summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/machine/gen_latch.h
blob: ee1dc5d14ccfee978bb0e578815ecf2481ad3f48 (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
// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************

    Generic 8bit and 16 bit latch devices

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

#pragma once

#ifndef __GEN_LATCH_H__
#define __GEN_LATCH_H__

//**************************************************************************
//  INTERFACE CONFIGURATION MACROS
//**************************************************************************

#define MCFG_GENERIC_LATCH_8_ADD(_tag) \
	MCFG_DEVICE_ADD(_tag, GENERIC_LATCH_8, 0)

#define MCFG_GENERIC_LATCH_16_ADD(_tag) \
	MCFG_DEVICE_ADD(_tag, GENERIC_LATCH_16, 0)

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

// ======================> generic_latch_8_device

class generic_latch_8_device : public device_t
{
public:
	// construction/destruction
	generic_latch_8_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);

	DECLARE_READ8_MEMBER( read );
	DECLARE_WRITE8_MEMBER( write );

	DECLARE_WRITE8_MEMBER( preset_w );
	DECLARE_WRITE8_MEMBER( clear_w );
	DECLARE_WRITE_LINE_MEMBER( preset_w );
	DECLARE_WRITE_LINE_MEMBER( clear_w );

protected:
	virtual void device_start() override;

	void sync_callback(void *ptr, INT32 param);
private:
	UINT16                  m_latched_value;
	UINT8                   m_latch_read;
};

// device type definition
extern const device_type GENERIC_LATCH_8;


// ======================> generic_latch_16_device

class generic_latch_16_device : public device_t
{
public:
	// construction/destruction
	generic_latch_16_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);

	DECLARE_READ16_MEMBER( read );
	DECLARE_WRITE16_MEMBER( write );

	DECLARE_WRITE16_MEMBER( preset_w );
	DECLARE_WRITE16_MEMBER( clear_w );
	DECLARE_WRITE_LINE_MEMBER( preset_w );
	DECLARE_WRITE_LINE_MEMBER( clear_w );

protected:
	virtual void device_start() override;

	void sync_callback(void *ptr, INT32 param);
private:
	UINT16                  m_latched_value;
	UINT8                   m_latch_read;
};

// device type definition
extern const device_type GENERIC_LATCH_16;


#endif  /* __GEN_LATCH_H__ */