Lego Dacta? Never heard of that until today =)
I googled around a bit to learn about it, interesting educational 'branch' of Lego smile

The one you linked is interface B. Interface A info is over here:

*edit* The interface brick connects to a PC(software control happens there), so I assume the interface only has a serial controller and no CPU on it.

also, pcb pics of the Control Center here

Last edited by hap; 07/24/15 07:41 PM.