From f9ebe36faccf4267bde327f3b607a3054ca7f862 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Wed, 1 Oct 2014 23:19:26 -0700
Subject: [PATCH] Fix regression caused by converting DISPSTAT into a bitfield

---
 src/gba/gba-video.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gba/gba-video.c b/src/gba/gba-video.c
index 9d97ebaa9..d2b6e275f 100644
--- a/src/gba/gba-video.c
+++ b/src/gba/gba-video.c
@@ -157,7 +157,8 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
 }
 
 void GBAVideoWriteDISPSTAT(struct GBAVideo* video, uint16_t value) {
-	video->dispstat = value;
+	video->dispstat &= 0x7;
+	video->dispstat |= value & 0xFFF8;
 
 	if (GBARegisterDISPSTATIsVcounterIRQ(video->dispstat)) {
 		// FIXME: this can be too late if we're in the middle of an Hblank