summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/ti8x/teeconn.cpp
blob: 9325816735bda8d9a8a29997772d5626a2f81b19 (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
// license:BSD-3-Clause
// copyright-holders:Vas Crabb

#include "emu.h"
#include "teeconn.h"


DEFINE_DEVICE_TYPE(TI8X_TEE_CONNECTOR, bus::ti8x::tee_connector_device, "ti8x_tconn", "TI-8x T-connector")


namespace bus::ti8x {

tee_connector_device::tee_connector_device(
		machine_config const &mconfig,
		char const *tag,
		device_t *owner,
		uint32_t clock)
	: device_t(mconfig, TI8X_TEE_CONNECTOR, tag, owner, clock)
	, device_ti8x_link_port_interface(mconfig, *this)
	, m_port_a(*this, "a")
	, m_port_b(*this, "b")
	, m_tip_host(true)
	, m_tip_a(true)
	, m_tip_b(true)
	, m_ring_host(true)
	, m_ring_a(true)
	, m_ring_b(true)
{
}


WRITE_LINE_MEMBER(tee_connector_device::tip_a_w)
{
	m_tip_a = bool(state);
	output_tip((m_tip_a && m_tip_b) ? 1 : 0);
	m_port_b->tip_w((m_tip_host && m_tip_a) ? 1 : 0);
}


WRITE_LINE_MEMBER(tee_connector_device::ring_a_w)
{
	m_ring_a = bool(state);
	output_ring((m_ring_a && m_ring_b) ? 1 : 0);
	m_port_b->ring_w((m_ring_host && m_ring_a) ? 1 : 0);
}


WRITE_LINE_MEMBER(tee_connector_device::tip_b_w)
{
	m_tip_b = bool(state);
	output_tip((m_tip_a && m_tip_b) ? 1 : 0);
	m_port_a->tip_w((m_tip_host && m_tip_b) ? 1 : 0);
}


WRITE_LINE_MEMBER(tee_connector_device::ring_b_w)
{
	m_ring_b = bool(state);
	output_ring((m_ring_a && m_ring_b) ? 1 : 0);
	m_port_a->ring_w((m_ring_host && m_ring_b) ? 1 : 0);
}


void tee_connector_device::device_add_mconfig(machine_config &config)
{
	TI8X_LINK_PORT(config, m_port_a, default_ti8x_link_devices, nullptr);
	m_port_a->tip_handler().set(FUNC(tee_connector_device::tip_a_w));
	m_port_a->ring_handler().set(FUNC(tee_connector_device::ring_a_w));

	TI8X_LINK_PORT(config, m_port_b, default_ti8x_link_devices, nullptr);
	m_port_b->tip_handler().set(FUNC(tee_connector_device::tip_b_w));
	m_port_b->ring_handler().set(FUNC(tee_connector_device::ring_b_w));
}


void tee_connector_device::device_start()
{
	save_item(NAME(m_tip_host));
	save_item(NAME(m_tip_a));
	save_item(NAME(m_tip_b));
	save_item(NAME(m_ring_host));
	save_item(NAME(m_ring_a));
	save_item(NAME(m_ring_b));

	m_tip_host = m_tip_a = m_tip_b = true;
	m_ring_host = m_ring_a = m_ring_b = true;
}


WRITE_LINE_MEMBER(tee_connector_device::input_tip)
{
	m_tip_host = bool(state);
	m_port_a->tip_w((m_tip_host && m_tip_b) ? 1 : 0);
	m_port_b->tip_w((m_tip_host && m_tip_a) ? 1 : 0);
}


WRITE_LINE_MEMBER(tee_connector_device::input_ring)
{
	m_ring_host = bool(state);
	m_port_a->ring_w((m_ring_host && m_ring_b) ? 1 : 0);
	m_port_b->ring_w((m_ring_host && m_ring_a) ? 1 : 0);
}

} // namespace bus::ti8x