InterQuadram Ltd of Slough, Berkshire has announced that its QuadPort AT expansion slot is now supported by Santa Cruz Xenix and recommended by Compaq for its Xenix-based machines: QuadPort AT is a half card input-output board that has one serial and one parallel port as standard with an upgrade option for four serial ports, the one serial port option costs UKP153 and the version with five is UKP382.