m_command_buffer[m_command_buffer_index] = m_cdc_data;
- m_command_buffer_index++;
- m_scsi_REQ = 0;
- }
-
- if (! m_scsi_REQ && ! m_scsi_ACK && m_command_buffer_index)
- {
- int i = 0;
-
- logerror("Check if command done\n");
-
- for(i = 0; m_command_buffer[0] > pce_cd_commands[i].command_byte; i++);
-
- /* Check for unknown commands */
- if (m_command_buffer[0] != pce_cd_commands[i].command_byte)
- {
- logerror("Unrecognized command: %02X\n", m_command_buffer[0]);
- if (m_command_buffer[0] == 0x03)
- popmessage("CD command 0x03 issued (Request Sense), contact MESSdev");
- }
- assert(m_command_buffer[0] == pce_cd_commands[i].command_byte);
-
- if (m_command_buffer_index == pce_cd_commands[i].command_size)
- {
- //printf("%02x command issued\n",m_command_buffer[0]);
- (this->*pce_cd_commands[i].command_handler)();
- m_command_buffer_index = 0;
- }
- else
- {
- m_scsi_REQ = 1;
- }
- }
-}
-
-void pce_cd_device::handle_data_input()
-{
- if (m_scsi_CD)
- {
- /* Command / Status byte */
- if (m_scsi_REQ && m_scsi_ACK)
- {
- logerror("status sent\n");
- m_scsi_REQ = 0;
- m_status_sent = 1;
- }
-
- if (! m_scsi_REQ && ! m_scsi_ACK && m_status_sent)
- {
- m_status_sent = 0;
- if (m_message_after_status)
- {
- logerror("message after status\n");
- m_message_after_status = 0;
- m_scsi_MSG = m_scsi_REQ = 1;
- m_cdc_data = 0;
- }
- }
- }
- else
- {
- /* Data */
- if (m_scsi_REQ && m_scsi_ACK)
- {
- m_scsi_REQ = 0;
- }
-
- if (! m_scsi_REQ && ! m_scsi_ACK)
- {
- if (m_data_buffer_index == m_data_buffer_size)
- {
- set_irq_line(PCE_CD_IRQ_TRANSFER_READY, CLEAR_LINE);
- if (m_data_transferred)
- {
- m_data_transferred = 0;
- reply_status_byte(SCSI_STATUS_OK);
- set_irq_line(PCE_CD_IRQ_TRANSFER_DONE, ASSERT_LINE);
- }
- }
- else
- {
- logerror("Transfer byte %02x from offset %d %d\n",m_data_buffer[m_data_buffer_index] , m_data_buffer_index, m_current_frame);
- m_cdc_data = m_data_buffer[m_data_buffer_index];
- m_data_buffer_index++;
- m_scsi_REQ = 1;
- }
- }
- }
-}
-
-void pce_cd_device::handle_message_output()
-{
- if (m_scsi_REQ && m_scsi_ACK)
- m_scsi_REQ = 0;
-}
-
-void pce_cd_device::handle_message_input()
-{
- if (m_scsi_REQ && m_scsi_ACK)
- {
- m_scsi_REQ = 0;
- m_message_sent = 1;
- }
-
- if (! m_scsi_REQ && ! m_scsi_ACK && m_message_sent)
- {
- m_message_sent = 0;
- m_scsi_BSY = 0;
- }
-}
-
-/* Update internal CD statuses */
-void pce_cd_device::update()
-{
- /* Check for reset of CD unit */
- if (m_scsi_RST != m_scsi_last_RST)
- {
- if (m_scsi_RST)
- {
- logerror("Performing CD reset\n");
- /* Reset internal data */
- m_scsi_BSY = m_scsi_SEL = m_scsi_CD = m_scsi_IO = 0;
- m_scsi_MSG = m_scsi_REQ = m_scsi_ATN = 0;
- m_cd_motor_on = 0;
- m_selected = 0;
- m_cdda_status = PCE_CD_CDDA_OFF;
- m_cdda->stop_audio();
- m_adpcm_dma_timer->adjust(attotime::never); // stop ADPCM DMA here
- }
- m_scsi_last_RST = m_scsi_RST;
- }
-
- /* Check if bus can be freed */
- if (! m_scsi_SEL && ! m_scsi_BSY && m_selected)
- {
- logerror("freeing bus\n");
- m_selected = 0;
- m_scsi_CD = m_scsi_MSG = m_scsi_IO = m_scsi_REQ = 0;
- set_irq_line(PCE_CD_IRQ_TRANSFER_DONE, CLEAR_LINE);
- }
-
- /* Select the CD device */
- if (m_scsi_SEL)
- {
- if (! m_selected)
- {
- m_selected = 1;
- logerror("Setting CD in device selection\n");
- m_scsi_BSY = m_scsi_REQ = m_scsi_CD = 1;
- m_scsi_MSG = m_scsi_IO = 0;
- }
- }
-
- if (m_scsi_ATN)
- {
- }
- else
- {
- /* Check for data and message phases */
- if (m_scsi_BSY)
- {
- if (m_scsi_MSG)
- {
- /* message phase */
- if (m_scsi_IO)
- {
- handle_message_input();
- }
- else
- {
- handle_message_output();
- }
- }
- else
- {
- /* data phase */
- if (m_scsi_IO)
- {
- /* Reading data from target */
- handle_data_input();
- }
- else
- {
- /* Sending data to target */
- handle_data_output();
- }
- }
- }
- }
-
- /* FIXME: presumably CD-DA needs an irq interface for this */
- if (m_cdda->audio_ended() && m_end_mark == 1)
- {
- switch (m_cdda_play_mode & 3)
- {
- case 1: m_cdda->start_audio(m_current_frame, m_end_frame - m_current_frame); m_end_mark = 1; break; //play with repeat
- case 2: set_irq_line(PCE_CD_IRQ_TRANSFER_DONE, ASSERT_LINE); m_end_mark = 0; break; //irq when finished
- case 3: m_end_mark = 0; break; //play without repeat
- }
- }
-}
-
-void pce_cd_device::set_irq_line(int num, int state)
-{
- if (state == ASSERT_LINE)
- m_irq_status |= num;
- else
- m_irq_status &= ~num;
-
- if (m_irq_mask & m_irq_status & 0x7c)
- {
- //printf("IRQ PEND = %02x MASK = %02x IRQ ENABLE %02X\n",m_irq_mask & m_irq_status & 0x7c,m_irq_mask & 0x7c,m_irq_status & 0x7c);
- m_maincpu->set_input_line(1, ASSERT_LINE);
- }
- else
- {
- m_maincpu->set_input_line(1, CLEAR_LINE);
- }
-}
-
-TIMER_CALLBACK_MEMBER(pce_cd_device::data_timer_callback)
-{
- if (m_data_buffer_index == m_data_buffer_size)
- {
- /* Read next data sector */
- logerror("read sector %d\n", m_current_frame);
- if (! cdrom_read_data(m_cd_file, m_current_frame, m_data_buffer.get(), CD_TRACK_MODE1))
- {
- logerror("Mode1 CD read failed for frame #%d\n", m_current_frame);
- }
- else
- {
- logerror("Successfully read mode1 frame #%d\n", m_current_frame);
- }
-
- m_data_buffer_index = 0;
- m_data_buffer_size = 2048;
- m_current_frame++;
-
- m_scsi_IO = 1;
- m_scsi_CD = 0;
-
- if (m_current_frame == m_end_frame)
- {
- /* We are done, disable the timer */
- logerror("Last frame read from CD\n");
- m_data_transferred = 1;
- // data transfer is done, issue a pause
- m_cdda_status = PCE_CD_CDDA_PAUSED;
- m_data_timer->adjust(attotime::never);
- }
- else
- {
- m_data_transferred = 0;
- }
- }
-}
-
-WRITE8_MEMBER(pce_cd_device::bram_w)
-{
- if (!m_bram_locked)
- {
- m_bram[offset & (PCE_BRAM_SIZE - 1)] = data;
- }
-}
-
-READ8_MEMBER(pce_cd_device::bram_r)
-{
- return m_bram[(offset & (PCE_BRAM_SIZE - 1)) + m_bram_locked * PCE_BRAM_SIZE];
-}
-
-void pce_cd_device::set_adpcm_ram_byte(uint8_t val)
-{
- if (m_adpcm_write_buf > 0)
- {
- m_adpcm_write_buf--;
- }
- else
- {
- m_adpcm_ram[m_adpcm_write_ptr] = val;
- m_adpcm_write_ptr = ((m_adpcm_write_ptr + 1) & 0xffff);
- //TODO: length + 1
- }
-}
-
-TIMER_CALLBACK_MEMBER(pce_cd_device::cdda_fadeout_callback)
-{
- m_cdda_volume -= 0.1;
-
- if (m_cdda_volume <= 0)
- {
- m_cdda_volume = 0.0;
- m_cdda_fadeout_timer->adjust(attotime::never);
- }
- else
- {
- m_cdda_fadeout_timer->adjust(attotime::from_usec(param), param);
- }
-
- m_cdda->set_output_gain(ALL_OUTPUTS, m_cdda_volume / 100.0);
-}
-
-TIMER_CALLBACK_MEMBER(pce_cd_device::cdda_fadein_callback)
-{
- m_cdda_volume += 0.1;
-
- if (m_cdda_volume >= 100.0)
- {
- m_cdda_volume = 100.0;
- m_cdda_fadein_timer->adjust(attotime::never);
- }
- else
- {
- m_cdda_fadein_timer->adjust(attotime::from_usec(param), param);
- }
-
- m_cdda->set_output_gain(ALL_OUTPUTS, m_cdda_volume / 100.0);
-}
-
-TIMER_CALLBACK_MEMBER(pce_cd_device::adpcm_fadeout_callback)
-{
- m_adpcm_volume -= 0.1;
-
- if (m_adpcm_volume <= 0)
- {
- m_adpcm_volume = 0.0;
- m_adpcm_fadeout_timer->adjust(attotime::never);
- }
- else
- {
- m_adpcm_fadeout_timer->adjust(attotime::from_usec(param), param);
- }
-
- m_msm->set_output_gain(ALL_OUTPUTS, m_adpcm_volume / 100.0);
-}
-
-TIMER_CALLBACK_MEMBER(pce_cd_device::adpcm_fadein_callback)
-{
- m_adpcm_volume += 0.1;
-
- if (m_adpcm_volume >= 100.0)
- {
- m_adpcm_volume = 100.0;
- m_adpcm_fadein_timer->adjust(attotime::never);
- }
- else
- {
- m_adpcm_fadein_timer->adjust(attotime::from_usec(param), param);
- }
-
- m_msm->set_output_gain(ALL_OUTPUTS, m_adpcm_volume / 100.0);
-}
-
-/*
- *
- * Register section
- *
- */
-
-// CD Interface Register 0x00 - CDC status
-// x--- ---- busy signal
-// -x-- ---- request signal
-// ---x ---- cd signal
-// ---- x--- i/o signal
-READ8_MEMBER(pce_cd_device::cdc_status_r)
-{
- uint8_t res = (m_cdc_status & 7);
- res |= m_scsi_BSY ? 0x80 : 0;
- res |= m_scsi_REQ ? 0x40 : 0;
- res |= m_scsi_MSG ? 0x20 : 0;
- res |= m_scsi_CD ? 0x10 : 0;
- res |= m_scsi_IO ? 0x08 : 0;
- return res;
-}
-
-WRITE8_MEMBER(pce_cd_device::cdc_status_w)
-{
- /* select device (which bits??) */
- m_scsi_SEL = 1;
- update();
- m_scsi_SEL = 0;
- m_adpcm_dma_timer->adjust(attotime::never); // stop ADPCM DMA here
- /* any write here clears CD transfer irqs */
- set_irq_line(0x70, CLEAR_LINE);
- m_cdc_status = data;
-}
-
-// CD Interface Register 0x01 - CDC command / status / data
-READ8_MEMBER(pce_cd_device::cdc_data_r)
-{
- return m_cdc_data;
-}
-
-WRITE8_MEMBER(pce_cd_device::cdc_data_w)
-{
- m_cdc_data = data;
-}
-
-
-// CD Interface Register 0x02 - IRQ Mask and CD control
-// x--- ---- to SCSI ACK
-// -x-- ---- transfer ready irq
-// --x- ---- transfer done irq
-// ---x ---- BRAM irq?
-// ---- x--- ADPCM FULL irq
-// ---- -x-- ADPCM HALF irq
-READ8_MEMBER(pce_cd_device::irq_mask_r)
-{
- return m_irq_mask;
-}
-
-WRITE8_MEMBER(pce_cd_device::irq_mask_w)
-{
- m_scsi_ACK = data & 0x80;
- m_irq_mask = data;
- set_irq_line(0, 0);
-}
-
-// CD Interface Register 0x03 - BRAM lock / CD status (read only)
-// -x-- ---- acknowledge signal
-// --x- ---- done signal
-// ---x ---- bram signal
-// ---- x--- ADPCM 2
-// ---- -x-- ADPCM 1
-// ---- --x- CDDA left/right speaker select
-READ8_MEMBER(pce_cd_device::irq_status_r)
-{
- uint8_t res = m_irq_status & 0x6e;
- // a read here locks the BRAM
- m_bram_locked = 1;
- res |= (m_cd_motor_on ? 0x10 : 0);
- // TODO: gross hack, needs actual behaviour of CDDA data select
- m_irq_status ^= 0x02;
- return res;
-}
-
-// CD Interface Register 0x04 - CD reset
-// ---- --x- to SCSI RST
-READ8_MEMBER(pce_cd_device::cdc_reset_r)
-{
- return m_reset_reg;
-}
-
-WRITE8_MEMBER(pce_cd_device::cdc_reset_w)
-{
- m_scsi_RST = data & 0x02;
- m_reset_reg = data;
-}
-
-// CD Interface Register 0x05 - CD-DA Volume low 8-bit port
-// CD Interface Register 0x06 - CD-DA Volume high 8-bit port
-// TODO: port 5 also converts?
-READ8_MEMBER(pce_cd_device::cdda_data_r)
-{
- uint8_t port_shift = offset ? 0 : 8;
-
- return ((m_cdda->get_channel_volume(m_irq_status & 2) ? 0 : 1) >> port_shift) & 0xff;
-}
-
-// CD Interface Register 0x07 - BRAM unlock / CD status
-// x--- ---- Enables BRAM
-READ8_MEMBER(pce_cd_device::bram_status_r)
-{
- uint8_t res = (m_bram_locked ? (m_bram_status & 0x7f) : (m_bram_status | 0x80));
- return res;
-}
-
-WRITE8_MEMBER(pce_cd_device::bram_unlock_w)
-{
- if (data & 0x80)
- m_bram_locked = 0;
- m_bram_status = data;
-}
-
-// CD Interface Register 0x08 - CD data (R) / ADPCM address low (W)
-READ8_MEMBER(pce_cd_device::cd_data_r)
-{
- return get_cd_data_byte();
-}
-
-WRITE8_MEMBER(pce_cd_device::adpcm_address_lo_w)
-{
- m_adpcm_latch_address = (data & 0xff) | (m_adpcm_latch_address & 0xff00);
-}
-
-// CD Interface Register 0x09 - ADPCM address high (W)
-WRITE8_MEMBER(pce_cd_device::adpcm_address_hi_w)
-{
- m_adpcm_latch_address = (data << 8) | (m_adpcm_latch_address & 0xff);
-}
-
-// CD interface Register 0x0a - ADPCM RAM data port
-READ8_MEMBER(pce_cd_device::adpcm_data_r)
-{
- return get_adpcm_ram_byte();
-}
-
-WRITE8_MEMBER(pce_cd_device::adpcm_data_w)
-{
- set_adpcm_ram_byte(data);
-}
-
-// CD interface Register 0x0b - ADPCM DMA control
-READ8_MEMBER(pce_cd_device::adpcm_dma_control_r)
-{
- return m_adpcm_dma_reg;
-}
-
-WRITE8_MEMBER(pce_cd_device::adpcm_dma_control_w)
-{
- if (data & 3)
- {
- m_adpcm_dma_timer->adjust(attotime::from_hz(PCE_CD_DATA_FRAMES_PER_SECOND * 2048), 0, attotime::from_hz(PCE_CD_DATA_FRAMES_PER_SECOND * 2048));
- m_adpcm_status |= 4;
- }
- m_adpcm_dma_reg = data;
-}
-
-// CD Interface Register 0x0c - ADPCM status
-// x--- ---- ADPCM is reading data
-// ---- x--- ADPCM playback (0) stopped (1) currently playing
-// ---- -x-- pending ADPCM data write
-// ---- ---x ADPCM playback (1) stopped (0) currently playing
-READ8_MEMBER(pce_cd_device::adpcm_status_r)
-{
- return m_adpcm_status;
-}
-
-// CD Interface Register 0x0d - ADPCM address control
-// x--- ---- ADPCM reset
-// -x-- ---- ADPCM play
-// --x- ---- ADPCM repeat
-// ---x ---- ADPCM set length
-// ---- x--- ADPCM set read address
-// ---- --xx ADPCM set write address
-// TODO: some games reads bit 5 and wants it to be low otherwise they hangs,
-// how that can cope with "repeat"?
-READ8_MEMBER(pce_cd_device::adpcm_address_control_r)
-{
- return m_adpcm_control;
-}
-
-WRITE8_MEMBER(pce_cd_device::adpcm_address_control_w)
-{
- if ((m_adpcm_control & 0x80) && !(data & 0x80)) // ADPCM reset
- {
- /* Reset ADPCM hardware */
- m_adpcm_read_ptr = 0;
- m_adpcm_write_ptr = 0;
- m_msm_start_addr = 0;
- m_msm_end_addr = 0;
- m_msm_half_addr = 0;
- m_msm_nibble = 0;
- adpcm_stop(0);
- m_msm->reset_w(1);
- }
-
- if ((data & 0x40) && ((m_adpcm_control & 0x40) == 0)) // ADPCM play
- {
- m_msm_start_addr = (m_adpcm_read_ptr);
- m_msm_end_addr = (m_adpcm_read_ptr + m_adpcm_length) & 0xffff;
- m_msm_half_addr = (m_adpcm_read_ptr + (m_adpcm_length / 2)) & 0xffff;
- m_msm_nibble = 0;
- adpcm_play();
- m_msm->reset_w(0);
-
- //popmessage("%08x %08x",m_adpcm_read_ptr,m_adpcm_length);
- }
- else if ((data & 0x40) == 0)
- {
- /* used by Buster Bros to cancel an in-flight sample */
- adpcm_stop(0);
- m_msm->reset_w(1);
- }
-
- m_msm_repeat = BIT(data, 5);
-
- if (data & 0x10) //ADPCM set length
- {
- m_adpcm_length = m_adpcm_latch_address;
- }
- if (data & 0x08) //ADPCM set read address
- {
- m_adpcm_read_ptr = m_adpcm_latch_address;
- m_adpcm_read_buf = 2;
- }
- if ((data & 0x02) == 0x02) //ADPCM set write address
- {
- m_adpcm_write_ptr = m_adpcm_latch_address;
- m_adpcm_write_buf = data & 1;
- }
-
- m_adpcm_control = data;
-}
-
-// CD Interface Register 0x0e - ADPCM playback rate
-WRITE8_MEMBER(pce_cd_device::adpcm_playback_rate_w)
-{
- m_adpcm_clock_divider = 0x10 - (data & 0x0f);
- m_msm->set_unscaled_clock((PCE_CD_CLOCK / 6) / m_adpcm_clock_divider);
-}
-
-// CD Interface Register 0x0f - ADPCM fade in/out register
-// ---- xxxx command setting:
-// 0x00 ADPCM/CD-DA Fade-in
-// 0x01 CD-DA fade-in
-// 0x08 CD-DA fade-out (short) ADPCM fade-in
-// 0x09 CD-DA fade-out (long)
-// 0x0a ADPCM fade-out (long)
-// 0x0c CD-DA fade-out (short) ADPCM fade-in
-// 0x0d CD-DA fade-out (short)
-// 0x0e ADPCM fade-out (short)
-WRITE8_MEMBER(pce_cd_device::fade_register_w)
-{
- // TODO: timers needs HW tests
- if (m_fade_reg != data)
- {
- switch (data & 0xf)
- {
- case 0x00: //CD-DA / ADPCM enable (100 msecs)
- m_cdda_volume = 0.0;
- m_cdda_fadein_timer->adjust(attotime::from_usec(100), 100);
- m_adpcm_volume = 0.0;
- m_adpcm_fadein_timer->adjust(attotime::from_usec(100), 100);
- m_cdda_fadeout_timer->adjust(attotime::never);
- m_adpcm_fadeout_timer->adjust(attotime::never);
- break;
- case 0x01: //CD-DA enable (100 msecs)
- m_cdda_volume = 0.0;
- m_cdda_fadein_timer->adjust(attotime::from_usec(100), 100);
- m_cdda_fadeout_timer->adjust(attotime::never);
- break;
- case 0x08: //CD-DA short (1500 msecs) fade out / ADPCM enable
- m_cdda_volume = 100.0;
- m_cdda_fadeout_timer->adjust(attotime::from_usec(1500), 1500);
- m_adpcm_volume = 0.0;
- m_adpcm_fadein_timer->adjust(attotime::from_usec(100), 100);
- m_cdda_fadein_timer->adjust(attotime::never);
- m_adpcm_fadeout_timer->adjust(attotime::never);
- break;
- case 0x09: //CD-DA long (5000 msecs) fade out
- m_cdda_volume = 100.0;
- m_cdda_fadeout_timer->adjust(attotime::from_usec(5000), 5000);
- m_cdda_fadein_timer->adjust(attotime::never);
- break;
- case 0x0a: //ADPCM long (5000 msecs) fade out
- m_adpcm_volume = 100.0;
- m_adpcm_fadeout_timer->adjust(attotime::from_usec(5000), 5000);
- m_adpcm_fadein_timer->adjust(attotime::never);
- break;
- case 0x0c: //CD-DA short (1500 msecs) fade out / ADPCM enable
- m_cdda_volume = 100.0;
- m_cdda_fadeout_timer->adjust(attotime::from_usec(1500), 1500);
- m_adpcm_volume = 0.0;
- m_adpcm_fadein_timer->adjust(attotime::from_usec(100), 100);
- m_cdda_fadein_timer->adjust(attotime::never);
- m_adpcm_fadeout_timer->adjust(attotime::never);
- break;
- case 0x0d: //CD-DA short (1500 msecs) fade out
- m_cdda_volume = 100.0;
- m_cdda_fadeout_timer->adjust(attotime::from_usec(1500), 1500);
- m_cdda_fadein_timer->adjust(attotime::never);
- break;
- case 0x0e: //ADPCM short (1500 msecs) fade out
- m_adpcm_volume = 100.0;
- m_adpcm_fadeout_timer->adjust(attotime::from_usec(1500), 1500);
- m_adpcm_fadein_timer->adjust(attotime::never);
- break;
- default:
- popmessage("CD-DA / ADPCM Fade effect mode %02x, contact MESSdev",data & 0x0f);
- break;
- }
- }
- m_fade_reg = data;
-}
-
-TIMER_CALLBACK_MEMBER(pce_cd_device::clear_ack)
-{
- update();
- m_scsi_ACK = 0;
- update();
- if (m_scsi_CD)
- {
- m_adpcm_dma_reg &= 0xFC;
- }
-}
-
-uint8_t pce_cd_device::get_cd_data_byte()
-{
- uint8_t data = m_cdc_data;
- if (m_scsi_REQ && !m_scsi_ACK && !m_scsi_CD)
- {
- if (m_scsi_IO)
- {
- m_scsi_ACK = 1;
- machine().scheduler().timer_set(m_maincpu->cycles_to_attotime(15), timer_expired_delegate(FUNC(pce_cd_device::clear_ack),this));
- }
- }
- return data;
-}
-
-
-TIMER_CALLBACK_MEMBER(pce_cd_device::adpcm_dma_timer_callback)
-{
- if (m_scsi_REQ && !m_scsi_ACK && !m_scsi_CD && m_scsi_IO)
- {
- m_adpcm_ram[m_adpcm_write_ptr] = get_cd_data_byte();
- m_adpcm_write_ptr = (m_adpcm_write_ptr + 1) & 0xFFFF;
-
- m_adpcm_status &= ~4;
- }
-}
-
-uint8_t pce_cd_device::get_adpcm_ram_byte()
-{
- if (m_adpcm_read_buf > 0)
- {
- m_adpcm_read_buf--;
- return 0;
- }
- else
- {
- uint8_t res;
-
- res = m_adpcm_ram[m_adpcm_read_ptr];
- m_adpcm_read_ptr = ((m_adpcm_read_ptr + 1) & 0xffff);
-
- return res;
- }
-}
-
-/*
- *
- * I/O accessors
- *
- */
-// TODO: more stuff actually belongs to the whole CD interface,
-// cfr. pce_cd_intf_r/w in drivers/pce.cpp
-READ8_MEMBER(pce_cd_device::intf_r)
-{
- //logerror("%s: read from CD interface offset %02X\n", machine().describe_context(), offset );
-
- address_space &io_space = this->space(AS_IO);
- return io_space.read_byte(offset & 0xf);
-}
-
-WRITE8_MEMBER(pce_cd_device::intf_w)
-{
- //logerror("%s write to CD interface offset %02X, data %02X\n", machine().describe_context(), offset, data);
-
- address_space &io_space = this->space(AS_IO);
- io_space.write_byte(offset & 0xf, data);
-}
-
-/*
-
-PC Engine Arcade Card emulation
-
-*/
-
-READ8_MEMBER(pce_cd_device::acard_r)
-{
- uint8_t r_num;
-
- if ((offset & 0x2e0) == 0x2e0)
- {
- switch (offset & 0x2ef)
- {
- case 0x2e0: return (m_acard_shift >> 0) & 0xff;
- case 0x2e1: return (m_acard_shift >> 8) & 0xff;
- case 0x2e2: return (m_acard_shift >> 16) & 0xff;
- case 0x2e3: return (m_acard_shift >> 24) & 0xff;
- case 0x2e4: return (m_acard_shift_reg);
- case 0x2e5: return m_acard_latch;
- case 0x2ee: return 0x10;
- case 0x2ef: return 0x51;
- }
-
- return 0;
- }
-
- r_num = (offset & 0x30) >> 4;
-
- switch (offset & 0x0f)
- {
- case 0x00:
- case 0x01:
- {
- uint8_t res;
- if (m_acard_ctrl[r_num] & 2)
- res = m_acard_ram[(m_acard_base_addr[r_num] + m_acard_addr_offset[r_num]) & 0x1fffff];
- else
- res = m_acard_ram[m_acard_base_addr[r_num] & 0x1fffff];
-
- if (m_acard_ctrl[r_num] & 0x1)
- {
- if (m_acard_ctrl[r_num] & 0x10)
- {
- m_acard_base_addr[r_num] += m_acard_addr_inc[r_num];
- m_acard_base_addr[r_num] &= 0xffffff;
- }
- else
- {
- m_acard_addr_offset[r_num] += m_acard_addr_inc[r_num];
- }
- }
-
- return res;
- }
- case 0x02: return (m_acard_base_addr[r_num] >> 0) & 0xff;
- case 0x03: return (m_acard_base_addr[r_num] >> 8) & 0xff;
- case 0x04: return (m_acard_base_addr[r_num] >> 16) & 0xff;
- case 0x05: return (m_acard_addr_offset[r_num] >> 0) & 0xff;
- case 0x06: return (m_acard_addr_offset[r_num] >> 8) & 0xff;
- case 0x07: return (m_acard_addr_inc[r_num] >> 0) & 0xff;
- case 0x08: return (m_acard_addr_inc[r_num] >> 8) & 0xff;
- case 0x09: return m_acard_ctrl[r_num];
- default: return 0;
- }
-}
-
-WRITE8_MEMBER(pce_cd_device::acard_w)
-{
- uint8_t w_num;
-
- if ((offset & 0x2e0) == 0x2e0)
- {
- switch (offset & 0x0f)
- {
- case 0: m_acard_shift = (data & 0xff) | (m_acard_shift & 0xffffff00); break;
- case 1: m_acard_shift = (data << 8) | (m_acard_shift & 0xffff00ff); break;
- case 2: m_acard_shift = (data << 16) | (m_acard_shift & 0xff00ffff); break;
- case 3: m_acard_shift = (data << 24) | (m_acard_shift & 0x00ffffff); break;
- case 4:
- {
- m_acard_shift_reg = data & 0x0f;
-
- if (m_acard_shift_reg != 0)
- {
- m_acard_shift = (m_acard_shift_reg < 8) ?
- (m_acard_shift << m_acard_shift_reg)
- : (m_acard_shift >> (16 - m_acard_shift_reg));
- }
- }
- break;
- case 5: m_acard_latch = data; break;
- }
- }
- else
- {
- w_num = (offset & 0x30) >> 4;
-
- switch (offset & 0x0f)
- {
- case 0x00:
- case 0x01:
- if (m_acard_ctrl[w_num] & 2)
- m_acard_ram[(m_acard_base_addr[w_num] + m_acard_addr_offset[w_num]) & 0x1fffff] = data;
- else
- m_acard_ram[m_acard_base_addr[w_num] & 0x1FFFFF] = data;
-
- if (m_acard_ctrl[w_num] & 0x1)
- {
- if (m_acard_ctrl[w_num] & 0x10)
- {
- m_acard_base_addr[w_num] += m_acard_addr_inc[w_num];
- m_acard_base_addr[w_num] &= 0xffffff;
- }
- else
- {
- m_acard_addr_offset[w_num] += m_acard_addr_inc[w_num];
- }
- }
-
- break;
-
- case 0x02: m_acard_base_addr[w_num] = (data & 0xff) | (m_acard_base_addr[w_num] & 0xffff00); break;
- case 0x03: m_acard_base_addr[w_num] = (data << 8) | (m_acard_base_addr[w_num] & 0xff00ff); break;
- case 0x04: m_acard_base_addr[w_num] = (data << 16) | (m_acard_base_addr[w_num] & 0x00ffff); break;
- case 0x05: m_acard_addr_offset[w_num] = (data & 0xff) | (m_acard_addr_offset[w_num] & 0xff00); break;
- case 0x06:
- m_acard_addr_offset[w_num] = (data << 8) | (m_acard_addr_offset[w_num] & 0x00ff);
-
- if ((m_acard_ctrl[w_num] & 0x60) == 0x40)
- {
- m_acard_base_addr[w_num] += m_acard_addr_offset[w_num] + ((m_acard_ctrl[w_num] & 0x08) ? 0xff0000 : 0);
- m_acard_base_addr[w_num] &= 0xffffff;
- }
- break;
- case 0x07: m_acard_addr_inc[w_num] = (data & 0xff) | (m_acard_addr_inc[w_num] & 0xff00); break;
- case 0x08: m_acard_addr_inc[w_num] = (data << 8) | (m_acard_addr_inc[w_num] & 0x00ff); break;
- case 0x09: m_acard_ctrl[w_num] = data & 0x7f; break;
- case 0x0a:
- if ((m_acard_ctrl[w_num] & 0x60) == 0x60)
- {
- m_acard_base_addr[w_num] += m_acard_addr_offset[w_num];
- m_acard_base_addr[w_num] &= 0xffffff;
- }
- break;
- }
- }
-}