// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/*************************************************************************
ldpr8210.c
Pioneer PR-8210 laserdisc emulation.
**************************************************************************
Still to do:
* implement SLOW TRG
* figure out Simutrek without jump hack
* figure out serial protocol issues (current hack works nicely)
* determine actual slow/fast speeds
*************************************************************************/
#include "emu.h"
#include "ldpr8210.h"
//**************************************************************************
// DEBUGGING
//**************************************************************************
#define LOG_VBLANK_VBI 0
#define LOG_SERIAL 0
#define LOG_SIMUTREK 0
//**************************************************************************
// CONSTANTS
//**************************************************************************
// Overlay constants, related to 720-pixel wide capture
#define OVERLAY_GROUP0_X (82.0f / 720.0f)
#define OVERLAY_GROUP1_X (162.0f / 720.0f)
#define OVERLAY_GROUP2_X (322.0f / 720.0f)
#define OVERLAY_GROUP3_X (483.0f / 720.0f)
#define OVERLAY_Y (104/2)
#define OVERLAY_PIXEL_WIDTH (4.5f / 720.0f)
#define OVERLAY_PIXEL_HEIGHT 2
#define OVERLAY_X_PIXELS 5
#define OVERLAY_Y_PIXELS 7
// scanning speeds
#define SCAN_SPEED (2000 / 30) // 2000 frames/second
#define SEEK_FAST_SPEED (4000 / 30) // 4000 frames/second
// serial timing, mostly from the service manual, derived from the XTAL
#define SERIAL_CLOCK XTAL_455kHz
#define SERIAL_0_BIT_TIME attotime::from_hz((double)SERIAL_CLOCK / 512)
#define SERIAL_1_BIT_TIME attotime::from_hz((double)SERIAL_CLOCK / 1024)
#define SERIAL_MIDPOINT_TIME attotime::from_hz((double)SERIAL_CLOCK / 600)
#define SERIAL_MAX_BIT_TIME attotime::from_hz((double)SERIAL_CLOCK / 4096)
#define SERIAL_MAX_WORD_TIME attotime::from_hz((double)SERIAL_CLOCK / 11520)
#define SERIAL_REJECT_DUPLICATE_TIME attotime::from_hz((double)SERIAL_CLOCK / 11520 / 4)
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// devices
const device_type PIONEER_PR8210 = &device_creator<pioneer_pr8210_device>;
const device_type SIMUTREK_SPECIAL = &device_creator<simutrek_special_device>;
// bitmaps for the characters
static const UINT8 text_bitmap[0x40][7] =
{
{ 0 }, // @
{ 0x20,0x50,0x88,0x88,0xf8,0x88,0x88 }, // A
{ 0 }, // B
{ 0x70,0x88,0x80,0x80,0x80,0x88,0x70 }, // C
{ 0 }, // D
{ 0xf8,0x80,0x80,0xf0,0x80,0x80,0xf8 }, // E
{ 0xf8,0x80,0x80,0xf0,0x80,0x80,0x80 }, // F
{ 0 }, // G
{ 0x88,0x88,0x88,0xf8,0x88,0x88,0x88 }, // H
{ 0 }, // I
{ 0 }, // J
{ 0 }, // K
{ 0 }, // L
{ 0x88,0xd8,0xa8,0xa8,0xa8,0x88,0x88 }, // M
{ 0 }, // N
{ 0 }, // O
{ 0xf0,0x88,0x88,0xf0,0x80,0x80,0x80 }, // P
{ 0 }, // Q
{ 0xf0,0x88,0x88,0xf0,0xa0,0x90,0x88 }, // R
{ 0x70,0x88,0x80,0x70,0x08,0x88,0x70 }, // S
{ 0 }, // T
{ 0 }, // U
{ 0 }, // V
{ 0 }, // W
{ 0 }, // X
{ 0 }, // Y
{ 0 }, // Z
{ 0 }, // [
{ 0 }, // <backslash>
{ 0 }, // ]
{ 0 }, // ^
{ 0 }, // _
{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, // <space>
{ 0 }, // !
{ 0 }, // "
{ 0 }, // #
{ 0 }, // $
{ 0 }, // %
{ 0 }, // &
{ 0 }, // '
{ 0 }, // (
{ 0 }, // )
{ 0 }, // *
{ 0 }, // +
{ 0 }, // ,
{ 0 }, // -
{ 0x00,0x00,0x00,0x00,0x00,0x00,0x40 }, // .
{ 0 }, // /
{ 0x70,0x88,0x88,0x88,0x88,0x88,0x70 }, // 0
{ 0x20,0x60,0x20,0x20,0x20,0x20,0x70 }, // 1
{ 0x70,0x88,0x08,0x70,0x80,0x80,0xf8 }, // 2
{ 0xf8,0x08,0x10,0x30,0x08,0x88,0x70 }, // 3
{ 0x10,0x30,0x50,0x90,0xf8,0x10,0x10 }, // 4
{ 0xf8,0x80,0xf0,0x08,0x08,0x88,0x70 }, // 5
{ 0x78,0x80,0x80,0xf0,0x88,0x88,0x70 }, // 6
{ 0xf8,0x08,0x08,0x10,0x20,0x40,0x80 }, // 7
{ 0x70,0x88,0x88,0x70,0x88,0x88,0x70 }, // 8
{ 0x70,0x88,0x88,0x78,0x08,0x08,0xf0 }, // 9
{ 0 }, // :
{ 0 }, // ;
{ 0 }, // <
{ 0 }, // =
{ 0 }, // >
{ 0 } // ?
};
//**************************************************************************
// PR-8210 ROM AND MACHINE INTERFACES
//**************************************************************************
static ADDRESS_MAP_START( pr8210_portmap, AS_IO, 8, pioneer_pr8210_device )
AM_RANGE(0x00, 0xff) AM_READWRITE(i8049_pia_r, i8049_pia_w)
AM_RANGE(MCS48_PORT_BUS, MCS48_PORT_BUS) AM_READ(i8049_bus_r)
AM_RANGE(MCS48_PORT_P1, MCS48_PORT_P1) AM_WRITE(i8049_port1_w)
AM_RANGE(MCS48_PORT_P2, MCS48_PORT_P2) AM_WRITE(i8049_port2_w)
AM_RANGE(MCS48_PORT_T0, MCS48_PORT_T0) AM_READ(i8049_t0_r)
AM_RANGE(MCS48_PORT_T1, MCS48_PORT_T1) AM_READ(i8049_t1_r)
ADDRESS_MAP_END
static MACHINE_CONFIG_FRAGMENT( pr8210 )
MCFG_CPU_ADD("pr8210", I8049, XTAL_4_41MHz)
MCFG_CPU_IO_MAP(pr8210_portmap)
MACHINE_CONFIG_END
ROM_START( pr8210 )
ROM_REGION( 0x800, "pr8210", 0 )
ROM_LOAD( "pr-8210_mcu_ud6005a.bin", 0x000, 0x800, CRC(120fa83b) SHA1(b514326ca1f52d6d89056868f9d17eabd4e3f31d) )
ROM_END
//**************************************************************************
// PIONEER PR-8210 IMPLEMENTATION
//**************************************************************************
//-------------------------------------------------
// pioneer_pr8210_device - constructor
//-------------------------------------------------
pioneer_pr8210_device::pioneer_pr8210_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock)
: laserdisc_device(mconfig, PIONEER_PR8210, "Pioneer PR-8210", tag, owner, clock, "pr8210", __FILE__),
m_control(0),
m_lastcommand(0),
m_accumulator(0),
m_lastcommandtime(attotime::zero),
m_lastbittime(attotime::zero),
m_firstbittime(attotime::zero),
m_i8049_cpu(*this, "pr8210"),
m_slowtrg(attotime::zero),
m_vsync(false),
m_i8049_port1(0),
m_i8049_port2(0)
{
}
pioneer_pr8210_device::pioneer_pr8210_device(const machine_config &mconfig, device_type type, std::string name, std::string tag, device_t *owner, UINT32 clock, std::string shortname, std::string source)
: laserdisc_device(mconfig, type, name, tag, owner, clock, shortname, source),
m_control(0),
m_lastcommand(0),
m_accumulator(0),
m_lastcommandtime(attotime::zero),
m_lastbittime(attotime::zero),
m_firstbittime(attotime::zero),
m_i8049_cpu(*this, "pr8210"),
m_slowtrg(attotime::zero),
m_vsync(false),
m_i8049_port1(0),
m_i8049_port2(0)
{
}
//-------------------------------------------------
// control_w - write callback when the CONTROL
// line is toggled
//-------------------------------------------------
void pioneer_pr8210_device::control_w(UINT8 data)
{
// set the new value and remember the last
UINT8 prev = m_control;
m_control = data;
// handle rising edge
if (prev != ASSERT_LINE && data == ASSERT_LINE)
{
// get the time difference from the last assert
// and update our internal command time
attotime curtime = machine().time();
attotime delta = curtime - m_lastbittime;
m_lastbittime = curtime;
// if we timed out since the first bit, reset the accumulator
attotime overalldelta = curtime - m_firstbittime;
if (overalldelta > SERIAL_MAX_WORD_TIME || delta > SERIAL_MAX_BIT_TIME)
{
m_firstbittime = curtime;
m_accumulator = 0x5555;
if (LOG_SERIAL)
printf("Reset accumulator\n");
}
// 0 bit delta is 1.05 msec, 1 bit delta is 2.11 msec
int longpulse = (delta < SERIAL_MIDPOINT_TIME) ? 0 : 1;
m_accumulator = (m_accumulator << 1) | longpulse;
// log the deltas for debugging
if (LOG_SERIAL)
{
int usecdiff = (int)(delta.attoseconds() / ATTOSECONDS_IN_USEC(1));
printf("bitdelta = %5d (%d) - accum = %04X\n", usecdiff, longpulse, m_accumulator);
}
// if we have a complete command, signal it
// a complete command is 0,0,1 followed by 5 bits, followed by 0,0
if ((m_accumulator & 0x383) == 0x80)
{
// data is stored to the PIA in bit-reverse order
UINT8 newcommand = (m_accumulator >> 2) & 0x1f;
m_pia.porta = BITSWAP8(newcommand, 0,1,2,3,4,5,6,7);
// the MCU logic requires a 0 to execute many commands; however, nobody
// consistently sends a 0, whereas they do tend to send duplicate commands...
// if we assume that each duplicate causes a 0, we get the correct results
attotime rejectuntil = m_lastcommandtime + SERIAL_REJECT_DUPLICATE_TIME;
m_lastcommandtime = curtime;
if (m_pia.porta == m_lastcommand && curtime < rejectuntil)
m_pia.porta = 0x00;
else
m_lastcommand = m_pia.porta;
// log the command and wait for a keypress
if (LOG_SERIAL)
printf("--- Command = %02X\n", m_pia.porta >> 3);
// reset the first bit time so that the accumulator clears on the next write
m_firstbittime = curtime - SERIAL_MAX_WORD_TIME;
}
}
}
//-------------------------------------------------
// device_start - device initialization
//-------------------------------------------------
void pioneer_pr8210_device::device_start()
{
// pass through to the parent
laserdisc_device::device_start();
}
//-------------------------------------------------
// device_reset - device reset
//-------------------------------------------------
void pioneer_pr8210_device::device_reset()
{
// pass through to the parent
laserdisc_device::device_reset();
// reset our state
attotime curtime = machine().time();
m_lastcommandtime = curtime;
m_firstbittime = curtime;
m_lastbittime = curtime;
m_slowtrg = curtime;
}
//-------------------------------------------------
// device_timer - handle timers set by this
// device
//-------------------------------------------------
void pioneer_pr8210_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
// update the VBI data in the PIA as soon as it is ready;
// this must happen early in the frame because the player
// logic relies on fetching it here
case TID_VBI_DATA_FETCH:
// logging
if (LOG_VBLANK_VBI)
{
UINT32 line1718 = get_field_code(LASERDISC_CODE_LINE1718, FALSE);
if ((line1718 & VBI_MASK_CAV_PICTURE) == VBI_CODE_CAV_PICTURE)
printf("%3d:VBI(%05d)\n", screen().vpos(), VBI_CAV_PICTURE(line1718));
else
printf("%3d:VBI()\n", screen().vpos());
}
// update PIA registers based on vbi code
m_pia.vbi1 = 0xff;
m_pia.vbi2 = 0xff;
if (focus_on() && laser_on())
{
UINT32 line16 = get_field_code(LASERDISC_CODE_LINE16, FALSE);
UINT32 line1718 = get_field_code(LASERDISC_CODE_LINE1718, FALSE);
if (line1718 == VBI_CODE_LEADIN)
m_pia.vbi1 &= ~0x01;
if (line1718 == VBI_CODE_LEADOUT)
m_pia.vbi1 &= ~0x02;
if (line16 == VBI_CODE_STOP)
m_pia.vbi1 &= ~0x04;
// unsure what this bit means: m_pia.vbi1 &= ~0x08;
if ((line1718 & VBI_MASK_CAV_PICTURE) == VBI_CODE_CAV_PICTURE)
{
m_pia.vbi1 &= ~0x10;
m_pia.frame[2] = 0xf0 | ((line1718 >> 16) & 0x07);
m_pia.frame[3] = 0xf0 | ((line1718 >> 12) & 0x0f);
m_pia.frame[4] = 0xf0 | ((line1718 >> 8) & 0x0f);
m_pia.frame[5] = 0xf0 | ((line1718 >> 4) & 0x0f);
m_pia.frame[6] = 0xf0 | ((line1718 >> 0) & 0x0f);
}
if ((line1718 & VBI_MASK_CHAPTER) == VBI_CODE_CHAPTER)
{
m_pia.vbi2 &= ~0x01;
m_pia.frame[0] = 0xf0 | ((line1718 >> 16) & 0x07);
m_pia.frame[1] = 0xf0 | ((line1718 >> 12) & 0x0f);
}
}
break;
// clear the VSYNC flag
case TID_VSYNC_OFF:
m_vsync = false;
break;
// pass everything else onto the parent
default:
laserdisc_device::device_timer(timer, id, param, ptr);
break;
}
}
//-------------------------------------------------
// device_rom_region - return a pointer to our
// ROM region definitions
//-------------------------------------------------
const rom_entry *pioneer_pr8210_device::device_rom_region() const
{
return ROM_NAME(pr8210);
}
//-------------------------------------------------
// device_mconfig_additions - return a pointer to
// our machine config fragment
//-------------------------------------------------
machine_config_constructor pioneer_pr8210_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME(pr8210);
}
//-------------------------------------------------
// player_vsync - VSYNC callback, called at the
// start of the blanking period
//-------------------------------------------------
void pioneer_pr8210_device::player_vsync(const vbi_metadata &vbi, int fieldnum, const attotime &curtime)
{
// logging
if (LOG_VBLANK_VBI)
{
if ((vbi.line1718 & VBI_MASK_CAV_PICTURE) == VBI_CODE_CAV_PICTURE)
printf("%3d:VSYNC(%d,%05d)\n", screen().vpos(), fieldnum, VBI_CAV_PICTURE(vbi.line1718));
else
printf("%3d:VSYNC(%d)\n", screen().vpos(), fieldnum);
}
// signal VSYNC and set a timer to turn it off
m_vsync = true;
timer_set(screen().scan_period() * 4, TID_VSYNC_OFF);
// also set a timer to fetch the VBI data when it is ready
timer_set(screen().time_until_pos(19*2), TID_VBI_DATA_FETCH);
}
//-------------------------------------------------
// player_update - update callback, called on the
// first visible line of the frame
//-------------------------------------------------
INT32 pioneer_pr8210_device::player_update(const vbi_metadata &vbi, int fieldnum, const attotime &curtime)
{
// logging
if (LOG_VBLANK_VBI)
printf("%3d:Update(%d)\n", screen().vpos(), fieldnum);
// if the spindle is on, we advance by 1 track after completing field #1
return spdl_on() ? fieldnum : 0;
}
//-------------------------------------------------
// player_overlay - overlay callback, called
// during frame processing in update to overlay
// player data
//-------------------------------------------------
void pioneer_pr8210_device::player_overlay(bitmap_yuy16 &bitmap)
{
// custom display
if (m_pia.display)
{
overlay_draw_group(bitmap, &m_pia.text[2], 5, OVERLAY_GROUP1_X);
overlay_draw_group(bitmap, &m_pia.text[7], 5, OVERLAY_GROUP2_X);
overlay_draw_group(bitmap, &m_pia.text[12], 5, OVERLAY_GROUP3_X);
}
// chapter/frame display
else
{
// frame display
if (m_pia.latchdisplay & 2)
overlay_draw_group(bitmap, &m_pia.text[2], 5, OVERLAY_GROUP1_X);
// chapter overlay
if (m_pia.latchdisplay & 1)
overlay_draw_group(bitmap, &m_pia.text[0], 2, OVERLAY_GROUP0_X);
}
m_pia.latchdisplay = 0;
}
//-------------------------------------------------
// i8049_pia_r - handle reads from the mystery
// Pioneer PIA
//-------------------------------------------------
READ8_MEMBER( pioneer_pr8210_device::i8049_pia_r )
{
UINT8 result = 0xff;
switch (offset)
{
// (20-26) 7 characters for the chapter/frame
case 0x20: case 0x21:
case 0x22: case 0x23: case 0x24: case 0x25: case 0x26:
result = m_pia.frame[offset - 0x20];
break;
// (1D-1F,27) invalid read but normal
case 0x1d: case 0x1e: case 0x1f:
case 0x27:
break;
// (A0) port A value (from serial decoder)
case 0xa0:
result = m_pia.porta;
break;
// (C0) VBI decoding state 1
case 0xc0:
if (LOG_VBLANK_VBI)
printf("%3d:PIA(C0)\n", screen().vpos());
result = m_pia.vbi1;
break;
// (E0) VBI decoding state 2
case 0xe0:
if (LOG_VBLANK_VBI)
printf("%3d:PIA(E0)\n", screen().vpos());
result = m_pia.vbi2;
break;
default:
osd_printf_debug("%03X:Unknown PR-8210 PIA read from offset %02X\n", space.device().safe_pc(), offset);
break;
}
return result;
}
//-------------------------------------------------
// i8049_pia_w - handle writes to the mystery
// Pioneer PIA
//-------------------------------------------------
WRITE8_MEMBER( pioneer_pr8210_device::i8049_pia_w )
{
UINT8 value;
switch (offset)
{
// (20-30) 17 characters for the display
case 0x20: case 0x21:
case 0x22: case 0x23: case 0x24: case 0x25: case 0x26:
case 0x27: case 0x28: case 0x29: case 0x2a: case 0x2b:
case 0x2c: case 0x2d: case 0x2e: case 0x2f: case 0x30:
m_pia.text[offset - 0x20] = data;
break;
// (40) control lines
case 0x40:
// toggle bit 0 to latch chapter number into display area
if (!(data & 0x01) && (m_pia.control & 0x01))
{
memcpy(&m_pia.text[0], &m_pia.frame[0], 2);
m_pia.latchdisplay |= 1;
}
// toggle bit 1 to latch frame number into display area
if (!(data & 0x02) && (m_pia.control & 0x02))
{
memcpy(&m_pia.text[2], &m_pia.frame[2], 5);
m_pia.latchdisplay |= 2;
}
m_pia.control = data;
break;
// (60) port B value (LEDs)
case 0x60:
// these 4 are direct-connect
machine().output().set_value("pr8210_audio1", (data & 0x01) != 0);
machine().output().set_value("pr8210_audio2", (data & 0x02) != 0);
machine().output().set_value("pr8210_clv", (data & 0x04) != 0);
machine().output().set_value("pr8210_cav", (data & 0x08) != 0);
// remaining 3 bits select one of 5 LEDs via a mux
value = ((data & 0x40) >> 6) | ((data & 0x20) >> 4) | ((data & 0x10) >> 2);
machine().output().set_value("pr8210_srev", (value == 0));
machine().output().set_value("pr8210_sfwd", (value == 1));
machine().output().set_value("pr8210_play", (value == 2));
machine().output().set_value("pr8210_step", (value == 3));
machine().output().set_value("pr8210_pause", (value == 4));
m_pia.portb = data;
update_audio_squelch();
break;
// (80) display enable
case 0x80:
m_pia.display = data & 0x01;
break;
// no other writes known
default:
osd_printf_debug("%03X:Unknown PR-8210 PIA write to offset %02X = %02X\n", space.device().safe_pc(), offset, data);
break;
}
}
//-------------------------------------------------
// i8049_bus_r - handle reads from the 8049 BUS
// input, which is enabled via the PIA above
//-------------------------------------------------
READ8_MEMBER( pioneer_pr8210_device::i8049_bus_r )
{
/*
$80 = n/c
$40 = (in) slider pot interrupt source (slider position limit detector, inside and outside)
$20 = n/c
$10 = (in) /FOCUS LOCK
$08 = (in) /SPDL LOCK
$04 = (in) SIZE 8/12
$02 = (in) FG via op-amp (spindle motor stop detector)
$01 = (in) SLOW TIMER OUT
*/
UINT8 result = 0x00;
// bus bit 6: slider position limit detector, inside and outside
slider_position sliderpos = get_slider_position();
if (sliderpos != SLIDER_MINIMUM && sliderpos != SLIDER_MAXIMUM)
result |= 0x40;
// bus bit 4: /FOCUS LOCK
if (!focus_on())
result |= 0x10;
// bus bit 3: /SPDL LOCK
if (!spdl_on())
result |= 0x08;
// bus bit 1: spindle motor stop detector
if (!spdl_on())
result |= 0x02;
// bus bit 0: SLOW TIMER OUT
// loop at beginning waits for $40=0, $02=1
return result;
}
//-------------------------------------------------
// i8049_port1_w - handle writes to the 8049
// port #1
//-------------------------------------------------
WRITE8_MEMBER( pioneer_pr8210_device::i8049_port1_w )
{
/*
$80 = (out) SCAN C (F/R)
$40 = (out) AUDIO SQ
$20 = (out) VIDEO SQ
$10 = (out) /SPDL ON
$08 = (out) /FOCUS ON
$04 = (out) SCAN B (L/H)
$02 = (out) SCAN A (/SCAN)
$01 = (out) JUMP TRG (jump back trigger, clock on high->low)
*/
// set the new value
UINT8 prev = m_i8049_port1;
m_i8049_port1 = data;
// bit 7 selects the direction of slider movement for JUMP TRG and scanning
int direction = (data & 0x80) ? 1 : -1;
// on the falling edge of bit 0, jump one track in either direction
if (!(data & 0x01) && (prev & 0x01))
{
// special override for the Simutrek, which takes over control of this is some situations
if (!override_control())
{
if (LOG_SIMUTREK)
printf("%3d:JUMP TRG\n", screen().vpos());
advance_slider(direction);
}
else if (LOG_SIMUTREK)
printf("%3d:Skipped JUMP TRG\n", screen().vpos());
}
// bit 1 low enables scanning
if (!(data & 0x02))
{
// bit 2 selects the speed
int delta = (data & 0x04) ? SCAN_SPEED : SEEK_FAST_SPEED;
set_slider_speed(delta * direction);
}
// bit 1 high stops scanning
else
set_slider_speed(0);
// video squelch is controlled by bit 5; audio squelch is controlled by bit 6
update_video_squelch();
update_audio_squelch();
}
//-------------------------------------------------
// i8049_port2_w - handle writes to the 8049
// port #2
//-------------------------------------------------
WRITE8_MEMBER( pioneer_pr8210_device::i8049_port2_w )
{
/*
$80 = (out) /CS on PIA
$40 = (out) 0 to self-generate IRQ
$20 = (out) SLOW TRG
$10 = (out) STANDBY LED
$08 = (out) TP2
$04 = (out) TP1
$02 = (out) ???
$01 = (out) LASER ON
*/
// set the new value
UINT8 prev = m_i8049_port2;
m_i8049_port2 = data;
// on the falling edge of bit 5, start the slow timer
if (!(data & 0x20) && (prev & 0x20))
m_slowtrg = machine().time();
// bit 6 when low triggers an IRQ on the MCU
m_i8049_cpu->set_input_line(MCS48_INPUT_IRQ, (data & 0x40) ? CLEAR_LINE : ASSERT_LINE);
// standby LED is set accordingl to bit 4
machine().output().set_value("pr8210_standby", (data & 0x10) != 0);
}
//-------------------------------------------------
// i8049_t0_r - return the state of the 8049
// T0 input (connected to VSYNC)
//-------------------------------------------------
READ8_MEMBER( pioneer_pr8210_device::i8049_t0_r )
{
// returns VSYNC state
return !m_vsync;
}
//-------------------------------------------------
// i8049_t1_r - return the state of the 8049
// T1 input (pulled high)
//-------------------------------------------------
READ8_MEMBER( pioneer_pr8210_device::i8049_t1_r )
{
return 1;
}
//-------------------------------------------------
// overlay_draw_group - draw a single group of
// characters
//-------------------------------------------------
void pioneer_pr8210_device::overlay_draw_group(bitmap_yuy16 &bitmap, const UINT8 *text, int count, float xstart)
{
// rease the background
overlay_erase(bitmap, xstart, xstart + ((OVERLAY_X_PIXELS + 1) * count + 1) * OVERLAY_PIXEL_WIDTH);
// draw each character, suppressing leading 0's
bool skip = true;
for (int x = 0; x < count; x++)
if (!skip || x == count - 1 || (text[x] & 0x3f) != 0x30)
{
skip = false;
overlay_draw_char(bitmap, text[x], xstart + ((OVERLAY_X_PIXELS + 1) * x + 1) * OVERLAY_PIXEL_WIDTH);
}
}
//-------------------------------------------------
// overlay_erase - erase the background area
// where the text overlay will be displayed
//-------------------------------------------------
void pioneer_pr8210_device::overlay_erase(bitmap_yuy16 &bitmap, float xstart, float xend)
{
UINT32 xmin = (UINT32)(xstart * 256.0f * float(bitmap.width()));
UINT32 xmax = (UINT32)(xend * 256.0f * float(bitmap.width()));
for (UINT32 y = OVERLAY_Y; y < (OVERLAY_Y + (OVERLAY_Y_PIXELS + 2) * OVERLAY_PIXEL_HEIGHT); y++)
{
UINT16 *dest = &bitmap.pix16(y, xmin >> 8);
UINT16 ymax = *dest >> 8;
UINT16 ymin = ymax * 3 / 8;
UINT16 yres = ymin + ((ymax - ymin) * (xmin & 0xff)) / 256;
*dest = (yres << 8) | (*dest & 0xff);
dest++;
for (UINT32 x = (xmin | 0xff) + 1; x < xmax; x += 0x100)
{
yres = (*dest >> 8) * 3 / 8;
*dest = (yres << 8) | (*dest & 0xff);
dest++;
}
ymax = *dest >> 8;
ymin = ymax * 3 / 8;
yres = ymin + ((ymax - ymin) * (~xmax & 0xff)) / 256;
*dest = (yres << 8) | (*dest & 0xff);
dest++;
}
}
//-------------------------------------------------
// overlay_draw_char - draw a single character
// of the text overlay
//-------------------------------------------------
void pioneer_pr8210_device::overlay_draw_char(bitmap_yuy16 &bitmap, UINT8 ch, float xstart)
{
UINT32 xminbase = (UINT32)(xstart * 256.0f * float(bitmap.width()));
UINT32 xsize = (UINT32)(OVERLAY_PIXEL_WIDTH * 256.0f * float(bitmap.width()));
// iterate over pixels
const UINT8 *chdataptr = &text_bitmap[ch & 0x3f][0];
for (UINT32 y = 0; y < OVERLAY_Y_PIXELS; y++)
{
UINT8 chdata = *chdataptr++;
for (UINT32 x = 0; x < OVERLAY_X_PIXELS; x++, chdata <<= 1)
if (chdata & 0x80)
{
UINT32 xmin = xminbase + x * xsize;
UINT32 xmax = xmin + xsize;
for (UINT32 yy = 0; yy < OVERLAY_PIXEL_HEIGHT; yy++)
{
UINT16 *dest = &bitmap.pix16(OVERLAY_Y + (y + 1) * OVERLAY_PIXEL_HEIGHT + yy, xmin >> 8);
UINT16 ymax = 0xff;
UINT16 ymin = *dest >> 8;
UINT16 yres = ymin + ((ymax - ymin) * (~xmin & 0xff)) / 256;
*dest = (yres << 8) | (*dest & 0xff);
dest++;
for (UINT32 xx = (xmin | 0xff) + 1; xx < xmax; xx += 0x100)
*dest++ = 0xf080;
ymax = 0xff;
ymin = *dest >> 8;
yres = ymin + ((ymax - ymin) * (xmax & 0xff)) / 256;
*dest = (yres << 8) | (*dest & 0xff);
dest++;
}
}
}
}
//**************************************************************************
// SIMUTREK ROM AND MACHINE INTERFACES
//**************************************************************************
static ADDRESS_MAP_START( simutrek_portmap, AS_IO, 8, simutrek_special_device )
AM_RANGE(0x00, 0xff) AM_READ(i8748_data_r)
AM_RANGE(MCS48_PORT_P2, MCS48_PORT_P2) AM_READWRITE(i8748_port2_r, i8748_port2_w)
AM_RANGE(MCS48_PORT_T0, MCS48_PORT_T0) AM_READ(i8748_t0_r)
ADDRESS_MAP_END
static MACHINE_CONFIG_FRAGMENT( simutrek )
MCFG_CPU_ADD("simutrek", I8748, XTAL_6MHz)
MCFG_CPU_IO_MAP(simutrek_portmap)
MCFG_FRAGMENT_ADD(pr8210)
MACHINE_CONFIG_END
ROM_START( simutrek )
ROM_REGION( 0x800, "pr8210", 0 )
ROM_LOAD( "pr-8210_mcu_ud6005a.bin", 0x000, 0x800, CRC(120fa83b) SHA1(b514326ca1f52d6d89056868f9d17eabd4e3f31d) )
ROM_REGION( 0x400, "simutrek", 0)
ROM_LOAD( "laser_player_interface_d8748_a308.bin", 0x0000, 0x0400, CRC(eed3e728) SHA1(1eb3467f1c41553375b2c21952cd593b167f5416) )
ROM_END
//**************************************************************************
// SIMUTREK IMPLEMENTATION
//**************************************************************************
//-------------------------------------------------
// simutrek_special_device - constructor
//-------------------------------------------------
simutrek_special_device::simutrek_special_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock)
: pioneer_pr8210_device(mconfig, SIMUTREK_SPECIAL, "Simutrek Modified PR-8210", tag, owner, clock, "simutrek", __FILE__),
m_i8748_cpu(*this, "simutrek"),
m_audio_squelch(0),
m_data(0),
m_data_ready(false),
m_i8748_port2(0),
m_controlnext(0),
m_controlthis(0)
{
}
//-------------------------------------------------
// data_w - write callback when the parallel data
// port is written to
//-------------------------------------------------
void simutrek_special_device::data_w(UINT8 data)
{
synchronize(TID_LATCH_DATA, data);
if (LOG_SIMUTREK)
printf("%03d:**** Simutrek Command = %02X\n", screen().vpos(), data);
}
//-------------------------------------------------
// set_external_audio_squelch - Simutrek-specific
// command to enable/disable audio squelch
//-------------------------------------------------
void simutrek_special_device::set_external_audio_squelch(int state)
{
if (LOG_SIMUTREK && m_audio_squelch != (state == 0))
printf("--> audio squelch = %d\n", state == 0);
m_audio_squelch = (state == 0);
update_audio_squelch();
}
//-------------------------------------------------
// player_vsync - VSYNC callback, called at the
// start of the blanking period
//-------------------------------------------------
void simutrek_special_device::player_vsync(const vbi_metadata &vbi, int fieldnum, const attotime &curtime)
{
// latch the control state after the second field
if (fieldnum == 1)
{
m_controlthis = m_controlnext;
m_controlnext = 0;
}
// call the parent
if (LOG_SIMUTREK)
printf("%3d:VSYNC(%d)\n", screen().vpos(), fieldnum);
pioneer_pr8210_device::player_vsync(vbi, fieldnum, curtime);
// process data
if (m_data_ready)
{
if (LOG_SIMUTREK)
printf("%3d:VSYNC IRQ\n", screen().vpos());
m_i8748_cpu->set_input_line(MCS48_INPUT_IRQ, ASSERT_LINE);
timer_set(screen().scan_period(), TID_IRQ_OFF);
}
}
//-------------------------------------------------
// device_start - device initialization
//-------------------------------------------------
void simutrek_special_device::device_start()
{
// pass through to the parent
pioneer_pr8210_device::device_start();
}
//-------------------------------------------------
// device_reset - device reset
//-------------------------------------------------
void simutrek_special_device::device_reset()
{
// standard PR-8210 initialization
pioneer_pr8210_device::device_reset();
// initialize the Simutrek state
// for proper synchronization of initial attract mode, this needs to be set
m_data_ready = true;
}
//-------------------------------------------------
// device_timer - handle timers set by this
// device
//-------------------------------------------------
void simutrek_special_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
// clear the 8748 IRQ
case TID_IRQ_OFF:
m_i8748_cpu->set_input_line(MCS48_INPUT_IRQ, CLEAR_LINE);
break;
// latch data
case TID_LATCH_DATA:
m_data = param;
m_data_ready = true;
break;
// pass everything else onto the parent
default:
pioneer_pr8210_device::device_timer(timer, id, param, ptr);
break;
}
}
//-------------------------------------------------
// device_rom_region - return a pointer to our
// ROM region definitions
//-------------------------------------------------
const rom_entry *simutrek_special_device::device_rom_region() const
{
return ROM_NAME(simutrek);
}
//-------------------------------------------------
// device_mconfig_additions - return a pointer to
// our machine config fragment
//-------------------------------------------------
machine_config_constructor simutrek_special_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME(simutrek);
}
//-------------------------------------------------
// i8748_port2_r - handle reads from the 8748
// port #2
//-------------------------------------------------
READ8_MEMBER( simutrek_special_device::i8748_port2_r )
{
// bit $80 is the pr8210 video squelch
return (m_i8049_port1 & 0x20) ? 0x00 : 0x80;
}
//-------------------------------------------------
// i8748_port2_w - handle writes to the 8748
// port #2
//-------------------------------------------------
WRITE8_MEMBER( simutrek_special_device::i8748_port2_w )
{
// update stat
UINT8 prev = m_i8748_port2;
m_i8748_port2 = data;
// bit $20 goes to the serial line
if ((data ^ prev) & 0x20)
pioneer_pr8210_device::control_w((data & 0x20) ? ASSERT_LINE : CLEAR_LINE);
// bit $10 goes to JUMP TRG
// bit $08 controls direction
if (!(data & 0x10) && (prev & 0x10))
{
int direction = (data & 0x08) ? 1 : -1;
if (LOG_SIMUTREK)
printf("%3d:JUMP TRG (Simutrek PC=%03X)\n", screen().vpos(), space.device().safe_pc());
advance_slider(direction);
}
// bit $04 controls who owns the JUMP TRG command
if (LOG_SIMUTREK && ((data ^ prev) & 0x04))
printf("%3d:Simutrek ownership line = %d (Simutrek PC=%03X)\n", screen().vpos(), (data >> 2) & 1, space.device().safe_pc());
m_controlnext = (~data >> 2) & 1;
// bits $03 control something (status?)
if (LOG_SIMUTREK && ((data ^ prev) & 0x03))
printf("Simutrek Status = %d\n", data & 0x03);
}
//-------------------------------------------------
// i8748_data_r - handle external 8748 data reads
//-------------------------------------------------
READ8_MEMBER( simutrek_special_device::i8748_data_r )
{
// acknowledge the read and clear the data ready flag
m_data_ready = false;
return m_data;
}
//-------------------------------------------------
// i8748_t0_r - return the status of the 8748
// T0 input
//-------------------------------------------------
READ8_MEMBER( simutrek_special_device::i8748_t0_r )
{
// return 1 if data is waiting from main CPU
return m_data_ready;
}