diff --git a/OSBindings/Mac/Clock SignalTests/MOS6532Bridge.mm b/OSBindings/Mac/Clock SignalTests/MOS6532Bridge.mm
index 884f199f2..12ced175b 100644
--- a/OSBindings/Mac/Clock SignalTests/MOS6532Bridge.mm	
+++ b/OSBindings/Mac/Clock SignalTests/MOS6532Bridge.mm	
@@ -10,6 +10,12 @@
 #include "6532.hpp"
 
 class VanillaRIOT: public MOS::MOS6532<VanillaRIOT> {
+	public:
+		uint8_t get_port_input(int port)
+		{
+			return input[port];
+		}
+		uint8_t input[2];
 };
 
 @implementation MOS6532Bridge
@@ -37,4 +43,14 @@ class VanillaRIOT: public MOS::MOS6532<VanillaRIOT> {
 	return _riot.get_inerrupt_line();
 }
 
+- (void)setPortAInput:(uint8_t)portAInput
+{
+	_riot.input[0] = _portAInput = portAInput;
+}
+
+- (void)setPortBInput:(uint8_t)portBInput
+{
+	_riot.input[1] = _portBInput = portBInput;
+}
+
 @end