A RS232 TTL adapter for Vintage FX Casio Calculators and other devices
Background Back in the ’80s, Casio produced a line of calculators that was sold and advertised as “pocket personal computers”. This branding started with the PB-100 I believe, but the device concept started with a previous model, the FX-702P, produced in 1981. While by today standards that claim seems a bit of an stretch, it held quite a bit of ground back […]