From c24065c42acdc589aeaf49d769b54ced8dfdeaeb Mon Sep 17 00:00:00 2001
From: Ville Linde <villelin@mamedev.org>
Date: Sun, 3 Feb 2013 15:42:56 +0000
Subject: [PATCH] k001604: Found ROZ layer enable. (nw)

---
 src/mame/video/konicdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mame/video/konicdev.c b/src/mame/video/konicdev.c
index d822b75c5b6..26f5a30e86f 100644
--- a/src/mame/video/konicdev.c
+++ b/src/mame/video/konicdev.c
@@ -10303,6 +10303,9 @@ void k001604_draw_back_layer( device_t *device, bitmap_rgb32 &bitmap, const rect
 
 	num_layers = k001604->layer_size ? 2 : 1;
 
+	if ((k001604->reg[0x60 / 4] & 0x40000000) == 0)
+		return;
+
 	for (layer = 0; layer < num_layers; layer++)
 	{
 		int reg = 0x08;