diff --git a/Components/6526/Implementation/6526Storage.hpp b/Components/6526/Implementation/6526Storage.hpp
index d8c8956b8..6d4e79ab0 100644
--- a/Components/6526/Implementation/6526Storage.hpp
+++ b/Components/6526/Implementation/6526Storage.hpp
@@ -206,6 +206,10 @@ struct MOS6526Storage {
 
 		template <bool is_counter_2> void set_control(uint8_t v) {
 			control = v;
+
+			if(v&2) {
+				printf("UNIMPLEMENTED: PB strobe\n");
+			}
 		}
 
 		template <bool is_counter_2> bool advance(bool chained_input, bool cnt_state, bool cnt_edge) {