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r10554 Wednesday 23rd February, 2011 at 11:11:15 UTC by Robbbert
[AL8800BT] Modernised.

[src/mess/drivers]

altair.c

src/mess/drivers/altair.c

r10553	r10554
4	4
5	5	04/12/2009 Initial driver by Miodrag Milanovic
6	6
	7	Commands:
	8	All commands must be in uppercase. Address and data is
	9	specified in Octal format (not hex).
	10
	11	Press space to input your command line (not return).
	12
	13	D - ? (prints random characters)
	14	J - ? (does nothing noticeable)
	15	M - Modify memory
	16
7	17	****************************************************************************/
	18	#define ADDRESS_MAP_MODERN
8	19
9	20	#include "emu.h"
10	21	#include "cpu/i8085/i8085.h"
r10553	r10554
16	27	{
17	28	public:
18	29	altair_state(running_machine &machine, const driver_device_config_base &config)
19		: driver_device(machine, config) { }
	30	: driver_device(machine, config),
	31	m_maincpu(*this, "maincpu")
	32	{ }
20	33
	34	required_device<cpu_device> m_maincpu;
	35	DECLARE_READ8_MEMBER( sio_status_r );
	36	DECLARE_READ8_MEMBER( sio_data_r );
	37	DECLARE_READ8_MEMBER( sio_key_status_r );
	38	DECLARE_WRITE8_MEMBER( sio_command_w );
	39	DECLARE_WRITE8_MEMBER( altair_kbd_put );
21	40	UINT8 term_data;
22	41	UINT8* ram;
23	42	};
24	43
25	44
26	45
27		static READ8_HANDLER(sio_status_r)
	46	READ8_MEMBER(altair_state::sio_status_r)
28	47	{
29		altair_state *state = space->machine->driver_data<altair_state>();
30		if (state->term_data!=0) return 0x01; // data in
	48	if (term_data!=0) return 0x01; // data in
31	49	return 0x02; // ready
32	50	}
33	51
34		static WRITE8_HANDLER(sio_command_w)
	52	WRITE8_MEMBER(altair_state::sio_command_w)
35	53	{
36	54
37	55	}
38	56
39		static READ8_HANDLER(sio_data_r)
	57	READ8_MEMBER(altair_state::sio_data_r)
40	58	{
41		altair_state *state = space->machine->driver_data<altair_state>();
42		UINT8 retVal = state->term_data;
43		state->term_data = 0;
	59	UINT8 retVal = term_data;
	60	term_data = 0;
44	61	return retVal;
45	62	}
46	63
47		static WRITE8_HANDLER(sio_data_w)
	64	READ8_MEMBER(altair_state::sio_key_status_r)
48	65	{
49		device_t *devconf = space->machine->device(TERMINAL_TAG);
50		terminal_write(devconf,0,data);
	66	return (term_data!=0) ? 0x40 : 0x01;
51	67	}
52	68
53		static READ8_HANDLER(sio_key_status_r)
54		{
55		altair_state *state = space->machine->driver_data<altair_state>();
56		return (state->term_data!=0) ? 0x40 : 0x01;
57		}
58
59		static ADDRESS_MAP_START(altair_mem, ADDRESS_SPACE_PROGRAM, 8)
	69	static ADDRESS_MAP_START(altair_mem, ADDRESS_SPACE_PROGRAM, 8, altair_state)
60	70	ADDRESS_MAP_UNMAP_HIGH
61		AM_RANGE( 0x0000, 0xfcff ) AM_RAM AM_BASE_MEMBER(altair_state, ram)
	71	AM_RANGE( 0x0000, 0xfcff ) AM_RAM AM_BASE(ram)
62	72	AM_RANGE( 0xfd00, 0xfdff ) AM_ROM
63	73	AM_RANGE( 0xff00, 0xffff ) AM_ROM
64	74	ADDRESS_MAP_END
65	75
66		static ADDRESS_MAP_START( altair_io , ADDRESS_SPACE_IO, 8)
	76	static ADDRESS_MAP_START(altair_io, ADDRESS_SPACE_IO, 8, altair_state)
67	77	ADDRESS_MAP_UNMAP_HIGH
	78	ADDRESS_MAP_GLOBAL_MASK(0xff)
68	79	AM_RANGE( 0x00, 0x00 ) AM_READ(sio_key_status_r)
69		AM_RANGE( 0x01, 0x01 ) AM_READWRITE(sio_data_r,sio_data_w)
	80	AM_RANGE( 0x01, 0x01 ) AM_MIRROR(0x10) AM_READ(sio_data_r)
	81	AM_RANGE( 0x01, 0x01 ) AM_MIRROR(0x10) AM_DEVWRITE_LEGACY(TERMINAL_TAG, terminal_write)
70	82	AM_RANGE( 0x10, 0x10 ) AM_READWRITE(sio_status_r,sio_command_w)
71		AM_RANGE( 0x11, 0x11 ) AM_READWRITE(sio_data_r,sio_data_w)
72	83	ADDRESS_MAP_END
73	84
74	85	/* Input ports */
r10553	r10554
101	112	state->term_data = 0;
102	113	}
103	114
104		static WRITE8_DEVICE_HANDLER( altair_kbd_put )
	115	WRITE8_MEMBER( altair_state::altair_kbd_put )
105	116	{
106		altair_state *state = device->machine->driver_data<altair_state>();
107		state->term_data = data;
	117	term_data = data;
108	118	}
109	119
110	120	static GENERIC_TERMINAL_INTERFACE( altair_terminal_intf )
111	121	{
112		DEVCB_HANDLER(altair_kbd_put)
	122	DEVCB_DRIVER_MEMBER(altair_state, altair_kbd_put)
113	123	};
114	124
115	125	static MACHINE_CONFIG_START( altair, altair_state )
116		/* basic machine hardware */
117		MCFG_CPU_ADD("maincpu", I8080, XTAL_2MHz)
118		MCFG_CPU_PROGRAM_MAP(altair_mem)
119		MCFG_CPU_IO_MAP(altair_io)
	126	/* basic machine hardware */
	127	MCFG_CPU_ADD("maincpu", I8080, XTAL_2MHz)
	128	MCFG_CPU_PROGRAM_MAP(altair_mem)
	129	MCFG_CPU_IO_MAP(altair_io)
120	130
121		MCFG_MACHINE_RESET(altair)
	131	MCFG_MACHINE_RESET(altair)
122	132
123	133	/* video hardware */
124	134	MCFG_FRAGMENT_ADD( generic_terminal )
r10553	r10554
130	140
131	141	/* ROM definition */
132	142	ROM_START( al8800bt )
133		ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	143	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
134	144	ROM_LOAD( "turnmon.bin",  0xfd00, 0x0100, CRC(5c629294) SHA1(125c76216954b681721fff84a3aca05094b21a28))
135	145	ROM_LOAD( "88dskrom.bin", 0xff00, 0x0100, CRC(7c5232f3) SHA1(24f940ad70ad2829e1bc800c6790b6e993e6ebf6))
136	146	ROM_END
r10553	r10554
138	148	/* Driver */
139	149
140	150	/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT    INIT     COMPANY   FULLNAME       FLAGS */
141		COMP( 1975, al8800bt,  0,       0,   altair,    altair,     0,   "MITS",   "Altair 8800bt",      GAME_NOT_WORKING | GAME_NO_SOUND)
	151	COMP( 1975, al8800bt,  0,       0,   altair,    altair,     0,   "MITS",   "Altair 8800bt", GAME_NOT_WORKING | GAME_NO_SOUND_HW)
142	152

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