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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/*************************************************************************
ldvp931.h
Philips 22VP931 laserdisc emulation.
*************************************************************************/
#pragma once
#ifndef __LDVP931_H__
#define __LDVP931_H__
#include "laserdsc.h"
#include "cpu/mcs48/mcs48.h"
//**************************************************************************
// DEVICE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_LASERDISC_22VP931_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, PHILLIPS_22VP931, 0)
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// device type definition
extern const device_type PHILLIPS_22VP931;
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> phillips_22vp931_device
// base _22vp931 class
class phillips_22vp931_device : public laserdisc_device
{
public:
// types
typedef delegate<void (phillips_22vp931_device &, int)> data_ready_delegate;
// construction/destruction
phillips_22vp931_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// input and output
void data_w(uint8_t data) { synchronize(TID_DEFERRED_DATA, data); }
void reset_w(uint8_t data);
uint8_t data_r();
uint8_t ready_r() { return m_fromcontroller_pending ? CLEAR_LINE : ASSERT_LINE; }
uint8_t data_available_r() { return m_tocontroller_pending ? ASSERT_LINE : CLEAR_LINE; }
// configuration
void set_data_ready_callback(data_ready_delegate callback) { m_data_ready = callback; }
protected:
// timer IDs
enum
{
TID_IRQ_OFF = TID_FIRST_PLAYER_TIMER,
TID_DATA_STROBE_OFF,
TID_ERP_OFF,
TID_HALF_TRACK,
TID_VBI_DATA_FETCH,
TID_DEFERRED_DATA
};
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
virtual const tiny_rom_entry *device_rom_region() const override;
virtual machine_config_constructor device_mconfig_additions() const 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 { }
public:
// internal read/write handlers
DECLARE_WRITE8_MEMBER( i8049_output0_w );
DECLARE_WRITE8_MEMBER( i8049_output1_w );
DECLARE_WRITE8_MEMBER( i8049_lcd_w );
DECLARE_READ8_MEMBER( i8049_unknown_r );
DECLARE_READ8_MEMBER( i8049_keypad_r );
DECLARE_READ8_MEMBER( i8049_datic_r );
DECLARE_READ8_MEMBER( i8049_from_controller_r );
DECLARE_WRITE8_MEMBER( i8049_to_controller_w );
DECLARE_READ8_MEMBER( i8049_port1_r );
DECLARE_WRITE8_MEMBER( i8049_port1_w );
DECLARE_READ8_MEMBER( i8049_port2_r );
DECLARE_WRITE8_MEMBER( i8049_port2_w );
DECLARE_READ8_MEMBER( i8049_t0_r );
DECLARE_READ8_MEMBER( i8049_t1_r );
protected:
// internal state
required_device<i8049_device> m_i8049_cpu; // CPU index of the 8049
emu_timer * m_tracktimer; // timer device
data_ready_delegate m_data_ready; // data ready callback
// I/O port states
uint8_t m_i8049_out0; // output 0 state
uint8_t m_i8049_out1; // output 1 state
uint8_t m_i8049_port1; // port 1 state
// DATIC circuit implementation
uint8_t m_daticval; // latched DATIC value
uint8_t m_daticerp; // /ERP value from DATIC
uint8_t m_datastrobe; // DATA STROBE line from DATIC
// communication status
uint8_t m_reset_state; // state of the reset input
uint8_t m_fromcontroller; // command byte from the controller
bool m_fromcontroller_pending; // true if data is pending
uint8_t m_tocontroller; // command byte to the controller
bool m_tocontroller_pending; // true if data is pending
// tracking
int8_t m_trackdir; // direction of tracking
uint8_t m_trackstate; // state of tracking
// debugging
uint8_t m_cmdbuf[3]; // 3 bytes worth of commands
uint8_t m_cmdcount; // number of command bytes seen
int16_t m_advanced; // number of frames advanced
};
#endif
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