Qontrol II Board
The Qontrol II Board was an interface designed by Colin Opie to go with the Connexions series of articles in QL World magazine in 1987 and was sold by Care Electronics.
The interface plugged into the QL expansion slot and had its own set of extensions in a ROM on board.
The board has a Versatile Interface Adapter (VIA) chip which supports up to 16 configurable data lines, four multipurpose control lines, shift register facilities and two 16 bit timers. Up to eight high speed analogue input channels, each channel having an individual sample rate of more thna 1500 samples per second.