The 1227747 will always have knock counts in every cell and when it does the ESC knock test a couple cells will increase, it's an accumulater. It is not a great knock sensor circut and system like 8192 Baud systems. But I have just found a way to hack bin to output knock retard in ALDL output which when implemented would see exactly how much is being retarded in what cell and make a way better history table.

For now you look for cells that increase, if it is bouncing around in cells and all are 40 then all is OK, if 40 starts going up then that is where knock is being found.