summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/drivers/mod8.c
blob: 76c4abe721265ea51e4103e582c08cf45d8ea007 (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
/***************************************************************************

        Microsystems International Limited MOD-8

        M.I.L. was formed in 1968 from a joint venture between the Canadian
        Government and Northern Telecom. It produced a variety of computer
        chips, eproms, etc, plus parts for the telephone company. It folded
        in 1975.
        (Info from http://www.cse.yorku.ca/museum/v_tour/artifacts/artifacts.htm)


        14/06/2011 Modernised & above notes added.
        02/12/2009 Working driver [Miodrag Milanovic]
        18/11/2009 Skeleton driver.

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

#include "emu.h"
#include "cpu/i8008/i8008.h"
#include "machine/teleprinter.h"

class mod8_state : public driver_device
{
public:
	mod8_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
	m_teleprinter(*this, TELEPRINTER_TAG)
	{ }

	required_device<teleprinter_device> m_teleprinter;
	DECLARE_WRITE8_MEMBER(out_w);
	DECLARE_WRITE8_MEMBER(tty_w);
	DECLARE_WRITE8_MEMBER(kbd_put);
	DECLARE_READ8_MEMBER(tty_r);
	UINT16 m_tty_data;
	UINT8 m_tty_key_data;
	int m_tty_cnt;
};

WRITE8_MEMBER( mod8_state::out_w )
{
	m_tty_data >>= 1;
	m_tty_data |= BIT(data, 0) ? 0x8000 : 0;
	m_tty_cnt++;

	if (m_tty_cnt == 10)
	{
		m_teleprinter->write(space, 0, (m_tty_data >> 7) & 0x7f);
		m_tty_cnt = 0;
	}
}

WRITE8_MEMBER( mod8_state::tty_w )
{
	m_tty_data = 0;
	m_tty_cnt = 0;
}

READ8_MEMBER( mod8_state::tty_r )
{
	UINT8 d = m_tty_key_data & 1;
	m_tty_key_data >>= 1;
	return d;
}

static ADDRESS_MAP_START(mod8_mem, AS_PROGRAM, 8, mod8_state)
	ADDRESS_MAP_UNMAP_HIGH
	AM_RANGE(0x000,0x6ff) AM_ROM
	AM_RANGE(0x700,0xfff) AM_RAM
ADDRESS_MAP_END

static ADDRESS_MAP_START(mod8_io, AS_IO, 8, mod8_state)
	ADDRESS_MAP_UNMAP_HIGH
	ADDRESS_MAP_GLOBAL_MASK(0xff)
	AM_RANGE(0x00,0x00) AM_READ(tty_r)
	AM_RANGE(0x0a,0x0a) AM_WRITE(out_w)
	AM_RANGE(0x0b,0x0b) AM_WRITE(tty_w)
ADDRESS_MAP_END

/* Input ports */
static INPUT_PORTS_START( mod8 )
INPUT_PORTS_END

static IRQ_CALLBACK ( mod8_irq_callback )
{
	return 0xC0; // LAA - NOP equivalent
}

static MACHINE_RESET(mod8)
{
	device_set_irq_callback(machine.device("maincpu"), mod8_irq_callback);
}

WRITE8_MEMBER( mod8_state::kbd_put )
{
	m_tty_key_data = data ^ 0xff;
	machine().device("maincpu")->execute().set_input_line(0, HOLD_LINE);
}

static GENERIC_TELEPRINTER_INTERFACE( teleprinter_intf )
{
	DEVCB_DRIVER_MEMBER(mod8_state, kbd_put)
};

static MACHINE_CONFIG_START( mod8, mod8_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu",I8008, 800000)
	MCFG_CPU_PROGRAM_MAP(mod8_mem)
	MCFG_CPU_IO_MAP(mod8_io)

	MCFG_MACHINE_RESET(mod8)

	/* video hardware */
	MCFG_GENERIC_TELEPRINTER_ADD(TELEPRINTER_TAG, teleprinter_intf)
MACHINE_CONFIG_END


/* ROM definition */
ROM_START( mod8 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "mon8.001", 0x0000, 0x0100, CRC(b82ac6b8) SHA1(fbea5a6dd4c779ca1671d84089f857a3f548ffcb))
	ROM_LOAD( "mon8.002", 0x0100, 0x0100, CRC(8b82bc3c) SHA1(66222511527b27e56a5a1f9656d424d407eac7d3))
	ROM_LOAD( "mon8.003", 0x0200, 0x0100, CRC(679ae913) SHA1(22423efcb9051c9812fcbac9a27af70415d0dd81))
	ROM_LOAD( "mon8.004", 0x0300, 0x0100, CRC(2a4e580f) SHA1(8b0cb9660fde3cacd299faaa31724e4f3262d77f))
	ROM_LOAD( "mon8.005", 0x0400, 0x0100, CRC(e281bb1a) SHA1(cc7c2746e075512dbf5eed88ae3aea009558dbd0))
	ROM_LOAD( "mon8.006", 0x0500, 0x0100, CRC(b7e2f585) SHA1(5408adabc3df6e6ea8dcfb2327b2883b435ab85e))
	ROM_LOAD( "mon8.007", 0x0600, 0x0100, CRC(49a5c626) SHA1(66c1865db9151818d3b20ec3c68dd793cb98a221))
ROM_END

/* Driver */

/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT    INIT   COMPANY                      FULLNAME       FLAGS */
COMP( 1974, mod8,   0,       0,      mod8,      mod8, driver_device,    0, "Microsystems International Ltd", "MOD-8", GAME_NO_SOUND_HW)