IIRC the Junior Computer was 6502 based. They did
publish an SC/MP
machines as well, and the 'video game comuter' which was 2650-based. More
recently (like this year :-)) they've published various microcontroller
boards.
I build the junior and it is definitly 6502 based.
In 1974 the dutch version of elector "Elektuur" published a complete machine
based on TTL . It had a choice of "cheap" memory consisting of CCD
shiftregisters (-> no random access...) , and expensive memory consisting of
2102's. I very much regret that I do not have these articles anymore., altough
they were not up to the normal Elektor standard.
Jos Dreesen