diff options
Diffstat (limited to 'src/mame/video/zerozone.c')
-rw-r--r-- | src/mame/video/zerozone.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/mame/video/zerozone.c b/src/mame/video/zerozone.c new file mode 100644 index 00000000000..850eaaa4442 --- /dev/null +++ b/src/mame/video/zerozone.c @@ -0,0 +1,50 @@ +/*************************************************************************** + + video/zerozone.c + +***************************************************************************/ + +#include "driver.h" + +UINT16 *zerozone_videoram; +static UINT16 zerozone_tilebank; + +static tilemap *zerozone_tilemap; + +WRITE16_HANDLER( zerozone_tilemap_w ) +{ + COMBINE_DATA(&zerozone_videoram[offset]); + tilemap_mark_tile_dirty(zerozone_tilemap,offset); +} + + +WRITE16_HANDLER(zerozone_tilebank_w) +{ +// popmessage ("Data %04x",data); + zerozone_tilebank = data & 0x7; + tilemap_mark_all_tiles_dirty(zerozone_tilemap); +} + +static TILE_GET_INFO( get_zerozone_tile_info ) +{ + int tileno,colour; + tileno = zerozone_videoram[tile_index] & 0x07ff; + colour = zerozone_videoram[tile_index] & 0xf000; + + if (zerozone_videoram[tile_index] & 0x0800) tileno += zerozone_tilebank * 0x800; + + SET_TILE_INFO(0,tileno,colour>>12,0); +} + +VIDEO_START( zerozone ) +{ + // i'm not 100% sure it should be opaque, pink title screen looks strange in las vegas girls + // but if its transparent other things look incorrect + zerozone_tilemap = tilemap_create(get_zerozone_tile_info,tilemap_scan_cols,TILEMAP_TYPE_PEN, 8, 8, 64,32); +} + +VIDEO_UPDATE( zerozone ) +{ + tilemap_draw(bitmap,cliprect,zerozone_tilemap,0,0); + return 0; +} |