summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/machine/vip_byteio.c
blob: 49c603653b319aaa12a12b075f6a10f581739b9c (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
130
131
132
/**********************************************************************

    RCA Cosmac VIP Byte Input/Output port emulation

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

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

#include "machine/vip_byteio.h"



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

const device_type VIP_BYTEIO_PORT = &device_creator<vip_byteio_port_device>;



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

//-------------------------------------------------
//  device_vip_byteio_port_interface - constructor
//-------------------------------------------------

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


//-------------------------------------------------
//  ~device_vip_byteio_port_interface - destructor
//-------------------------------------------------

device_vip_byteio_port_interface::~device_vip_byteio_port_interface()
{
}



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

//-------------------------------------------------
//  vip_byteio_port_device - constructor
//-------------------------------------------------

vip_byteio_port_device::vip_byteio_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
		device_t(mconfig, VIP_BYTEIO_PORT, "VIP byte I/O port", tag, owner, clock),
		device_slot_interface(mconfig, *this)
{
}


//-------------------------------------------------
//  vip_byteio_port_device - destructor
//-------------------------------------------------

vip_byteio_port_device::~vip_byteio_port_device()
{
}


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

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

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


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

void vip_byteio_port_device::device_start()
{
	m_cart = dynamic_cast<device_vip_byteio_port_interface *>(get_card_device());

	// resolve callbacks
	m_out_inst_func.resolve(m_out_inst_cb, *this);
}


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

void vip_byteio_port_device::device_reset()
{
}


UINT8 vip_byteio_port_device::in_r() { UINT8 data = 0xff; if (m_cart != NULL) data = m_cart->vip_in_r(); return data; }
void vip_byteio_port_device::out_w(UINT8 data) { if (m_cart != NULL) m_cart->vip_out_w(data); }
READ_LINE_MEMBER( vip_byteio_port_device::ef3_r ) { int state = CLEAR_LINE; if (m_cart != NULL) state = m_cart->vip_ef3_r(); return state; }
READ_LINE_MEMBER( vip_byteio_port_device::ef4_r ) { int state = CLEAR_LINE; if (m_cart != NULL) state = m_cart->vip_ef4_r(); return state; }
WRITE_LINE_MEMBER( vip_byteio_port_device::q_w ) { if (m_cart != NULL) m_cart->vip_q_w(state); }

WRITE_LINE_MEMBER( vip_byteio_port_device::inst_w ) { m_out_inst_func(state); }


//-------------------------------------------------
//  SLOT_INTERFACE( vip_byteio_cards )
//-------------------------------------------------

SLOT_INTERFACE_START( vip_byteio_cards )
	//SLOT_INTERFACE("exp2", VP576_BYTEIO)
	SLOT_INTERFACE("ascii", VP620)
SLOT_INTERFACE_END