summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/bob85.cpp
blob: 45c61c8113c3bbb2f338afe119a07e722831f7ad (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
261
262
// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************

BOB85 driver by Miodrag Milanovic

2008-05-24 Preliminary driver.
2009-05-12 Skeleton driver.
2013-06-02 Working driver.
2019-07-14 Fixed cassette load - it loads correctly then says EEEE

Pasting:
        0-F : as is
        NEXT : ^
        SMEM : -
        GO : X

Test Paste:
        -0600^11^22^33^44^55^66^77^88^99^--0600^
        Now press up-arrow to confirm the data has been entered.


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

#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/timer.h"
#include "imagedev/cassette.h"
#include "speaker.h"
#include "bob85.lh"


class bob85_state : public driver_device
{
public:
	bob85_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_maincpu(*this, "maincpu")
		, m_cass(*this, "cassette")
		, m_line0(*this, "LINE0")
		, m_line1(*this, "LINE1")
		, m_line2(*this, "LINE2")
		, m_digits(*this, "digit%u", 0U)
		{ }

	void bob85(machine_config &config);

private:
	void io_map(address_map &map);
	void mem_map(address_map &map);
	uint8_t bob85_keyboard_r();
	void bob85_7seg_w(offs_t offset, uint8_t data);
	DECLARE_WRITE_LINE_MEMBER(sod_w);
	DECLARE_READ_LINE_MEMBER(sid_r);
	TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
	uint8_t m_prev_key;
	uint8_t m_count_key;
	u16 m_casscnt;
	bool m_cassold, m_cassbit;
	void machine_start() override;
	required_device<i8085a_cpu_device> m_maincpu;
	required_device<cassette_image_device> m_cass;
	required_ioport m_line0;
	required_ioport m_line1;
	required_ioport m_line2;
	output_finder<6> m_digits;
};



uint8_t bob85_state::bob85_keyboard_r()
{
	uint8_t retVal = 0;
	uint8_t line0 = m_line0->read();
	uint8_t line1 = m_line1->read();
	uint8_t line2 = m_line2->read();

	if (line0)
	{
		switch(line0)
		{
			case 0x01 : retVal = 0x80; break;
			case 0x02 : retVal = 0x81; break;
			case 0x04 : retVal = 0x82; break;
			case 0x08 : retVal = 0x83; break;
			case 0x10 : retVal = 0x84; break;
			case 0x20 : retVal = 0x85; break;
			case 0x40 : retVal = 0x86; break;
			case 0x80 : retVal = 0x87; break;
			default : break;
		}
	}

	if (line1)
	{
		switch(line1)
		{
			case 0x01 : retVal = 0x88; break;
			case 0x02 : retVal = 0x89; break;
			case 0x04 : retVal = 0x8A; break;
			case 0x08 : retVal = 0x8B; break;
			case 0x10 : retVal = 0x8C; break;
			case 0x20 : retVal = 0x8D; break;
			case 0x40 : retVal = 0x8E; break;
			case 0x80 : retVal = 0x8F; break;
			default : break;
		}
	}

	if (line2)
	{
		switch(line2)
		{
			case 0x01 : retVal |= 0x90; break;
			case 0x02 : retVal |= 0xA0; break;
			case 0x04 : retVal |= 0xB0; break;
			case 0x08 : retVal |= 0xC0; break;
			case 0x10 : retVal |= 0xD0; break;
			case 0x20 : retVal |= 0xE0; break;
			default : break;
		}
	}

	if (retVal != m_prev_key)
	{
		m_prev_key = retVal;
		m_count_key = 0;
		return retVal;
	}
	else
	{
		if (m_count_key <1)
		{
			m_count_key++;
			return retVal;
		}
		else
			return 0;
	}
}

void bob85_state::bob85_7seg_w(offs_t offset, uint8_t data)
{
	m_digits[offset] = bitswap<8>( data,3,2,1,0,7,6,5,4 );
}

void bob85_state::mem_map(address_map &map)
{
	map.unmap_value_high();
	map(0x0000, 0x02ff).rom();
	map(0x0600, 0x09ff).ram();
}

void bob85_state::io_map(address_map &map)
{
	map.unmap_value_high();
	map(0x0a, 0x0a).r(FUNC(bob85_state::bob85_keyboard_r));
	map(0x0a, 0x0f).w(FUNC(bob85_state::bob85_7seg_w));
}

/* Input ports */
static INPUT_PORTS_START( bob85 )
	PORT_START("LINE0")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7')

	PORT_START("LINE1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9')
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('F')

	PORT_START("LINE2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("GO") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("SMEM") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("REC") PORT_CODE(KEYCODE_R) PORT_CHAR('R')
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("VEK1") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("VEK2") PORT_CODE(KEYCODE_W) PORT_CHAR('W')
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("NEXT") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
	PORT_BIT(0xC0, IP_ACTIVE_HIGH, IPT_UNUSED)
INPUT_PORTS_END

void bob85_state::machine_start()
{
	m_digits.resolve();
	save_item(NAME(m_prev_key));
	save_item(NAME(m_count_key));
	save_item(NAME(m_casscnt));
	save_item(NAME(m_cassold));
	save_item(NAME(m_cassbit));
}

TIMER_DEVICE_CALLBACK_MEMBER( bob85_state::kansas_r )
{
	/* cassette - turn pulses into a bit */
	bool cass_ws = (m_cass->input() > +0.04) ? 1 : 0;
	m_casscnt++;

	if (cass_ws != m_cassold)
	{
		m_cassold = cass_ws;
		m_cassbit = (m_casscnt < 12) ? 1 : 0;
		m_casscnt = 0;
	}
	else
	if (m_casscnt > 32)
	{
		m_casscnt = 32;
		m_cassbit = 0;
	}
}

WRITE_LINE_MEMBER( bob85_state::sod_w )
{
	m_cass->output(state ? +1.0 : -1.0);
}

READ_LINE_MEMBER( bob85_state::sid_r )
{
	return m_cassbit;
}

void bob85_state::bob85(machine_config &config)
{
	/* basic machine hardware */
	I8085A(config, m_maincpu, XTAL(5'000'000));
	m_maincpu->set_addrmap(AS_PROGRAM, &bob85_state::mem_map);
	m_maincpu->set_addrmap(AS_IO, &bob85_state::io_map);
	m_maincpu->in_sid_func().set(FUNC(bob85_state::sid_r));
	m_maincpu->out_sod_func().set(FUNC(bob85_state::sod_w));

	/* video hardware */
	config.set_default_layout(layout_bob85);

	SPEAKER(config, "mono").front_center();

	// devices
	CASSETTE(config, m_cass).set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
	m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
	TIMER(config, "kansas_r").configure_periodic(FUNC(bob85_state::kansas_r), attotime::from_hz(40000));
}

/* ROM definition */
ROM_START( bob85 )
	ROM_REGION( 0x0300, "maincpu", 0 )
	ROM_LOAD( "bob85.rom", 0x0000, 0x0300, BAD_DUMP CRC(adde33a8) SHA1(00f26dd0c52005e7705e6cc9cb11a20e572682c6) ) // should be 6 separate 74S287's (256x4)
ROM_END

/* Driver */

//    YEAR  NAME   PARENT  COMPAT  MACHINE  INPUT  CLASS        INIT        COMPANY             FULLNAME  FLAGS
COMP( 1984, bob85, 0,      0,      bob85,   bob85, bob85_state, empty_init, "Josef Kratochvil", "BOB-85", MACHINE_NO_SOUND_HW | MACHINE_SUPPORTS_SAVE )