From 7c17cd2e4743648086b6c480f0734f1d2c57320d Mon Sep 17 00:00:00 2001
From: Sandro Ronco <sronco@users.noreply.github.com>
Date: Wed, 2 Jan 2013 12:25:12 +0000
Subject: [PATCH] (MESS) uzebox: small change for games that only works on
 early revisions. (nw)

---
 hash/uzebox.xml           | 13 +++++++++----
 src/mess/drivers/uzebox.c |  3 ++-
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/hash/uzebox.xml b/hash/uzebox.xml
index 5f877e9c36c..31a83341014 100644
--- a/hash/uzebox.xml
+++ b/hash/uzebox.xml
@@ -110,7 +110,8 @@
 		</part>
 	</software>
 
-	<software name="claydemo" supported="no">
+	<software name="claydemo">
+		<!-- this demo is compatible with Uzebox revisions C1, D1 and E1 -->
 		<description>Clay Demo</description>
 		<year>2008</year>
 		<publisher>Belogic</publisher>
@@ -543,7 +544,8 @@
 		</part>
 	</software>
 
-	<software name="snakes" supported="no">
+	<software name="snakes">
+		<!-- this game is compatible with Uzebox revisions C1, D1 and E1 -->
 		<description>Snakes</description>
 		<year>2008</year>
 		<publisher>Belogic</publisher>
@@ -905,7 +907,8 @@
 		</part>
 	</software>
 
-	<software name="scrolld" supported="no">
+	<software name="scrolld">
+		<!-- this demo is compatible with Uzebox revisions C1, D1 and E1 -->
 		<description>Clay's Scroll Demo</description>
 		<year>2010</year>
 		<publisher>Belogic</publisher>
@@ -950,7 +953,8 @@
 		</part>
 	</software>
 
-	<software name="sprited1" supported="no">
+	<software name="sprited1">
+		<!-- this demo is compatible with Uzebox revisions C1, D1 and E1 -->
 		<description>Sprite Demo 1</description>
 		<year>2010</year>
 		<publisher>Belogic</publisher>
@@ -1084,6 +1088,7 @@
 	</software>
 
 	<software name="vectord2" supported="no">
+		<!-- this demo assumes that the RAM is mirrored at 0x1100-0x20ff and probably doesn't works on real HW -->
 		<description>Vector Demo 2</description>
 		<year>2009</year>
 		<publisher>Belogic</publisher>
diff --git a/src/mess/drivers/uzebox.c b/src/mess/drivers/uzebox.c
index 36f7bdba750..acb13f3baf4 100644
--- a/src/mess/drivers/uzebox.c
+++ b/src/mess/drivers/uzebox.c
@@ -119,7 +119,8 @@ WRITE8_MEMBER(uzebox_state::port_b_w)
 	//  ---- -xx-   NC
 	//  ---- ---x   AD725 HSYNC
 
-	if (m_port_b & 0x10)
+	// AD725 CE is hard-wired to VCC in early revisions (C1, D1 and E1)
+	//if (m_port_b & 0x10)
 		if ((m_port_b ^ data) & m_port_b & 0x01)
 		{
 			line_update();