IO Boards Comparison, Featuring Hitachi LCDs Now that we have 2 differing IO boards, why not put them in a side by side comparison. I figure...

  ZXIO V2 Card with LED Expansion Board Previously I built a simple Input / Output board for the ZX81, tested it, identified some self induc...

Testing ZXIO Boards with a Variety of ZX81 and Minstrel Hardware Options We're finally at the point where I go over the actual test ZXIO...

While designing or reverse engineering external interfaces for the ZX81 it's usually advantageous to have some quick reference materials...

  Last post I mentioned that the ZXIO add-on is memory mapped to location 16507. So this time I go over why 16507 and dig into Memory Mappin...

Testing a Prototype ZXIO interface This is the first in a new series of articles where I explore building an Input / Output board for the ZX...

For a game that started out as type-in program for Paleotronic Magazine , Tut-Tut has received a load of love. I'm constantly surprised ...

  The New Tynemouth & TFW8b.com Mini PET Back in 2020 Tynemouth Software released the Mini PET onto a largely unsuspecting retro compute...