Welcome to the HJS22 website

The HJS22 (aka as HJS21) is a homebrew 8 bit TTL computer built in 1976/77 as an hobby project.  
This website gives an overview of it's history, hardware, micro-code and software.

HJS22 CPU as displayed at the VCF-E  2.0

History of the HJS22

HJS22 Specifications

HJS22 Hardware

HJS22 Architecture

HJS22 Micro code

HJS22 Monitor program