summaryrefslogtreecommitdiffstats
path: root/src/mame/drivers/junior.cpp
blob: 5cd9ce62852ba261e7832d396366f580b0c798c1 (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
263
264
265
266
267
268
// license:BSD-3-Clause
// copyright-holders:Robbbert
// thanks-to:Manfred Schneider
/***************************************************************************

        Elektor Junior

        17/07/2009 Skeleton driver.

This is heavily based on the KIM-1, the keycodes and operation being
identical.

Pasting:
        0-F : as is
        + (inc) : ^
        AD : -
        DA : =
        GO : X

(note: DA only works when addressing RAM)

Test Paste:
        =11^22^33^44^55^66^77^88^99^-0000
        Now press up-arrow to confirm the data has been entered.

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

#include "emu.h"
#include "cpu/m6502/m6502.h"
#include "machine/mos6530n.h"
#include "machine/timer.h"
#include "junior.lh"


class junior_state : public driver_device
{
public:
	junior_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_riot(*this, "riot")
		, m_maincpu(*this, "maincpu")
		, m_line(*this, "LINE%u", 0U)
		, m_digit(*this, "digit%u", 0U)
	{
	}

	DECLARE_INPUT_CHANGED_MEMBER(junior_reset);
	void junior(machine_config &config);

protected:
	DECLARE_READ8_MEMBER(junior_riot_a_r);
	DECLARE_READ8_MEMBER(junior_riot_b_r);
	DECLARE_WRITE8_MEMBER(junior_riot_a_w);
	DECLARE_WRITE8_MEMBER(junior_riot_b_w);

	virtual void machine_start() override;
	virtual void machine_reset() override;
	TIMER_DEVICE_CALLBACK_MEMBER(junior_update_leds);

	void junior_mem(address_map &map);

private:
	required_device<mos6532_new_device> m_riot;
	uint8_t m_port_a;
	uint8_t m_port_b;
	uint8_t m_led_time[6];
	required_device<cpu_device> m_maincpu;
	required_ioport_array<4> m_line;
	output_finder<6> m_digit;
};




void junior_state::junior_mem(address_map &map)
{
	map.global_mask(0x1FFF);
	map.unmap_value_high();
	map(0x0000, 0x03ff).ram(); // 1K RAM
	map(0x1a00, 0x1a7f).m(m_riot, FUNC(mos6532_new_device::ram_map));
	map(0x1a80, 0x1a9f).m(m_riot, FUNC(mos6532_new_device::io_map));
	map(0x1c00, 0x1fff).rom(); // Monitor
}


INPUT_CHANGED_MEMBER(junior_state::junior_reset)
{
	if (newval == 0)
		m_maincpu->reset();
}


/* Input ports */
static INPUT_PORTS_START( junior )
PORT_START("LINE0")         /* IN0 keys row 0 */
	PORT_BIT( 0x80, 0x00, IPT_UNUSED )
	PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
	PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1')
	PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2')
	PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3')
	PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4')
	PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5')
	PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6')

	PORT_START("LINE1")         /* IN1 keys row 1 */
	PORT_BIT( 0x80, 0x00, IPT_UNUSED )
	PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7')
	PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
	PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
	PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A')
	PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B')
	PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
	PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D')

	PORT_START("LINE2")         /* IN2 keys row 2 */
	PORT_BIT( 0x80, 0x00, IPT_UNUSED )
	PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E')
	PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F')
	PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("AD") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
	PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("DA") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=')
	PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
	PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
	PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("PC") PORT_CODE(KEYCODE_F6)

	PORT_START("LINE3")         /* IN3 STEP and RESET keys, MODE switch */
	PORT_BIT( 0x80, 0x00, IPT_UNUSED )
	PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("sw1: ST") PORT_CODE(KEYCODE_F7)
	PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("sw2: RST") PORT_CODE(KEYCODE_F3) PORT_CHANGED_MEMBER(DEVICE_SELF, junior_state, junior_reset, nullptr)
	PORT_DIPNAME(0x10, 0x10, "sw3: SS (NumLock)") PORT_CODE(KEYCODE_NUMLOCK) PORT_TOGGLE
	PORT_DIPSETTING( 0x00, "single step")
	PORT_DIPSETTING( 0x10, "run")
	PORT_BIT( 0x08, 0x00, IPT_UNUSED )
	PORT_BIT( 0x04, 0x00, IPT_UNUSED )
	PORT_BIT( 0x02, 0x00, IPT_UNUSED )
	PORT_BIT( 0x01, 0x00, IPT_UNUSED )
INPUT_PORTS_END



READ8_MEMBER( junior_state::junior_riot_a_r )
{
	uint8_t data = 0xff;

	uint8_t const sel = ( m_port_b >> 1) & 0x0f;
	switch ( sel )
	{
	case 0:
	case 1:
	case 2:
		data = m_line[sel]->read();
		break;
	}
	return data;

}


READ8_MEMBER( junior_state::junior_riot_b_r )
{
	if ( m_port_b & 0x20 )
		return 0xFF;

	return 0x7F;

}


WRITE8_MEMBER( junior_state::junior_riot_a_w )
{
	uint8_t idx = ( m_port_b >> 1 ) & 0x0f;

	m_port_a = data;

	if ((idx >= 4 && idx < 10) & ( m_port_a != 0xff ))
	{
		m_digit[idx - 4] = m_port_a ^ 0x7f;
		m_led_time[idx - 4] = 10;
	}
}


WRITE8_MEMBER( junior_state::junior_riot_b_w )
{
	uint8_t idx = ( data >> 1 ) & 0x0f;

	m_port_b = data;

	if ((idx >= 4 && idx < 10) & ( m_port_a != 0xff ))
	{
		m_digit[idx - 4] = m_port_a ^ 0x7f;
		m_led_time[idx - 4] = 10;
	}
}


TIMER_DEVICE_CALLBACK_MEMBER(junior_state::junior_update_leds)
{
	int i;

	for ( i = 0; i < 6; i++ )
	{
		if ( m_led_time[i] )
			m_led_time[i]--;
		else
			m_digit[i] = 0;
	}
}


void junior_state::machine_start()
{
	m_digit.resolve();

	save_item(NAME(m_port_a));
	save_item(NAME(m_port_b));
	save_item(NAME(m_led_time));
}


void junior_state::machine_reset()
{
	int i;

	for ( i = 0; i < 6; i++ )
		m_led_time[i] = 0;
}


MACHINE_CONFIG_START(junior_state::junior)
	/* basic machine hardware */
	MCFG_DEVICE_ADD("maincpu",M6502, 1_MHz_XTAL)
	MCFG_DEVICE_PROGRAM_MAP(junior_mem)
	MCFG_QUANTUM_TIME(attotime::from_hz(50))

	/* video hardware */
	MCFG_DEFAULT_LAYOUT( layout_junior )

	/* Devices */
	MCFG_DEVICE_ADD("riot", MOS6532_NEW, 1_MHz_XTAL)
	MCFG_MOS6530n_IN_PA_CB(READ8(*this, junior_state, junior_riot_a_r))
	MCFG_MOS6530n_OUT_PA_CB(WRITE8(*this, junior_state, junior_riot_a_w))
	MCFG_MOS6530n_IN_PB_CB(READ8(*this, junior_state, junior_riot_b_r))
	MCFG_MOS6530n_OUT_PB_CB(WRITE8(*this, junior_state, junior_riot_b_w))
	MCFG_MOS6530n_IRQ_CB(INPUTLINE("maincpu", M6502_IRQ_LINE))

	MCFG_TIMER_DRIVER_ADD_PERIODIC("led_timer", junior_state, junior_update_leds, attotime::from_hz(50))
MACHINE_CONFIG_END


/* ROM definition */
ROM_START( junior )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_DEFAULT_BIOS("orig")

	ROM_SYSTEM_BIOS( 0, "orig", "Original ESS503" )
	ROMX_LOAD( "ess503.ic2", 0x1c00, 0x0400, CRC(9e804f8c) SHA1(181bdb69fb4711cb008e7966747d4775a5e3ef69), ROM_BIOS(1))

	ROM_SYSTEM_BIOS( 1, "mod-orig", "Mod-Original (2708)" )
	ROMX_LOAD( "junior-mod.ic2", 0x1c00, 0x0400, CRC(ee8aa69d) SHA1(a132a51603f1a841c354815e6d868b335ac84364), ROM_BIOS(2))

	ROM_SYSTEM_BIOS( 2, "2732", "Just monitor (2732)" )
	ROMX_LOAD( "junior27321a.ic2", 0x1c00, 0x0400, CRC(e22f24cc) SHA1(a6edb52a9eea5e99624c128065e748e5a3fb2e4c), ROM_BIOS(3))
ROM_END

/* Driver */

/*    YEAR  NAME    PARENT  COMPAT  MACHINE  INPUT   CLASS         INIT        COMPANY                FULLNAME           FLAGS */
COMP( 1980, junior, 0,      0,      junior,  junior, junior_state, empty_init, "Elektor Electronics", "Junior Computer", MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND_HW)