An electronic color photography apparatus includes a photosensitive body and a plurality of detachable developing devices. In one example, the boot signature checker monitors the bus connecting the processor with the memory and provides a boot signature that is a function of the signal sequence detected on the bus. Any two LUTs in a design can be compared to determine if they implement the same function by rearranging the input signals of one of the LUTs with respect to the input terminals of that LUT. Continued rotation of the shaft causes the kicker head to push the pipe out of the trough.