High speed (460800bps) serial port for the Amiga 1200 with a 16byte FIFO. Connects to the clock port on the A1200. There is a jumper on the card which appears to allow connecting of up to 2 SpeedCOMs or 1 SpeedCOM and 2 PARalizers)

Thanks to Pawel Chwalowski and Artur Gadawski