summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/ss50/mps2.cpp
blob: f0d9350bfb823e8e519905aa9e3ef88ef7547cd0 (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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
// license:BSD-3-Clause
// copyright-holders:68bit
/**********************************************************************

    SWTPC MP-S2 Dual Serial Interface
    For 16 byte I/O address block.

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

#include "emu.h"
#include "mps2.h"

#include "bus/rs232/rs232.h"
#include "machine/6850acia.h"
#include "machine/input_merger.h"

//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> ss50_mps2_device

class ss50_mps2_device : public device_t, public ss50_card_interface
{
public:
	// construction/destruction
	ss50_mps2_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
		: device_t(mconfig, SS50_MPS2, tag, owner, clock)
		, ss50_card_interface(mconfig, *this)
		, m_acia_upper(*this, "acia_upper")
		, m_tx_rate_upper_jumper(*this, "TX_BAUD_UPPER")
		, m_rx_rate_upper_jumper(*this, "RX_BAUD_UPPER")
		, m_acia_lower(*this, "acia_lower")
		, m_tx_rate_lower_jumper(*this, "TX_BAUD_LOWER")
		, m_rx_rate_lower_jumper(*this, "RX_BAUD_LOWER")
	{
	}

protected:
	// device-specific overrides
	virtual ioport_constructor device_input_ports() const override;
	virtual void device_add_mconfig(machine_config &config) override;
	virtual void device_start() override { }

	// interface-specific overrides
	virtual u8 register_read(offs_t offset) override;
	virtual void register_write(offs_t offset, u8 data) override;
	virtual DECLARE_WRITE_LINE_MEMBER(f110_w) override;
	virtual DECLARE_WRITE_LINE_MEMBER(f150_9600_w) override;
	virtual DECLARE_WRITE_LINE_MEMBER(f300_w) override;
	virtual DECLARE_WRITE_LINE_MEMBER(f600_4800_w) override;
	virtual DECLARE_WRITE_LINE_MEMBER(f600_1200_w) override;

private:
	required_device<acia6850_device> m_acia_upper;
	required_ioport m_tx_rate_upper_jumper;
	required_ioport m_rx_rate_upper_jumper;
	required_device<acia6850_device> m_acia_lower;
	required_ioport m_tx_rate_lower_jumper;
	required_ioport m_rx_rate_lower_jumper;
};


static INPUT_PORTS_START( mps2 )
	PORT_START("TX_BAUD_UPPER")
	PORT_DIPNAME(0x1f, 0x1d, "Upper TX Baud Rate")
	PORT_DIPSETTING(0x1e, "110 / 440")
	PORT_DIPSETTING(0x1b, "300 / 1200")
	PORT_DIPSETTING(0x0f, "1200 / 4800")
	PORT_DIPSETTING(0x17, "4800 / 19200")
	PORT_DIPSETTING(0x1d, "9600 / 38400")

	PORT_START("RX_BAUD_UPPER")
	PORT_DIPNAME(0x1f, 0x1d, "Upper RX Baud Rate")
	PORT_DIPSETTING(0x1e, "110 / 440")
	PORT_DIPSETTING(0x1b, "300 / 1200")
	PORT_DIPSETTING(0x0f, "1200 / 4800")
	PORT_DIPSETTING(0x17, "4800 / 19200")
	PORT_DIPSETTING(0x1d, "9600 / 38400")

	PORT_START("TX_BAUD_LOWER")
	PORT_DIPNAME(0x1f, 0x1d, "Lower TX Baud Rate")
	PORT_DIPSETTING(0x1e, "110 / 440")
	PORT_DIPSETTING(0x1b, "300 / 1200")
	PORT_DIPSETTING(0x0f, "1200 / 4800")
	PORT_DIPSETTING(0x17, "4800 / 19200")
	PORT_DIPSETTING(0x1d, "9600 / 38400")

	PORT_START("RX_BAUD_LOWER")
	PORT_DIPNAME(0x1f, 0x1d, "Lower RX Baud Rate")
	PORT_DIPSETTING(0x1e, "110 / 440")
	PORT_DIPSETTING(0x1b, "300 / 1200")
	PORT_DIPSETTING(0x0f, "1200 / 4800")
	PORT_DIPSETTING(0x17, "4800 / 19200")
	PORT_DIPSETTING(0x1d, "9600 / 38400")

INPUT_PORTS_END


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

ioport_constructor ss50_mps2_device::device_input_ports() const
{
	return INPUT_PORTS_NAME(mps2);
}


static DEVICE_INPUT_DEFAULTS_START( terminal_upper )
	DEVICE_INPUT_DEFAULTS("RS232_RXBAUD", 0xff, RS232_BAUD_9600)
	DEVICE_INPUT_DEFAULTS("RS232_TXBAUD", 0xff, RS232_BAUD_9600)
	DEVICE_INPUT_DEFAULTS("RS232_DATABITS", 0xff, RS232_DATABITS_8)
	DEVICE_INPUT_DEFAULTS("RS232_PARITY", 0xff, RS232_PARITY_NONE)
	DEVICE_INPUT_DEFAULTS("RS232_STOPBITS", 0xff, RS232_STOPBITS_1)
DEVICE_INPUT_DEFAULTS_END

static DEVICE_INPUT_DEFAULTS_START( terminal_lower )
	DEVICE_INPUT_DEFAULTS("RS232_RXBAUD", 0xff, RS232_BAUD_9600)
	DEVICE_INPUT_DEFAULTS("RS232_TXBAUD", 0xff, RS232_BAUD_9600)
	DEVICE_INPUT_DEFAULTS("RS232_DATABITS", 0xff, RS232_DATABITS_8)
	DEVICE_INPUT_DEFAULTS("RS232_PARITY", 0xff, RS232_PARITY_NONE)
	DEVICE_INPUT_DEFAULTS("RS232_STOPBITS", 0xff, RS232_STOPBITS_1)
DEVICE_INPUT_DEFAULTS_END

//-------------------------------------------------
//  device_add_mconfig - add device-specific
//  machine configuration
//-------------------------------------------------

void ss50_mps2_device::device_add_mconfig(machine_config &config)
{
	ACIA6850(config, m_acia_upper, 0);
	m_acia_upper->txd_handler().set("rs232_upper", FUNC(rs232_port_device::write_txd));
	m_acia_upper->rts_handler().set("rs232_upper", FUNC(rs232_port_device::write_rts));
	m_acia_upper->irq_handler().set("irq", FUNC(input_merger_device::in_w<0>));

	rs232_port_device &rs232_upper(RS232_PORT(config, "rs232_upper", default_rs232_devices, "terminal"));
	rs232_upper.rxd_handler().set(m_acia_upper, FUNC(acia6850_device::write_rxd));
	rs232_upper.cts_handler().set(m_acia_upper, FUNC(acia6850_device::write_cts));
	rs232_upper.dcd_handler().set(m_acia_upper, FUNC(acia6850_device::write_dcd));
	rs232_upper.set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal_upper));

	ACIA6850(config, m_acia_lower, 0);
	m_acia_lower->txd_handler().set("rs232_lower", FUNC(rs232_port_device::write_txd));
	m_acia_lower->rts_handler().set("rs232_lower", FUNC(rs232_port_device::write_rts));
	m_acia_lower->irq_handler().set("irq", FUNC(input_merger_device::in_w<1>));

	rs232_port_device &rs232_lower(RS232_PORT(config, "rs232_lower", default_rs232_devices, "terminal"));
	rs232_lower.rxd_handler().set(m_acia_lower, FUNC(acia6850_device::write_rxd));
	rs232_lower.cts_handler().set(m_acia_lower, FUNC(acia6850_device::write_cts));
	rs232_lower.dcd_handler().set(m_acia_lower, FUNC(acia6850_device::write_dcd));
	rs232_lower.set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal_lower));

	INPUT_MERGER_ANY_HIGH(config, "irq").output_handler().set(FUNC(ss50_mps2_device::write_irq));
}


//-------------------------------------------------
//  register_read - read from a port register
//-------------------------------------------------

u8 ss50_mps2_device::register_read(offs_t offset)
{
	if (offset < 2)
		return m_acia_upper->read(offset & 1);

	if (offset < 4)
		return 0;

	if (offset < 6)
		return m_acia_lower->read((offset - 4) & 1);

	if (offset < 0xe)
		return 0;

	// TODO there is also a 4 bit control line input port at
	// offset 0x0f, repeated at 0x0e.
	return 0;
}

//-------------------------------------------------
//  register_write - write to a port register
//-------------------------------------------------

void ss50_mps2_device::register_write(offs_t offset, u8 data)
{
	if (offset < 2)
		m_acia_upper->write(offset & 1, data);

	if (offset < 4)
		return;

	if (offset < 6)
		m_acia_lower->write((offset - 4) & 1, data);
}

WRITE_LINE_MEMBER(ss50_mps2_device::f110_w)
{
	if (!BIT(m_tx_rate_upper_jumper->read(), 0))
		m_acia_upper->write_txc(state);
	if (!BIT(m_rx_rate_upper_jumper->read(), 0))
		m_acia_upper->write_rxc(state);
	if (!BIT(m_tx_rate_lower_jumper->read(), 0))
		m_acia_lower->write_txc(state);
	if (!BIT(m_rx_rate_lower_jumper->read(), 0))
		m_acia_lower->write_rxc(state);
}

WRITE_LINE_MEMBER(ss50_mps2_device::f150_9600_w)
{
	if (!BIT(m_tx_rate_upper_jumper->read(), 1))
		m_acia_upper->write_txc(state);
	if (!BIT(m_rx_rate_upper_jumper->read(), 1))
		m_acia_upper->write_rxc(state);
	if (!BIT(m_tx_rate_lower_jumper->read(), 1))
		m_acia_lower->write_txc(state);
	if (!BIT(m_rx_rate_lower_jumper->read(), 1))
		m_acia_lower->write_rxc(state);
}

WRITE_LINE_MEMBER(ss50_mps2_device::f300_w)
{
	if (!BIT(m_tx_rate_upper_jumper->read(), 2))
		m_acia_upper->write_txc(state);
	if (!BIT(m_rx_rate_upper_jumper->read(), 2))
		m_acia_upper->write_rxc(state);
	if (!BIT(m_tx_rate_lower_jumper->read(), 2))
		m_acia_lower->write_txc(state);
	if (!BIT(m_rx_rate_lower_jumper->read(), 2))
		m_acia_lower->write_rxc(state);
}

WRITE_LINE_MEMBER(ss50_mps2_device::f600_4800_w)
{
	if (!BIT(m_tx_rate_upper_jumper->read(), 3))
		m_acia_upper->write_txc(state);
	if (!BIT(m_rx_rate_upper_jumper->read(), 3))
		m_acia_upper->write_rxc(state);
	if (!BIT(m_tx_rate_lower_jumper->read(), 3))
		m_acia_lower->write_txc(state);
	if (!BIT(m_rx_rate_lower_jumper->read(), 3))
		m_acia_lower->write_rxc(state);
}

WRITE_LINE_MEMBER(ss50_mps2_device::f600_1200_w)
{
	if (!BIT(m_tx_rate_upper_jumper->read(), 4))
		m_acia_upper->write_txc(state);
	if (!BIT(m_rx_rate_upper_jumper->read(), 4))
		m_acia_upper->write_rxc(state);
	if (!BIT(m_tx_rate_lower_jumper->read(), 4))
		m_acia_lower->write_txc(state);
	if (!BIT(m_rx_rate_lower_jumper->read(), 4))
		m_acia_lower->write_rxc(state);
}


// device type definition
DEFINE_DEVICE_TYPE_PRIVATE(SS50_MPS2, ss50_card_interface, ss50_mps2_device, "ss50_mps2", "MP-S2 Dual Serial Interface")