Taito's ROTI attempted fix (#199)

amadvance · Feb 12, 2025 · 0d82405 · 0d82405
1 parent a2abaa9
commit 0d82405
Showing 1 changed file with 20 additions and 4 deletions.
diff --git a/src/vidhrdw/retofinv.c b/src/vidhrdw/retofinv.c
@@ -141,16 +141,32 @@ VIDEO_START( retofinv )
 
 ***************************************************************************/
 
+READ8_HANDLER( retofinv_bg_videoram_r )
+{
+	return retofinv_bg_videoram[offset];
+}
+
+READ8_HANDLER( retofinv_fg_videoram_r )
+{
+	return retofinv_fg_videoram[offset];
+}
+
 WRITE8_HANDLER( retofinv_bg_videoram_w )
 {
-	retofinv_bg_videoram[offset] = data;
-	tilemap_mark_tile_dirty(bg_tilemap,offset & 0x3ff);
+	if (retofinv_bg_videoram[offset] != data)
+	{
+		retofinv_bg_videoram[offset] = data;
+		tilemap_mark_tile_dirty(bg_tilemap,offset & 0x3ff);
+	}
 }
 
 WRITE8_HANDLER( retofinv_fg_videoram_w )
 {
-	retofinv_fg_videoram[offset] = data;
-	tilemap_mark_tile_dirty(fg_tilemap,offset & 0x3ff);
+	if (retofinv_fg_videoram[offset] != data)
+	{
+		retofinv_fg_videoram[offset] = data;
+		tilemap_mark_tile_dirty(fg_tilemap,offset & 0x3ff);
+	}
 }
 
 WRITE8_HANDLER( retofinv_gfx_ctrl_w )