summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/machine/ldv1000.h
blob: 883bca49a71f8e9c0c621a18c78eb8567874f3ff (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/*************************************************************************

    ldv1000.h

    Pioneer LD-V1000 laserdisc emulation.

*************************************************************************/

#ifndef MAME_MACHINE_LDV1000_H
#define MAME_MACHINE_LDV1000_H

#pragma once

#include "laserdsc.h"
#include "cpu/z80/z80.h"
#include "cpu/mcs48/mcs48.h"
#include "machine/z80ctc.h"


//**************************************************************************
//  GLOBAL VARIABLES
//**************************************************************************

// device type definition
DECLARE_DEVICE_TYPE(PIONEER_LDV1000, pioneer_ldv1000_device)



//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> pioneer_ldv1000_device

// base ldv1000 class
class pioneer_ldv1000_device : public laserdisc_device
{
public:
	// construction/destruction
	pioneer_ldv1000_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);

	auto command_strobe_callback() { return m_command_strobe_cb.bind(); }

	// input and output
	void data_w(uint8_t data);
	void enter_w(uint8_t data);
	uint8_t status_r() const { return m_status; }
	uint8_t status_strobe_r() const { return (m_portc1 & 0x20) ? ASSERT_LINE : CLEAR_LINE; }
	uint8_t command_strobe_r() const { return (m_portc1 & 0x10) ? ASSERT_LINE : CLEAR_LINE; }

protected:
	// timer IDs
	enum
	{
		TID_MULTIJUMP = TID_FIRST_PLAYER_TIMER,
		TID_VSYNC_OFF,
		TID_VBI_DATA_FETCH
	};

	// 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 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 { }

private:
	// internal helpers
	bool focus_on() const { return !(m_portb1 & 0x01); }
	bool spdl_on() const { return !(m_portb1 & 0x02); }
	bool laser_on() const { return (m_portb1 & 0x40); }

	// internal read/write handlers
	DECLARE_WRITE8_MEMBER( z80_decoder_display_port_w );
	DECLARE_READ8_MEMBER( z80_decoder_display_port_r );
	DECLARE_READ8_MEMBER( z80_controller_r );
	DECLARE_WRITE8_MEMBER( z80_controller_w );

	// internal read/write handlers
	DECLARE_WRITE_LINE_MEMBER( ctc_interrupt );
	DECLARE_WRITE8_MEMBER( ppi0_porta_w );
	DECLARE_READ8_MEMBER( ppi0_portb_r );
	DECLARE_READ8_MEMBER( ppi0_portc_r );
	DECLARE_WRITE8_MEMBER( ppi0_portc_w );
	DECLARE_READ8_MEMBER( ppi1_porta_r );
	DECLARE_WRITE8_MEMBER( ppi1_portb_w );
	DECLARE_WRITE8_MEMBER( ppi1_portc_w );

	void ldv1000_map(address_map &map);
	void ldv1000_portmap(address_map &map);

	// internal state
	required_device<z80_device> m_z80_cpu;                  /* CPU index of the Z80 */
	required_device<z80ctc_device> m_z80_ctc;                   /* CTC device */
	emu_timer *         m_multitimer;           /* multi-jump timer device */
	devcb_write_line    m_command_strobe_cb;

	/* communication status */
	uint8_t               m_command;              /* command byte to the player */
	uint8_t               m_status;                   /* status byte from the player */
	bool                m_vsync;                    /* VSYNC state */

	/* I/O port states */
	uint8_t               m_counter_start;            /* starting value for counter */
	uint8_t               m_counter;              /* current counter value */
	uint8_t               m_portc0;                   /* port C on PPI 0 */
	uint8_t               m_portb1;                   /* port B on PPI 1 */
	uint8_t               m_portc1;                   /* port C on PPI 1 */

	/* display/decode circuit emulation */
	uint8_t               m_portselect;               /* selection of which port to access */
	uint8_t               m_display[2][20];           /* display lines */
	uint8_t               m_dispindex;                /* index within the display line */
	uint8_t               m_vbi[7*3];             /* VBI data */
	bool                m_vbiready;             /* VBI ready flag */
	uint8_t               m_vbiindex;             /* index within the VBI data */

};

#endif // MAME_MACHINE_LDV1000_H