From 13a77ea3fff2da06b208c5f42016e171ac3dc53a Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Fri, 3 Apr 2015 23:51:36 -0700
Subject: [PATCH] GBA: Fix timers not updating timing when writing to only the
 reload register

---
 CHANGES       | 4 ++++
 src/gba/gba.c | 1 +
 2 files changed, 5 insertions(+)

diff --git a/CHANGES b/CHANGES
index 9ac3b743e..e5f7882c6 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+0.3.0: (Future)
+Bugfixes:
+ - GBA: Fix timers not updating timing when writing to only the reload register
+
 0.2.0: (2015-04-03)
 Features:
  - Support for gamepad axes, e.g. analog sticks or triggers
diff --git a/src/gba/gba.c b/src/gba/gba.c
index e0cac779d..fbf38f06a 100644
--- a/src/gba/gba.c
+++ b/src/gba/gba.c
@@ -434,6 +434,7 @@ void GBATimerUpdateRegister(struct GBA* gba, int timer) {
 
 void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
 	gba->timers[timer].reload = reload;
+	gba->timers[timer].overflowInterval = (0x10000 - gba->timers[timer].reload) << gba->timers[timer].prescaleBits;
 }
 
 void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {