summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/nes_ctrl/arkpaddle.cpp
blob: 8cd2cfea3c4568e519350118a424de3375607395 (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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/**********************************************************************

    Nintendo Family Computer & Entertainment System -
    Arkanoid Paddle input device

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

#include "emu.h"
#include "arkpaddle.h"

//**************************************************************************
//  DEVICE DEFINITIONS
//**************************************************************************

DEFINE_DEVICE_TYPE(NES_ARKPADDLE,    nes_vaus_device,   "nes_vaus",   "NES Arkanoid Vaus Controller")
DEFINE_DEVICE_TYPE(NES_ARKPADDLE_FC, nes_vausfc_device, "nes_vausfc", "FC Arkanoid Vaus Controller")


static INPUT_PORTS_START( arkanoid_paddle )
	PORT_START("PADDLE")
	PORT_BIT( 0xff, 0x7f, IPT_PADDLE) PORT_SENSITIVITY(25) PORT_KEYDELTA(25) PORT_CENTERDELTA(0) PORT_MINMAX(0x62,0xf2)
	PORT_START("BUTTON")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_NAME("Paddle button")
INPUT_PORTS_END


//-------------------------------------------------
//  input_ports - device-specific input ports
//-------------------------------------------------

ioport_constructor nes_vaus_device::device_input_ports() const
{
	return INPUT_PORTS_NAME( arkanoid_paddle );
}



//**************************************************************************
//  LIVE DEVICE
//**************************************************************************

//-------------------------------------------------
//  nes_vaus_device - constructor
//-------------------------------------------------

nes_vaus_device::nes_vaus_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
	: device_t(mconfig, type, tag, owner, clock)
	, device_nes_control_port_interface(mconfig, *this)
	, m_paddle(*this, "PADDLE")
	, m_button(*this, "BUTTON")
	, m_start_conv(0), m_latch(0)
{
}

nes_vaus_device::nes_vaus_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
	: nes_vaus_device(mconfig, NES_ARKPADDLE, tag, owner, clock)
{
}

nes_vausfc_device::nes_vausfc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
	: nes_vaus_device(mconfig, NES_ARKPADDLE_FC, tag, owner, clock)
{
}


//-------------------------------------------------
//  device_start
//-------------------------------------------------

void nes_vaus_device::device_start()
{
	save_item(NAME(m_latch));
	save_item(NAME(m_start_conv));
}


//-------------------------------------------------
//  device_reset
//-------------------------------------------------

void nes_vaus_device::device_reset()
{
	m_latch = 0;
	m_start_conv = 0;
}


//-------------------------------------------------
//  read
//-------------------------------------------------

uint8_t nes_vaus_device::read_bit34()
{
	uint8_t ret = (m_button->read() << 3);
	ret |= (m_latch & 0x80) >> 3;
	m_latch <<= 1;
	m_latch &= 0xff;
	return ret;
}

uint8_t nes_vausfc_device::read_exp(offs_t offset)
{
	uint8_t ret;
	if (offset == 0)    //$4016
		ret = m_button->read() << 1;
	else    //$4017
	{
		ret = (m_latch & 0x80) >> 6;
		m_latch <<= 1;
		m_latch &= 0xff;
	}
	return ret;
}

//-------------------------------------------------
//  write
//-------------------------------------------------

void nes_vaus_device::write(uint8_t data)
{
	int old = m_start_conv;

	if (data == 0 && old == 1)
		m_latch = (uint8_t) (m_paddle->read() ^ 0xff);

	m_start_conv = data;
}