Elektuur/Elektor and the Junior Computer and other 6502 based machines.
The Junior computer design was published by Elektuur/Elektor from 1980 on. It was published in a series of magazine articles, four books and several socalled paperware A4 booklets. Loys Nachtmann designed and developed the the Junior Computer. G.H. Nachbar did the Dutch translation of the German books. The 4 Junior books were translated into English, German, Spanish, Italian and French as well.
The Junior design is in fact heavily inspired by the hardware of the KIM-1 (or call it a clone ..), the floppy interface design is based on the Ohio Scientific OS65D design. It was delivered as a kit or could be be built from only the PCB’s sold by Elektuur. Many hobbyist have built one. Later extended with an adapted version of the 8K KB9 Basic and even a disk operating system (Ohio Scientific DOS OS65D).
Many articles in the Elektuur magazine and books (1-4), a 6522 book in the same series, in Dutch, English, French and German have been published.
Quickly adopted by the dutch KIM Gebruikers Club because it was so close to the KIM-1. In the later days the number of Junior Computer users exceeded the KIM-1 users and changed the nature of the club from professional users to a hobby club. It also led to the DOS65 operating system for the Elektuur 6502 CPU board
The magazine Elektuur (the dutch name) and Elektor (the name in many european countries) surprised us in 1980 with the publication of a build-yourself 6502-based SBC. It is a design in the tradition of the KIM-1 and SYM-1: a hexadecimal keyboard, six hexadecimal led displays and KIM-1 compatible tape format.
Many Junior Computers were built, either from the PCB made by Elektuur and separate components or as a complete kit. And after we (Anton Muller and me) sent a letter to the Elektuur magazine that got published about the KIM Gebruikers Club, many hundreds Junior users joined the club.
The developments after the Junior design in Elektuur led to the EC65(K) (see the Elektor Computing books) and the KIM Club DOS65, documented on this page.
– Junior hardware circuit diagrams, PCBs etc
– Junior and related 6502 photos
– Elektor and Elektuur and KIM Kenner articles on the Junior,
6502 and other related articles, 1978 – 1985, in Dutch, English, German, French
– Junior books 1 -4 and paperware Dutch, English, French, Italian, German
– Junior and EC65 software, Monitor ROMS also in assembler source format
– Retronics articles about the Junior