From dbdebb9d0cb7a6b5a1420c434e6a20d60620befb Mon Sep 17 00:00:00 2001
From: Olivier Galibert <galibert@pobox.com>
Date: Thu, 11 Oct 2012 21:51:40 +0000
Subject: [PATCH] (mess) upd765: Fix MSR DIO in EXEC phase [O. Galibert]

---
 src/mess/machine/upd765.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/mess/machine/upd765.c b/src/mess/machine/upd765.c
index 69dc7a501a3..1d53c4cfe03 100644
--- a/src/mess/machine/upd765.c
+++ b/src/mess/machine/upd765.c
@@ -280,8 +280,11 @@ READ8_MEMBER(upd765_family_device::msr_r)
 		msr |= MSR_CB;
 		if(spec & SPEC_ND)
 			msr |= MSR_EXM;
-		if(internal_drq)
+		if(internal_drq) {
 			msr |= MSR_RQM;
+			if(!fifo_write)
+				msr |= MSR_DIO;
+		}
 		break;
 
 	case PHASE_RESULT: