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Diffstat (limited to 'src/mame/video/bottom9.c')
-rw-r--r--src/mame/video/bottom9.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/src/mame/video/bottom9.c b/src/mame/video/bottom9.c
new file mode 100644
index 00000000000..5e4e4ece206
--- /dev/null
+++ b/src/mame/video/bottom9.c
@@ -0,0 +1,97 @@
+#include "driver.h"
+#include "video/konamiic.h"
+
+
+
+int bottom9_video_enable;
+
+static int layer_colorbase[3],sprite_colorbase,zoom_colorbase;
+
+
+/***************************************************************************
+
+ Callbacks for the K052109
+
+***************************************************************************/
+
+static void tile_callback(int layer,int bank,int *code,int *color,int *flags,int *priority)
+{
+ *code |= (*color & 0x3f) << 8;
+ *color = layer_colorbase[layer] + ((*color & 0xc0) >> 6);
+}
+
+
+/***************************************************************************
+
+ Callbacks for the K051960
+
+***************************************************************************/
+
+static void sprite_callback(int *code,int *color,int *priority,int *shadow)
+{
+ /* bit 4 = priority over zoom (0 = have priority) */
+ /* bit 5 = priority over B (1 = have priority) */
+ *priority = (*color & 0x30) >> 4;
+ *color = sprite_colorbase + (*color & 0x0f);
+}
+
+
+/***************************************************************************
+
+ Callbacks for the K051316
+
+***************************************************************************/
+
+static void zoom_callback(int *code,int *color,int *flags)
+{
+ *flags = (*color & 0x40) ? TILE_FLIPX : 0;
+ *code |= ((*color & 0x03) << 8);
+ *color = zoom_colorbase + ((*color & 0x3c) >> 2);
+}
+
+
+/***************************************************************************
+
+ Start the video hardware emulation.
+
+***************************************************************************/
+
+VIDEO_START( bottom9 )
+{
+ layer_colorbase[0] = 0; /* not used */
+ layer_colorbase[1] = 0;
+ layer_colorbase[2] = 16;
+ sprite_colorbase = 32;
+ zoom_colorbase = 48;
+ K052109_vh_start(machine,REGION_GFX1,NORMAL_PLANE_ORDER,tile_callback);
+ K051960_vh_start(machine,REGION_GFX2,NORMAL_PLANE_ORDER,sprite_callback);
+ K051316_vh_start_0(machine,REGION_GFX3,4,FALSE,0,zoom_callback);
+}
+
+
+
+/***************************************************************************
+
+ Display refresh
+
+***************************************************************************/
+
+VIDEO_UPDATE( bottom9 )
+{
+ K052109_tilemap_update();
+
+ /* note: FIX layer is not used */
+ fillbitmap(bitmap,machine->pens[layer_colorbase[1]],cliprect);
+// if (bottom9_video_enable)
+ {
+ K051960_sprites_draw(bitmap,cliprect,1,1);
+ K051316_zoom_draw_0(bitmap,cliprect,0,0);
+ K051960_sprites_draw(bitmap,cliprect,0,0);
+ tilemap_draw(bitmap,cliprect,K052109_tilemap[2],0,0);
+ /* note that priority 3 is opposite to the basic layer priority! */
+ /* (it IS used, but hopefully has no effect) */
+ K051960_sprites_draw(bitmap,cliprect,2,3);
+ tilemap_draw(bitmap,cliprect,K052109_tilemap[1],0,0);
+ }
+ return 0;
+}