I uploaded info on Castle Toy Co Einstein and Mattel Funtronics Red Light Green Light. Both use Nat Semi COP MCUs; RLGL has a COP410L die bonded directly to the PCB, and Einstein has a COP421 (not L). I had to lower the voltage on SI to 1.5v to get the COP421 to go into ROM dump mode. I dumped RLGL both visually and electronically. There's one bit under some dirt, but it's difficult to clean because I don't want to damage the bond wires. I did wind up breaking the bond wire to the green LED; I've been careful with the board, but something must have touched it. Maybe it happened when I removed the plastic that covers the LEDs.

There are a couple of crappy videos of Einstein to help with the timing:

Last edited by seanriddle; 05/18/15 07:36 PM.