summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/fidel_sc8.cpp
blob: 5f1949eff746b8ec805e9594ecba59a223837ef5 (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
// license:BSD-3-Clause
// copyright-holders:hap
// thanks-to:yoyo_chessboard
/******************************************************************************

Fidelity Sensory Chess Challenger 8

Hardware notes:
- Z80A CPU @ 3.9MHz
- 4KB ROM(MOS 2732), 256 bytes RAM(35391CP)
- chessboard buttons, 8*8+1 leds
- PCB label 510-1011 REV.2

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

#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/sensorboard.h"
#include "sound/dac.h"
#include "sound/volt_reg.h"
#include "video/pwm.h"
#include "speaker.h"

// internal artwork
#include "fidel_sc8.lh" // clickable


namespace {

class scc_state : public driver_device
{
public:
	scc_state(const machine_config &mconfig, device_type type, const char *tag) :
		driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_board(*this, "board"),
		m_display(*this, "display"),
		m_dac(*this, "dac"),
		m_inputs(*this, "IN.0")
	{ }

	// machine configs
	void scc(machine_config &config);

protected:
	virtual void machine_start() override;

private:
	// devices/pointers
	required_device<cpu_device> m_maincpu;
	required_device<sensorboard_device> m_board;
	required_device<pwm_display_device> m_display;
	required_device<dac_bit_interface> m_dac;
	required_ioport m_inputs;

	// address maps
	void main_map(address_map &map);
	void main_io(address_map &map);

	// I/O handlers
	DECLARE_READ8_MEMBER(input_r);
	DECLARE_WRITE8_MEMBER(control_w);

	u8 m_inp_mux;
	u8 m_led_data;
};

void scc_state::machine_start()
{
	// zerofill
	m_inp_mux = 0;
	m_led_data = 0;

	// register for savestates
	save_item(NAME(m_inp_mux));
	save_item(NAME(m_led_data));
}



/******************************************************************************
    I/O
******************************************************************************/

// TTL

WRITE8_MEMBER(scc_state::control_w)
{
	// a0-a2,d7: led data
	u8 mask = 1 << (offset & 7);
	m_led_data = (m_led_data & ~mask) | ((data & 0x80) ? mask : 0);

	// d0-d3: led select, input mux (row 9 is speaker out)
	// d4: corner led(direct)
	m_inp_mux = data & 0xf;
	u16 sel = 1 << m_inp_mux;
	m_dac->write(BIT(sel, 9));
	m_display->matrix((sel & 0xff) | (data << 4 & 0x100), m_led_data);
}

READ8_MEMBER(scc_state::input_r)
{
	u8 data = 0;

	// d0-d7: multiplexed inputs (active low)
	// read chessboard sensors
	if (m_inp_mux < 8)
		data = m_board->read_file(m_inp_mux);

	// read button panel
	else if (m_inp_mux == 8)
		data = m_inputs->read();

	return ~data;
}



/******************************************************************************
    Address Maps
******************************************************************************/

void scc_state::main_map(address_map &map)
{
	map(0x0000, 0x0fff).rom();
	map(0x5000, 0x50ff).ram();
}

void scc_state::main_io(address_map &map)
{
	map.global_mask(0x07);
	map(0x00, 0x07).rw(FUNC(scc_state::input_r), FUNC(scc_state::control_w));
}



/******************************************************************************
    Input Ports
******************************************************************************/

static INPUT_PORTS_START( scc )
	PORT_START("IN.0")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_NAME("Pawn")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_NAME("Rook")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_NAME("Knight")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_NAME("Bishop")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_NAME("Queen")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_NAME("King")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_DEL) PORT_NAME("CL")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_CODE(KEYCODE_R) PORT_NAME("RE")
INPUT_PORTS_END



/******************************************************************************
    Machine Configs
******************************************************************************/

void scc_state::scc(machine_config &config)
{
	/* basic machine hardware */
	Z80(config, m_maincpu, 3.9_MHz_XTAL);
	m_maincpu->set_addrmap(AS_PROGRAM, &scc_state::main_map);
	m_maincpu->set_addrmap(AS_IO, &scc_state::main_io);

	SENSORBOARD(config, m_board).set_type(sensorboard_device::BUTTONS);
	m_board->init_cb().set(m_board, FUNC(sensorboard_device::preset_chess));
	m_board->set_delay(attotime::from_msec(100));

	/* video hardware */
	PWM_DISPLAY(config, m_display).set_size(9, 8);
	config.set_default_layout(layout_fidel_sc8);

	/* sound hardware */
	SPEAKER(config, "speaker").front_center();
	DAC_1BIT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25);
	VOLTAGE_REGULATOR(config, "vref").add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT);
}



/******************************************************************************
    ROM Definitions
******************************************************************************/

ROM_START( fscc8 ) // model SCC
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "101-32017", 0x0000, 0x1000, CRC(5340820d) SHA1(e3494c7624b3cacbbb9a0a8cc9e1ed3e00326dfd) ) // 2732
ROM_END

} // anonymous namespace



/******************************************************************************
    Drivers
******************************************************************************/

//    YEAR  NAME   PARENT CMP MACHINE  INPUT  STATE      INIT        COMPANY, FULLNAME, FLAGS
CONS( 1980, fscc8, 0,      0, scc,     scc,   scc_state, empty_init, "Fidelity Electronics", "Sensory Chess Challenger 8", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )