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popobear - stop abusing 8-bit region for vram

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This commit is contained in:
David Haywood 2013-03-13 09:37:17 +00:00
parent 4dfadd3171
commit 83e7c659dd
1 changed files with 21 additions and 22 deletions
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43
src/mame/drivers/popobear.c
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@ -105,8 +105,8 @@ public:
required_shared_ptr<UINT16> m_spr;
required_shared_ptr<UINT16> m_vregs;
UINT8* m_vram;
UINT8* m_vram_rearranged;
UINT16* m_vram;
UINT16* m_vram_rearranged;
int tilemap_base[4];
int tilemap_size[4];
@ -126,26 +126,25 @@ public:
TILE_GET_INFO_MEMBER(get_popobear_bg2_tile_info);
TILE_GET_INFO_MEMBER(get_popobear_bg3_tile_info);
// why are we using 8-bit anyway?
DECLARE_WRITE8_MEMBER(popo_vram_w)
DECLARE_WRITE16_MEMBER(popo_vram_w)
{
m_vram[offset^1] = data;
COMBINE_DATA(&m_vram[offset]);
// the graphic data for the tiles is in a strange order, rearrange it so that we can use it as tiles..
int swapped_offset = BITSWAP32(offset, /* unused bits */ 31,30,29,28,27,26,25,24,23,22,21,20, /* end unused bits */
int swapped_offset = BITSWAP32(offset, /* unused bits */ 31,30,29,28,27,26,25,24,23,22,21,20,19, /* end unused bits */
19,18,17,16,15,14,13,
18,17,16,15,14,13,12,
9,8,7,6,5,4,3,
8,7,6,5,4,3,2,
12,11,10, /* y tile address bits */
11,10,9, /* y tile address bits */
2,1,0 /* x tile address bits */);
1,0 /* x tile address bits */);
m_vram_rearranged[swapped_offset] = data;
machine().gfx[m_gfx_index]->mark_dirty((swapped_offset^1)/2);
COMBINE_DATA(&m_vram_rearranged[swapped_offset]);
machine().gfx[m_gfx_index]->mark_dirty((swapped_offset)/32);
// unfortunately tilemaps and tilegfx share the same ram so we're always dirty if we write to RAM
m_bg_tilemap[0]->mark_all_dirty();
@ -154,7 +153,7 @@ public:
m_bg_tilemap[3]->mark_all_dirty();
}
DECLARE_READ8_MEMBER(popo_vram_r) { return m_vram[offset^1]; }
DECLARE_READ16_MEMBER(popo_vram_r) { return m_vram[offset]; }
};
@ -165,7 +164,7 @@ static const gfx_layout popobear_char_layout =
0x4000,
8,
{ 0,1,2,3,4,5,6,7 },
{ 0,8,16,24,32,40,48,56 },
{ 8,0,24,16,40,32,56,48 },
{ 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64 },
8*64
};
@ -174,28 +173,28 @@ static const gfx_layout popobear_char_layout =
TILE_GET_INFO_MEMBER(popobear_state::get_popobear_bg0_tile_info)
{
int base = tilemap_base[0];
int tileno = (m_vram[base + tile_index*2 + 1]<<8) | m_vram[base + tile_index*2 + 0];
int tileno = m_vram[base/2 + tile_index];
SET_TILE_INFO_MEMBER(0, tileno, 0, 0);
}
TILE_GET_INFO_MEMBER(popobear_state::get_popobear_bg1_tile_info)
{
int base = tilemap_base[1];
int tileno = (m_vram[base + tile_index*2 + 1]<<8) | m_vram[base + tile_index*2 + 0];
int tileno = m_vram[base/2 + tile_index];
SET_TILE_INFO_MEMBER(0, tileno, 0, 0);
}
TILE_GET_INFO_MEMBER(popobear_state::get_popobear_bg2_tile_info)
{
int base = tilemap_base[2];
int tileno = (m_vram[base + tile_index*2 + 1]<<8) | m_vram[base + tile_index*2 + 0];
int tileno = m_vram[base/2 + tile_index];
SET_TILE_INFO_MEMBER(0, tileno, 0, 0);
}
TILE_GET_INFO_MEMBER(popobear_state::get_popobear_bg3_tile_info)
{
int base = tilemap_base[3];
int tileno = (m_vram[base + tile_index*2 + 1]<<8) | m_vram[base + tile_index*2 + 0];
int tileno = m_vram[base/2 + tile_index];
SET_TILE_INFO_MEMBER(0, tileno, 0, 0);
}
@ -211,8 +210,8 @@ void popobear_state::video_start()
assert(m_gfx_index != MAX_GFX_ELEMENTS);
m_vram = auto_alloc_array_clear(machine(), UINT8, 0x100000);
m_vram_rearranged = auto_alloc_array_clear(machine(), UINT8, 0x100000);
m_vram = auto_alloc_array_clear(machine(), UINT16, 0x100000/2);
m_vram_rearranged = auto_alloc_array_clear(machine(), UINT16, 0x100000/2);
/* create the char set (gfx will then be updated dynamically from RAM) */
@ -353,8 +352,8 @@ static ADDRESS_MAP_START( popobear_mem, AS_PROGRAM, 16, popobear_state )
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x000000, 0x03ffff) AM_ROM
AM_RANGE(0x210000, 0x21ffff) AM_RAM
AM_RANGE(0x280000, 0x2fffff) AM_RAM AM_SHARE("spr") // unknown boundaries, 0x2ff800 contains a sprite list
AM_RANGE(0x300000, 0x3fffff) AM_READWRITE8( popo_vram_r, popo_vram_w, 0xffff )
AM_RANGE(0x280000, 0x2fffff) AM_RAM AM_SHARE("spr") // unknown boundaries, 0x2ff800 contains a sprite list, lower area = sprite gfx
AM_RANGE(0x300000, 0x3fffff) AM_READWRITE( popo_vram_r, popo_vram_w ) // tile definitions + tilemaps
/* Most if not all of these are vregs */