summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/includes/vcs80.h
blob: c44d8014f2be92b5a3ed38841030e018c0b1929d (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
// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic, Robbbert
#pragma once

#ifndef __VCS80__
#define __VCS80__


#include "cpu/z80/z80.h"
#include "cpu/z80/z80daisy.h"
#include "machine/z80pio.h"
#include "machine/ram.h"
#include "machine/bankdev.h"

#define SCREEN_TAG      "screen"
#define Z80_TAG         "z80"
#define Z80PIO_TAG      "z80pio"

class vcs80_state : public driver_device
{
public:
	vcs80_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
			m_maincpu(*this, Z80_TAG),
			m_pio(*this, Z80PIO_TAG),
			m_y0(*this, "Y0"),
			m_y1(*this, "Y1"),
			m_y2(*this, "Y2"),
			m_bdmem(*this, "bdmem")
	{ }

	required_device<cpu_device> m_maincpu;
	required_device<z80pio_device> m_pio;
	required_ioport m_y0;
	required_ioport m_y1;
	required_ioport m_y2;
	required_device<address_map_bank_device> m_bdmem;

	virtual void machine_start() override;

	DECLARE_READ8_MEMBER( pio_r );
	DECLARE_WRITE8_MEMBER( pio_w );
	DECLARE_READ8_MEMBER( pio_pa_r );
	DECLARE_WRITE8_MEMBER( pio_pb_w );

	DECLARE_READ8_MEMBER( mem_r )
	{
		m_pio->port_b_write((!BIT(offset, 0)) << 7);
		return m_bdmem->read8(space, offset);
	}

	DECLARE_WRITE8_MEMBER( mem_w )
	{
		m_pio->port_b_write((!BIT(offset, 0)) << 7);
		m_bdmem->write8(space, offset, data);
	}

	DECLARE_READ8_MEMBER( io_r )
	{
		m_pio->port_b_write((!BIT(offset, 0)) << 7);
		if ((offset >= 4) && (offset <= 7))
		{
			return pio_r(space, offset-4);
		}
		return 0xff;
	}

	DECLARE_WRITE8_MEMBER( io_w )
	{
		m_pio->port_b_write((!BIT(offset, 0)) << 7);
		if ((offset >= 4) && (offset <= 7))
		{
			pio_w(space, offset-4, data);
		}
	}

	/* keyboard state */
	int m_keylatch;
	int m_keyclk;
	DECLARE_DRIVER_INIT(vcs80);
	TIMER_DEVICE_CALLBACK_MEMBER(vcs80_keyboard_tick);
};

#endif