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author Fabio Priuli <etabeta78@users.noreply.github.com>2013-05-28 14:41:28 +0000
committer Fabio Priuli <etabeta78@users.noreply.github.com>2013-05-28 14:41:28 +0000
commitec27de6e7d37f035205ae4c893854ccfe0528852 (patch)
treee358427a1041cf3dc6e719ed3e1b15ec9fa0ada1 /src/mess/machine/pce_cd.c
parent9c9172383da151af87b3adbc7cf3ab6c0d17bd92 (diff)
(MESS) pce.c: moved the cd addon to be a separate device. now save states
work in the driver for HuCard games, not yet for CD games. [Fabio Priuli]
Diffstat (limited to 'src/mess/machine/pce_cd.c')
-rw-r--r--src/mess/machine/pce_cd.c1495
1 files changed, 1495 insertions, 0 deletions
diff --git a/src/mess/machine/pce_cd.c b/src/mess/machine/pce_cd.c
new file mode 100644
index 00000000000..e090f273723
--- /dev/null
+++ b/src/mess/machine/pce_cd.c
@@ -0,0 +1,1495 @@
+/************************************************************
+
+PC Engine CD HW notes:
+
+TODO:
+- Dragon Ball Z: ADPCM dies after the first upload;
+- Dragon Slayer - The Legend of Heroes: black screen;
+- Mirai Shonen Conan: dies at new game selection;
+- Snatcher: black screen after Konami logo, tries set up CD-DA
+ while transferring data?
+- 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;
+
+=============================================================
+
+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"
+#include "sound/cdda.h"
+
+
+#define PCE_CD_CLOCK 9216000
+
+
+const device_type PCE_CD = &device_creator<pce_cd_device>;
+
+
+pce_cd_device::pce_cd_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, PCE_CD, "PCE CD Add-on", tag, owner, clock, "pcecd", __FILE__),
+ m_nvram(*this, "bram"),
+ m_cdrom(*this, "cdrom")
+{
+}
+
+void pce_cd_device::device_start()
+{
+ /* Initialize BRAM */
+ m_bram = auto_alloc_array(machine(), UINT8, PCE_BRAM_SIZE * 2);
+ memset(m_bram, 0, PCE_BRAM_SIZE);
+ memset(m_bram + PCE_BRAM_SIZE, 0xff, PCE_BRAM_SIZE);
+ m_bram_locked = 1;
+
+ m_nvram->set_base(m_bram, PCE_BRAM_SIZE);
+
+ /* set up adpcm related things */
+ m_adpcm_ram = auto_alloc_array_clear(machine(), UINT8, PCE_ADPCM_RAM_SIZE);
+ m_adpcm_clock_divider = 1;
+ machine().device<msm5205_device>("msm5205")->change_clock_w((PCE_CD_CLOCK / 6) / m_adpcm_clock_divider);
+
+ /* Set up cd command buffer */
+ m_command_buffer = auto_alloc_array_clear(machine(), UINT8, PCE_CD_COMMAND_BUFFER_SIZE);
+ m_command_buffer_index = 0;
+
+ /* Set up Arcade Card RAM buffer */
+ m_acard_ram = auto_alloc_array_clear(machine(), UINT8, PCE_ACARD_RAM_SIZE);
+
+ m_data_buffer = auto_alloc_array_clear(machine(), UINT8, 8192);
+ m_data_buffer_size = 0;
+ m_data_buffer_index = 0;
+
+ m_subcode_buffer = auto_alloc_array(machine(), UINT8, 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_item(NAME(m_regs));
+ 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));
+}
+
+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;
+ //cdda_stop_audio(machine().device("cdda"));
+
+ memset(m_regs, 0, sizeof(m_regs));
+
+ m_regs[0x0c] |= PCE_CD_ADPCM_STOP_FLAG;
+ m_regs[0x0c] &= ~PCE_CD_ADPCM_PLAY_FLAG;
+ //m_regs[0x03] = (m_regs[0x03] & ~0x0c) | (PCE_CD_SAMPLE_STOP_PLAY);
+ m_msm_idle = 1;
+}
+
+
+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);
+ machine().device<cdda_device>("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;
+ }
+
+}
+
+struct cdrom_interface pce_cdrom =
+{
+ "pce_cdrom",
+ NULL
+};
+
+
+static MACHINE_CONFIG_FRAGMENT( pce_cd )
+ MCFG_NVRAM_ADD_0FILL("bram")
+
+// TODO: move here MSM5205 and CDDA!
+ MCFG_CDROM_ADD("cdrom", pce_cdrom)
+MACHINE_CONFIG_END
+
+machine_config_constructor pce_cd_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( pce_cd );
+}
+
+
+void pce_cd_device::adpcm_stop(UINT8 irq_flag)
+{
+ m_regs[0x0c] |= PCE_CD_ADPCM_STOP_FLAG;
+ m_regs[0x0c] &= ~PCE_CD_ADPCM_PLAY_FLAG;
+ //m_regs[0x03] = (m_regs[0x03] & ~0x0c) | (PCE_CD_SAMPLE_STOP_PLAY);
+ if (irq_flag)
+ set_irq_line(PCE_CD_IRQ_SAMPLE_FULL_PLAY, ASSERT_LINE);
+ m_regs[0x0d] &= ~0x60;
+ m_msm_idle = 1;
+}
+
+void pce_cd_device::adpcm_play()
+{
+ m_regs[0x0c] &= ~PCE_CD_ADPCM_STOP_FLAG;
+ m_regs[0x0c] |= PCE_CD_ADPCM_PLAY_FLAG;
+ set_irq_line(PCE_CD_IRQ_SAMPLE_FULL_PLAY, CLEAR_LINE);
+ m_regs[0x03] = (m_regs[0x03] & ~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.
+ */
+void pce_cd_device::msm5205_int(msm5205_device *device)
+{
+ UINT8 msm_data;
+
+ // popmessage("%08x %08x %08x %02x %02x",m_msm_start_addr,m_msm_end_addr,m_msm_half_addr,m_regs[0x0c],m_regs[0x0d]);
+
+ 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);
+
+ device->data_w(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);
+ device->reset_w(1);
+ }
+ }
+}
+
+#define SCSI_STATUS_OK 0x00
+#define SCSI_CHECK_CONDITION 0x02
+
+void pce_cd_device::reply_status_byte(UINT8 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_regs[0x01] = 0x00;
+ }
+ else
+ {
+ m_regs[0x01] = 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 frame = ((m_command_buffer[1] & 0x1f) << 16) | (m_command_buffer[2] << 8) | m_command_buffer[3];
+ UINT32 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;
+ machine().device<cdda_device>("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 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 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(NULL == nec_set_audio_start_position);
+ break;
+ }
+
+ m_current_frame = frame;
+
+ if (m_cdda_status == PCE_CD_CDDA_PAUSED)
+ {
+ m_cdda_status = PCE_CD_CDDA_OFF;
+ machine().device<cdda_device>("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
+ machine().device<cdda_device>("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
+ machine().device<cdda_device>("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 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 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(NULL == 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)
+ {
+ machine().device<cdda_device>("cdda")->pause_audio(0);
+ }
+ else
+ {
+ //printf("%08x %08x\n",m_current_frame,m_end_frame - m_current_frame);
+ machine().device<cdda_device>("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;
+ machine().device<cdda_device>("cdda")->stop_audio();
+ m_end_frame = m_last_frame;
+ m_end_mark = 0;
+// assert(NULL == 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 = machine().device<cdda_device>("cdda")->get_audio_lba();
+ machine().device<cdda_device>("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 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 = machine().device<cdda_device>("cdda")->get_audio_lba();
+ break;
+ case PCE_CD_CDDA_PLAYING:
+ m_data_buffer[0] = 0;
+ frame = machine().device<cdda_device>("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 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 = MAX(bcd_2_dec(m_command_buffer[2]), 1);
+ 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 == NULL); // 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 command_byte;
+ UINT8 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_regs[0x01]);
+
+ /* Check for buffer overflow */
+ assert(m_command_buffer_index < PCE_CD_COMMAND_BUFFER_SIZE);
+
+ m_command_buffer[m_command_buffer_index] = m_regs[0x01];
+ 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_regs[0x01] = 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_regs[0x01] = 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;
+ machine().device<cdda_device>("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 (machine().device<cdda_device>("cdda")->audio_ended() && m_end_mark == 1)
+ {
+ switch (m_cdda_play_mode & 3)
+ {
+ case 1: machine().device<cdda_device>("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_regs[0x03] |= num;
+ else
+ m_regs[0x03] &= ~num;
+
+ if (m_regs[0x02] & m_regs[0x03] & 0x7c)
+ {
+ //printf("IRQ PEND = %02x MASK = %02x IRQ ENABLE %02X\n",m_regs[0x02] & m_regs[0x03] & 0x7c,m_regs[0x02] & 0x7c,m_regs[0x03] & 0x7c);
+ machine().device<cpu_device>("maincpu")->set_input_line(1, ASSERT_LINE);
+ }
+ else
+ {
+ machine().device<cpu_device>("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, CD_TRACK_MODE1))
+ {
+ logerror("Mode1 CD read failed for frame #%d\n", m_current_frame);
+ }
+ else
+ {
+ logerror("Succesfully 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;
+ 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 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;
+ machine().device<cdda_device>("cdda")->set_volume(0.0);
+ m_cdda_fadeout_timer->adjust(attotime::never);
+ }
+ else
+ {
+ machine().device<cdda_device>("cdda")->set_volume(m_cdda_volume);
+ m_cdda_fadeout_timer->adjust(attotime::from_usec(param), param);
+ }
+}
+
+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;
+ machine().device<cdda_device>("cdda")->set_volume(100.0);
+ m_cdda_fadein_timer->adjust(attotime::never);
+ }
+ else
+ {
+ machine().device<cdda_device>("cdda")->set_volume(m_cdda_volume);
+ m_cdda_fadein_timer->adjust(attotime::from_usec(param), param);
+ }
+}
+
+TIMER_CALLBACK_MEMBER(pce_cd_device::adpcm_fadeout_callback)
+{
+ m_adpcm_volume -= 0.1;
+
+ if (m_adpcm_volume <= 0)
+ {
+ m_adpcm_volume = 0.0;
+ machine().device<msm5205_device>("msm5205")->set_volume(0.0);
+ m_adpcm_fadeout_timer->adjust(attotime::never);
+ }
+ else
+ {
+ machine().device<msm5205_device>("msm5205")->set_volume(m_adpcm_volume);
+ m_adpcm_fadeout_timer->adjust(attotime::from_usec(param), param);
+ }
+}
+
+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;
+ machine().device<msm5205_device>("msm5205")->set_volume(100.0);
+ m_adpcm_fadein_timer->adjust(attotime::never);
+ }
+ else
+ {
+ machine().device<msm5205_device>("msm5205")->set_volume(m_adpcm_volume);
+ m_adpcm_fadein_timer->adjust(attotime::from_usec(param), param);
+ }
+}
+
+
+WRITE8_MEMBER(pce_cd_device::intf_w)
+{
+ logerror("%04X: write to CD interface offset %02X, data %02X\n", space.device().safe_pc(), offset, data);
+
+ switch (offset & 0xf)
+ {
+ case 0x00: /* CDC status */
+ /* 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);
+ break;
+ case 0x01: /* CDC command / status / data */
+ break;
+ case 0x02: /* ADPCM / CD control / IRQ enable/disable */
+ /* bit 6 - transfer ready irq */
+ /* bit 5 - transfer done irq */
+ /* bit 4 - BRAM irq? */
+ /* bit 3 - ADPCM FULL irq */
+ /* bit 2 - ADPCM HALF irq */
+ m_scsi_ACK = data & 0x80;
+ /* Update mask register now otherwise it won't catch the irq enable/disable change */
+ m_regs[0x02] = data;
+ /* Don't set or reset any irq lines, but just verify the current state */
+ set_irq_line(0, 0);
+ break;
+ case 0x03: /* BRAM lock / CD status / IRQ - Read Only register */
+ break;
+ case 0x04: /* CD reset */
+ m_scsi_RST = data & 0x02;
+ break;
+ case 0x05: /* Convert PCM data / PCM data */
+ case 0x06: /* PCM data */
+ break;
+ case 0x07: /* BRAM unlock / CD status */
+ if (data & 0x80)
+ m_bram_locked = 0;
+ break;
+ case 0x08: /* ADPCM address (LSB) / CD data */
+ break;
+ case 0x09: /* ADPCM address (MSB) */
+ break;
+ case 0x0A: /* ADPCM RAM data port */
+ set_adpcm_ram_byte(data);
+ break;
+ case 0x0B: /* ADPCM DMA control */
+ if (data & 0x03)
+ {
+ /* Start CD to ADPCM transfer */
+ 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_regs[0x0c] |= 4;
+ }
+ break;
+ case 0x0C: /* ADPCM status */
+ break;
+ case 0x0D: /* ADPCM address control */
+ if ((m_regs[0x0D] & 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);
+ machine().device<msm5205_device>("msm5205")->reset_w(1);
+ }
+
+ if ((data & 0x40) && ((m_regs[0x0D] & 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();
+ machine().device<msm5205_device>("msm5205")->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);
+ machine().device<msm5205_device>("msm5205")->reset_w(1);
+ }
+
+ m_msm_repeat = BIT(data, 5);
+
+ if (data & 0x10) //ADPCM set length
+ {
+ m_adpcm_length = (m_regs[0x09] << 8) | m_regs[0x08];
+ }
+ if (data & 0x08) //ADPCM set read address
+ {
+ m_adpcm_read_ptr = (m_regs[0x09] << 8) | m_regs[0x08];
+ m_adpcm_read_buf = 2;
+ }
+ if ((data & 0x02) == 0x02) //ADPCM set write address
+ {
+ m_adpcm_write_ptr = (m_regs[0x09] << 8) | m_regs[0x08];
+ m_adpcm_write_buf = data & 1;
+ }
+ break;
+ case 0x0E: /* ADPCM playback rate */
+ m_adpcm_clock_divider = 0x10 - (data & 0x0f);
+ machine().device<msm5205_device>("msm5205")->change_clock_w((PCE_CD_CLOCK / 6) / m_adpcm_clock_divider);
+ break;
+ case 0x0F: /* ADPCM and CD audio fade timer */
+ /* TODO: timers needs HW tests */
+ if (m_regs[0xf] != 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;
+ }
+ }
+ break;
+ default:
+ return;
+ }
+ m_regs[offset & 0xf] = data;
+}
+
+TIMER_CALLBACK_MEMBER(pce_cd_device::clear_ack)
+{
+ update();
+ m_scsi_ACK = 0;
+ update();
+ if (m_scsi_CD)
+ {
+ m_regs[0x0B] &= 0xFC;
+ }
+}
+
+UINT8 pce_cd_device::get_cd_data_byte()
+{
+ UINT8 data = m_regs[0x01];
+ if (m_scsi_REQ && !m_scsi_ACK && !m_scsi_CD)
+ {
+ if (m_scsi_IO)
+ {
+ m_scsi_ACK = 1;
+ machine().scheduler().timer_set(machine().device<cpu_device>("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_regs[0x0c] &= ~4;
+ }
+}
+
+UINT8 pce_cd_device::get_adpcm_ram_byte()
+{
+ if (m_adpcm_read_buf > 0)
+ {
+ m_adpcm_read_buf--;
+ return 0;
+ }
+ else
+ {
+ UINT8 res;
+
+ res = m_adpcm_ram[m_adpcm_read_ptr];
+ m_adpcm_read_ptr = ((m_adpcm_read_ptr + 1) & 0xffff);
+
+ return res;
+ }
+}
+
+READ8_MEMBER(pce_cd_device::intf_r)
+{
+ UINT8 data = m_regs[offset & 0x0F];
+
+ logerror("%04X: read from CD interface offset %02X\n", space.device().safe_pc(), offset );
+
+ switch (offset & 0xf)
+ {
+ case 0x00: /* CDC status */
+ data &= 0x07;
+ data |= m_scsi_BSY ? 0x80 : 0;
+ data |= m_scsi_REQ ? 0x40 : 0;
+ data |= m_scsi_MSG ? 0x20 : 0;
+ data |= m_scsi_CD ? 0x10 : 0;
+ data |= m_scsi_IO ? 0x08 : 0;
+ break;
+ case 0x01: /* CDC command / status / data */
+ break;
+ case 0x02: /* ADPCM / CD control */
+ break;
+ case 0x03: /* BRAM lock / CD status */
+ /* bit 4 set when CD motor is on */
+ /* bit 2 set when less than half of the ADPCM data is remaining ?? */
+ m_bram_locked = 1;
+ data = data & 0x6E;
+ data |= (m_cd_motor_on ? 0x10 : 0);
+ m_regs[0x03] ^= 0x02; /* TODO: get rid of this hack */
+ break;
+ case 0x04: /* CD reset */
+ break;
+ case 0x05: /* Convert PCM data / PCM data */
+ data = machine().device<cdda_device>("cdda")->get_channel_volume((m_regs[0x03] & 2) ? 0 : 1) & 0xff;
+ break;
+ case 0x06: /* PCM data */
+ data = machine().device<cdda_device>("cdda")->get_channel_volume((m_regs[0x03] & 2) ? 0 : 1) >> 8;
+ break;
+ case 0x07: /* BRAM unlock / CD status */
+ data = (m_bram_locked ? (data & 0x7f) : (data | 0x80));
+ break;
+ case 0x08: /* ADPCM address (LSB) / CD data */
+ data = get_cd_data_byte();
+ break;
+ case 0x0A: /* ADPCM RAM data port */
+ data = get_adpcm_ram_byte();
+ break;
+ case 0x0B: /* ADPCM DMA control */
+ break;
+ case 0x0C: /* ADPCM status */
+ break;
+ case 0x0D: /* ADPCM address control */
+ break;
+ /* These are read-only registers */
+ case 0x09: /* ADPCM address (MSB) */
+ case 0x0E: /* ADPCM playback rate */
+ case 0x0F: /* ADPCM and CD audio fade timer */
+ return 0;
+ default:
+ data = 0xFF;
+ break;
+ }
+
+ return data;
+}
+
+
+/*
+
+PC Engine Arcade Card emulation
+
+*/
+
+READ8_MEMBER(pce_cd_device::acard_r)
+{
+ UINT8 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 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;
+ }
+
+ return 0;
+}
+
+WRITE8_MEMBER(pce_cd_device::acard_w)
+{
+ UINT8 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;
+ }
+ }
+}