summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/drivers/comp4.c
blob: 240f259cef116b8af4744a76600d410a8cab8666 (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
// license:BSD-3-Clause
// copyright-holders:hap
/***************************************************************************

  Milton Bradley Comp IV
  * TMC0904NL CP0904A (die labeled 4A0970D-04A)

  This is small tabletop Mastermind game; a code-breaking game where the player
  needs to find out the correct sequence of colours (numbers in our case).
  It is known as Logic 5 in Europe, and as Pythaligoras in Japan.

  Press the R key to start, followed by a set of unique numbers and E.
  Refer to the official manual for more information.


  TODO:
  - MCU clock is unknown

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

#include "emu.h"
#include "cpu/tms0980/tms0980.h"

#include "comp4.lh"

// master clock is unknown, the value below is an approximation
#define MASTER_CLOCK (250000)


class comp4_state : public driver_device
{
public:
	comp4_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_button_matrix(*this, "IN")
	{ }

	required_device<cpu_device> m_maincpu;
	required_ioport_array<3> m_button_matrix;

	UINT16 m_o;

	UINT16 m_leds_state;
	UINT8 m_leds_decay[0x10];

	DECLARE_READ8_MEMBER(read_k);
	DECLARE_WRITE16_MEMBER(write_o);
	DECLARE_WRITE16_MEMBER(write_r);

	TIMER_DEVICE_CALLBACK_MEMBER(leds_decay_tick);
	void leds_update();

	virtual void machine_start();
};


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

  LEDs

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

// The device strobes the outputs very fast, it is unnoticeable to the user.
// To prevent flickering here, we need to simulate a decay.

// decay time, in steps of 10ms
#define LEDS_DECAY_TIME 2

void comp4_state::leds_update()
{
	for (int i = 0; i < 0x10; i++)
	{
		// turn on powered leds
		if (m_leds_state >> i & 1)
			m_leds_decay[i] = LEDS_DECAY_TIME;

		// send to output
		output_set_lamp_value(i, (m_leds_decay[i] != 0) ? 1 : 0);
	}
}

TIMER_DEVICE_CALLBACK_MEMBER(comp4_state::leds_decay_tick)
{
	// slowly turn off unpowered leds
	for (int i = 0; i < 0x10; i++)
		if (!(m_leds_state >> i & 1) && m_leds_decay[i])
			m_leds_decay[i]--;

	leds_update();
}



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

  I/O

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

READ8_MEMBER(comp4_state::read_k)
{
	UINT8 k = 0;

	// read selected button rows
	for (int i = 0; i < 3; i++)
		if (m_o >> (i+1) & 1)
			k |= m_button_matrix[i]->read();

	return k;
}

WRITE16_MEMBER(comp4_state::write_r)
{
	// LEDs:
	// R4    R9
	// R10!  R8
	// R2    R7
	// R1    R6
	// R0    R5
	m_leds_state = data;
	leds_update();
}

WRITE16_MEMBER(comp4_state::write_o)
{
	// O0: LEDs common (always writes 1)
	// O1-O3: input mux
	// other bits: N/C
	m_o = data;
}



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

  Inputs

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

static INPUT_PORTS_START( comp4 )
	PORT_START("IN.0") // O1
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CODE(KEYCODE_DEL) PORT_CODE(KEYCODE_DEL_PAD) PORT_NAME("R")
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_1_PAD) PORT_NAME("1")
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_4_PAD) PORT_NAME("4")
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_7_PAD) PORT_NAME("7")

	PORT_START("IN.1") // O2
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CODE(KEYCODE_0_PAD) PORT_NAME("0")
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_2_PAD) PORT_NAME("2")
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_5_PAD) PORT_NAME("5")
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CODE(KEYCODE_8_PAD) PORT_NAME("8")

	PORT_START("IN.2") // O3
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CODE(KEYCODE_ENTER) PORT_CODE(KEYCODE_ENTER_PAD) PORT_NAME("E")
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_3_PAD) PORT_NAME("3")
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_6_PAD) PORT_NAME("6")
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CODE(KEYCODE_9_PAD) PORT_NAME("9")
INPUT_PORTS_END



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

  Machine Config

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

void comp4_state::machine_start()
{
	// zerofill
	m_leds_state = 0;
	memset(m_leds_decay, 0, sizeof(m_leds_decay));

	m_o = 0;

	// register for savestates
	save_item(NAME(m_leds_state));
	save_item(NAME(m_leds_decay));

	save_item(NAME(m_o));
}


static MACHINE_CONFIG_START( comp4, comp4_state )

	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", TMS0970, MASTER_CLOCK)
	MCFG_TMS1XXX_READ_K_CB(READ8(comp4_state, read_k))
	MCFG_TMS1XXX_WRITE_O_CB(WRITE16(comp4_state, write_o))
	MCFG_TMS1XXX_WRITE_R_CB(WRITE16(comp4_state, write_r))

	MCFG_TIMER_DRIVER_ADD_PERIODIC("leds_decay", comp4_state, leds_decay_tick, attotime::from_msec(10))

	MCFG_DEFAULT_LAYOUT(layout_comp4)

	/* no video! */

	/* no sound! */
MACHINE_CONFIG_END



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

  Game driver(s)

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

ROM_START( comp4 )
	ROM_REGION( 0x0400, "maincpu", 0 )
	ROM_LOAD( "tmc0904nl_cp0904a", 0x0000, 0x0400, CRC(6233ee1b) SHA1(738e109b38c97804b4ec52bed80b00a8634ad453) )

	ROM_REGION( 782, "maincpu:ipla", 0 )
	ROM_LOAD( "tms0970_default_ipla.pla", 0, 782, CRC(e038fc44) SHA1(dfc280f6d0a5828d1bb14fcd59ac29caf2c2d981) )
	ROM_REGION( 860, "maincpu:mpla", 0 )
	ROM_LOAD( "tms0970_comp4_mpla.pla", 0, 860, CRC(ee9d7d9e) SHA1(25484e18f6a07f7cdb21a07220e2f2a82fadfe7b) )
	ROM_REGION( 352, "maincpu:opla", 0 )
	ROM_LOAD( "tms0970_comp4_opla.pla", 0, 352, CRC(a0f887d1) SHA1(3c666663d484d5bed81e1014f8715aab8a3d489f) )
	ROM_REGION( 157, "maincpu:spla", 0 )
	ROM_LOAD( "tms0970_comp4_spla.pla", 0, 157, CRC(e5bddd90) SHA1(4b1c6512c70e5bcd23c2dbf0c88cd8aa2c632a10) )
ROM_END


CONS( 1977, comp4, 0, 0, comp4, comp4, driver_device, 0, "Milton Bradley", "Comp IV", GAME_SUPPORTS_SAVE | GAME_NO_SOUND_HW )