summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/drivers/evmbug.c
blob: ca777f6e4d701867b48185f58d08e25925247312 (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
/***************************************************************************

        Stuart's Breadboard Project. TMS9995 evaluation kit TMAM6095.

        2013-06-02 Skeleton driver.

        http://www.avjd51.dsl.pipex.com/tms9995_eval_module/tms9995_eval_module.htm


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

#include "emu.h"
#include "cpu/tms9900/tms9900l.h"
#include "machine/terminal.h"

class evmbug_state : public driver_device
{
public:
	evmbug_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_maincpu(*this, "maincpu")
		, m_terminal(*this, TERMINAL_TAG)
		{ }

	DECLARE_READ8_HANDLER(rs232_r);
	DECLARE_WRITE8_HANDLER(rs232_w);
	DECLARE_WRITE8_MEMBER(kbd_put);
	virtual void machine_reset();
	UINT8 m_term_data;
	UINT8 m_term_out;
	required_device<cpu_device> m_maincpu;
	required_device<generic_terminal_device> m_terminal;
};

static ADDRESS_MAP_START( evmbug_mem, AS_PROGRAM, 8, evmbug_state )
	AM_RANGE(0x0000, 0x17ff) AM_ROM
	AM_RANGE(0xec00, 0xefff) AM_RAM
ADDRESS_MAP_END

static ADDRESS_MAP_START( evmbug_io, AS_IO, 8, evmbug_state )
	ADDRESS_MAP_UNMAP_HIGH
	AM_RANGE(0x0000, 0x0007) AM_WRITE(rs232_w)
	AM_RANGE(0x0000, 0x0002) AM_READ(rs232_r)
ADDRESS_MAP_END

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

READ8_MEMBER( evmbug_state::rs232_r )
{
	static UINT8 temp = 0;
	temp^=0xff;
	if (offset == 1)
		return temp;

	if (offset == 2)
	{
		return 0xff;//(m_term_data) ? 0 : 0xff;
	}

	UINT8 ret = m_term_data;
	m_term_data = 0;
	return ret;
}

WRITE8_MEMBER( evmbug_state::rs232_w )
{
	if (offset == 0)
		m_term_out = 0;

	m_term_out |= (data << offset);

	if (offset == 7)
		m_terminal->write(space, 0, m_term_out & 0x7f);
}

WRITE8_MEMBER( evmbug_state::kbd_put )
{
	m_term_data = data;
}

static GENERIC_TERMINAL_INTERFACE( terminal_intf )
{
	DEVCB_DRIVER_MEMBER(evmbug_state, kbd_put)
};


void evmbug_state::machine_reset()
{
	m_term_data = 0;
}

static const struct tms9995reset_param evmbug_processor_config =
{
	0,  /* disable automatic wait state generation */
	0,  /* no IDLE callback */
	0   /* no MP9537 mask */
};

static MACHINE_CONFIG_START( evmbug, evmbug_state )
	/* basic machine hardware */
	/* TMS9995 CPU @ 12.0 MHz */
	MCFG_CPU_ADD("maincpu", TMS9995L, 12000000)
	MCFG_CPU_CONFIG(evmbug_processor_config)
	MCFG_CPU_PROGRAM_MAP(evmbug_mem)
	MCFG_CPU_IO_MAP(evmbug_io)

	/* video hardware */
	MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf)
MACHINE_CONFIG_END

/* ROM definition */
ROM_START( evmbug )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
//  ROM_LOAD( "u8.bin", 0x0000, 0x1000, CRC(bdb8c7bd) SHA1(340829dcb7a65f2e830fd5aff82a312e3ed7918f) )
//  ROM_LOAD( "u9.bin", 0x1000, 0x0800, CRC(4de459ea) SHA1(00a42fe556d4ffe1f85b2ce369f544b07fbd06d9) )
	ROM_LOAD( "evmbug.bin", 0x0000, 0x8000, CRC(a239ec56) SHA1(65b500d7d0f897ce0c320cf3ec32ff4042774599) )
ROM_END

/* Driver */

/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT    INIT    COMPANY                  FULLNAME       FLAGS */
COMP( 19??, evmbug, 0,      0,       evmbug,    evmbug, driver_device,  0,    "Texas Instruments",   "TMAM6095", GAME_NOT_WORKING | GAME_NO_SOUND)