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r9906 Monday 3rd January, 2011 at 14:34:04 UTC by Robbbert
[DIM68K] Added speaker. Added mc6845 (text only atm). Dummy handler for fdc.

[src/mess/drivers]

dim68k.c

src/mess/drivers/dim68k.c

r9905	r9906
5	5	28/12/2011 Skeleton driver.
6	6
7	7	****************************************************************************/
	8	//#define ADDRESS_MAP_MODERN
8	9
9	10	#include "emu.h"
10	11	#include "cpu/m68000/m68000.h"
	12	#include "sound/speaker.h"
	13	#include "video/mc6845.h"
11	14
12	15	class dim68k_state : public driver_device
13	16	{
14	17	public:
15	18	dim68k_state(running_machine &machine, const driver_device_config_base &config)
16		: driver_device(machine, config) { }
	19	: driver_device(machine, config),
	20	m_maincpu(*this, "maincpu"),
	21	m_crtc(*this, "crtc"),
	22	m_speaker(*this, "speaker")
	23	{ }
17	24
	25	required_device<cpu_device> m_maincpu;
	26	required_device<device_t> m_crtc;
	27	required_device<device_t> m_speaker;
	28	//DECLARE_READ16_MEMBER( dim68k_speaker_r );
	29	//DECLARE_WRITE16_MEMBER( dim68k_speaker_w );
	30	//DECLARE_READ16_MEMBER( dim68k_fdc_r );
	31	//DECLARE_WRITE16_MEMBER( dim68k_fdc_w );
18	32	UINT16* ram;
19	33	UINT8 *FNT;
	34	UINT8 m_speaker_bit;
20	35	};
21	36
22		static ADDRESS_MAP_START(dim68k_mem, ADDRESS_SPACE_PROGRAM, 16)
	37	static READ16_HANDLER( dim68k_speaker_r )
	38	{
	39	dim68k_state *state = space->machine->driver_data<dim68k_state>();
	40	state->m_speaker_bit ^= 1;
	41	speaker_level_w(state->m_speaker, state->m_speaker_bit);
	42	return 0;
	43	}
	44
	45	static WRITE16_HANDLER( dim68k_speaker_w )
	46	{
	47	dim68k_state *state = space->machine->driver_data<dim68k_state>();
	48	state->m_speaker_bit ^= 1;
	49	speaker_level_w(state->m_speaker, state->m_speaker_bit);
	50	}
	51
	52	static READ16_HANDLER( dim68k_fdc_r )
	53	{
	54	return 0;
	55	}
	56
	57	static WRITE16_HANDLER( dim68k_fdc_w )
	58	{
	59	}
	60
	61	static ADDRESS_MAP_START(dim68k_mem, ADDRESS_SPACE_PROGRAM, 16)//, dim68k_state)
23	62	ADDRESS_MAP_UNMAP_HIGH
24	63	AM_RANGE(0x00000000, 0x00feffff) AM_RAM AM_BASE_MEMBER(dim68k_state, ram) // 16MB RAM / ROM at boot
25	64	AM_RANGE(0x00ff0000, 0x00ff1fff) AM_ROM AM_REGION("user1",0)
26		AM_RANGE(0x00ff2000, 0x00ff7fff) AM_RAM // Video RAM
27		AM_RANGE(0x00ff8000, 0x00ffffff) AM_RAM // I/O Region
	65	AM_RANGE(0x00ff2000, 0x00ff7fff) AM_RAM // Graphics Video RAM
	66	AM_RANGE(0x00ff8000, 0x00ff8001) AM_DEVREADWRITE8("crtc", mc6845_status_r, mc6845_address_w, 0xffff)
	67	AM_RANGE(0x00ff8002, 0x00ff8003) AM_DEVREADWRITE8("crtc", mc6845_register_r, mc6845_register_w, 0xffff)
	68	AM_RANGE(0x00ffc800, 0x00ffc801) AM_READWRITE(dim68k_speaker_r,dim68k_speaker_w)
	69	AM_RANGE(0x00ffd000, 0x00ffd005) AM_READWRITE(dim68k_fdc_r,dim68k_fdc_w)
	70	//AM_RANGE(0x00ff8000, 0x00ffffff) AM_RAM // I/O Region
28	71	ADDRESS_MAP_END
29	72
30	73	/* Input ports */
r9905	r9906
48	91	state->FNT = machine->region("chargen")->base();
49	92	}
50	93
51		// Please note: This is NOT how the real video works. It is a sample, until the driver is rewritten.
52	94	static VIDEO_UPDATE( dim68k )
53	95	{
54	96	dim68k_state *state = screen->machine->driver_data<dim68k_state>();
55		UINT8 y,ra,chr,gfx;
56		UINT16 sy=0,ma=0x100,x,dchr;
	97	mc6845_update(state->m_crtc, bitmap, cliprect);
	98	return 0;
	99	}
57	100
58		for (y = 0; y < 25; y++)
59		{
60		for (ra = 0; ra < 10; ra++)
61		{
62		UINT16  *p = BITMAP_ADDR16(bitmap, sy++, 0);
	101	// Text-only; graphics isn't emulated yet
	102	MC6845_UPDATE_ROW( dim68k_update_row )
	103	{
	104	dim68k_state *state = device->machine->driver_data<dim68k_state>();
	105	UINT8 chr,gfx,x,xx,inv;
	106	UINT16 dchr;
63	107
64		for (x = ma; x < ma+40; x++)
65		{
66		dchr = state->ram[x]; // reads 2 characters
67		chr = dchr>>8;
	108	UINT16 *p = BITMAP_ADDR16(bitmap, y, 0);
68	109
69		gfx = state->FNT[(chr<<4) | ra] ^ ((chr & 0x80) ? 0xff : 0);
	110	// need to divide everything in half to cater for 16-bit reads
	111	x_count /= 2;
	112	ma /= 2;
	113	xx = 0;
70	114
71		*p++ = ( gfx & 0x80 ) ? 1 : 0;
72		*p++ = ( gfx & 0x40 ) ? 1 : 0;
73		*p++ = ( gfx & 0x20 ) ? 1 : 0;
74		*p++ = ( gfx & 0x10 ) ? 1 : 0;
75		*p++ = ( gfx & 0x08 ) ? 1 : 0;
76		*p++ = ( gfx & 0x04 ) ? 1 : 0;
77		*p++ = ( gfx & 0x02 ) ? 1 : 0;
78		*p++ = ( gfx & 0x01 ) ? 1 : 0;
	115	for (x = 0; x < x_count; x++)
	116	{
	117	dchr = state->ram[ma+x]; // reads 2 characters
79	118
80		chr = dchr;
	119	inv=0;
	120	if (xx == cursor_x) inv=0xff;
	121	xx++;
81	122
82		gfx = state->FNT[(chr<<4) | ra] ^ ((chr & 0x80) ? 0xff : 0);
	123	chr = dchr>>8;
	124	gfx = state->FNT[(chr<<4) | ra] ^ inv ^ ((chr & 0x80) ? 0xff : 0);
	125	*p++ = ( gfx & 0x80 ) ? 1 : 0;
	126	*p++ = ( gfx & 0x40 ) ? 1 : 0;
	127	*p++ = ( gfx & 0x20 ) ? 1 : 0;
	128	*p++ = ( gfx & 0x10 ) ? 1 : 0;
	129	*p++ = ( gfx & 0x08 ) ? 1 : 0;
	130	*p++ = ( gfx & 0x04 ) ? 1 : 0;
	131	*p++ = ( gfx & 0x02 ) ? 1 : 0;
	132	*p++ = ( gfx & 0x01 ) ? 1 : 0;
83	133
84		*p++ = ( gfx & 0x80 ) ? 1 : 0;
85		*p++ = ( gfx & 0x40 ) ? 1 : 0;
86		*p++ = ( gfx & 0x20 ) ? 1 : 0;
87		*p++ = ( gfx & 0x10 ) ? 1 : 0;
88		*p++ = ( gfx & 0x08 ) ? 1 : 0;
89		*p++ = ( gfx & 0x04 ) ? 1 : 0;
90		*p++ = ( gfx & 0x02 ) ? 1 : 0;
91		*p++ = ( gfx & 0x01 ) ? 1 : 0;
92		}
93		}
94		ma+=40;
	134	inv = 0;
	135	if (xx == cursor_x) inv=0xff;
	136	xx++;
	137
	138	chr = dchr;
	139	gfx = state->FNT[(chr<<4) | ra] ^ inv ^ ((chr & 0x80) ? 0xff : 0);
	140	*p++ = ( gfx & 0x80 ) ? 1 : 0;
	141	*p++ = ( gfx & 0x40 ) ? 1 : 0;
	142	*p++ = ( gfx & 0x20 ) ? 1 : 0;
	143	*p++ = ( gfx & 0x10 ) ? 1 : 0;
	144	*p++ = ( gfx & 0x08 ) ? 1 : 0;
	145	*p++ = ( gfx & 0x04 ) ? 1 : 0;
	146	*p++ = ( gfx & 0x02 ) ? 1 : 0;
	147	*p++ = ( gfx & 0x01 ) ? 1 : 0;
95	148	}
96		return 0;
97	149	}
98	150
99	151	/* F4 Character Displayer */
r9905	r9906
114	166	GFXDECODE_ENTRY( "chargen", 0x0000, dim68k_charlayout, 0, 1 )
115	167	GFXDECODE_END
116	168
	169	static const mc6845_interface dim68k_crtc = {
	170	"screen",         /* name of screen */
	171	8,         /* number of dots per character - switchable 7 or 8 */
	172	NULL,
	173	dim68k_update_row,      /* handler to display a scanline */
	174	NULL,
	175	DEVCB_NULL,
	176	DEVCB_NULL,
	177	DEVCB_NULL,
	178	DEVCB_NULL,
	179	NULL
	180	};
	181
117	182	static MACHINE_CONFIG_START( dim68k, dim68k_state )
118	183	/* basic machine hardware */
119	184	MCFG_CPU_ADD("maincpu", M68000, XTAL_10MHz)
r9905	r9906
134	199
135	200	MCFG_VIDEO_START(dim68k)
136	201	MCFG_VIDEO_UPDATE(dim68k)
	202	MCFG_MC6845_ADD("crtc", MC6845, 1790000, dim68k_crtc)
	203
	204	/* sound hardware */
	205	MCFG_SPEAKER_STANDARD_MONO("mono")
	206	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
	207	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
137	208	MACHINE_CONFIG_END
138	209
139	210	/*
r9905	r9906
193	264	/* Driver */
194	265
195	266	/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT    INIT    COMPANY   FULLNAME       FLAGS */
196		COMP( 1984, dim68k,  0,       0,    dim68k,    dim68k,     0,        "Micro Craft",   "Dimension 68000",      GAME_NOT_WORKING | GAME_NO_SOUND)
	267	COMP( 1984, dim68k,  0,       0,     dim68k,   dim68k, 0,     "Micro Craft", "Dimension 68000", GAME_NOT_WORKING | GAME_NO_SOUND)
197	268

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