APOLLO181 is a homemade didactic 4-bit CPU   made exclusively of TTL logics and bipolar memories

APOLLO181: homemade 100% pure TTL processor made of distinct integrated circuits

View of APOLLO181: on the top right the 74181 arithmetic and logic unit

APOLLO181 is a homemade didactic 4-bit CPU   made exclusively of TTL logics and bipolar memories
 Join the ring? David Brooks, designer of the Simplex-III homebrew computer, has founded the Homebuilt CPUs Web Ring. To join, drop Dave a line, mentioning your page's URL.
 
 Note: The ring is chartered for projects that include a home-built CPU. It can emulate a commercial part, that′s OK. But actually using that commercial CPU doesn′t rate. Likewise, the project must have been at least partially built: pure paper designs don′t rate either. It can be built using any technology you like, from relays to FPGAs. 
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