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Diffstat (limited to 'src/mame/video/segas16b.c')
-rw-r--r--src/mame/video/segas16b.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/src/mame/video/segas16b.c b/src/mame/video/segas16b.c
new file mode 100644
index 00000000000..a8a0fe484ba
--- /dev/null
+++ b/src/mame/video/segas16b.c
@@ -0,0 +1,82 @@
+/***************************************************************************
+
+ Sega System 16B hardware
+
+***************************************************************************/
+
+#include "driver.h"
+#include "segaic16.h"
+#include "includes/system16.h"
+
+
+
+/*************************************
+ *
+ * Video startup
+ *
+ *************************************/
+
+static void video_start_common(int type)
+{
+ /* compute palette info */
+ segaic16_palette_init(0x800);
+
+ /* initialize the tile/text layers */
+ segaic16_tilemap_init(0, type, 0x000, 0, 2);
+
+ /* initialize the sprites */
+ segaic16_sprites_init(0, SEGAIC16_SPRITES_16B, 0x400, 0);
+}
+
+
+VIDEO_START( system16b )
+{
+ video_start_common(SEGAIC16_TILEMAP_16B);
+}
+
+
+VIDEO_START( timscanr )
+{
+ video_start_common(SEGAIC16_TILEMAP_16B_ALT);
+}
+
+
+
+/*************************************
+ *
+ * Video update
+ *
+ *************************************/
+
+VIDEO_UPDATE( system16b )
+{
+ /* if no drawing is happening, fill with black and get out */
+ if (!segaic16_display_enable)
+ {
+ fillbitmap(bitmap, get_black_pen(machine), cliprect);
+ return 0;
+ }
+
+ /* reset priorities */
+ fillbitmap(priority_bitmap, 0, cliprect);
+
+ /* draw background opaquely first, not setting any priorities */
+ segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_BACKGROUND, 0 | TILEMAP_DRAW_OPAQUE, 0x00);
+ segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_BACKGROUND, 1 | TILEMAP_DRAW_OPAQUE, 0x00);
+
+ /* draw background again, just to set the priorities on non-transparent pixels */
+ segaic16_tilemap_draw(machine, 0, NULL, cliprect, SEGAIC16_TILEMAP_BACKGROUND, 0, 0x01);
+ segaic16_tilemap_draw(machine, 0, NULL, cliprect, SEGAIC16_TILEMAP_BACKGROUND, 1, 0x02);
+
+ /* draw foreground */
+ segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_FOREGROUND, 0, 0x02);
+ segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_FOREGROUND, 1, 0x04);
+
+ /* text layer */
+ segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_TEXT, 0, 0x04);
+ segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_TEXT, 1, 0x08);
+
+ /* draw the sprites */
+ segaic16_sprites_draw(0, bitmap, cliprect);
+ return 0;
+}