From bbeddce0b4b9fe02a3e9376787cf1b283e29f480 Mon Sep 17 00:00:00 2001
From: mamehaze <mamehaze@users.noreply.github.com>
Date: Mon, 9 Mar 2015 00:37:34 +0000
Subject: [PATCH] don't crash on garbage values roadedge / samsh64 write on
 startup (nw)

---
 src/emu/cpu/nec/v53.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/emu/cpu/nec/v53.c b/src/emu/cpu/nec/v53.c
index 063eb3741a9..8831c99d4c6 100644
--- a/src/emu/cpu/nec/v53.c
+++ b/src/emu/cpu/nec/v53.c
@@ -202,6 +202,7 @@ void v53_base_device::install_peripheral_io()
 	if (m_OPSEL & 0x01) // DMA Unit available
 	{
 		UINT16 base = (m_OPHA << 8) | m_DULA;
+		base &= 0xfffe;
 
 		if (m_SCTL & 0x02) // uPD71037 mode
 		{
@@ -222,6 +223,7 @@ void v53_base_device::install_peripheral_io()
 	if (m_OPSEL & 0x02) // Interupt Control Unit available
 	{
 		UINT16 base = (m_OPHA << 8) | m_IULA;
+		base &= 0xfffe;
 
 		if (IOAG) // 8-bit 
 		{
@@ -239,6 +241,7 @@ void v53_base_device::install_peripheral_io()
 	{
 		UINT16 base = (m_OPHA << 8) | m_TULA;
 		//printf("installing TCU to %04x\n", base);
+		base &= 0xfffe;
 
 		if (IOAG) // 8-bit 
 		{
@@ -256,6 +259,8 @@ void v53_base_device::install_peripheral_io()
 	if (m_OPSEL & 0x08) // Serial Control Unit available
 	{
 		UINT16 base = (m_OPHA << 8) | m_SULA;
+		base &= 0xfffe;
+
 		if (IOAG) // 8-bit 
 		{