summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/video/vtvideo.h
blob: 0d135a3973be0e7cfd35aef3e1da019d363cf2a9 (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
// license:GPL-2.0+
// copyright-holders:Miodrag Milanovic,Karl-Ludwig Deisenhofer
/**********************************************************************

DEC VT Terminal video emulation
[ DC012 and DC011 emulation ]

01/05/2009 Initial implementation [Miodrag Milanovic]

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

#ifndef MAME_VIDEO_VTVIDEO_H
#define MAME_VIDEO_VTVIDEO_H

#pragma once

#include "emupal.h"


class vt100_video_device : public device_t,
	public device_video_interface
{
public:
	vt100_video_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	auto ram_rd_callback() { return m_read_ram.bind(); }
	auto vert_freq_intr_wr_callback() { return m_write_vert_freq_intr.bind(); }
	auto lba3_lba4_wr_callback() { return m_write_lba3_lba4.bind(); }
	auto lba7_wr_callback() { return m_write_lba7.bind(); }

	template <typename T> void set_chargen(T &&tag) { m_char_rom.set_tag(std::forward<T>(tag)); }

	DECLARE_READ_LINE_MEMBER(lba7_r);
	DECLARE_WRITE8_MEMBER(dc012_w);
	DECLARE_WRITE8_MEMBER(dc011_w);
	DECLARE_WRITE8_MEMBER(brightness_w);

	virtual void video_update(bitmap_ind16 &bitmap, const rectangle &cliprect);

protected:
	vt100_video_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 void device_add_mconfig(machine_config &config) override;

	// internal state
	void recompute_parameters();
	void vblank_callback(screen_device &screen, bool state);
	virtual void display_char(bitmap_ind16 &bitmap, uint8_t code, int x, int y, uint8_t scroll_region, uint8_t display_type);
	TIMER_CALLBACK_MEMBER(lba3_change);
	TIMER_CALLBACK_MEMBER(lba7_change);
	virtual void notify_vblank(bool choice) { }

	devcb_read8        m_read_ram;
	devcb_write_line   m_write_vert_freq_intr;
	devcb_write8       m_write_lba3_lba4;
	devcb_write_line   m_write_lba7;

	int m_lba7;

	bool MHFU_FLAG;
	int MHFU_counter;

	// dc012 attributes
	uint8_t m_scroll_latch;
	bool m_scroll_latch_valid;
	uint8_t m_blink_flip_flop;
	uint8_t m_reverse_field;
	uint8_t m_basic_attribute;
	// dc011 attributes
	uint8_t m_columns;
	uint8_t m_height;
	uint8_t m_height_MAX;
	uint8_t m_fill_lines;
	bool m_is_50hz;
	bool m_interlaced;
	emu_timer *m_lba3_change_timer;
	emu_timer *m_lba7_change_timer;

	required_region_ptr<uint8_t> m_char_rom; /* character rom region */
	required_device<palette_device> m_palette;

	bool m_notify_vblank;
	int m_last_scroll;

	bool m_linedoubler;
};


class rainbow_video_device : public vt100_video_device
{
public:
	rainbow_video_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual void video_update(bitmap_ind16 &bitmap, const rectangle &cliprect) override;
	virtual void video_blanking(bitmap_ind16 &bitmap, const rectangle &cliprect);

	int MHFU(int);
	void palette_select(int choice);

protected:
	virtual void display_char(bitmap_ind16 &bitmap, uint8_t code, int x, int y, uint8_t scroll_region, uint8_t display_type) override;
	virtual void notify_vblank(bool choice) override;
	virtual void device_reset() override;
	virtual void device_add_mconfig(machine_config &config) override;
};

DECLARE_DEVICE_TYPE(VT100_VIDEO, vt100_video_device)
DECLARE_DEVICE_TYPE(RAINBOW_VIDEO, rainbow_video_device)


#endif // MAME_VIDEO_VTVIDEO_H