Casio BN-20 ROM dump is in progress. 52 jumper wires is a mess. We seem to have a couple of address bits flipped, because the data looks ALMOST right but not quite, with every 16 bytes out of order.
Our programmer/flasher tool only has 40 pins, so we're dumping upper/lower byte separately.










or I guess it could be a dedicated app/feature for calculating the time between dates, maybe there are people who find that super useful in their day to day? Old tech is weird.. :P