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r21825 Wednesday 13th March, 2013 at 09:37:17 UTC by David Haywood
popobear - stop abusing 8-bit region for vram

[src/mame/drivers]

popobear.c

trunk/src/mame/drivers/popobear.c

r21824	r21825
105	105	required_shared_ptr<UINT16> m_spr;
106	106	required_shared_ptr<UINT16> m_vregs;
107	107
108		UINT8* m_vram;
109		UINT8* m_vram_rearranged;
	108	UINT16* m_vram;
	109	UINT16* m_vram_rearranged;
110	110
111	111	int tilemap_base[4];
112	112	int tilemap_size[4];
r21824	r21825
126	126	TILE_GET_INFO_MEMBER(get_popobear_bg2_tile_info);
127	127	TILE_GET_INFO_MEMBER(get_popobear_bg3_tile_info);
128	128
129		// why are we using 8-bit anyway?
130		DECLARE_WRITE8_MEMBER(popo_vram_w)
	129	DECLARE_WRITE16_MEMBER(popo_vram_w)
131	130	{
132		m_vram[offset^1] = data;
	131	COMBINE_DATA(&m_vram[offset]);
133	132
134	133	// the graphic data for the tiles is in a strange order, rearrange it so that we can use it as tiles..
135		int swapped_offset = BITSWAP32(offset, /* unused bits */ 31,30,29,28,27,26,25,24,23,22,21,20, /* end unused bits */
	134	int swapped_offset = BITSWAP32(offset, /* unused bits */ 31,30,29,28,27,26,25,24,23,22,21,20,19, /* end unused bits */
136	135
137		19,18,17,16,15,14,13,
	136	18,17,16,15,14,13,12,
138	137
139		9,8,7,6,5,4,3,
	138	8,7,6,5,4,3,2,
140	139
141		12,11,10, /* y tile address bits */
	140	11,10,9, /* y tile address bits */
142	141
143		2,1,0 /* x tile address bits */);
	142	1,0 /* x tile address bits */);
144	143
145	144
146	145
147		m_vram_rearranged[swapped_offset] = data;
148		machine().gfx[m_gfx_index]->mark_dirty((swapped_offset^1)/2);
	146	COMBINE_DATA(&m_vram_rearranged[swapped_offset]);
	147	machine().gfx[m_gfx_index]->mark_dirty((swapped_offset)/32);
149	148
150	149	// unfortunately tilemaps and tilegfx share the same ram so we're always dirty if we write to RAM
151	150	m_bg_tilemap[0]->mark_all_dirty();
r21824	r21825
154	153	m_bg_tilemap[3]->mark_all_dirty();
155	154
156	155	}
157		DECLARE_READ8_MEMBER(popo_vram_r) { return m_vram[offset^1]; }
	156	DECLARE_READ16_MEMBER(popo_vram_r) { return m_vram[offset]; }
158	157
159	158	};
160	159
r21824	r21825
165	164	0x4000,
166	165	8,
167	166	{ 0,1,2,3,4,5,6,7 },
168		{ 0,8,16,24,32,40,48,56 },
	167	{ 8,0,24,16,40,32,56,48 },
169	168	{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64 },
170	169	8*64
171	170	};
r21824	r21825
174	173	TILE_GET_INFO_MEMBER(popobear_state::get_popobear_bg0_tile_info)
175	174	{
176	175	int base = tilemap_base[0];
177		int tileno = (m_vram[base + tile_index*2 + 1]<<8) | m_vram[base + tile_index*2 + 0];
	176	int tileno = m_vram[base/2 + tile_index];
178	177	SET_TILE_INFO_MEMBER(0, tileno, 0, 0);
179	178	}
180	179
181	180	TILE_GET_INFO_MEMBER(popobear_state::get_popobear_bg1_tile_info)
182	181	{
183	182	int base = tilemap_base[1];
184		int tileno = (m_vram[base + tile_index*2 + 1]<<8) | m_vram[base + tile_index*2 + 0];
	183	int tileno = m_vram[base/2 + tile_index];
185	184	SET_TILE_INFO_MEMBER(0, tileno, 0, 0);
186	185	}
187	186
188	187	TILE_GET_INFO_MEMBER(popobear_state::get_popobear_bg2_tile_info)
189	188	{
190	189	int base = tilemap_base[2];
191		int tileno = (m_vram[base + tile_index*2 + 1]<<8) | m_vram[base + tile_index*2 + 0];
	190	int tileno = m_vram[base/2 + tile_index];
192	191	SET_TILE_INFO_MEMBER(0, tileno, 0, 0);
193	192	}
194	193
195	194	TILE_GET_INFO_MEMBER(popobear_state::get_popobear_bg3_tile_info)
196	195	{
197	196	int base = tilemap_base[3];
198		int tileno = (m_vram[base + tile_index*2 + 1]<<8) | m_vram[base + tile_index*2 + 0];
	197	int tileno = m_vram[base/2 + tile_index];
199	198	SET_TILE_INFO_MEMBER(0, tileno, 0, 0);
200	199	}
201	200
r21824	r21825
211	210
212	211	assert(m_gfx_index != MAX_GFX_ELEMENTS);
213	212
214		m_vram = auto_alloc_array_clear(machine(), UINT8, 0x100000);
215		m_vram_rearranged = auto_alloc_array_clear(machine(), UINT8, 0x100000);
	213	m_vram = auto_alloc_array_clear(machine(), UINT16, 0x100000/2);
	214	m_vram_rearranged = auto_alloc_array_clear(machine(), UINT16, 0x100000/2);
216	215
217	216
218	217	/* create the char set (gfx will then be updated dynamically from RAM) */
r21824	r21825
353	352	ADDRESS_MAP_UNMAP_HIGH
354	353	AM_RANGE(0x000000, 0x03ffff) AM_ROM
355	354	AM_RANGE(0x210000, 0x21ffff) AM_RAM
356		AM_RANGE(0x280000, 0x2fffff) AM_RAM AM_SHARE("spr") // unknown boundaries, 0x2ff800 contains a sprite list
357		AM_RANGE(0x300000, 0x3fffff) AM_READWRITE8( popo_vram_r, popo_vram_w, 0xffff )
	355	AM_RANGE(0x280000, 0x2fffff) AM_RAM AM_SHARE("spr") // unknown boundaries, 0x2ff800 contains a sprite list, lower area = sprite gfx
	356	AM_RANGE(0x300000, 0x3fffff) AM_READWRITE( popo_vram_r, popo_vram_w ) // tile definitions + tilemaps
358	357
359	358
360	359	/* Most if not all of these are vregs */

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