diff --git a/src/ARM.cpp b/src/ARM.cpp
index dd0be6af..50ef8fd5 100644
--- a/src/ARM.cpp
+++ b/src/ARM.cpp
@@ -124,7 +124,6 @@ void ARMv5::Reset()
         GetMemRegion = NDS::ARM9GetMemRegion;
     }
 
-    CP15Reset();
     ARM::Reset();
 }
 
diff --git a/src/CP15.cpp b/src/CP15.cpp
index 5b5f935a..77244f24 100644
--- a/src/CP15.cpp
+++ b/src/CP15.cpp
@@ -258,9 +258,11 @@ void ARMv5::UpdatePURegions(bool update_all)
 
 void ARMv5::UpdateRegionTimings(u32 addrstart, u32 addrend)
 {
+    printf("initialising region timings %x %x\n", addrstart, addrend);
     addrstart >>= 12;
     addrend   >>= 12;
 
+
     if (addrend == 0xFFFFF) addrend++;
 
     for (u32 i = addrstart; i < addrend; i++)
diff --git a/src/NDS.cpp b/src/NDS.cpp
index 3de9c1fa..0bde139c 100644
--- a/src/NDS.cpp
+++ b/src/NDS.cpp
@@ -501,6 +501,10 @@ void Reset()
         ARM9ClockShift = 1;
         MainRAMMask = 0x3FFFFF;
     }
+    // has to be called before InitTimings
+    // otherwise some PU settings are completely
+    // unitialised on the first run
+    ARM9->CP15Reset();
 
     ARM9Timestamp = 0; ARM9Target = 0;
     ARM7Timestamp = 0; ARM7Target = 0;