diff --git a/src/core/services/gsp_gpu.cpp b/src/core/services/gsp_gpu.cpp
index 684b3c4f..93230119 100644
--- a/src/core/services/gsp_gpu.cpp
+++ b/src/core/services/gsp_gpu.cpp
@@ -103,7 +103,8 @@ void GPUService::requestInterrupt(GPUInterrupt type) {
 	u8 flagIndex = (index + interruptCount) % 0x34;
 	interruptCount++;
 	
-	sharedMem[0xC + flagIndex] = static_cast<u8>(type);
+	sharedMem[2] = 0; // Set error code to 0
+	sharedMem[0xC + flagIndex] = static_cast<u8>(type); // Write interrupt type to queue
 }
 
 void GPUService::writeHwRegs(u32 messagePointer) {
@@ -271,10 +272,12 @@ void GPUService::memoryFill(u32* cmd) {
 
 	if (start0 != 0) {
 		gpu.clearBuffer(start0, end0, value0, control0);
+		requestInterrupt(GPUInterrupt::PSC0);
 	}
 
 	if (start1 != 0) {
 		gpu.clearBuffer(start1, end1, value1, control1);
+		requestInterrupt(GPUInterrupt::PSC1);
 	}
 }
 
diff --git a/tests/SimplerTri/source/main.c b/tests/SimplerTri/source/main.c
index 63a19af0..b06ebc76 100644
--- a/tests/SimplerTri/source/main.c
+++ b/tests/SimplerTri/source/main.c
@@ -111,11 +111,17 @@ int main()
 	while (true)
 	{
 		// Render the scene
+        emuPrint("Entering C3D_FrameBegin");
 		C3D_FrameBegin(C3D_FRAME_SYNCDRAW);
+            emuPrint("Clearing render target");
 			C3D_RenderTargetClear(target, C3D_CLEAR_ALL, CLEAR_COLOR, 0);
+            emuPrint("Calling C3D_FrameDrawOn");
 			C3D_FrameDrawOn(target);
+            emuPrint("Calling sceneRender");
 			sceneRender();
+            emuPrint("Entering C3D_FrameEnd");
 		C3D_FrameEnd(0);
+        emuPrint("Exited C3D_FrameEnd");
 	}
 
 	// Deinitialize the scene