diff --git a/src/GPU2D.cpp b/src/GPU2D.cpp
index e0da772b..3375d452 100644
--- a/src/GPU2D.cpp
+++ b/src/GPU2D.cpp
@@ -246,6 +246,11 @@ u8 GPU2D::Read8(u32 addr)
     case 0x049: return WinCnt[1];
     case 0x04A: return WinCnt[2];
     case 0x04B: return WinCnt[3];
+
+    // there are games accidentally trying to read those
+    // those are write-only
+    case 0x04C:
+    case 0x04D: return 0;
     }
 
     printf("unknown GPU read8 %08X\n", addr);
diff --git a/src/NDS.cpp b/src/NDS.cpp
index 37053a42..6272f881 100644
--- a/src/NDS.cpp
+++ b/src/NDS.cpp
@@ -69,7 +69,7 @@ u64 FrameStartTimestamp;
 
 int CurCPU;
 
-const s32 kMaxIterationCycles = 16;
+const s32 kMaxIterationCycles = 64;
 
 u32 ARM9ClockShift;