/************************************************************************* ldv1000.c Pioneer LD-V1000 laserdisc emulation. Copyright Nicola Salmoria and the MAME Team. Visit http://mamedev.org for licensing and usage restrictions. ************************************************************************** Still to do: * fix issues * add OSD *************************************************************************/ #include "emu.h" #include "ldcore.h" #include "machine/8255ppi.h" #include "machine/z80ctc.h" #include "cpu/z80/z80.h" #include "cpu/z80/z80daisy.h" /*************************************************************************** DEBUGGING ***************************************************************************/ #define LOG_PORT_IO 0 #define LOG_STATUS_CHANGES 0 #define LOG_FRAMES_SEEN 0 #define LOG_COMMANDS 0 /*************************************************************************** CONSTANTS ***************************************************************************/ #define SCAN_SPEED (2000 / 30) /* 2000 frames/second */ #define SEEK_FAST_SPEED (4000 / 30) /* 4000 frames/second */ #define MULTIJUMP_TRACK_TIME attotime::from_usec(50) /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ /* player-specific data */ struct _ldplayer_data { /* low-level emulation data */ device_t *cpu; /* CPU index of the Z80 */ device_t *ctc; /* CTC device */ timer_device * multitimer; /* multi-jump timer device */ /* communication status */ UINT8 command; /* command byte to the player */ UINT8 status; /* status byte from the player */ UINT8 vsync; /* VSYNC state */ /* I/O port states */ UINT8 counter_start; /* starting value for counter */ UINT8 counter; /* current counter value */ UINT8 portc0; /* port C on PPI 0 */ UINT8 portb1; /* port B on PPI 1 */ UINT8 portc1; /* port C on PPI 1 */ /* display/decode circuit emulation */ UINT8 portselect; /* selection of which port to access */ UINT8 display[2][20]; /* display lines */ UINT8 dispindex; /* index within the display line */ UINT8 vbi[7*3]; /* VBI data */ UINT8 vbiready; /* VBI ready flag */ UINT8 vbiindex; /* index within the VBI data */ }; /*************************************************************************** FUNCTION PROTOTYPES ***************************************************************************/ static void ldv1000_init(laserdisc_state *ld); static void ldv1000_vsync(laserdisc_state *ld, const vbi_metadata *vbi, int fieldnum, attotime curtime); static INT32 ldv1000_update(laserdisc_state *ld, const vbi_metadata *vbi, int fieldnum, attotime curtime); static void ldv1000_data_w(laserdisc_state *ld, UINT8 prev, UINT8 data); static UINT8 ldv1000_status_strobe_r(laserdisc_state *ld); static UINT8 ldv1000_command_strobe_r(laserdisc_state *ld); static UINT8 ldv1000_status_r(laserdisc_state *ld); static TIMER_CALLBACK( vsync_off ); static TIMER_CALLBACK( vbi_data_fetch ); static TIMER_DEVICE_CALLBACK( multijump_timer ); static void ctc_interrupt(device_t *device, int state); static WRITE8_HANDLER( decoder_display_port_w ); static READ8_HANDLER( decoder_display_port_r ); static READ8_HANDLER( controller_r ); static WRITE8_HANDLER( controller_w ); static WRITE8_DEVICE_HANDLER( ppi0_porta_w ); static READ8_DEVICE_HANDLER( ppi0_portb_r ); static READ8_DEVICE_HANDLER( ppi0_portc_r ); static WRITE8_DEVICE_HANDLER( ppi0_portc_w ); static READ8_DEVICE_HANDLER( ppi1_porta_r ); static WRITE8_DEVICE_HANDLER( ppi1_portb_w ); static WRITE8_DEVICE_HANDLER( ppi1_portc_w ); /*************************************************************************** LD-V1000 ROM AND MACHINE INTERFACES ***************************************************************************/ static ADDRESS_MAP_START( ldv1000_map, ADDRESS_SPACE_PROGRAM, 8 ) AM_RANGE(0x0000, 0x1fff) AM_MIRROR(0x6000) AM_ROM AM_RANGE(0x8000, 0x87ff) AM_MIRROR(0x3800) AM_RAM AM_RANGE(0xc000, 0xc003) AM_MIRROR(0x9ff0) AM_DEVREADWRITE("ldvppi0", ppi8255_r, ppi8255_w) AM_RANGE(0xc004, 0xc007) AM_MIRROR(0x9ff0) AM_DEVREADWRITE("ldvppi1", ppi8255_r, ppi8255_w) ADDRESS_MAP_END static ADDRESS_MAP_START( ldv1000_portmap, ADDRESS_SPACE_IO, 8 ) ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x07) AM_MIRROR(0x38) AM_READWRITE(decoder_display_port_r, decoder_display_port_w) AM_RANGE(0x40, 0x40) AM_MIRROR(0x3f) AM_READ(controller_r) AM_RANGE(0x80, 0x80) AM_MIRROR(0x3f) AM_WRITE(controller_w) AM_RANGE(0xc0, 0xc3) AM_MIRROR(0x3c) AM_DEVREADWRITE("ldvctc", z80ctc_r, z80ctc_w) ADDRESS_MAP_END static const ppi8255_interface ppi0intf = { DEVCB_NULL, DEVCB_HANDLER(ppi0_portb_r), DEVCB_HANDLER(ppi0_portc_r), DEVCB_HANDLER(ppi0_porta_w), DEVCB_NULL, DEVCB_HANDLER(ppi0_portc_w) }; static const ppi8255_interface ppi1intf = { DEVCB_HANDLER(ppi1_porta_r), DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_HANDLER(ppi1_portb_w), DEVCB_HANDLER(ppi1_portc_w) }; static Z80CTC_INTERFACE( ctcintf ) { 0, DEVCB_LINE(ctc_interrupt), DEVCB_NULL, DEVCB_NULL, DEVCB_NULL }; static const z80_daisy_config daisy_chain[] = { { "ldvctc" }, { NULL } }; static MACHINE_CONFIG_FRAGMENT( ldv1000 ) MCFG_CPU_ADD("ldv1000", Z80, XTAL_5MHz/2) MCFG_CPU_CONFIG(daisy_chain) MCFG_CPU_PROGRAM_MAP(ldv1000_map) MCFG_CPU_IO_MAP(ldv1000_portmap) MCFG_Z80CTC_ADD("ldvctc", XTAL_5MHz/2 /* same as "ldv1000" */, ctcintf) MCFG_PPI8255_ADD("ldvppi0", ppi0intf) MCFG_PPI8255_ADD("ldvppi1", ppi1intf) MCFG_TIMER_ADD("multitimer", multijump_timer) MACHINE_CONFIG_END ROM_START( ldv1000 ) ROM_REGION( 0x2000, "ldv1000", ROMREGION_LOADBYNAME ) ROM_LOAD( "z03_1001_vyw-053_v1-0.bin", 0x0000, 0x2000, CRC(31ec4687) SHA1(52f91c304a878ba02b2fa1cda1a9489d6dd5a34f) ) ROM_END /*************************************************************************** INTERFACES ***************************************************************************/ const ldplayer_interface ldv1000_interface = { LASERDISC_TYPE_PIONEER_LDV1000, /* type of the player */ sizeof(ldplayer_data), /* size of the state */ "Pioneer LD-V1000", /* name of the player */ "ldv1000", /* shortname of the player */ ROM_NAME(ldv1000), /* pointer to ROM region information */ MACHINE_CONFIG_NAME(ldv1000), /* pointer to machine configuration */ ldv1000_init, /* initialization callback */ ldv1000_vsync, /* vsync callback */ ldv1000_update, /* update callback */ NULL, /* overlay callback */ ldv1000_data_w, /* parallel data write */ { /* single line write: */ NULL, /* LASERDISC_LINE_ENTER */ NULL /* LASERDISC_LINE_CONTROL */ }, ldv1000_status_r, /* parallel data read */ { /* single line read: */ NULL, /* LASERDISC_LINE_READY */ ldv1000_status_strobe_r, /* LASERDISC_LINE_STATUS */ ldv1000_command_strobe_r, /* LASERDISC_LINE_COMMAND */ NULL, /* LASERDISC_LINE_DATA_AVAIL */ } }; /*************************************************************************** PIONEER LD-V1000 IMPLEMENTATION ***************************************************************************/ /*------------------------------------------------- ldv1000_init - player-specific initialization -------------------------------------------------*/ static void ldv1000_init(laserdisc_state *ld) { astring tempstring; ldplayer_data *player = ld->player; /* reset our state */ memset(player, 0, sizeof(*player)); /* find our devices */ player->cpu = ld->device->subdevice("ldv1000"); player->ctc = ld->device->subdevice("ldvctc"); player->multitimer = downcast(ld->device->subdevice("multitimer")); player->multitimer->set_ptr(ld); } /*------------------------------------------------- ldv1000_vsync - VSYNC callback, called at the start of the blanking period -------------------------------------------------*/ static void ldv1000_vsync(laserdisc_state *ld, const vbi_metadata *vbi, int fieldnum, attotime curtime) { slider_position sliderpos = ldcore_get_slider_position(ld); ldplayer_data *player = ld->player; /* generate interrupts if we hit the edges */ z80ctc_trg1_w(player->ctc, sliderpos == SLIDER_MINIMUM); z80ctc_trg2_w(player->ctc, sliderpos == SLIDER_MAXIMUM); /* signal VSYNC and set a timer to turn it off */ player->vsync = TRUE; ld->device->machine->scheduler().timer_set(ld->screen->scan_period() * 4, FUNC(vsync_off), 0, ld); /* also set a timer to fetch the VBI data when it is ready */ ld->device->machine->scheduler().timer_set(ld->screen->time_until_pos(19*2), FUNC(vbi_data_fetch), 0, ld); /* boost interleave for the first 1ms to improve communications */ ld->device->machine->scheduler().boost_interleave(attotime::zero, attotime::from_msec(1)); } /*------------------------------------------------- ldv1000_update - update callback, called on the first visible line of the frame -------------------------------------------------*/ static INT32 ldv1000_update(laserdisc_state *ld, const vbi_metadata *vbi, int fieldnum, attotime curtime) { if (LOG_FRAMES_SEEN) { int frame = frame_from_metadata(vbi); if (frame != FRAME_NOT_PRESENT) printf("== %d\n", frame); } return fieldnum; } /*------------------------------------------------- ldv1000_data_w - handle a parallel data write to the LD-V1000 -------------------------------------------------*/ static void ldv1000_data_w(laserdisc_state *ld, UINT8 prev, UINT8 data) { ld->player->command = data; if (LOG_COMMANDS) printf("-> COMMAND = %02X (%s)\n", data, (ld->player->portc1 & 0x10) ? "valid" : "invalid"); } /*------------------------------------------------- ldv1000_status_strobe_r - return state of the status strobe -------------------------------------------------*/ static UINT8 ldv1000_status_strobe_r(laserdisc_state *ld) { return (ld->player->portc1 & 0x20) ? ASSERT_LINE : CLEAR_LINE; } /*------------------------------------------------- ldv1000_command_strobe_r - return state of the command strobe -------------------------------------------------*/ static UINT8 ldv1000_command_strobe_r(laserdisc_state *ld) { return (ld->player->portc1 & 0x10) ? ASSERT_LINE : CLEAR_LINE; } /*------------------------------------------------- ldv1000_status_r - handle a parallel data read from the LD-V1000 -------------------------------------------------*/ static UINT8 ldv1000_status_r(laserdisc_state *ld) { return ld->player->status; } /*------------------------------------------------- vsync_off - timer callback to clear the VSYNC flag -------------------------------------------------*/ static TIMER_CALLBACK( vsync_off ) { laserdisc_state *ld = (laserdisc_state *)ptr; ld->player->vsync = FALSE; } /*------------------------------------------------- vbi_data_fetch - timer callback to update the VBI data in the PIA as soon as it is ready; this must happy early in the frame because the player logic relies on fetching it here -------------------------------------------------*/ static TIMER_CALLBACK( vbi_data_fetch ) { laserdisc_state *ld = (laserdisc_state *)ptr; ldplayer_data *player = ld->player; UINT8 focus_on = !(player->portb1 & 0x01); UINT8 laser_on = (player->portb1 & 0x40); UINT32 lines[3]; /* appears to return data in reverse order */ lines[0] = laserdisc_get_field_code(ld->device, LASERDISC_CODE_LINE1718, FALSE); lines[1] = laserdisc_get_field_code(ld->device, LASERDISC_CODE_LINE17, FALSE); lines[2] = laserdisc_get_field_code(ld->device, LASERDISC_CODE_LINE16, FALSE); /* fill in the details */ memset(player->vbi, 0, sizeof(player->vbi)); if (focus_on && laser_on) { int line; /* loop over lines */ for (line = 0; line < 3; line++) { UINT8 *dest = &player->vbi[line * 7]; UINT32 data = lines[line]; /* the logic only processes leadin/leadout/frame number codes */ if (data == VBI_CODE_LEADIN || data == VBI_CODE_LEADOUT || (data & VBI_MASK_CAV_PICTURE) == VBI_CODE_CAV_PICTURE) { *dest++ = 0x09 | (((data & VBI_MASK_CAV_PICTURE) == VBI_CODE_CAV_PICTURE) ? 0x02 : 0x00); *dest++ = 0x08; *dest++ = (data >> 16) & 0x0f; *dest++ = (data >> 12) & 0x0f; *dest++ = (data >> 8) & 0x0f; *dest++ = (data >> 4) & 0x0f; *dest++ = (data >> 0) & 0x0f; } } } /* signal that data is ready and reset the readback index */ player->vbiready = TRUE; player->vbiindex = 0; } /*------------------------------------------------- multijump_timer - called once for each track in a multijump sequence; we decrement the down counter and autostop when we hit 0 -------------------------------------------------*/ static TIMER_DEVICE_CALLBACK( multijump_timer ) { laserdisc_state *ld = (laserdisc_state *)ptr; ldplayer_data *player = ld->player; int direction; /* bit 5 of port B on PPI 1 selects the direction of slider movement */ direction = (player->portb1 & 0x20) ? 1 : -1; ldcore_advance_slider(ld, direction); /* update down counter and reschedule */ if (--player->counter != 0) timer.adjust(MULTIJUMP_TRACK_TIME); } /*------------------------------------------------- ctc_interrupt - called when the CTC triggers an interrupt in the daisy chain -------------------------------------------------*/ static WRITE_LINE_DEVICE_HANDLER( ctc_interrupt ) { laserdisc_state *ld = ldcore_get_safe_token(device->owner()); if (ld->player->cpu != NULL) cpu_set_input_line(ld->player->cpu, 0, state ? ASSERT_LINE : CLEAR_LINE); } /*------------------------------------------------- decoder_display_port_w - handle writes to the decoder/display chips -------------------------------------------------*/ static WRITE8_HANDLER( decoder_display_port_w ) { /* TX/RX = /A0 (A0=0 -> TX, A0=1 -> RX) Display is 6-bit Decoder is 4-bit */ laserdisc_state *ld = ldcore_get_safe_token(space->cpu->owner()); ldplayer_data *player = ld->player; /* writes to offset 0 select the target for reads/writes of actual data */ if (offset == 0) { player->portselect = data; player->dispindex = 0; } /* writes to offset 2 constitute actual writes targeted toward the display and decoder chips */ else if (offset == 2) { /* selections 0 and 1 represent the two display lines; only 6 bits are transferred */ if (player->portselect < 2) player->display[player->portselect][player->dispindex++ % 20] = data & 0x3f; } } /*------------------------------------------------- decoder_display_port_r - handle reads from the decoder/display chips -------------------------------------------------*/ static READ8_HANDLER( decoder_display_port_r ) { laserdisc_state *ld = ldcore_get_safe_token(space->cpu->owner()); ldplayer_data *player = ld->player; UINT8 result = 0; /* reads from offset 3 constitute actual reads from the display and decoder chips */ if (offset == 3) { /* selection 4 represents the VBI data reading */ if (player->portselect == 4) { player->vbiready = FALSE; result = player->vbi[player->vbiindex++ % ARRAY_LENGTH(player->vbi)]; } } return result; } /*------------------------------------------------- controller_r - handle read of the data from the controlling system -------------------------------------------------*/ static READ8_HANDLER( controller_r ) { laserdisc_state *ld = ldcore_get_safe_token(space->cpu->owner()); /* note that this is a cheesy implementation; the real thing relies on exquisite timing */ UINT8 result = ld->player->command ^ 0xff; ld->player->command = 0xff; return result; } /*------------------------------------------------- controller_w - handle status latch writes -------------------------------------------------*/ static WRITE8_HANDLER( controller_w ) { laserdisc_state *ld = ldcore_get_safe_token(space->cpu->owner()); if (LOG_STATUS_CHANGES && data != ld->player->status) printf("%04X:CONTROLLER.W=%02X\n", cpu_get_pc(space->cpu), data); ld->player->status = data; } /*------------------------------------------------- ppi0_porta_w - handle writes to port A of PPI #0 -------------------------------------------------*/ static WRITE8_DEVICE_HANDLER( ppi0_porta_w ) { laserdisc_state *ld = ldcore_get_safe_token(device->owner()); ld->player->counter_start = data; if (LOG_PORT_IO) printf("%s:PORTA.0=%02X\n", device->machine->describe_context(), data); } /*------------------------------------------------- ppi0_portb_r - handle reads from port B of PPI #0 -------------------------------------------------*/ static READ8_DEVICE_HANDLER( ppi0_portb_r ) { laserdisc_state *ld = ldcore_get_safe_token(device->owner()); return ld->player->counter; } /*------------------------------------------------- ppi0_portc_r - handle reads from port C of PPI #0 -------------------------------------------------*/ static READ8_DEVICE_HANDLER( ppi0_portc_r ) { /* $10 = /VSYNC $20 = IRQ from decoder chip $40 = TRKG LOOP (N24-1) $80 = DUMP (N20-1) -- code reads the state and waits for it to change */ laserdisc_state *ld = ldcore_get_safe_token(device->owner()); ldplayer_data *player = ld->player; UINT8 result = 0x00; if (!player->vsync) result |= 0x10; if (!player->vbiready) result |= 0x20; return result; } /*------------------------------------------------- ppi0_portc_w - handle writes to port C of PPI #0 -------------------------------------------------*/ static WRITE8_DEVICE_HANDLER( ppi0_portc_w ) { /* $01 = preload on up/down counters $02 = /MULTI JUMP TRIG $04 = SCAN MODE $08 = n/c */ laserdisc_state *ld = ldcore_get_safe_token(device->owner()); ldplayer_data *player = ld->player; UINT8 prev = player->portc0; /* set the new value */ player->portc0 = data; if (LOG_PORT_IO && ((data ^ prev) & 0x0f) != 0) { printf("%s:PORTC.0=%02X", device->machine->describe_context(), data); if (data & 0x01) printf(" PRELOAD"); if (!(data & 0x02)) printf(" /MULTIJUMP"); if (data & 0x04) printf(" SCANMODE"); printf("\n"); } /* on the rising edge of bit 0, clock the down counter load */ if ((data & 0x01) && !(prev & 0x01)) player->counter = player->counter_start; /* on the falling edge of bit 1, start the multi-jump timer */ if (!(data & 0x02) && (prev & 0x02)) player->multitimer->adjust(MULTIJUMP_TRACK_TIME); } /*------------------------------------------------- ppi1_porta_r - handle reads from port A of PPI #1 -------------------------------------------------*/ static READ8_DEVICE_HANDLER( ppi1_porta_r ) { /* $01 = /FOCS LOCK $02 = /SPDL LOCK $04 = INSIDE $08 = OUTSIDE $10 = MOTOR STOP $20 = +5V/test point $40 = /INT LOCK $80 = 8 INCH CHK */ laserdisc_state *ld = ldcore_get_safe_token(device->owner()); ldplayer_data *player = ld->player; slider_position sliderpos = ldcore_get_slider_position(ld); UINT8 focus_on = !(player->portb1 & 0x01); UINT8 spdl_on = !(player->portb1 & 0x02); UINT8 result = 0x00; /* bit 0: /FOCUS LOCK */ if (!focus_on) result |= 0x01; /* bit 1: /SPDL LOCK */ if (!spdl_on) result |= 0x02; /* bit 2: INSIDE signal */ if (sliderpos == SLIDER_MINIMUM) result |= 0x04; /* bit 3: OUTSIDE signal */ if (sliderpos == SLIDER_MAXIMUM) result |= 0x08; /* bit 4: MOTOR STOP */ /* bit 5: +5V/test point */ result |= 0x20; /* bit 6: /INT LOCK */ /* bit 7: 8 INCH CHK */ return result; } /*------------------------------------------------- ppi1_portb_w - handle writes to port B of PPI #1 -------------------------------------------------*/ static WRITE8_DEVICE_HANDLER( ppi1_portb_w ) { /* $01 = /FOCS ON $02 = /SPDL RUN $04 = /JUMP TRIG $08 = /SCAN A $10 = SCAN B $20 = SCAN C $40 = /LASER ON $80 = /SYNC ST0 */ laserdisc_state *ld = ldcore_get_safe_token(device->owner()); ldplayer_data *player = ld->player; UINT8 prev = player->portb1; int direction; /* set the new value */ player->portb1 = data; if (LOG_PORT_IO && ((data ^ prev) & 0xff) != 0) { printf("%s:PORTB.1=%02X:", device->machine->describe_context(), data); if (!(data & 0x01)) printf(" FOCSON"); if (!(data & 0x02)) printf(" SPDLRUN"); if (!(data & 0x04)) printf(" JUMPTRIG"); if (!(data & 0x08)) printf(" SCANA (%c %c)", (data & 0x10) ? 'L' : 'H', (data & 0x20) ? 'F' : 'R'); if ( (data & 0x40)) printf(" LASERON"); if (!(data & 0x80)) printf(" SYNCST0"); printf("\n"); } /* bit 5 selects the direction of slider movement for JUMP TRG and scanning */ direction = (data & 0x20) ? 1 : -1; /* on the falling edge of bit 2, jump one track in either direction */ if (!(data & 0x04) && (prev & 0x04)) ldcore_advance_slider(ld, direction); /* bit 3 low enables scanning */ if (!(data & 0x08)) { /* bit 4 selects the speed */ int delta = (data & 0x10) ? SCAN_SPEED : SEEK_FAST_SPEED; ldcore_set_slider_speed(ld, delta * direction); } /* bit 3 high stops scanning */ else ldcore_set_slider_speed(ld, 0); } /*------------------------------------------------- ppi1_portc_w - handle writes to port C of PPI #1 -------------------------------------------------*/ static WRITE8_DEVICE_HANDLER( ppi1_portc_w ) { /* $01 = AUD 1 $02 = AUD 2 $04 = AUDIO ENABLE $08 = /VIDEO SQ $10 = COMMAND $20 = STATUS $40 = SIZE 8/12 $80 = /LED CAV */ laserdisc_state *ld = ldcore_get_safe_token(device->owner()); ldplayer_data *player = ld->player; UINT8 prev = player->portc1; /* set the new value */ player->portc1 = data; if (LOG_PORT_IO && ((data ^ prev) & 0xcf) != 0) { printf("%s:PORTC.1=%02X", device->machine->describe_context(), data); if (data & 0x01) printf(" AUD1"); if (data & 0x02) printf(" AUD2"); if (data & 0x04) printf(" AUDEN"); if (!(data & 0x08)) printf(" VIDEOSQ"); if (data & 0x10) printf(" COMMAND"); if (data & 0x20) printf(" STATUS"); if (data & 0x40) printf(" SIZE8"); if (!(data & 0x80)) printf(" CAV"); printf("\n"); } /* video squelch is controlled by bit 3 */ ldcore_set_video_squelch(ld, (data & 0x08) == 0); /* audio squelch is controlled by bits 0-2 */ ldcore_set_audio_squelch(ld, !(data & 0x04) || !(data & 0x01), !(data & 0x04) || !(data & 0x02)); }