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r34576 Friday 23rd January, 2015 at 22:39:33 UTC by Angelo Salese
It's a kind of (D)MAgic (sets up basic VRAM)

[/branches/kale/src/mess/drivers]

c65.c

branches/kale/src/mess/drivers/c65.c

r243087	r243088
29	29	m_palette(*this, "palette"),
30	30	m_palred(*this, "redpal"),
31	31	m_palgreen(*this, "greenpal"),
32		m_palblue(*this, "bluepal")
33
	32	m_palblue(*this, "bluepal"),
	33	m_dmalist(*this, "dmalist")
34	34	{ }
35	35
36	36	// devices
37		required_device<cpu_device> m_maincpu;
	37	required_device<m4510_device> m_maincpu;
38	38	required_device<screen_device> m_screen;
39	39	required_device<palette_device> m_palette;
40	40	required_shared_ptr<UINT8> m_palred;
41	41	required_shared_ptr<UINT8> m_palgreen;
42	42	required_shared_ptr<UINT8> m_palblue;
	43	required_shared_ptr<UINT8> m_dmalist;
43	44
44	45	DECLARE_READ8_MEMBER(vic4567_dummy_r);
45	46	DECLARE_WRITE8_MEMBER(vic4567_dummy_w);
46	47	DECLARE_WRITE8_MEMBER(PalRed_w);
47	48	DECLARE_WRITE8_MEMBER(PalGreen_w);
48	49	DECLARE_WRITE8_MEMBER(PalBlue_w);
	50	DECLARE_WRITE8_MEMBER(DMAgic_w);
49	51
50	52	// screen updates
51	53	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
r243087	r243088
60	62	virtual void video_start();
61	63	private:
62	64	void PalEntryFlush(UINT8 offset);
	65	void DMAgicExecute(address_space &space,UINT32 address);
63	66	};
64	67
65	68	void c65_state::video_start()
r243087	r243088
86	89	return res;
87	90	}
88	91
89		printf("%02x\n",offset); // TODO: PC
	92	if(!space.debugger_access())
	93	printf("%02x\n",offset); // TODO: PC
90	94	return res;
91	95	}
92	96
r243087	r243088
99	103	any other write vic-ii mode
100	104	*/
101	105	//case 0x2f: break;
102		default: printf("%02x %02x\n",offset,data); break;
	106	default:
	107	if(!space.debugger_access())
	108	printf("%02x %02x\n",offset,data);
	109	break;
103	110	}
104	111
105	112	}
r243087	r243088
127	134	PalEntryFlush(offset);
128	135	}
129	136
	137	void c65_state::DMAgicExecute(address_space &space,UINT32 address)
	138	{
	139	UINT8 cmd;// = space.read_byte(address++);
	140	UINT16 length; //= space.read_byte(address++);
	141	UINT32 src, dst;
	142	static const char *const dma_cmd_string[] =
	143	{
	144	"COPY",                 // 0
	145	"MIX",
	146	"SWAP",
	147	"FILL"
	148	};
	149	cmd = space.read_byte(address++);
	150	length = space.read_byte(address++);
	151	length|=(space.read_byte(address++)<<8);
	152	src = space.read_byte(address++);
	153	src|=(space.read_byte(address++)<<8);
	154	src|=(space.read_byte(address++)<<16);
	155	dst = space.read_byte(address++);
	156	dst|=(space.read_byte(address++)<<8);
	157	dst|=(space.read_byte(address++)<<16);
130	158
	159	switch(cmd & 3)
	160	{
	161	case 3: // fill
	162	{
	163	/* TODO: upper bits of source */
	164	printf("DMAgic %s %02x -> %08x %04x (CHAIN=%s)\n",dma_cmd_string[cmd & 3],src & 0xff,dst,length,cmd & 4 ? "yes" : "no");
	165	UINT8 FillValue;
	166	UINT32 DestIndex;
	167	UINT16 SizeIndex;
	168	FillValue = src & 0xff;
	169	DestIndex = dst & 0xfffff;
	170	SizeIndex = length;
	171	do
	172	{
	173	space.write_byte(DestIndex++,FillValue);
	174	SizeIndex--;
	175	}while(SizeIndex != 0);
	176	}
	177	return;
	178	}
	179	printf("DMAgic %s %08x %08x %04x (CHAIN=%s)\n",dma_cmd_string[cmd & 3],src,dst,length,cmd & 4 ? "yes" : "no");
	180	}
	181
	182
	183	WRITE8_MEMBER(c65_state::DMAgic_w)
	184	{
	185	m_dmalist[offset] = data;
	186	if(offset == 0)
	187	DMAgicExecute(space,(m_dmalist[0])|(m_dmalist[1]<<8)|(m_dmalist[2]<<16));
	188	}
	189
	190
	191
131	192	static ADDRESS_MAP_START( c65_map, AS_PROGRAM, 8, c65_state )
132	193	AM_RANGE(0x00000, 0x01fff) AM_RAM // TODO: bank
133	194	AM_RANGE(0x0c800, 0x0cfff) AM_ROM AM_REGION("maincpu", 0xc800)
r243087	r243088
140	201	// 0x0d400, 0x0d4*f Right SID
141	202	// 0x0d440, 0x0d4*f Left  SID
142	203	// 0x0d600, 0x0d6** UART
143		// 0x0d700, 0x0d7** DMAgic
	204	AM_RANGE(0x0d700, 0x0d702) AM_WRITE(DMAgic_w) AM_SHARE("dmalist") // 0x0d700, 0x0d7** DMAgic
	205	//AM_RANGE(0x0d703, 0x0d703) AM_READ(DMAgic_r)
144	206	// 0x0d800, 0x0d8** Color matrix
145	207	// 0x0dc00, 0x0dc** CIA-1
146	208	// 0x0dd00, 0x0dd** CIA-2
147	209	// 0x0de00, 0x0de** Ext I/O Select 1
148	210	AM_RANGE(0x0df00, 0x0dfff) AM_RAM // 0x0df00, 0x0df** Ext I/O Select 2 (RAM window?)
	211	AM_RANGE(0x10000, 0x1f7ff) AM_RAM
	212	AM_RANGE(0x1f800, 0x1ffff) AM_RAM // VRAM
149	213	AM_RANGE(0x20000, 0x3ffff) AM_ROM AM_REGION("maincpu",0)
150	214	ADDRESS_MAP_END
151	215

https://github.com/mamedev/mame/commit/b05c21dd698982d7c9ba9fb37cad7dca2e7ff114

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