From 4aac86588a75e55c8fb8559af99da17f3c890442 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Wed, 20 Sep 2017 22:32:35 +0300
Subject: [PATCH] m68k: fix another nbcd mistake

Verified on 68000 with an updated bcd-verifier:
https://github.com/flamewing/68k-bcd-verifier/pull/1
Megadrive ROM:
http://notaz.gp2x.de/md/rel/bcd-verifier-u1.zip
---
 src/devices/cpu/m68000/m68k_in.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/devices/cpu/m68000/m68k_in.cpp b/src/devices/cpu/m68000/m68k_in.cpp
index 6c56274a60a..3b557865db9 100644
--- a/src/devices/cpu/m68000/m68k_in.cpp
+++ b/src/devices/cpu/m68000/m68k_in.cpp
@@ -7610,7 +7610,7 @@ M68KMAKE_OP(mull, 32, ., .)
 M68KMAKE_OP(nbcd, 8, ., d)
 {
 	uint32_t* r_dst = &DY(mc68kcpu);
-	uint32_t dst = *r_dst;
+	uint32_t dst = MASK_OUT_ABOVE_8(*r_dst);
 	uint32_t res = -dst - XFLAG_1(mc68kcpu);
 
 	if(res != 0)