Digital Board

Not much change from the original. The first board I designed; tried to keep the component distribution more or less the same as the original. Had to guess the size of the original board by measuring the drawing using the pins in the CPU as a “ruler”… In this redesign, all ICs now have decoupling capacitors, all assembled close to the supply traces, and a ground plane is added. Power connector is a Molex Microfit, and all IDCs were changed from the DIP format used in the original for what I believe is a more reliable option, similar to the IDE connectors found in older PCs. Using 27C32 EPROMS now (slight different pinout from the hard to find 2532 in the original). The 27C32 uses way less power, 26mW (compared to the 550mW in the original 2532).