summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/machine/vic20user.c
blob: 7aef40eb82674758066c6198e796cedef0b7caae (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
/**********************************************************************

    Commodore VIC-20 User Port emulation

    Copyright MESS Team.
    Visit http://mamedev.org for licensing and usage restrictions.

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

#include "machine/vic20user.h"



//**************************************************************************
//  GLOBAL VARIABLES
//**************************************************************************

const device_type VIC20_USER_PORT = &device_creator<vic20_user_port_device>;



//**************************************************************************
//  CARD INTERFACE
//**************************************************************************

//-------------------------------------------------
//  device_vic20_user_port_interface - constructor
//-------------------------------------------------

device_vic20_user_port_interface::device_vic20_user_port_interface(const machine_config &mconfig, device_t &device)
	: device_slot_card_interface(mconfig,device)
{
	m_slot = dynamic_cast<vic20_user_port_device *>(device.owner());
}


//-------------------------------------------------
//  ~device_vic20_user_port_interface - destructor
//-------------------------------------------------

device_vic20_user_port_interface::~device_vic20_user_port_interface()
{
}



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

//-------------------------------------------------
//  vic20_user_port_device - constructor
//-------------------------------------------------

vic20_user_port_device::vic20_user_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
		device_t(mconfig, VIC20_USER_PORT, "VIC-20 user port", tag, owner, clock),
		device_slot_interface(mconfig, *this)
{
}


//-------------------------------------------------
//  device_config_complete - perform any
//  operations now that the configuration is
//  complete
//-------------------------------------------------

void vic20_user_port_device::device_config_complete()
{
	// inherit a copy of the static data
	const vic20_user_port_interface *intf = reinterpret_cast<const vic20_user_port_interface *>(static_config());
	if (intf != NULL)
	{
		*static_cast<vic20_user_port_interface *>(this) = *intf;
	}

	// or initialize to defaults if none provided
	else
	{
		memset(&m_out_cb1_cb, 0, sizeof(m_out_cb1_cb));
		memset(&m_out_cb2_cb, 0, sizeof(m_out_cb2_cb));
		memset(&m_out_reset_cb, 0, sizeof(m_out_reset_cb));
	}
}


//-------------------------------------------------
//  device_start - device-specific startup
//-------------------------------------------------

void vic20_user_port_device::device_start()
{
	m_card = dynamic_cast<device_vic20_user_port_interface *>(get_card_device());

	// resolve callbacks
	m_out_light_pen_func.resolve(m_out_light_pen_cb, *this);
	m_out_cb1_func.resolve(m_out_cb1_cb, *this);
	m_out_cb2_func.resolve(m_out_cb2_cb, *this);
	m_out_reset_func.resolve(m_out_reset_cb, *this);
}


//-------------------------------------------------
//  device_reset - device-specific reset
//-------------------------------------------------

void vic20_user_port_device::device_reset()
{
	if (get_card_device())
	{
		get_card_device()->reset();
	}
}


READ8_MEMBER( vic20_user_port_device::pb_r ) { UINT8 data = 0xff; if (m_card != NULL) data = m_card->vic20_pb_r(space, offset); return data; }
WRITE8_MEMBER( vic20_user_port_device::pb_w ) { if (m_card != NULL) m_card->vic20_pb_w(space, offset, data); }
READ_LINE_MEMBER( vic20_user_port_device::joy0_r ) { int state = 1; if (m_card != NULL) state = m_card->vic20_joy0_r(); return state; }
READ_LINE_MEMBER( vic20_user_port_device::joy1_r ) { int state = 1; if (m_card != NULL) state = m_card->vic20_joy1_r(); return state; }
READ_LINE_MEMBER( vic20_user_port_device::joy2_r ) { int state = 1; if (m_card != NULL) state = m_card->vic20_joy2_r(); return state; }
READ_LINE_MEMBER( vic20_user_port_device::light_pen_r ) { int state = 1; if (m_card != NULL) state = m_card->vic20_light_pen_r(); return state; }
READ_LINE_MEMBER( vic20_user_port_device::cassette_switch_r ) { int state = 1; if (m_card != NULL) state = m_card->vic20_cassette_switch_r(); return state; }
WRITE_LINE_MEMBER( vic20_user_port_device::cb1_w ) { if (m_card != NULL) m_card->vic20_cb1_w(state); }
WRITE_LINE_MEMBER( vic20_user_port_device::cb2_w ) { if (m_card != NULL) m_card->vic20_cb2_w(state); }
WRITE_LINE_MEMBER( vic20_user_port_device::atn_w ) { if (m_card != NULL) m_card->vic20_atn_w(state); }