I have started analyzing the circuitry of a SORD M68 keyboard that has been left untouched for many years. Although I haven't fully uncovered the entire circuit yet, I've been able to understand the basics of its operation. It seems that the M68 keyboard uses a key scanning method typical of 1980s PCs, converting the key matrix press information (parallel) into an 8-bit serial format and sending it to the M68. I will further investigate the specific signal details using a logic analyzer. Since it doesn't use a special transfer method, I believe it's possible to create an adapter to convert it to PS/2 or USB.
