Thanks for double checking. Yes, that thing will oscillate the CPU pin (the same pin that is directly connected to the level switch on Mini Chess)

*edit* the mysterious increased max calculation time from 15 to 20s mentioned in the manual, most likely a correction after they found out that occasionally it can take up to 20s.
If not, then it means CP3000/4000 CPU speed is slower than Mini Chess, but that is unlikely.

Yes, I expect Travel Sensor, Travel Mate, CP5000/6000 to be the same Mark Taylor chess engine.