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r8615 Sunday 25th July, 2010 at 10:13:02 UTC by Angelo Salese
[RX78]: Hooked up proper videoram routines

[src/mess/drivers]

rx78.c

src/mess/drivers/rx78.c

r8614	r8615
5	5	preliminary driver by Angelo Salese
6	6
7	7	TODO:
8		- Rewrite vram routines, they aren't quite right (we're currently drawing
9		stuff from the work ram and not the proper bitmap buffer)
	8	- caps lock doesn't seem quite right;
	9	- implement cmt / printer (hovewer no dumps are available right now)
	10	- implement joystick inputs
10	11
11	12	****************************************************************************/
12	13
r8614	r8615
15	16	#include "sound/sn76496.h"
16	17	#include "devices/cartslot.h"
17	18
	19	static UINT8 vram_read_bank,vram_write_bank,pal_reg[7],pri_mask;
	20
18	21	static VIDEO_START( rx78 )
19	22	{
20	23	}
21	24
22	25	static VIDEO_UPDATE( rx78 )
23	26	{
24		UINT8 y,ra,chr,gfx;
25		UINT16 sy=0,ma=0xe8be,x;
26		UINT8 *RAM = memory_region(screen->machine, "maincpu");
	27	static UINT8 *vram = memory_region(screen->machine,"vram");
	28	int x,y,count;
27	29
28		/* TODO: screw this up */
29		for (y = 0; y < 23; y++)
	30	bitmap_fill(bitmap, cliprect, screen->machine->pens[0x10]);
	31
	32	count = 0x2c0; //first 0x2bf bytes aren't used for bitmap drawing apparently
	33
	34	for(y=0;y<184;y++)
30	35	{
31		for (ra = 0; ra < 8; ra++)
	36	for(x=0;x<192;x+=8)
32	37	{
33		UINT16  *p = BITMAP_ADDR16(bitmap, sy++, 0);
	38	int color,pen[3],i;
34	39
35		for (x = ma; x < ma+30; x++)
	40	for (i = 0; i < 8; i++)
36	41	{
37		chr = RAM[x];
	42	/* bg color */
	43	pen[0] = (pri_mask & 0x08) ? (vram[count + 0x6000] >> (i)) : 0x00;
	44	pen[1] = (pri_mask & 0x10) ? (vram[count + 0x8000] >> (i)) : 0x00;
	45	pen[2] = (pri_mask & 0x20) ? (vram[count + 0xa000] >> (i)) : 0x00;
38	46
39		/* get pattern of pixels for that character scanline */
40		gfx = RAM[0x1a27 + (chr<<3) + ra];
	47	color  = ((pen[0] & 1) << 0);
	48	color |= ((pen[1] & 1) << 1);
	49	color |= ((pen[2] & 1) << 2);
41	50
42		/* Display a scanline of a character (8 pixels) */
43		*p = ( gfx & 0x01 ) ? 1 : 0; p++;
44		*p = ( gfx & 0x02 ) ? 1 : 0; p++;
45		*p = ( gfx & 0x04 ) ? 1 : 0; p++;
46		*p = ( gfx & 0x08 ) ? 1 : 0; p++;
47		*p = ( gfx & 0x10 ) ? 1 : 0; p++;
48		*p = ( gfx & 0x20 ) ? 1 : 0; p++;
49		*p = ( gfx & 0x40 ) ? 1 : 0; p++;
50		*p = ( gfx & 0x80 ) ? 1 : 0; p++;
	51	if(color)
	52	*BITMAP_ADDR16(bitmap, y, x+i) = screen->machine->pens[color];
	53
	54	/* fg color */
	55	pen[0] = (pri_mask & 0x01) ? (vram[count + 0x0000] >> (i)) : 0x00;
	56	pen[1] = (pri_mask & 0x02) ? (vram[count + 0x2000] >> (i)) : 0x00;
	57	pen[2] = (pri_mask & 0x04) ? (vram[count + 0x4000] >> (i)) : 0x00;
	58
	59	color  = ((pen[0] & 1) << 0);
	60	color |= ((pen[1] & 1) << 1);
	61	color |= ((pen[2] & 1) << 2);
	62
	63	if(color)
	64	*BITMAP_ADDR16(bitmap, y, x+i) = screen->machine->pens[color];
51	65	}
	66	count++;
52	67	}
53		ma+=30;
54	68	}
	69
55	70	return 0;
56	71	}
57	72
r8614	r8615
86	101	key_mux = data;
87	102	}
88	103
	104	static READ8_HANDLER( rx78_vram_r )
	105	{
	106	static UINT8 *vram = memory_region(space->machine,"vram");
89	107
	108	if(vram_read_bank == 0 || vram_read_bank > 6)
	109	return 0xff;
	110
	111	return vram[offset + ((vram_read_bank - 1) * 0x2000)];
	112	}
	113
	114	static WRITE8_HANDLER( rx78_vram_w )
	115	{
	116	static UINT8 *vram = memory_region(space->machine,"vram");
	117
	118	if(vram_write_bank & 0x01) { vram[offset + 0 * 0x2000] = data; }
	119	if(vram_write_bank & 0x02) { vram[offset + 1 * 0x2000] = data; }
	120	if(vram_write_bank & 0x04) { vram[offset + 2 * 0x2000] = data; }
	121	if(vram_write_bank & 0x08) { vram[offset + 3 * 0x2000] = data; }
	122	if(vram_write_bank & 0x10) { vram[offset + 4 * 0x2000] = data; }
	123	if(vram_write_bank & 0x20) { vram[offset + 5 * 0x2000] = data; }
	124	}
	125
	126	static WRITE8_HANDLER( vram_read_bank_w )
	127	{
	128	vram_read_bank = data;
	129	}
	130
	131	static WRITE8_HANDLER( vram_write_bank_w )
	132	{
	133	vram_write_bank = data;
	134	}
	135
	136	static WRITE8_HANDLER( vdp_reg_w )
	137	{
	138	UINT8 r,g,b,res,i;
	139
	140	pal_reg[offset] = data;
	141
	142	for(i=0;i<16;i++)
	143	{
	144	res = ((i & 1) ? pal_reg[0 + (i & 8 ? 3 : 0)] : 0) | ((i & 2) ? pal_reg[1 + (i & 8 ? 3 : 0)] : 0) | ((i & 4) ? pal_reg[2 + (i & 8 ? 3 : 0)] : 0);
	145	if(res & pal_reg[6]) //color mask, TODO: check this
	146	res &= pal_reg[6];
	147
	148	r = (res & 0x11) == 0x11 ? 0xff : ((res & 0x11) == 0x01 ? 0x7f : 0x00);
	149	g = (res & 0x22) == 0x22 ? 0xff : ((res & 0x22) == 0x02 ? 0x7f : 0x00);
	150	b = (res & 0x44) == 0x44 ? 0xff : ((res & 0x44) == 0x04 ? 0x7f : 0x00);
	151
	152	palette_set_color(space->machine, i, MAKE_RGB(r,g,b));
	153	}
	154	}
	155
	156	static WRITE8_HANDLER( vdp_bg_reg_w )
	157	{
	158	int r,g,b;
	159
	160	r = (data & 0x11) == 0x11 ? 0xff : ((data & 0x11) == 0x01 ? 0x7f : 0x00);
	161	g = (data & 0x22) == 0x22 ? 0xff : ((data & 0x22) == 0x02 ? 0x7f : 0x00);
	162	b = (data & 0x44) == 0x44 ? 0xff : ((data & 0x44) == 0x04 ? 0x7f : 0x00);
	163
	164	palette_set_color(space->machine, 0x10, MAKE_RGB(r,g,b));
	165	}
	166
	167	static WRITE8_HANDLER( vdp_pri_mask_w )
	168	{
	169	pri_mask = data;
	170	}
	171
90	172	static ADDRESS_MAP_START(rx78_mem, ADDRESS_SPACE_PROGRAM, 8)
91	173	ADDRESS_MAP_UNMAP_HIGH
92	174	AM_RANGE(0x0000, 0x1fff) AM_ROM
93	175	AM_RANGE(0x2000, 0x5fff) AM_ROM AM_REGION("cart_img", 0x0000)
94		AM_RANGE(0x6000, 0xffff) AM_RAM AM_REGION("maincpu", 0x6000)
95		/*
96		base memory map:
97		AM_RANGE(0x0000, 0x1fff) AM_ROM
98		AM_RANGE(0x2000, 0x5fff) AM_ROM //cart
99		AM_RANGE(0x6000, 0xafff) AM_RAM //ext ram
100		AM_RANGE(0xb000, 0xebff) AM_RAM //work ram
101		AM_RANGE(0xec00, 0xffff) AM_RAM //bitmap vram (banked)
102		*/
	176	AM_RANGE(0x6000, 0xafff) AM_RAM //ext RAM
	177	AM_RANGE(0xb000, 0xebff) AM_RAM
	178	AM_RANGE(0xec00, 0xffff) AM_READWRITE(rx78_vram_r, rx78_vram_w)
103	179	ADDRESS_MAP_END
104	180
105	181	static ADDRESS_MAP_START( rx78_io , ADDRESS_SPACE_IO, 8)
r8614	r8615
108	184	//   AM_RANGE(0xe2, 0xe2) AM_READNOP AM_WRITENOP //printer
109	185	//   AM_RANGE(0xe3, 0xe3) AM_WRITENOP //printer
110	186	//   AM_RANGE(0xf0, 0xf0) AM_NOP //cmt
111		//   AM_RANGE(0xf1, 0xf2) AM_WRITENOP //memory banking
	187	AM_RANGE(0xf1, 0xf1) AM_WRITE(vram_read_bank_w)
	188	AM_RANGE(0xf2, 0xf2) AM_WRITE(vram_write_bank_w)
112	189	AM_RANGE(0xf4, 0xf4) AM_READWRITE(key_r,key_w) //keyboard
113		//   AM_RANGE(0xf5, 0xfc) AM_WRITENOP //vdp
114		//   AM_RANGE(0xfe, 0xfe) AM_WRITENOP //vdp pmask
	190	AM_RANGE(0xf5, 0xfb) AM_WRITE(vdp_reg_w) //vdp
	191	AM_RANGE(0xfc, 0xfc) AM_WRITE(vdp_bg_reg_w) //vdp
	192	AM_RANGE(0xfe, 0xfe) AM_WRITE(vdp_pri_mask_w)
115	193	AM_RANGE(0xff, 0xff) AM_DEVWRITE("sn1",sn76496_w) //psg
116	194	ADDRESS_MAP_END
117	195
r8614	r8615
172	250	PORT_BIT(0x02,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y')
173	251	PORT_BIT(0x04,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z')
174	252	PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("[") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[')
175		PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("\\") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\')
	253	PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("\\") PORT_CODE(KEYCODE_BACKSLASH)
176	254	PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("]") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']')
177		PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Arrow Up") //???
178		PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
	255	PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Up Down Arrow") //???
	256	PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Right Left Arrow") //???
179	257
180	258	PORT_START("KEY6")
181	259	PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
r8614	r8615
185	263	PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT)
186	264	PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("HOME") PORT_CODE(KEYCODE_HOME)
187	265	PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_UNUSED )
188		PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("<unknown>") //clear screen?
	266	PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("INST / DEL") PORT_CODE(KEYCODE_BACKSPACE)
189	267
190	268	PORT_START("KEY7")
191	269	PORT_BIT(0x07,IP_ACTIVE_HIGH,IPT_UNUSED )
192		PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("<unknown>") //0x08, goes to new line
	270	PORT_BIT(0x08,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("STOP")
193	271	PORT_BIT(0x10,IP_ACTIVE_HIGH,IPT_UNUSED )
194	272	PORT_BIT(0x20,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(27)
195	273	PORT_BIT(0x40,IP_ACTIVE_HIGH,IPT_UNUSED )
196		PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("<unknown>") //0x14, cursor change
	274	PORT_BIT(0x80,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("SHIFT LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE
197	275
198	276	PORT_START("KEY8")
199	277	PORT_BIT(0x01,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) //kana shift?
r8614	r8615
254	332	MDRV_SCREEN_REFRESH_RATE(50)
255	333	MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
256	334	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
257		MDRV_SCREEN_SIZE(240, 184)
258		MDRV_SCREEN_VISIBLE_AREA(0, 240-1, 0, 184-1)
259		MDRV_PALETTE_LENGTH(2)
260		MDRV_PALETTE_INIT(black_and_white)
	335	MDRV_SCREEN_SIZE(192, 184)
	336	MDRV_SCREEN_VISIBLE_AREA(0, 192-1, 0, 184-1)
	337	MDRV_PALETTE_LENGTH(16+1) //+1 for the background color
	338	//  MDRV_PALETTE_INIT(black_and_white)
261	339	MDRV_GFXDECODE(rx78)
262	340
263	341	MDRV_VIDEO_START(rx78)
r8614	r8615
269	347
270	348	MDRV_SPEAKER_STANDARD_MONO("mono")
271	349
272		MDRV_SOUND_ADD("sn1", SN76489A, 1996800) // unknown clock / divider
	350	MDRV_SOUND_ADD("sn1", SN76489A, 3579545) // unknown divider
273	351	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
274	352	MACHINE_DRIVER_END
275	353
r8614	r8615
280	358
281	359	ROM_REGION( 0x4000, "cart_img", ROMREGION_ERASEFF )
282	360	ROM_CART_LOAD("cart", 0x0000, 0x4000, ROM_OPTIONAL | ROM_NOMIRROR)
	361
	362	ROM_REGION( 6 * 0x2000, "vram", ROMREGION_ERASE00 )
283	363	ROM_END
284	364
285	365	/* Driver */

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