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r2dx_v33 - DMA

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This commit is contained in:
David Haywood 2014-09-20 08:59:22 +00:00
parent ee5d9d9fd7
commit cc68355d44
1 changed files with 44 additions and 16 deletions
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60
src/mame/drivers/r2dx_v33.c
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@ -70,6 +70,9 @@ public:
DECLARE_DRIVER_INIT(nzerotea);
DECLARE_DRIVER_INIT(zerotm2k);
DECLARE_WRITE16_MEMBER(r2dx_tilemapdma_w);
DECLARE_WRITE16_MEMBER(r2dx_paldma_w);
void r2dx_setbanking(void);
DECLARE_MACHINE_RESET(r2dx_v33);
@ -279,11 +282,36 @@ WRITE16_MEMBER(r2dx_v33_state::r2dx_sdisth_w)
r2dx_i_sdist = (r2dx_i_sdist & (0x0000ffff | (UINT16(~mem_mask)) << 16)) | ((data & mem_mask) << 16);
}
// these DMA operations seem to use hardcoded addresses on this hardware
WRITE16_MEMBER(r2dx_v33_state::r2dx_tilemapdma_w)
{
int src = 0xd000;
for (int i = 0; i < 0x2800 / 2; i++)
{
UINT16 tileval = space.read_word(src);
src += 2;
m_videoram_private_w(space, i, tileval, 0xffff);
}
}
WRITE16_MEMBER(r2dx_v33_state::r2dx_paldma_w)
{
int src = 0x1f000;
for (int i = 0; i < 0x1000 / 2; i++)
{
UINT16 palval = space.read_word(src);
src += 2;
m_palette->set_pen_color(i, pal5bit(palval >> 0), pal5bit(palval >> 5), pal5bit(palval >> 10));
}
}
static ADDRESS_MAP_START( rdx_v33_map, AS_PROGRAM, 16, r2dx_v33_state )
AM_RANGE(0x00000, 0x003ff) AM_RAM // vectors copied here
AM_RANGE(0x00400, 0x00401) AM_WRITENOP // tilemaps to private buffer
AM_RANGE(0x00402, 0x00403) AM_WRITENOP // palettes to private buffer
AM_RANGE(0x00400, 0x00401) AM_WRITE(r2dx_tilemapdma_w) // tilemaps to private buffer
AM_RANGE(0x00402, 0x00403) AM_WRITE(r2dx_paldma_w) // palettes to private buffer
AM_RANGE(0x00404, 0x00405) AM_WRITE(r2dx_rom_bank_w)
@ -334,13 +362,13 @@ static ADDRESS_MAP_START( rdx_v33_map, AS_PROGRAM, 16, r2dx_v33_state )
AM_RANGE(0x0c000, 0x0c7ff) AM_RAM AM_SHARE("sprites")
AM_RANGE(0x0c800, 0x0cfff) AM_RAM
AM_RANGE(0x0d000, 0x0d7ff) AM_RAM_WRITE(raiden2_background_w) AM_SHARE("back_data")
AM_RANGE(0x0d800, 0x0dfff) AM_RAM_WRITE(raiden2_foreground_w) AM_SHARE("fore_data")
AM_RANGE(0x0e000, 0x0e7ff) AM_RAM_WRITE(raiden2_midground_w) AM_SHARE("mid_data")
AM_RANGE(0x0e800, 0x0f7ff) AM_RAM_WRITE(raiden2_text_w) AM_SHARE("text_data")
AM_RANGE(0x0d000, 0x0d7ff) AM_RAM //_WRITE(raiden2_background_w) AM_SHARE("back_data")
AM_RANGE(0x0d800, 0x0dfff) AM_RAM //_WRITE(raiden2_foreground_w) AM_SHARE("fore_data")
AM_RANGE(0x0e000, 0x0e7ff) AM_RAM //_WRITE(raiden2_midground_w) AM_SHARE("mid_data")
AM_RANGE(0x0e800, 0x0f7ff) AM_RAM //_WRITE(raiden2_text_w) AM_SHARE("text_data")
AM_RANGE(0x0f800, 0x0ffff) AM_RAM /* Stack area */
AM_RANGE(0x10000, 0x1efff) AM_RAM
AM_RANGE(0x1f000, 0x1ffff) AM_RAM_DEVWRITE("palette", palette_device, write) AM_SHARE("palette")
AM_RANGE(0x1f000, 0x1ffff) AM_RAM //_DEVWRITE("palette", palette_device, write) AM_SHARE("palette")
AM_RANGE(0x20000, 0x2ffff) AM_ROM AM_ROMBANK("bank1") AM_WRITENOP
AM_RANGE(0x30000, 0x3ffff) AM_ROM AM_ROMBANK("bank2") AM_WRITENOP
@ -351,8 +379,8 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START( nzeroteam_base_map, AS_PROGRAM, 16, r2dx_v33_state )
AM_RANGE(0x00000, 0x003ff) AM_RAM //stack area
AM_RANGE(0x00400, 0x00401) AM_WRITENOP // tilemaps to private buffer
AM_RANGE(0x00402, 0x00403) AM_WRITENOP // palettes to private buffer
AM_RANGE(0x00400, 0x00401) AM_WRITE(r2dx_tilemapdma_w) // tilemaps to private buffer
AM_RANGE(0x00402, 0x00403) AM_WRITE(r2dx_paldma_w) // palettes to private buffer
// 0x404 is bank on r2dx, this doesn't need it
// AM_RANGE(0x00406, 0x00407) AM_WRITE(tile_bank_w) // not the same?
@ -389,13 +417,13 @@ static ADDRESS_MAP_START( nzeroteam_base_map, AS_PROGRAM, 16, r2dx_v33_state )
AM_RANGE(0x0c000, 0x0c7ff) AM_RAM AM_SHARE("sprites")
AM_RANGE(0x0c800, 0x0cfff) AM_RAM
AM_RANGE(0x0d000, 0x0d7ff) AM_RAM_WRITE(raiden2_background_w) AM_SHARE("back_data")
AM_RANGE(0x0d800, 0x0dfff) AM_RAM_WRITE(raiden2_foreground_w) AM_SHARE("fore_data")
AM_RANGE(0x0e000, 0x0e7ff) AM_RAM_WRITE(raiden2_midground_w) AM_SHARE("mid_data")
AM_RANGE(0x0e800, 0x0f7ff) AM_RAM_WRITE(raiden2_text_w) AM_SHARE("text_data")
AM_RANGE(0x0d000, 0x0d7ff) AM_RAM //_WRITE(raiden2_background_w) AM_SHARE("back_data")
AM_RANGE(0x0d800, 0x0dfff) AM_RAM //_WRITE(raiden2_foreground_w) AM_SHARE("fore_data")
AM_RANGE(0x0e000, 0x0e7ff) AM_RAM //_WRITE(raiden2_midground_w) AM_SHARE("mid_data")
AM_RANGE(0x0e800, 0x0f7ff) AM_RAM //_WRITE(raiden2_text_w) AM_SHARE("text_data")
AM_RANGE(0x0f800, 0x0ffff) AM_RAM /* Stack area */
AM_RANGE(0x10000, 0x1efff) AM_RAM
AM_RANGE(0x1f000, 0x1ffff) AM_RAM_DEVWRITE("palette", palette_device, write) AM_SHARE("palette")
AM_RANGE(0x1f000, 0x1ffff) AM_RAM //_DEVWRITE("palette", palette_device, write) AM_SHARE("palette")
AM_RANGE(0x20000, 0xfffff) AM_ROM AM_REGION("mainprg", 0x20000 )
ADDRESS_MAP_END
@ -647,7 +675,7 @@ static MACHINE_CONFIG_START( rdx_v33, r2dx_v33_state )
MCFG_GFXDECODE_ADD("gfxdecode", "palette", rdx_v33)
MCFG_PALETTE_ADD("palette", 2048)
MCFG_PALETTE_FORMAT(xBBBBBGGGGGRRRRR)
//MCFG_PALETTE_FORMAT(xBBBBBGGGGGRRRRR)
MCFG_VIDEO_START_OVERRIDE(raiden2_state,raiden2)
@ -686,7 +714,7 @@ static MACHINE_CONFIG_START( nzerotea, r2dx_v33_state )
MCFG_GFXDECODE_ADD("gfxdecode", "palette", rdx_v33)
MCFG_PALETTE_ADD("palette", 2048)
MCFG_PALETTE_FORMAT(xBBBBBGGGGGRRRRR)
//MCFG_PALETTE_FORMAT(xBBBBBGGGGGRRRRR)
MCFG_VIDEO_START_OVERRIDE(raiden2_state,raiden2)