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Diffstat (limited to 'src/mame/video/zerozone.c')
-rw-r--r--src/mame/video/zerozone.c50
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;
+}