summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/machine/dmv_keyb.h
blob: 8ae990f57629b0bf25bfd79a61e1c0d784722cc9 (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
// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
/**********************************************************************

    Decision Mate V keyboard emulation

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

#ifndef MAME_MACHINE_DMV_KEYB_H
#define MAME_MACHINE_DMV_KEYB_H

#pragma once


#include "cpu/mcs48/mcs48.h"


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

// ======================> dmv_keyboard_device

class dmv_keyboard_device : public device_t
{
public:
	// construction/destruction
	dmv_keyboard_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	DECLARE_WRITE_LINE_MEMBER(sd_poll_w);
	DECLARE_READ_LINE_MEMBER(sd_poll_r);

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

	// optional information overrides
	virtual const tiny_rom_entry *device_rom_region() const override;
	virtual void device_add_mconfig(machine_config &config) override;
	virtual ioport_constructor device_input_ports() const override;

private:
	required_device<i8741a_device> m_maincpu;
	required_ioport_array<16> m_keyboard;

	uint8_t   m_col;
	int     m_sd_data_state;
	int     m_sd_poll_state;

	uint8_t port1_r();
	uint8_t port2_r();
	void port2_w(uint8_t data);
};


// device type definition
DECLARE_DEVICE_TYPE(DMV_KEYBOARD, dmv_keyboard_device)


#endif // MAME_MACHINE_DMV_KEYB_H