summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/machine/bfm_bda.h
blob: 3570c478f81875840250f524b936320bc37a37ac (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
// license:BSD-3-Clause
// copyright-holders:David Haywood
#pragma once
#ifndef BFM_BDA_H
#define BFM_BDA_H

#define MCFG_BFMBDA_ADD(_tag,_val) \
		MCFG_DEVICE_ADD(_tag, BFM_BDA,60)\
		MCFG_BDA_PORT(_val)
#define MCFG_BDA_PORT(_val) \
	bfm_bda_t::static_set_value(*device, _val);
#define MCFG_BFMBDA_REMOVE(_tag) \
	MCFG_DEVICE_REMOVE(_tag)

class bfm_bda_t : public device_t
{
public:
	bfm_bda_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);

	// inline configuration helpers
	static void static_set_value(device_t &device, int val);

	int write_char(int data);
	virtual void update_display();
	UINT8   m_port_val;
	void blank(int data);

	void shift_data(int data);
	void setdata(int segdata, int data);
	UINT16 set_display(UINT16 segin);

protected:
	static const UINT8 AT_NORMAL  = 0x00;
	static const UINT8 AT_FLASH   = 0x01;
	static const UINT8 AT_BLANK   = 0x02;
	static const UINT8 AT_FLASHED = 0x80;   // set when character should be blinked off

	int m_cursor_pos;
	int m_window_start;     // display window start pos 0-15
	int m_window_end;       // display window end   pos 0-15
	int m_window_size;      // window  size
	int m_shift_count;
	int m_shift_data;
	int m_pcursor_pos;
	int m_blank_flag;
	int m_flash_flag;
	int m_scroll_active;
	int m_display_mode;
	int m_flash_rate;
	int m_flash_control;
	UINT8 m_cursor;
	UINT16 m_chars[16];
	UINT16 m_outputs[16];
	UINT8 m_attrs[16];
	UINT16 m_user_data;             // user defined character data (16 bit)
	UINT16 m_user_def;          // user defined character state

	virtual void device_start() override;
	virtual void device_reset() override;
	virtual void device_post_load() override;

};

extern const device_type BFM_BDA;
#endif