Computarium: a repaired bubble jet BJ300 (1991).

A vintage BJ300 dot matrix printer from Canon runs its self-test, with its case opened to show some mechanical details. The BJ300 were excellent, virtually indestructible printers which were especially handy to print large banners on fan-fold paper (using the famous Bannermania software from Broederbund). Thees machines will be used to print screen dumps from Logo screens (BBC Master computers).