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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/*************************************************************************
ldpr8210.h
Pioneer PR-8210 laserdisc emulation.
*************************************************************************/
#ifndef MAME_MACHINE_LDPR8210_H
#define MAME_MACHINE_LDPR8210_H
#pragma once
#include "laserdsc.h"
#include "cpu/mcs48/mcs48.h"
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// device type definition
DECLARE_DEVICE_TYPE(PIONEER_PR8210, pioneer_pr8210_device)
DECLARE_DEVICE_TYPE(SIMUTREK_SPECIAL, simutrek_special_device)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> pioneer_pr8210_device
// base pr8210 class
class pioneer_pr8210_device : public laserdisc_device
{
public:
// construction/destruction
pioneer_pr8210_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
// input and output
void control_w(uint8_t data);
protected:
pioneer_pr8210_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual const tiny_rom_entry *device_rom_region() const override;
virtual void device_add_mconfig(machine_config &config) override;
// subclass overrides
virtual void player_vsync(const vbi_metadata &vbi, int fieldnum, const attotime &curtime) override;
virtual int32_t player_update(const vbi_metadata &vbi, int fieldnum, const attotime &curtime) override;
virtual void player_overlay(bitmap_yuy16 &bitmap) override;
// internal helpers
TIMER_CALLBACK_MEMBER(process_vbi_data);
TIMER_CALLBACK_MEMBER(vsync_off);
bool focus_on() const { return !(m_i8049_port1 & 0x08); }
bool spdl_on() const { return !(m_i8049_port1 & 0x10); }
bool laser_on() const { return !(m_i8049_port2 & 0x01); }
virtual bool override_control() const { return false; }
void update_video_squelch() { set_video_squelch((m_i8049_port1 & 0x20) != 0); }
virtual void update_audio_squelch() { set_audio_squelch((m_i8049_port1 & 0x40) || !(m_pia.portb & 0x01), (m_i8049_port1 & 0x40) || !(m_pia.portb & 0x02)); }
// internal read/write handlers
uint8_t i8049_pia_r(offs_t offset);
void i8049_pia_w(offs_t offset, uint8_t data);
uint8_t i8049_bus_r();
void i8049_port1_w(uint8_t data);
void i8049_port2_w(uint8_t data);
int i8049_t0_r();
int i8049_t1_r();
// pioneer PIA subclass
class pioneer_pia
{
public:
uint8_t frame[7]; // (20-26) 7 characters for the chapter/frame
uint8_t text[17]; // (20-30) 17 characters for the display
uint8_t control; // (40) control lines
uint8_t latchdisplay; // flag: set if the display was latched
uint8_t portb; // (60) port B value (LEDs)
uint8_t display; // (80) display enable
uint8_t porta; // (A0) port A value (from serial decoder)
uint8_t vbi1; // (C0) VBI decoding state 1
uint8_t vbi2; // (E0) VBI decoding state 2
};
// internal overlay helpers
void overlay_draw_group(bitmap_yuy16 &bitmap, const uint8_t *text, int count, float xstart);
void overlay_erase(bitmap_yuy16 &bitmap, float xstart, float xend);
void overlay_draw_char(bitmap_yuy16 &bitmap, uint8_t ch, float xstart);
// LED outputs
output_finder<> m_audio1;
output_finder<> m_audio2;
output_finder<> m_clv;
output_finder<> m_cav;
output_finder<> m_srev;
output_finder<> m_sfwd;
output_finder<> m_play;
output_finder<> m_step;
output_finder<> m_pause;
output_finder<> m_standby;
// timers
emu_timer *m_process_vbi_timer;
emu_timer *m_vsync_off_timer;
// internal state
uint8_t m_control; // control line state
uint8_t m_lastcommand; // last command seen
uint16_t m_accumulator; // bit accumulator
attotime m_lastcommandtime; // time of the last command
attotime m_lastbittime; // time of last bit received
attotime m_firstbittime; // time of first bit in command
// low-level emulation data
required_device<i8049_device> m_i8049_cpu; // 8049 CPU device
attotime m_slowtrg; // time of the last SLOW TRG
pioneer_pia m_pia; // PIA state
bool m_vsync; // live VSYNC state
uint8_t m_i8049_port1; // 8049 port 1 state
uint8_t m_i8049_port2; // 8049 port 2 state
private:
void pr8210_portmap(address_map &map);
};
// ======================> simutrek_special_device
class simutrek_special_device : public pioneer_pr8210_device
{
public:
// construction/destruction
simutrek_special_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// input and output
void data_w(uint8_t data);
uint8_t ready_r() const { return !m_data_ready; }
uint8_t status_r() const { return ((m_i8748_port2 & 0x03) == 0x03) ? ASSERT_LINE : CLEAR_LINE; }
// external controls
void set_external_audio_squelch(int state);
protected:
// subclass overrides
virtual void player_vsync(const vbi_metadata &vbi, int fieldnum, const attotime &curtime) override;
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual const tiny_rom_entry *device_rom_region() const override;
virtual void device_add_mconfig(machine_config &config) override;
// internal helpers
virtual bool override_control() const override { return m_controlthis; }
virtual void update_audio_squelch() override { set_audio_squelch(m_audio_squelch, m_audio_squelch); }
private:
TIMER_CALLBACK_MEMBER(irq_off);
TIMER_CALLBACK_MEMBER(latch_data);
// internal read/write handlers
uint8_t i8748_data_r();
uint8_t i8748_port2_r();
void i8748_port2_w(uint8_t data);
int i8748_t0_r();
void simutrek_portmap(address_map &map);
// internal state
required_device<i8748_device> m_i8748_cpu;
emu_timer *m_irq_off_timer;
emu_timer *m_latch_data_timer;
uint8_t m_audio_squelch; // audio squelch value
uint8_t m_data; // parallel data for simutrek
bool m_data_ready; // ready flag for simutrek data
uint8_t m_i8748_port2; // 8748 port 2 state
uint8_t m_controlnext; // latch to control next pair of fields
uint8_t m_controlthis; // latched value for our control over the current pair of fields
};
#endif // MAME_MACHINE_LDPR8210_H
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