Reverse Engineering Cold War Electronics Project update : Simulating a 40 year old UART IC. We've reverse engineered the PCB and have two schematics for both boards contained within the DTD. There are three models unavailable. We shall be creating our own models within Proteus. First up is the UART. A new old stock device has been purchased so we can compare our model against the actual device operation. On face value the operation is fairly straight forward, serial in, shifted to parallel and h