ZX81-coder, 1K hires games (That's is Hires games in 1K screen included)
This user joined on 12/27/2016.
First and only marblecomputer that, unlike Digicomp-II, can multiply with shift add method and not repeating additions.
Marble computer that can add up to 63. Added a BCD-interface (with full-adders) to display correct number.
speed load from PC to ZX Spectrum over parallelport