summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/machine/mb14241.h
blob: 01c2d1b0ddec375622d391f9a45eb0785ffc0a47 (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
// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/*****************************************************************************

    MB14241 shifter IC emulation

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

#ifndef __MB14241_H__
#define __MB14241_H__


class mb14241_device : public device_t
{
public:
	mb14241_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);

	DECLARE_WRITE8_MEMBER ( shift_count_w );
	DECLARE_WRITE8_MEMBER ( shift_data_w );
	DECLARE_READ8_MEMBER( shift_result_r );

protected:
	// device-level overrides
	virtual void device_config_complete() override;
	virtual void device_start() override;
	virtual void device_reset() override;

private:
	// internal state

	UINT16 m_shift_data;  /* 15 bits only */
	UINT8 m_shift_count;  /* 3 bits */
};

extern const device_type MB14241;


/***************************************************************************
    DEVICE CONFIGURATION MACROS
***************************************************************************/

#define MCFG_MB14241_ADD(_tag) \
	MCFG_DEVICE_ADD(_tag, MB14241, 0)

#endif /* __MB14241_H__ */