summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/machine/ra17xx.h
blob: 1523c8d0b15c948c68b74fee026e565957203b3d (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
// license:BSD-3-Clause
// copyright-holders:Juergen Buchmueller
/**********************************************************************

    Rockwell RA17xx (e.g. A1752, A1753) ROM, RAM and I/O chip

    Juergen Buchmueller <pullmoll@t-online.de>

    The device integrates a 2048 x 8 ROM, a 128 x 4 RAM and
    and 16 I/O ports at one of the port ranges 00 ... 0f,
    20 ... 2f, 40 ... 4f or 60 ... 6f.

**********************************************************************/
#ifndef MAME_MACHINE_RA17XX_H
#define MAME_MACHINE_RA17XX_H

#pragma once

#include "device.h"
#include "cpu/pps4/pps4.h"


class ra17xx_device : public device_t
{
public:
	ra17xx_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	DECLARE_READ8_MEMBER ( io_r );
	DECLARE_WRITE8_MEMBER( io_w );

	auto iord_cb() { return m_iord.bind(); }
	auto iowr_cb() { return m_iowr.bind(); }
	template <typename T> void set_cpu_tag(T &&tag) { m_cpu.set_tag(std::forward<T>(tag)); }

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

private:
	uint8_t           m_line[16];   //!< input/output flip-flops for 16 I/O lines
	uint8_t           m_bl;         //!< value of BL during the most recent output
	bool            m_enable;     //!< true if outputs are enabled
	devcb_read8     m_iord;       //!< input line (read, offset = line, data = 0/1)
	devcb_write8    m_iowr;       //!< output line (write, offset = line, data = 0/1)
	required_device<pps4_device> m_cpu;
};

DECLARE_DEVICE_TYPE(RA17XX, ra17xx_device)

#endif // MAME_MACHINE_RA17XX_H