diff --git a/src/xenia/gpu/graphics_system.cc b/src/xenia/gpu/graphics_system.cc
index 45ef056fd..5f0df17d9 100644
--- a/src/xenia/gpu/graphics_system.cc
+++ b/src/xenia/gpu/graphics_system.cc
@@ -143,8 +143,12 @@ uint64_t GraphicsSystem::ReadRegister(uint32_t addr) {
   RegisterFile* regs = driver_->register_file();
 
   switch (r) {
+  case 0x6530: // ????
+    return 1;
   case 0x6544: // ? vblank pending?
     return 1;
+  case 0x6584: // ????
+    return 1;
   }
 
   XEASSERT(r >= 0 && r < kXEGpuRegisterCount);