Your mouse once understood two protocols. What's your excuse? Before Bluetooth and USB, computers had PS/2 ports. Microsoft ...
It’s not too much of a chore to find a keyboard that’ll talk to a PC-AT, but the PC-XT had an entirely different protocol, not to mention that chunky 5-pin DIN connector. As with many things ...
The 5-pin DIN keyboard connector used with the first IBM PC (1981) and second-generation IBM AT (1984). It was subsequently replaced with the smaller 6-pin Mini-DIN connector on the IBM PS/2 in 1987.
Mice required a PS/2 connector or a serial port. The situation for the keyboard was not too different. For fans of certain fruit-tech brand, the Apple Desktop Bus or DIN connector did the job.
See DIN and DIN connector. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.