Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-06-05 12:26:35 +03:00
Code Issues Actions 4 Packages Projects Releases Wiki Activity
e5bbf53153
mame/src/mess/machine/pce.c
Miodrag Milanovic 7285b359d2 Merge of MESS sources (no whatsnew)
2012-08-21 10:41:19 +00:00

1828 lines
52 KiB
C
Raw Blame History

/************************************************************
PC Engine CD HW notes:
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 "cpu/h6280/h6280.h"
#include "includes/pce.h"
#include "imagedev/chd_cd.h"
#include "sound/msm5205.h"
#include "sound/cdda.h"
#define PCE_BRAM_SIZE 0x800
#define PCE_ADPCM_RAM_SIZE 0x10000
#define PCE_ACARD_RAM_SIZE 0x200000
#define PCE_CD_COMMAND_BUFFER_SIZE 0x100
#define PCE_CD_IRQ_TRANSFER_READY 0x40
#define PCE_CD_IRQ_TRANSFER_DONE 0x20
#define PCE_CD_IRQ_SAMPLE_FULL_PLAY 0x08
#define PCE_CD_IRQ_SAMPLE_HALF_PLAY 0x04
#define PCE_CD_ADPCM_PLAY_FLAG 0x08
#define PCE_CD_ADPCM_STOP_FLAG 0x01
#define PCE_CD_DATA_FRAMES_PER_SECOND 75
enum {
PCE_CD_CDDA_OFF=0,
PCE_CD_CDDA_PLAYING,
PCE_CD_CDDA_PAUSED
};
/* CD Unit RAM */
/* MSM5205 ADPCM decoder definition */
static void pce_cd_msm5205_int(device_t *device);
const msm5205_interface pce_cd_msm5205_interface = {
pce_cd_msm5205_int, /* interrupt function */
MSM5205_S48_4B /* 1/48 prescaler, 4bit data */
};
/* joystick related data*/
#define JOY_CLOCK 0x01
#define JOY_RESET 0x02
/* prototypes */
static void pce_cd_init( running_machine &machine );
static void pce_cd_set_irq_line( running_machine &machine, int num, int state );
static TIMER_CALLBACK( pce_cd_adpcm_dma_timer_callback );
static TIMER_CALLBACK( pce_cd_cdda_fadeout_callback );
static TIMER_CALLBACK( pce_cd_cdda_fadein_callback );
static TIMER_CALLBACK( pce_cd_adpcm_fadeout_callback );
static TIMER_CALLBACK( pce_cd_adpcm_fadein_callback );
WRITE8_MEMBER(pce_state::pce_sf2_banking_w)
{
membank( "bank2" )->set_base( memregion("user1")->base() + offset * 0x080000 + 0x080000 );
membank( "bank3" )->set_base( memregion("user1")->base() + offset * 0x080000 + 0x088000 );
membank( "bank4" )->set_base( memregion("user1")->base() + offset * 0x080000 + 0x0D0000 );
}
WRITE8_MEMBER(pce_state::pce_cartridge_ram_w)
{
m_cartridge_ram[offset] = data;
}
DEVICE_IMAGE_LOAD(pce_cart)
{
pce_state *state = image.device().machine().driver_data<pce_state>();
UINT32 size;
int split_rom = 0, offset = 0;
const char *extrainfo = NULL;
unsigned char *ROM;
logerror("*** DEVICE_IMAGE_LOAD(pce_cart) : %s\n", image.filename());
/* open file to get size */
ROM = state->memregion("user1")->base();
if (image.software_entry() == NULL)
size = image.length();
else
size = image.get_software_region_length("rom");
/* handle header accordingly */
if ((size / 512) & 1)
{
logerror("*** DEVICE_IMAGE_LOAD(pce_cart) : Header present\n");
size -= 512;
offset = 512;
}
if (size > PCE_ROM_MAXSIZE)
size = PCE_ROM_MAXSIZE;
if (image.software_entry() == NULL)
{
image.fseek(offset, SEEK_SET);
image.fread( ROM, size);
}
else
memcpy(ROM, image.get_software_region("rom") + offset, size);
if (extrainfo)
{
logerror("extrainfo: %s\n", extrainfo);
if (strstr(extrainfo, "ROM_SPLIT"))
split_rom = 1;
}
if (ROM[0x1fff] < 0xe0)
{
int i;
UINT8 decrypted[256];
logerror( "*** DEVICE_IMAGE_LOAD(pce_cart) : ROM image seems encrypted, decrypting...\n" );
/* Initialize decryption table */
for (i = 0; i < 256; i++)
decrypted[i] = ((i & 0x01) << 7) | ((i & 0x02) << 5) | ((i & 0x04) << 3) | ((i & 0x08) << 1) | ((i & 0x10) >> 1) | ((i & 0x20 ) >> 3) | ((i & 0x40) >> 5) | ((i & 0x80) >> 7);
/* Decrypt ROM image */
for (i = 0; i < size; i++)
ROM[i] = decrypted[ROM[i]];
}
/* check if we're dealing with a split rom image */
if (size == 384 * 1024)
{
split_rom = 1;
/* Mirror the upper 128KB part of the image */
memcpy(ROM + 0x060000, ROM + 0x040000, 0x020000); /* Set up 060000 - 07FFFF mirror */
}
/* set up the memory for a split rom image */
if (split_rom)
{
logerror("Split rom detected, setting up memory accordingly\n");
/* Set up ROM address space as follows: */
/* 000000 - 03FFFF : ROM data 000000 - 03FFFF */
/* 040000 - 07FFFF : ROM data 000000 - 03FFFF */
/* 080000 - 0BFFFF : ROM data 040000 - 07FFFF */
/* 0C0000 - 0FFFFF : ROM data 040000 - 07FFFF */
memcpy(ROM + 0x080000, ROM + 0x040000, 0x040000); /* Set up 080000 - 0BFFFF region */
memcpy(ROM + 0x0C0000, ROM + 0x040000, 0x040000); /* Set up 0C0000 - 0FFFFF region */
memcpy(ROM + 0x040000, ROM, 0x040000); /* Set up 040000 - 07FFFF region */
}
else
{
/* mirror 256KB rom data */
if (size <= 0x040000)
memcpy(ROM + 0x040000, ROM, 0x040000);
/* mirror 512KB rom data */
if (size <= 0x080000)
memcpy(ROM + 0x080000, ROM, 0x080000);
}
state->membank("bank1")->set_base(ROM);
state->membank("bank2")->set_base(ROM + 0x080000);
state->membank("bank3")->set_base(ROM + 0x088000);
state->membank("bank4")->set_base(ROM + 0x0d0000);
/* Check for Street fighter 2 */
if (size == PCE_ROM_MAXSIZE)
{
image.device().machine().device("maincpu")->memory().space(AS_PROGRAM)->install_write_handler(0x01ff0, 0x01ff3, write8_delegate(FUNC(pce_state::pce_sf2_banking_w),state));
}
/* Check for Populous */
if (!memcmp(ROM + 0x1F26, "POPULOUS", 8))
{
state->m_cartridge_ram = auto_alloc_array(image.device().machine(), UINT8, 0x8000);
state->membank("bank2")->set_base(state->m_cartridge_ram);
image.device().machine().device("maincpu")->memory().space(AS_PROGRAM)->install_write_handler(0x080000, 0x087FFF, write8_delegate(FUNC(pce_state::pce_cartridge_ram_w),state));
}
/* Check for CD system card */
state->m_sys3_card = 0;
if (!memcmp(ROM + 0x3FFB6, "PC Engine CD-ROM SYSTEM", 23))
{
/* Check if 192KB additional system card ram should be used */
if(!memcmp(ROM + 0x29D1, "VER. 3.", 7)) { state->m_sys3_card = 1; } // JP version
else if(!memcmp(ROM + 0x29C4, "VER. 3.", 7 )) { state->m_sys3_card = 3; } // US version
if(state->m_sys3_card)
{
state->m_cartridge_ram = auto_alloc_array(image.device().machine(), UINT8, 0x30000);
state->membank("bank4")->set_base(state->m_cartridge_ram);
image.device().machine().device("maincpu")->memory().space(AS_PROGRAM)->install_write_handler(0x0D0000, 0x0FFFFF, write8_delegate(FUNC(pce_state::pce_cartridge_ram_w),state));
image.device().machine().device("maincpu")->memory().space(AS_PROGRAM)->install_readwrite_handler(0x080000, 0x087FFF, read8_delegate(FUNC(pce_state::pce_cd_acard_wram_r),state),write8_delegate(FUNC(pce_state::pce_cd_acard_wram_w),state));
}
}
return 0;
}
DRIVER_INIT_MEMBER(pce_state,mess_pce)
{
m_io_port_options = PCE_JOY_SIG | CONST_SIG;
}
DRIVER_INIT_MEMBER(pce_state,tg16)
{
m_io_port_options = TG_16_JOY_SIG | CONST_SIG;
}
DRIVER_INIT_MEMBER(pce_state,sgx)
{
m_io_port_options = PCE_JOY_SIG | CONST_SIG;
}
MACHINE_START( pce )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_init( machine );
machine.device<nvram_device>("nvram")->set_base(state->m_cd.bram, PCE_BRAM_SIZE);
}
MACHINE_RESET( mess_pce )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
int joy_i;
for (joy_i = 0; joy_i < 5; joy_i++)
state->m_joy_6b_packet[joy_i] = 0;
pce_cd.adpcm_read_buf = 0;
pce_cd.adpcm_write_buf = 0;
// TODO: add CD-DA stop command here
//pce_cd.cdda_status = PCE_CD_CDDA_OFF;
//cdda_stop_audio( machine.device( "cdda" ) );
pce_cd.regs[0x0c] |= PCE_CD_ADPCM_STOP_FLAG;
pce_cd.regs[0x0c] &= ~PCE_CD_ADPCM_PLAY_FLAG;
//pce_cd.regs[0x03] = (pce_cd.regs[0x03] & ~0x0c) | (PCE_CD_SAMPLE_STOP_PLAY);
pce_cd.msm_idle = 1;
/* Note: Arcade Card BIOS contents are the same as System 3, only internal HW differs.
We use a category to select between modes (some games can be run in either S-CD or A-CD modes) */
state->m_acard = machine.root_device().ioport("A_CARD")->read() & 1;
}
/* todo: how many input ports does the PCE have? */
WRITE8_MEMBER(pce_state::mess_pce_joystick_w)
{
int joy_i;
UINT8 joy_type = ioport("JOY_TYPE")->read();
h6280io_set_buffer(&space.device(), data);
/* bump counter on a low-to-high transition of bit 1 */
if ((!m_joystick_data_select) && (data & JOY_CLOCK))
{
m_joystick_port_select = (m_joystick_port_select + 1) & 0x07;
}
/* do we want buttons or direction? */
m_joystick_data_select = data & JOY_CLOCK;
/* clear counter if bit 2 is set */
if (data & JOY_RESET)
{
m_joystick_port_select = 0;
for (joy_i = 0; joy_i < 5; joy_i++)
{
if (((joy_type >> (joy_i*2)) & 3) == 2)
m_joy_6b_packet[joy_i] ^= 1;
}
}
}
READ8_MEMBER(pce_state::mess_pce_joystick_r)
{
static const char *const joyname[4][5] = {
{ "JOY_P1", "JOY_P2", "JOY_P3", "JOY_P4", "JOY_P5" },
{ },
{ "JOY6B_P1", "JOY6B_P2", "JOY6B_P3", "JOY6B_P4", "JOY6B_P5" },
{ }
};
UINT8 joy_type = ioport("JOY_TYPE")->read();
UINT8 ret, data;
if (m_joystick_port_select <= 4)
{
switch((joy_type >> (m_joystick_port_select*2)) & 3)
{
case 0: //2-buttons pad
data = ioport(joyname[0][m_joystick_port_select])->read();
break;
case 2: //6-buttons pad
/*
Two packets:
1st packet: directions + I, II, Run, Select
2nd packet: 6 buttons "header" (high 4 bits active low) + III, IV, V, VI
Note that six buttons pad just doesn't work with (almost?) every single 2-button-only games, it's really just an after-thought and it is like this
on real HW.
*/
data = ioport(joyname[2][m_joystick_port_select])->read() >> (m_joy_6b_packet[m_joystick_port_select]*8);
break;
default:
data = 0xff;
break;
}
}
else
data = 0xff;
if (m_joystick_data_select)
data >>= 4;
ret = (data & 0x0f) | m_io_port_options;
#ifdef UNIFIED_PCE
ret &= ~0x40;
#endif
return (ret);
}
static void pce_set_cd_bram( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
state->membank( "bank10" )->set_base( pce_cd.bram + ( pce_cd.bram_locked ? PCE_BRAM_SIZE : 0 ) );
}
static void adpcm_stop(running_machine &machine, UINT8 irq_flag)
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
pce_cd.regs[0x0c] |= PCE_CD_ADPCM_STOP_FLAG;
pce_cd.regs[0x0c] &= ~PCE_CD_ADPCM_PLAY_FLAG;
//pce_cd.regs[0x03] = (pce_cd.regs[0x03] & ~0x0c) | (PCE_CD_SAMPLE_STOP_PLAY);
if(irq_flag)
pce_cd_set_irq_line( machine, PCE_CD_IRQ_SAMPLE_FULL_PLAY, ASSERT_LINE );
pce_cd.regs[0x0d] &= ~0x60;
pce_cd.msm_idle = 1;
}
static void adpcm_play(running_machine &machine)
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
pce_cd.regs[0x0c] &= ~PCE_CD_ADPCM_STOP_FLAG;
pce_cd.regs[0x0c] |= PCE_CD_ADPCM_PLAY_FLAG;
pce_cd_set_irq_line( machine, PCE_CD_IRQ_SAMPLE_FULL_PLAY, CLEAR_LINE );
pce_cd.regs[0x03] = (pce_cd.regs[0x03] & ~0x0c);
pce_cd.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.
*/
static void pce_cd_msm5205_int(device_t *device)
{
pce_state *state = device->machine().driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
UINT8 msm_data;
// popmessage("%08x %08x %08x %02x %02x",pce_cd.msm_start_addr,pce_cd.msm_end_addr,pce_cd.msm_half_addr,pce_cd.regs[0x0c],pce_cd.regs[0x0d]);
if ( pce_cd.msm_idle )
return;
/* Supply new ADPCM data */
msm_data = (pce_cd.msm_nibble) ? (pce_cd.adpcm_ram[pce_cd.msm_start_addr] & 0x0f) : ((pce_cd.adpcm_ram[pce_cd.msm_start_addr] & 0xf0) >> 4);
msm5205_data_w(device, msm_data);
pce_cd.msm_nibble ^= 1;
if(pce_cd.msm_nibble == 0)
{
pce_cd.msm_start_addr++;
if(pce_cd.msm_start_addr == pce_cd.msm_half_addr)
{
//pce_cd_set_irq_line( device->machine(), PCE_CD_IRQ_SAMPLE_FULL_PLAY, CLEAR_LINE );
//pce_cd_set_irq_line( device->machine(), PCE_CD_IRQ_SAMPLE_HALF_PLAY, ASSERT_LINE );
}
if(pce_cd.msm_start_addr > pce_cd.msm_end_addr)
{
//pce_cd_set_irq_line( device->machine(), PCE_CD_IRQ_SAMPLE_HALF_PLAY, CLEAR_LINE );
//pce_cd_set_irq_line( device->machine(), PCE_CD_IRQ_SAMPLE_FULL_PLAY, CLEAR_LINE );
adpcm_stop(device->machine(),1);
msm5205_reset_w(device, 1);
}
}
}
#define SCSI_STATUS_OK 0x00
#define SCSI_CHECK_CONDITION 0x02
static void pce_cd_reply_status_byte( pce_state *state, UINT8 status )
{
pce_cd_t &pce_cd = state->m_cd;
logerror("Setting CD in reply_status_byte\n");
pce_cd.scsi_CD = pce_cd.scsi_IO = pce_cd.scsi_REQ = 1;
pce_cd.scsi_MSG = 0;
pce_cd.message_after_status = 1;
pce_cd.status_sent = pce_cd.message_sent = 0;
if ( status == SCSI_STATUS_OK )
{
pce_cd.regs[0x01] = 0x00;
}
else
{
pce_cd.regs[0x01] = 0x01;
}
}
/* 0x00 - TEST UNIT READY */
static void pce_cd_test_unit_ready( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
logerror("test unit ready\n");
if ( pce_cd.cd )
{
logerror( "Sending STATUS_OK status\n" );
pce_cd_reply_status_byte( state, SCSI_STATUS_OK );
}
else
{
logerror( "Sending CHECK_CONDITION status\n" );
pce_cd_reply_status_byte( state, SCSI_CHECK_CONDITION );
}
}
/* 0x08 - READ (6) */
static void pce_cd_read_6( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
UINT32 frame = ( ( pce_cd.command_buffer[1] & 0x1F ) << 16 ) | ( pce_cd.command_buffer[2] << 8 ) | pce_cd.command_buffer[3];
UINT32 frame_count = pce_cd.command_buffer[4];
/* Check for presence of a CD */
if ( ! pce_cd.cd )
{
pce_cd_reply_status_byte( state, SCSI_CHECK_CONDITION );
return;
}
if ( pce_cd.cdda_status != PCE_CD_CDDA_OFF )
{
pce_cd.cdda_status = PCE_CD_CDDA_OFF;
cdda_stop_audio( machine.device( "cdda" ) );
pce_cd.end_mark = 0;
}
pce_cd.current_frame = frame;
pce_cd.end_frame = frame + frame_count;
if ( frame_count == 0 )
{
/* Star Breaker uses this */
popmessage("Read Sector frame count == 0, contact MESSdev");
pce_cd_reply_status_byte( state, SCSI_STATUS_OK );
}
else
{
pce_cd.data_timer->adjust(attotime::from_hz( PCE_CD_DATA_FRAMES_PER_SECOND ), 0, attotime::from_hz( PCE_CD_DATA_FRAMES_PER_SECOND ));
}
}
/* 0xD8 - SET AUDIO PLAYBACK START POSITION (NEC) */
static void pce_cd_nec_set_audio_start_position( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
UINT32 frame = 0;
if ( ! pce_cd.cd )
{
/* Throw some error here */
pce_cd_reply_status_byte( state, SCSI_CHECK_CONDITION );
return;
}
switch( pce_cd.command_buffer[9] & 0xC0 )
{
case 0x00:
popmessage("CD-DA set start mode 0x00, contact MESSdev");
frame = ( pce_cd.command_buffer[3] << 16 ) | ( pce_cd.command_buffer[4] << 8 ) | pce_cd.command_buffer[5];
break;
case 0x40:
{
UINT8 m,s,f;
m = bcd_2_dec( pce_cd.command_buffer[2]);
s = bcd_2_dec( pce_cd.command_buffer[3]);
f = bcd_2_dec( pce_cd.command_buffer[4]);
frame = f + 75 * (s + m * 60);
if(frame >= 525) // TODO: seven seconds gap? O_o
frame -= 525;
break;
}
case 0x80:
frame = pce_cd.toc->tracks[ bcd_2_dec( pce_cd.command_buffer[2] ) - 1 ].physframeofs;
break;
default:
popmessage("CD-DA set start mode 0xc0, contact MESSdev");
//assert( NULL == pce_cd_nec_set_audio_start_position );
break;
}
pce_cd.current_frame = frame;
if ( pce_cd.cdda_status == PCE_CD_CDDA_PAUSED )
{
pce_cd.cdda_status = PCE_CD_CDDA_OFF;
cdda_stop_audio( machine.device( "cdda" ) );
pce_cd.end_frame = pce_cd.last_frame;
pce_cd.end_mark = 0;
}
else
{
if(pce_cd.command_buffer[1] & 0x03)
{
pce_cd.cdda_status = PCE_CD_CDDA_PLAYING;
pce_cd.end_frame = pce_cd.last_frame; //get the end of the CD
cdda_start_audio( machine.device( "cdda" ), pce_cd.current_frame, pce_cd.end_frame - pce_cd.current_frame );
pce_cd.cdda_play_mode = (pce_cd.command_buffer[1] & 0x02) ? 2 : 3; // mode 2 sets IRQ at end
pce_cd.end_mark = (pce_cd.command_buffer[1] & 0x02) ? 1 : 0;
}
else
{
pce_cd.cdda_status = PCE_CD_CDDA_PLAYING;
pce_cd.end_frame = pce_cd.toc->tracks[ cdrom_get_track(pce_cd.cd, pce_cd.current_frame) + 1 ].physframeofs; //get the end of THIS track
cdda_start_audio( machine.device( "cdda" ), pce_cd.current_frame, pce_cd.end_frame - pce_cd.current_frame );
pce_cd.end_mark = 0;
pce_cd.cdda_play_mode = 3;
}
}
pce_cd_reply_status_byte( state, SCSI_STATUS_OK );
pce_cd_set_irq_line( machine, PCE_CD_IRQ_TRANSFER_DONE, ASSERT_LINE );
}
/* 0xD9 - SET AUDIO PLAYBACK END POSITION (NEC) */
static void pce_cd_nec_set_audio_stop_position( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
UINT32 frame = 0;
if ( ! pce_cd.cd )
{
/* Throw some error here */
pce_cd_reply_status_byte( state, SCSI_CHECK_CONDITION );
return;
}
switch( pce_cd.command_buffer[9] & 0xC0 )
{
case 0x00:
popmessage("CD-DA set end mode 0x00, contact MESSdev");
frame = ( pce_cd.command_buffer[3] << 16 ) | ( pce_cd.command_buffer[4] << 8 ) | pce_cd.command_buffer[5];
break;
case 0x40:
{
UINT8 m,s,f;
m = bcd_2_dec( pce_cd.command_buffer[2]);
s = bcd_2_dec( pce_cd.command_buffer[3]);
f = bcd_2_dec( pce_cd.command_buffer[4]);
frame = f + 75 * (s + m * 60);
if(frame >= 525) // TODO: seven seconds gap? O_o
frame -= 525;
break;
}
case 0x80:
frame = pce_cd.toc->tracks[ bcd_2_dec( pce_cd.command_buffer[2] ) - 1 ].physframeofs;
break;
default:
popmessage("CD-DA set end mode 0xc0, contact MESSdev");
//assert( NULL == pce_cd_nec_set_audio_start_position );
break;
}
pce_cd.end_frame = frame;
pce_cd.cdda_play_mode = pce_cd.command_buffer[1] & 0x03;
if ( pce_cd.cdda_play_mode )
{
if ( pce_cd.cdda_status == PCE_CD_CDDA_PAUSED )
{
cdda_pause_audio( machine.device( "cdda" ), 0 );
}
else
{
cdda_start_audio( machine.device( "cdda" ), pce_cd.current_frame, pce_cd.end_frame - pce_cd.current_frame );
pce_cd.end_mark = 1;
}
pce_cd.cdda_status = PCE_CD_CDDA_PLAYING;
}
else
{
pce_cd.cdda_status = PCE_CD_CDDA_OFF;
cdda_stop_audio( machine.device( "cdda" ) );
pce_cd.end_frame = pce_cd.last_frame;
pce_cd.end_mark = 0;
// assert( NULL == pce_cd_nec_set_audio_stop_position );
}
pce_cd_reply_status_byte( state, SCSI_STATUS_OK );
pce_cd_set_irq_line( machine, PCE_CD_IRQ_TRANSFER_DONE, ASSERT_LINE );
}
/* 0xDA - PAUSE (NEC) */
static void pce_cd_nec_pause( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
/* If no cd mounted throw an error */
if ( ! pce_cd.cd )
{
pce_cd_reply_status_byte( state, SCSI_CHECK_CONDITION );
return;
}
/* If there was no cdda playing, throw an error */
if ( pce_cd.cdda_status == PCE_CD_CDDA_OFF )
{
pce_cd_reply_status_byte( state, SCSI_CHECK_CONDITION );
return;
}
pce_cd.cdda_status = PCE_CD_CDDA_PAUSED;
pce_cd.current_frame = cdda_get_audio_lba( machine.device( "cdda" ) );
cdda_pause_audio( machine.device( "cdda" ), 1 );
pce_cd_reply_status_byte( state, SCSI_STATUS_OK );
}
/* 0xDD - READ SUBCHANNEL Q (NEC) */
static void pce_cd_nec_get_subq( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
/* 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 ( ! pce_cd.cd )
{
/* Throw some error here */
pce_cd_reply_status_byte( state, SCSI_CHECK_CONDITION );
return;
}
frame = pce_cd.current_frame;
switch( pce_cd.cdda_status )
{
case PCE_CD_CDDA_PAUSED:
pce_cd.data_buffer[0] = 2;
frame = cdda_get_audio_lba( machine.device( "cdda" ) );
break;
case PCE_CD_CDDA_PLAYING:
pce_cd.data_buffer[0] = 0;
frame = cdda_get_audio_lba( machine.device( "cdda" ) );
break;
default:
pce_cd.data_buffer[0] = 3;
break;
}
msf_abs = lba_to_msf_alt( frame );
track = cdrom_get_track( pce_cd.cd, frame );
msf_rel = lba_to_msf_alt( frame - cdrom_get_track_start( pce_cd.cd, track ) );
pce_cd.data_buffer[1] = 0x01 | ((cdrom_get_track_type(pce_cd.cd, cdrom_get_track(pce_cd.cd, track+1)) == CD_TRACK_AUDIO) ? 0x00 : 0x40);
pce_cd.data_buffer[2] = dec_2_bcd( track+1 ); /* track */
pce_cd.data_buffer[3] = 1; /* index */
pce_cd.data_buffer[4] = dec_2_bcd(( msf_rel >> 16 ) & 0xFF);/* M (relative) */
pce_cd.data_buffer[5] = dec_2_bcd(( msf_rel >> 8 ) & 0xFF); /* S (relative) */
pce_cd.data_buffer[6] = dec_2_bcd(msf_rel & 0xFF); /* F (relative) */
pce_cd.data_buffer[7] = dec_2_bcd(( msf_abs >> 16 ) & 0xFF);/* M (absolute) */
pce_cd.data_buffer[8] = dec_2_bcd(( msf_abs >> 8 ) & 0xFF); /* S (absolute) */
pce_cd.data_buffer[9] = dec_2_bcd(msf_abs & 0xFF); /* F (absolute) */
pce_cd.data_buffer_size = 10;
pce_cd.data_buffer_index = 0;
pce_cd.data_transferred = 1;
pce_cd.scsi_IO = 1;
pce_cd.scsi_CD = 0;
}
/* 0xDE - GET DIR INFO (NEC) */
static void pce_cd_nec_get_dir_info( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
UINT32 frame, msf, track = 0;
const cdrom_toc *toc;
logerror("nec get dir info\n");
if ( ! pce_cd.cd )
{
/* Throw some error here */
pce_cd_reply_status_byte( state, SCSI_CHECK_CONDITION );
}
toc = cdrom_get_toc( pce_cd.cd );
switch( pce_cd.command_buffer[1] )
{
case 0x00: /* Get first and last track numbers */
pce_cd.data_buffer[0] = dec_2_bcd(1);
pce_cd.data_buffer[1] = dec_2_bcd(toc->numtrks);
pce_cd.data_buffer_size = 2;
break;
case 0x01: /* Get total disk size in MSF format */
frame = toc->tracks[toc->numtrks-1].physframeofs;
frame += toc->tracks[toc->numtrks-1].frames;
msf = lba_to_msf( frame + 150 );
pce_cd.data_buffer[0] = ( msf >> 16 ) & 0xFF; /* M */
pce_cd.data_buffer[1] = ( msf >> 8 ) & 0xFF; /* S */
pce_cd.data_buffer[2] = msf & 0xFF; /* F */
pce_cd.data_buffer_size = 3;
break;
case 0x02: /* Get track information */
if ( pce_cd.command_buffer[2] == 0xAA )
{
frame = toc->tracks[toc->numtrks-1].physframeofs;
frame += toc->tracks[toc->numtrks-1].frames;
pce_cd.data_buffer[3] = 0x04; /* correct? */
} else
{
track = MAX( bcd_2_dec( pce_cd.command_buffer[2] ), 1 );
frame = toc->tracks[track-1].physframeofs;
pce_cd.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 );
pce_cd.data_buffer[0] = ( msf >> 16 ) & 0xFF; /* M */
pce_cd.data_buffer[1] = ( msf >> 8 ) & 0xFF; /* S */
pce_cd.data_buffer[2] = msf & 0xFF; /* F */
pce_cd.data_buffer_size = 4;
break;
default:
// assert( pce_cd_nec_get_dir_info == NULL ); // Not implemented yet
break;
}
pce_cd.data_buffer_index = 0;
pce_cd.data_transferred = 1;
pce_cd.scsi_IO = 1;
pce_cd.scsi_CD = 0;
}
static void pce_cd_end_of_list( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_reply_status_byte( state, SCSI_CHECK_CONDITION );
}
static void pce_cd_handle_data_output( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
static const struct {
UINT8 command_byte;
UINT8 command_size;
void (*command_handler)(running_machine &machine);
} pce_cd_commands[] = {
{ 0x00, 6, pce_cd_test_unit_ready }, /* TEST UNIT READY */
{ 0x08, 6, pce_cd_read_6 }, /* READ (6) */
{ 0xD8,10, pce_cd_nec_set_audio_start_position }, /* NEC SET AUDIO PLAYBACK START POSITION */
{ 0xD9,10, pce_cd_nec_set_audio_stop_position }, /* NEC SET AUDIO PLAYBACK END POSITION */
{ 0xDA,10, pce_cd_nec_pause }, /* NEC PAUSE */
{ 0xDD,10, pce_cd_nec_get_subq }, /* NEC GET SUBCHANNEL Q */
{ 0xDE,10, pce_cd_nec_get_dir_info }, /* NEC GET DIR INFO */
{ 0xFF, 1, pce_cd_end_of_list } /* end of list marker */
};
if ( pce_cd.scsi_REQ && pce_cd.scsi_ACK )
{
/* Command byte received */
logerror( "Command byte $%02X received\n", pce_cd.regs[0x01] );
/* Check for buffer overflow */
assert( pce_cd.command_buffer_index < PCE_CD_COMMAND_BUFFER_SIZE );
pce_cd.command_buffer[pce_cd.command_buffer_index] = pce_cd.regs[0x01];
pce_cd.command_buffer_index++;
pce_cd.scsi_REQ = 0;
}
if ( ! pce_cd.scsi_REQ && ! pce_cd.scsi_ACK && pce_cd.command_buffer_index )
{
int i = 0;
logerror( "Check if command done\n" );
for( i = 0; pce_cd.command_buffer[0] > pce_cd_commands[i].command_byte; i++ );
/* Check for unknown commands */
if ( pce_cd.command_buffer[0] != pce_cd_commands[i].command_byte )
{
logerror("Unrecognized command: %02X\n", pce_cd.command_buffer[0] );
if(pce_cd.command_buffer[0] == 0x03)
popmessage("CD command 0x03 issued (Request Sense), contact MESSdev");
}
assert( pce_cd.command_buffer[0] == pce_cd_commands[i].command_byte );
if ( pce_cd.command_buffer_index == pce_cd_commands[i].command_size )
{
(pce_cd_commands[i].command_handler)( machine );
pce_cd.command_buffer_index = 0;
}
else
{
pce_cd.scsi_REQ = 1;
}
}
}
static void pce_cd_handle_data_input( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
if ( pce_cd.scsi_CD )
{
/* Command / Status byte */
if ( pce_cd.scsi_REQ && pce_cd.scsi_ACK )
{
logerror( "status sent\n" );
pce_cd.scsi_REQ = 0;
pce_cd.status_sent = 1;
}
if ( ! pce_cd.scsi_REQ && ! pce_cd.scsi_ACK && pce_cd.status_sent )
{
pce_cd.status_sent = 0;
if ( pce_cd.message_after_status )
{
logerror( "message after status\n" );
pce_cd.message_after_status = 0;
pce_cd.scsi_MSG = pce_cd.scsi_REQ = 1;
pce_cd.regs[0x01] = 0;
}
}
}
else
{
/* Data */
if ( pce_cd.scsi_REQ && pce_cd.scsi_ACK )
{
pce_cd.scsi_REQ = 0;
}
if ( ! pce_cd.scsi_REQ && ! pce_cd.scsi_ACK )
{
if ( pce_cd.data_buffer_index == pce_cd.data_buffer_size )
{
pce_cd_set_irq_line( machine, PCE_CD_IRQ_TRANSFER_READY, CLEAR_LINE );
if ( pce_cd.data_transferred )
{
pce_cd.data_transferred = 0;
pce_cd_reply_status_byte( state, SCSI_STATUS_OK );
pce_cd_set_irq_line( machine, PCE_CD_IRQ_TRANSFER_DONE, ASSERT_LINE );
}
}
else
{
logerror("Transfer byte from offset %d\n", pce_cd.data_buffer_index);
pce_cd.regs[0x01] = pce_cd.data_buffer[pce_cd.data_buffer_index];
pce_cd.data_buffer_index++;
pce_cd.scsi_REQ = 1;
}
}
}
}
static void pce_cd_handle_message_output( pce_state *state )
{
pce_cd_t &pce_cd = state->m_cd;
if ( pce_cd.scsi_REQ && pce_cd.scsi_ACK )
{
pce_cd.scsi_REQ = 0;
}
}
static void pce_cd_handle_message_input( pce_state *state )
{
pce_cd_t &pce_cd = state->m_cd;
if ( pce_cd.scsi_REQ && pce_cd.scsi_ACK )
{
pce_cd.scsi_REQ = 0;
pce_cd.message_sent = 1;
}
if ( ! pce_cd.scsi_REQ && ! pce_cd.scsi_ACK && pce_cd.message_sent )
{
pce_cd.message_sent = 0;
pce_cd.scsi_BSY = 0;
}
}
/* Update internal CD statuses */
static void pce_cd_update( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
/* Check for reset of CD unit */
if ( pce_cd.scsi_RST != pce_cd.scsi_last_RST )
{
if ( pce_cd.scsi_RST )
{
logerror("Performing CD reset\n");
/* Reset internal data */
pce_cd.scsi_BSY = pce_cd.scsi_SEL = pce_cd.scsi_CD = pce_cd.scsi_IO = 0;
pce_cd.scsi_MSG = pce_cd.scsi_REQ = pce_cd.scsi_ATN = 0;
pce_cd.cd_motor_on = 0;
pce_cd.selected = 0;
pce_cd.cdda_status = PCE_CD_CDDA_OFF;
cdda_stop_audio( machine.device( "cdda" ) );
pce_cd.adpcm_dma_timer->adjust(attotime::never); // stop ADPCM DMA here
}
pce_cd.scsi_last_RST = pce_cd.scsi_RST;
}
/* Check if bus can be freed */
if ( ! pce_cd.scsi_SEL && ! pce_cd.scsi_BSY && pce_cd.selected )
{
logerror( "freeing bus\n" );
pce_cd.selected = 0;
pce_cd.scsi_CD = pce_cd.scsi_MSG = pce_cd.scsi_IO = pce_cd.scsi_REQ = 0;
pce_cd_set_irq_line( machine, PCE_CD_IRQ_TRANSFER_DONE, CLEAR_LINE );
}
/* Select the CD device */
if ( pce_cd.scsi_SEL )
{
if ( ! pce_cd.selected )
{
pce_cd.selected = 1;
logerror("Setting CD in device selection\n");
pce_cd.scsi_BSY = pce_cd.scsi_REQ = pce_cd.scsi_CD = 1;
pce_cd.scsi_MSG = pce_cd.scsi_IO = 0;
}
}
if ( pce_cd.scsi_ATN )
{
}
else
{
/* Check for data and pessage phases */
if ( pce_cd.scsi_BSY )
{
if ( pce_cd.scsi_MSG )
{
/* message phase */
if ( pce_cd.scsi_IO )
{
pce_cd_handle_message_input(state);
}
else
{
pce_cd_handle_message_output(state);
}
}
else
{
/* data phase */
if ( pce_cd.scsi_IO )
{
/* Reading data from target */
pce_cd_handle_data_input( machine );
}
else
{
/* Sending data to target */
pce_cd_handle_data_output( machine );
}
}
}
}
/* FIXME: presumably CD-DA needs an irq interface for this */
if(cdda_audio_ended(machine.device("cdda")) && pce_cd.end_mark == 1)
{
switch(pce_cd.cdda_play_mode & 3)
{
case 1: cdda_start_audio( machine.device( "cdda" ), pce_cd.current_frame, pce_cd.end_frame - pce_cd.current_frame ); pce_cd.end_mark = 1; break; //play with repeat
case 2: pce_cd_set_irq_line( machine, PCE_CD_IRQ_TRANSFER_DONE, ASSERT_LINE ); pce_cd.end_mark = 0; break; //irq when finished
case 3: pce_cd.end_mark = 0; break; //play without repeat
}
}
}
static void pce_cd_set_irq_line( running_machine &machine, int num, int state )
{
pce_state *drvstate = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = drvstate->m_cd;
switch( num )
{
case PCE_CD_IRQ_TRANSFER_DONE:
if ( state == ASSERT_LINE )
{
pce_cd.regs[0x03] |= PCE_CD_IRQ_TRANSFER_DONE;
}
else
{
pce_cd.regs[0x03] &= ~ PCE_CD_IRQ_TRANSFER_DONE;
}
break;
case PCE_CD_IRQ_TRANSFER_READY:
if ( state == ASSERT_LINE )
{
pce_cd.regs[0x03] |= PCE_CD_IRQ_TRANSFER_READY;
}
else
{
pce_cd.regs[0x03] &= ~ PCE_CD_IRQ_TRANSFER_READY;
}
break;
case PCE_CD_IRQ_SAMPLE_FULL_PLAY:
if ( state == ASSERT_LINE )
{
pce_cd.regs[0x03] |= PCE_CD_IRQ_SAMPLE_FULL_PLAY;
//printf("x %02x %02x\n",pce_cd.regs[0x02],pce_cd.regs[0x03]);
}
else
{
pce_cd.regs[0x03] &= ~ PCE_CD_IRQ_SAMPLE_FULL_PLAY;
}
break;
case PCE_CD_IRQ_SAMPLE_HALF_PLAY:
if ( state == ASSERT_LINE )
{
pce_cd.regs[0x03] |= PCE_CD_IRQ_SAMPLE_HALF_PLAY;
//printf("y %02x %02x\n",pce_cd.regs[0x02],pce_cd.regs[0x03]);
}
else
{
pce_cd.regs[0x03] &= ~ PCE_CD_IRQ_SAMPLE_HALF_PLAY;
}
break;
default:
break;
}
if ( pce_cd.regs[0x02] & pce_cd.regs[0x03] & ( PCE_CD_IRQ_TRANSFER_DONE | PCE_CD_IRQ_TRANSFER_READY | PCE_CD_IRQ_SAMPLE_HALF_PLAY | PCE_CD_IRQ_SAMPLE_FULL_PLAY) )
{
cputag_set_input_line(machine, "maincpu", 1, ASSERT_LINE );
}
else
{
cputag_set_input_line(machine, "maincpu", 1, CLEAR_LINE );
}
}
static TIMER_CALLBACK( pce_cd_data_timer_callback )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
if ( pce_cd.data_buffer_index == pce_cd.data_buffer_size )
{
/* Read next data sector */
logerror("read sector %d\n", pce_cd.current_frame );
if ( ! cdrom_read_data( pce_cd.cd, pce_cd.current_frame, pce_cd.data_buffer, CD_TRACK_MODE1 ) )
{
logerror("Mode1 CD read failed for frame #%d\n", pce_cd.current_frame );
}
else
{
logerror("Succesfully read mode1 frame #%d\n", pce_cd.current_frame );
}
pce_cd.data_buffer_index = 0;
pce_cd.data_buffer_size = 2048;
pce_cd.current_frame++;
pce_cd.scsi_IO = 1;
pce_cd.scsi_CD = 0;
if ( pce_cd.current_frame == pce_cd.end_frame )
{
/* We are done, disable the timer */
logerror("Last frame read from CD\n");
pce_cd.data_transferred = 1;
pce_cd.data_timer->adjust(attotime::never);
}
else
{
pce_cd.data_transferred = 0;
}
}
}
static void pce_cd_init( running_machine &machine )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
cdrom_image_device *device;
/* Initialize pce_cd struct */
memset( &pce_cd, 0, sizeof(pce_cd) );
/* Initialize BRAM */
pce_cd.bram = auto_alloc_array(machine, UINT8, PCE_BRAM_SIZE * 2 );
memset( pce_cd.bram, 0, PCE_BRAM_SIZE );
memset( pce_cd.bram + PCE_BRAM_SIZE, 0xFF, PCE_BRAM_SIZE );
pce_cd.bram_locked = 1;
pce_set_cd_bram(machine);
/* set up adpcm related things */
pce_cd.adpcm_ram = auto_alloc_array(machine, UINT8, PCE_ADPCM_RAM_SIZE );
memset( pce_cd.adpcm_ram, 0, PCE_ADPCM_RAM_SIZE );
pce_cd.adpcm_clock_divider = 1;
msm5205_change_clock_w(machine.device("msm5205"), (PCE_CD_CLOCK / 6) / pce_cd.adpcm_clock_divider);
/* Set up cd command buffer */
pce_cd.command_buffer = auto_alloc_array(machine, UINT8, PCE_CD_COMMAND_BUFFER_SIZE );
memset( pce_cd.command_buffer, 0, PCE_CD_COMMAND_BUFFER_SIZE );
pce_cd.command_buffer_index = 0;
/* Set up Arcade Card RAM buffer */
pce_cd.acard_ram = auto_alloc_array(machine, UINT8, PCE_ACARD_RAM_SIZE );
memset( pce_cd.acard_ram, 0, PCE_ACARD_RAM_SIZE );
pce_cd.data_buffer = auto_alloc_array(machine, UINT8, 8192 );
memset( pce_cd.data_buffer, 0, 8192 );
pce_cd.data_buffer_size = 0;
pce_cd.data_buffer_index = 0;
pce_cd.subcode_buffer = auto_alloc_array(machine, UINT8, 96 );
device = machine.device<cdrom_image_device>("cdrom");
if ( device )
{
pce_cd.cd = device->get_cdrom_file();
if ( pce_cd.cd )
{
pce_cd.toc = cdrom_get_toc( pce_cd.cd );
cdda_set_cdrom( machine.device("cdda"), pce_cd.cd );
pce_cd.last_frame = cdrom_get_track_start( pce_cd.cd, cdrom_get_last_track( pce_cd.cd ) - 1 );
pce_cd.last_frame += pce_cd.toc->tracks[ cdrom_get_last_track( pce_cd.cd ) - 1 ].frames;
pce_cd.end_frame = pce_cd.last_frame;
}
}
pce_cd.data_timer = machine.scheduler().timer_alloc(FUNC(pce_cd_data_timer_callback));
pce_cd.data_timer->adjust(attotime::never);
pce_cd.adpcm_dma_timer = machine.scheduler().timer_alloc(FUNC(pce_cd_adpcm_dma_timer_callback));
pce_cd.adpcm_dma_timer->adjust(attotime::never);
pce_cd.cdda_fadeout_timer = machine.scheduler().timer_alloc(FUNC(pce_cd_cdda_fadeout_callback));
pce_cd.cdda_fadeout_timer->adjust(attotime::never);
pce_cd.cdda_fadein_timer = machine.scheduler().timer_alloc(FUNC(pce_cd_cdda_fadein_callback));
pce_cd.cdda_fadein_timer->adjust(attotime::never);
pce_cd.adpcm_fadeout_timer = machine.scheduler().timer_alloc(FUNC(pce_cd_adpcm_fadeout_callback));
pce_cd.adpcm_fadeout_timer->adjust(attotime::never);
pce_cd.adpcm_fadein_timer = machine.scheduler().timer_alloc(FUNC(pce_cd_adpcm_fadein_callback));
pce_cd.adpcm_fadein_timer->adjust(attotime::never);
}
WRITE8_MEMBER(pce_state::pce_cd_bram_w)
{
pce_cd_t &pce_cd = m_cd;
if ( ! pce_cd.bram_locked )
{
pce_cd.bram[ offset ] = data;
}
}
static void pce_cd_set_adpcm_ram_byte(running_machine &machine, UINT8 val)
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
if(pce_cd.adpcm_write_buf > 0)
{
pce_cd.adpcm_write_buf--;
}
else
{
pce_cd.adpcm_ram[pce_cd.adpcm_write_ptr] = val;
pce_cd.adpcm_write_ptr = ((pce_cd.adpcm_write_ptr + 1) & 0xffff);
//TODO: length + 1
}
}
static TIMER_CALLBACK( pce_cd_cdda_fadeout_callback )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
pce_cd.cdda_volume-= 0.1;
if(pce_cd.cdda_volume <= 0)
{
pce_cd.cdda_volume = 0.0;
cdda_set_volume(machine.device("cdda"), 0.0);
pce_cd.cdda_fadeout_timer->adjust(attotime::never);
}
else
{
cdda_set_volume(machine.device("cdda"), pce_cd.cdda_volume);
pce_cd.cdda_fadeout_timer->adjust(attotime::from_usec(param), param);
}
}
static TIMER_CALLBACK( pce_cd_cdda_fadein_callback )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
pce_cd.cdda_volume+= 0.1;
if(pce_cd.cdda_volume >= 100.0)
{
pce_cd.cdda_volume = 100.0;
cdda_set_volume(machine.device("cdda"), 100.0);
pce_cd.cdda_fadein_timer->adjust(attotime::never);
}
else
{
cdda_set_volume(machine.device("cdda"), pce_cd.cdda_volume);
pce_cd.cdda_fadein_timer->adjust(attotime::from_usec(param), param);
}
}
static TIMER_CALLBACK( pce_cd_adpcm_fadeout_callback )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
pce_cd.adpcm_volume-= 0.1;
if(pce_cd.adpcm_volume <= 0)
{
pce_cd.adpcm_volume = 0.0;
msm5205_set_volume(machine.device("msm5205"), 0.0);
pce_cd.adpcm_fadeout_timer->adjust(attotime::never);
}
else
{
msm5205_set_volume(machine.device("msm5205"), pce_cd.adpcm_volume);
pce_cd.adpcm_fadeout_timer->adjust(attotime::from_usec(param), param);
}
}
static TIMER_CALLBACK( pce_cd_adpcm_fadein_callback )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
pce_cd.adpcm_volume+= 0.1;
if(pce_cd.adpcm_volume >= 100.0)
{
pce_cd.adpcm_volume = 100.0;
msm5205_set_volume(machine.device("msm5205"), 100.0);
pce_cd.adpcm_fadein_timer->adjust(attotime::never);
}
else
{
msm5205_set_volume(machine.device("msm5205"), pce_cd.adpcm_volume);
pce_cd.adpcm_fadein_timer->adjust(attotime::from_usec(param), param);
}
}
WRITE8_MEMBER(pce_state::pce_cd_intf_w)
{
pce_cd_t &pce_cd = m_cd;
pce_cd_update(machine());
if(offset & 0x200 && m_sys3_card && m_acard) // route Arcade Card handling ports
return pce_cd_acard_w(space,offset,data);
logerror("%04X: write to CD interface offset %02X, data %02X\n", cpu_get_pc(&space.device()), offset, data );
switch( offset & 0xf )
{
case 0x00: /* CDC status */
/* select device (which bits??) */
pce_cd.scsi_SEL = 1;
pce_cd_update(machine());
pce_cd.scsi_SEL = 0;
pce_cd.adpcm_dma_timer->adjust(attotime::never); // stop ADPCM DMA here
/* any write here clears CD transfer irqs */
pce_cd.regs[0x03] &= ~0x70;
cputag_set_input_line(machine(), "maincpu", 1, 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 - ?? irq */
/* bit 3 - ?? irq */
/* bit 2 - ?? irq */
pce_cd.scsi_ACK = data & 0x80;
/* Update register now otherwise it won't catch the irq enable/disable change */
pce_cd.regs[0x02] = data;
/* Don't set or reset any irq lines, but just verify the current state */
pce_cd_set_irq_line( machine(), 0, 0 );
break;
case 0x03: /* BRAM lock / CD status / IRQ - Read Only register */
break;
case 0x04: /* CD reset */
pce_cd.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 )
{
pce_cd.bram_locked = 0;
pce_set_cd_bram(machine());
}
break;
case 0x08: /* ADPCM address (LSB) / CD data */
break;
case 0x09: /* ADPCM address (MSB) */
break;
case 0x0A: /* ADPCM RAM data port */
pce_cd_set_adpcm_ram_byte(machine(), data);
break;
case 0x0B: /* ADPCM DMA control */
if ( data & 0x03 )
{
/* Start CD to ADPCM transfer */
pce_cd.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 ) );
pce_cd.regs[0x0c] |= 4;
}
break;
case 0x0C: /* ADPCM status */
break;
case 0x0D: /* ADPCM address control */
if ( ( pce_cd.regs[0x0D] & 0x80 ) && ! ( data & 0x80 ) ) // ADPCM reset
{
/* Reset ADPCM hardware */
pce_cd.adpcm_read_ptr = 0;
pce_cd.adpcm_write_ptr = 0;
pce_cd.msm_start_addr = 0;
pce_cd.msm_end_addr = 0;
pce_cd.msm_half_addr = 0;
pce_cd.msm_nibble = 0;
adpcm_stop(machine(), 0);
msm5205_reset_w( machine().device( "msm5205"), 1 );
}
if ( ( data & 0x40) && ((pce_cd.regs[0x0D] & 0x40) == 0) ) // ADPCM play
{
pce_cd.msm_start_addr = (pce_cd.adpcm_read_ptr);
pce_cd.msm_end_addr = (pce_cd.adpcm_read_ptr + pce_cd.adpcm_length) & 0xffff;
pce_cd.msm_half_addr = (pce_cd.adpcm_read_ptr + (pce_cd.adpcm_length / 2)) & 0xffff;
pce_cd.msm_nibble = 0;
adpcm_play(machine());
msm5205_reset_w( machine().device( "msm5205"), 0 );
//popmessage("%08x %08x",pce_cd.adpcm_read_ptr,pce_cd.adpcm_length);
}
else if ( (data & 0x40) == 0 )
{
/* used by Buster Bros to cancel an in-flight sample */
adpcm_stop(machine(), 0);
msm5205_reset_w( machine().device( "msm5205"), 1 );
}
pce_cd.msm_repeat = (data & 0x20) >> 5;
if ( data & 0x10 ) //ADPCM set length
{
pce_cd.adpcm_length = ( pce_cd.regs[0x09] << 8 ) | pce_cd.regs[0x08];
}
if ( data & 0x08 ) //ADPCM set read address
{
pce_cd.adpcm_read_ptr = ( pce_cd.regs[0x09] << 8 ) | pce_cd.regs[0x08];
pce_cd.adpcm_read_buf = 2;
}
if ( ( data & 0x02 ) == 0x02 ) //ADPCM set write address
{
pce_cd.adpcm_write_ptr = ( pce_cd.regs[0x09] << 8 ) | pce_cd.regs[0x08];
pce_cd.adpcm_write_buf = data & 1;
}
break;
case 0x0E: /* ADPCM playback rate */
pce_cd.adpcm_clock_divider = 0x10 - ( data & 0x0F );
msm5205_change_clock_w(machine().device("msm5205"), (PCE_CD_CLOCK / 6) / pce_cd.adpcm_clock_divider);
break;
case 0x0F: /* ADPCM and CD audio fade timer */
/* TODO: timers needs HW tests */
if(pce_cd.regs[0xf] != data)
{
switch(data & 0xf)
{
case 0x00: //CD-DA / ADPCM enable (100 msecs)
pce_cd.cdda_volume = 0.0;
pce_cd.cdda_fadein_timer->adjust(attotime::from_usec(100), 100);
pce_cd.adpcm_volume = 0.0;
pce_cd.adpcm_fadein_timer->adjust(attotime::from_usec(100), 100);
pce_cd.cdda_fadeout_timer->adjust(attotime::never);
pce_cd.adpcm_fadeout_timer->adjust(attotime::never);
break;
case 0x01: //CD-DA enable (100 msecs)
pce_cd.cdda_volume = 0.0;
pce_cd.cdda_fadein_timer->adjust(attotime::from_usec(100), 100);
pce_cd.cdda_fadeout_timer->adjust(attotime::never);
break;
case 0x08: //CD-DA short (1500 msecs) fade out / ADPCM enable
pce_cd.cdda_volume = 100.0;
pce_cd.cdda_fadeout_timer->adjust(attotime::from_usec(1500), 1500);
pce_cd.adpcm_volume = 0.0;
pce_cd.adpcm_fadein_timer->adjust(attotime::from_usec(100), 100);
pce_cd.cdda_fadein_timer->adjust(attotime::never);
pce_cd.adpcm_fadeout_timer->adjust(attotime::never);
break;
case 0x09: //CD-DA long (5000 msecs) fade out
pce_cd.cdda_volume = 100.0;
pce_cd.cdda_fadeout_timer->adjust(attotime::from_usec(5000), 5000);
pce_cd.cdda_fadein_timer->adjust(attotime::never);
break;
case 0x0a: //ADPCM long (5000 msecs) fade out
pce_cd.adpcm_volume = 100.0;
pce_cd.adpcm_fadeout_timer->adjust(attotime::from_usec(5000), 5000);
pce_cd.adpcm_fadein_timer->adjust(attotime::never);
break;
case 0x0c: //CD-DA short (1500 msecs) fade out / ADPCM enable
pce_cd.cdda_volume = 100.0;
pce_cd.cdda_fadeout_timer->adjust(attotime::from_usec(1500), 1500);
pce_cd.adpcm_volume = 0.0;
pce_cd.adpcm_fadein_timer->adjust(attotime::from_usec(100), 100);
pce_cd.cdda_fadein_timer->adjust(attotime::never);
pce_cd.adpcm_fadeout_timer->adjust(attotime::never);
break;
case 0x0d: //CD-DA short (1500 msecs) fade out
pce_cd.cdda_volume = 100.0;
pce_cd.cdda_fadeout_timer->adjust(attotime::from_usec(1500), 1500);
pce_cd.cdda_fadein_timer->adjust(attotime::never);
break;
case 0x0e: //ADPCM short (1500 msecs) fade out
pce_cd.adpcm_volume = 100.0;
pce_cd.adpcm_fadeout_timer->adjust(attotime::from_usec(1500), 1500);
pce_cd.adpcm_fadein_timer->adjust(attotime::never);
break;
default:
popmessage("CD-DA / ADPCM Fade effect mode %02x, contact MESSdev",data & 0x0f);
break;
}
}
break;
default:
return;
}
pce_cd.regs[offset & 0xf] = data;
pce_cd_update(machine());
}
static TIMER_CALLBACK( pce_cd_clear_ack )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
pce_cd_update(machine);
pce_cd.scsi_ACK = 0;
pce_cd_update(machine);
if ( pce_cd.scsi_CD )
{
pce_cd.regs[0x0B] &= 0xFE;
}
}
static UINT8 pce_cd_get_cd_data_byte(running_machine &machine)
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
UINT8 data = pce_cd.regs[0x01];
if ( pce_cd.scsi_REQ && ! pce_cd.scsi_ACK && ! pce_cd.scsi_CD )
{
if ( pce_cd.scsi_IO )
{
pce_cd.scsi_ACK = 1;
machine.scheduler().timer_set(machine.device<cpu_device>("maincpu")->cycles_to_attotime(15), FUNC(pce_cd_clear_ack));
}
}
return data;
}
static TIMER_CALLBACK( pce_cd_adpcm_dma_timer_callback )
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
if ( pce_cd.scsi_REQ && ! pce_cd.scsi_ACK && ! pce_cd.scsi_CD && pce_cd.scsi_IO )
{
pce_cd.adpcm_ram[pce_cd.adpcm_write_ptr] = pce_cd_get_cd_data_byte(machine);
pce_cd.adpcm_write_ptr = ( pce_cd.adpcm_write_ptr + 1 ) & 0xFFFF;
pce_cd.regs[0x0c] &= ~4;
}
}
static UINT8 pce_cd_get_adpcm_ram_byte(running_machine &machine)
{
pce_state *state = machine.driver_data<pce_state>();
pce_cd_t &pce_cd = state->m_cd;
if(pce_cd.adpcm_read_buf > 0)
{
pce_cd.adpcm_read_buf--;
return 0;
}
else
{
UINT8 res;
res = pce_cd.adpcm_ram[pce_cd.adpcm_read_ptr];
pce_cd.adpcm_read_ptr = ((pce_cd.adpcm_read_ptr + 1) & 0xffff);
return res;
}
}
READ8_MEMBER(pce_state::pce_cd_intf_r)
{
pce_cd_t &pce_cd = m_cd;
UINT8 data = pce_cd.regs[offset & 0x0F];
pce_cd_update(machine());
if(offset & 0x200 && m_sys3_card && m_acard) // route Arcade Card handling ports
return pce_cd_acard_r(space,offset);
logerror("%04X: read from CD interface offset %02X\n", cpu_get_pc(&space.device()), offset );
if((offset & 0xc0) == 0xc0 && m_sys3_card) //System 3 Card header handling
{
switch(offset & 0xcf)
{
case 0xc1: return 0xaa;
case 0xc2: return 0x55;
case 0xc3: return 0x00;
case 0xc5: return (m_sys3_card & 2) ? 0x55 : 0xaa;
case 0xc6: return (m_sys3_card & 2) ? 0xaa : 0x55;
case 0xc7: return 0x03;
}
}
switch( offset & 0xf )
{
case 0x00: /* CDC status */
data &= 0x07;
data |= pce_cd.scsi_BSY ? 0x80 : 0;
data |= pce_cd.scsi_REQ ? 0x40 : 0;
data |= pce_cd.scsi_MSG ? 0x20 : 0;
data |= pce_cd.scsi_CD ? 0x10 : 0;
data |= pce_cd.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 ?? */
pce_cd.bram_locked = 1;
pce_set_cd_bram(machine());
data = data & 0x6E;
data |= ( pce_cd.cd_motor_on ? 0x10 : 0 );
pce_cd.regs[0x03] ^= 0x02; /* TODO: get rid of this hack */
break;
case 0x04: /* CD reset */
break;
case 0x05: /* Convert PCM data / PCM data */
case 0x06: /* PCM data */
break;
case 0x07: /* BRAM unlock / CD status */
data = ( pce_cd.bram_locked ? ( data & 0x7F ) : ( data | 0x80 ) );
break;
case 0x08: /* ADPCM address (LSB) / CD data */
data = pce_cd_get_cd_data_byte(machine());
break;
case 0x0A: /* ADPCM RAM data port */
data = pce_cd_get_adpcm_ram_byte(machine());
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_state::pce_cd_acard_r)
{
pce_cd_t &pce_cd = m_cd;
UINT8 r_num;
if((offset & 0x2e0) == 0x2e0)
{
switch(offset & 0x2ef)
{
case 0x2e0: return (pce_cd.acard_shift >> 0) & 0xff;
case 0x2e1: return (pce_cd.acard_shift >> 8) & 0xff;
case 0x2e2: return (pce_cd.acard_shift >> 16) & 0xff;
case 0x2e3: return (pce_cd.acard_shift >> 24) & 0xff;
case 0x2e4: return (pce_cd.acard_shift_reg);
case 0x2e5: return pce_cd.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(pce_cd.acard_ctrl[r_num] & 2)
res = pce_cd.acard_ram[(pce_cd.acard_base_addr[r_num] + pce_cd.acard_addr_offset[r_num]) & 0x1fffff];
else
res = pce_cd.acard_ram[pce_cd.acard_base_addr[r_num] & 0x1fffff];
if(pce_cd.acard_ctrl[r_num] & 0x1)
{
if(pce_cd.acard_ctrl[r_num] & 0x10)
{
pce_cd.acard_base_addr[r_num] += pce_cd.acard_addr_inc[r_num];
pce_cd.acard_base_addr[r_num] &= 0xffffff;
}
else
{
pce_cd.acard_addr_offset[r_num] += pce_cd.acard_addr_inc[r_num];
}
}
return res;
}
case 0x02: return (pce_cd.acard_base_addr[r_num] >> 0) & 0xff;
case 0x03: return (pce_cd.acard_base_addr[r_num] >> 8) & 0xff;
case 0x04: return (pce_cd.acard_base_addr[r_num] >> 16) & 0xff;
case 0x05: return (pce_cd.acard_addr_offset[r_num] >> 0) & 0xff;
case 0x06: return (pce_cd.acard_addr_offset[r_num] >> 8) & 0xff;
case 0x07: return (pce_cd.acard_addr_inc[r_num] >> 0) & 0xff;
case 0x08: return (pce_cd.acard_addr_inc[r_num] >> 8) & 0xff;
case 0x09: return pce_cd.acard_ctrl[r_num];
default: return 0;
}
return 0;
}
WRITE8_MEMBER(pce_state::pce_cd_acard_w)
{
pce_cd_t &pce_cd = m_cd;
UINT8 w_num;
if((offset & 0x2e0) == 0x2e0)
{
switch(offset & 0x0f)
{
case 0: pce_cd.acard_shift = (data & 0xff) | (pce_cd.acard_shift & 0xffffff00); break;
case 1: pce_cd.acard_shift = (data << 8) | (pce_cd.acard_shift & 0xffff00ff); break;
case 2: pce_cd.acard_shift = (data << 16) | (pce_cd.acard_shift & 0xff00ffff); break;
case 3: pce_cd.acard_shift = (data << 24) | (pce_cd.acard_shift & 0x00ffffff); break;
case 4:
{
pce_cd.acard_shift_reg = data & 0x0f;
if(pce_cd.acard_shift_reg != 0)
{
pce_cd.acard_shift = (pce_cd.acard_shift_reg < 8) ?
(pce_cd.acard_shift << pce_cd.acard_shift_reg)
: (pce_cd.acard_shift >> (16 - pce_cd.acard_shift_reg));
}
}
break;
case 5: pce_cd.acard_latch = data; break;
}
}
else
{
w_num = (offset & 0x30) >> 4;
switch(offset & 0x0f)
{
case 0x00:
case 0x01:
if(pce_cd.acard_ctrl[w_num] & 2)
pce_cd.acard_ram[(pce_cd.acard_base_addr[w_num] + pce_cd.acard_addr_offset[w_num]) & 0x1fffff] = data;
else
pce_cd.acard_ram[pce_cd.acard_base_addr[w_num] & 0x1FFFFF] = data;
if(pce_cd.acard_ctrl[w_num] & 0x1)
{
if(pce_cd.acard_ctrl[w_num] & 0x10)
{
pce_cd.acard_base_addr[w_num] += pce_cd.acard_addr_inc[w_num];
pce_cd.acard_base_addr[w_num] &= 0xffffff;
}
else
{
pce_cd.acard_addr_offset[w_num] += pce_cd.acard_addr_inc[w_num];
}
}
break;
case 0x02: pce_cd.acard_base_addr[w_num] = (data & 0xff) | (pce_cd.acard_base_addr[w_num] & 0xffff00); break;
case 0x03: pce_cd.acard_base_addr[w_num] = (data << 8) | (pce_cd.acard_base_addr[w_num] & 0xff00ff); break;
case 0x04: pce_cd.acard_base_addr[w_num] = (data << 16) | (pce_cd.acard_base_addr[w_num] & 0x00ffff); break;
case 0x05: pce_cd.acard_addr_offset[w_num] = (data & 0xff) | (pce_cd.acard_addr_offset[w_num] & 0xff00); break;
case 0x06:
pce_cd.acard_addr_offset[w_num] = (data << 8) | (pce_cd.acard_addr_offset[w_num] & 0x00ff);
if((pce_cd.acard_ctrl[w_num] & 0x60) == 0x40)
{
pce_cd.acard_base_addr[w_num] += pce_cd.acard_addr_offset[w_num] + ((pce_cd.acard_ctrl[w_num] & 0x08) ? 0xff0000 : 0);
pce_cd.acard_base_addr[w_num] &= 0xffffff;
}
break;
case 0x07: pce_cd.acard_addr_inc[w_num] = (data & 0xff) | (pce_cd.acard_addr_inc[w_num] & 0xff00); break;
case 0x08: pce_cd.acard_addr_inc[w_num] = (data << 8) | (pce_cd.acard_addr_inc[w_num] & 0x00ff); break;
case 0x09: pce_cd.acard_ctrl[w_num] = data & 0x7f; break;
case 0x0a:
if((pce_cd.acard_ctrl[w_num] & 0x60) == 0x60)
{
pce_cd.acard_base_addr[w_num] += pce_cd.acard_addr_offset[w_num];
pce_cd.acard_base_addr[w_num] &= 0xffffff;
}
break;
}
}
}
READ8_MEMBER(pce_state::pce_cd_acard_wram_r)
{
return pce_cd_intf_r(space,0x200 | (offset & 0x6000) >> 9);
}
WRITE8_MEMBER(pce_state::pce_cd_acard_wram_w)
{
pce_cd_intf_w(space,0x200 | (offset & 0x6000) >> 9,data);
}
Reference in New Issue View Git Blame Copy Permalink