you’d have found when you bought a mouse with a PS/2 connector fitted, it may well have come with an adapter for a 9-pin RS232 serial port. Those mice from a decade or more ago would have ...

mouse and other peripherals. Old Macs used the serial port for printers. Also known as an RS-232 port, serial ports provide very slow speeds and have been superseded by USB on desktop computers.

you’d have found when you bought a mouse with a PS/2 connector fitted, it may well have come with an adapter for a 9-pin RS232 serial port. Those mice from a decade or more ago would have ...

In the 1980s, most mice used a serial connection; however, a bus mouse was occasionally used to free up a serial port for another peripheral. The bus mouse connector looked like a PS/2 connector ...