December 2014

PIC18: Connecting to a PS/2 keyboard

ps2 pic With the advent of the USB protocol in the 90's many peripherals' manufacturers abandoned the previous protocols and connections to adopt it as a unifying standard; in the past printers mostly used parallel/Centronics ports, modems were serials, scanners could use SCSI interfaces, which often required a daughter board to be placed inside the cabinet of PC's, and mice and keyboards had to be connected to PS/2 ports.