Changes

The main component on the PCB is the Flash Memory. This must be a W29C040-90 (ie: the Winbond version) to be fully compatible with TFMs [[ROManager|ROManager SoftwareMegaFlashROManager]] The five other ICs are standard TTL Logic devices and only need to be of the type 74LSxx (74HCxx, 74Fxx etc will also work but are not necessary in this application). The finished PCB is approx. 70mm x 55mm.