From 23d09f8ef8902e679f209a245f54c0352ea09b29 Mon Sep 17 00:00:00 2001
From: hap <happppp@users.noreply.github.com>
Date: Fri, 1 May 2015 18:58:06 +0200
Subject: [PATCH] fix LBI mask

---
 src/emu/cpu/cop400/cop400op.inc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/emu/cpu/cop400/cop400op.inc b/src/emu/cpu/cop400/cop400op.inc
index 3be875f6fa7..03bb92cce65 100644
--- a/src/emu/cpu/cop400/cop400op.inc
+++ b/src/emu/cpu/cop400/cop400op.inc
@@ -915,11 +915,11 @@ INSTRUCTION( lbi )
 {
 	if (opcode & 0x80)
 	{
-		B = opcode & 0x3f;
+		B = opcode & 0x7f;
 	}
 	else
 	{
-		B = (opcode & 0x70) | (((opcode & 0x0f) + 1) & 0x0f);
+		B = (opcode & 0x30) | (((opcode & 0x0f) + 1) & 0x0f);
 	}
 
 	m_skip_lbi = 1;