Abstract: This invention relates to methods of self-calibration for computer display cursor positioning devices imbedded within a computer keyboard key (sometimes referred to herein as a "key-type mouse") or other pointing device. A plurality of Force Sensitive Resistor grids ("FSRs") or other pressure sensitive sensors are used to detect relative pressure applied in various directions to a predetermined key of a computer keyboard. An RC circuit is used to indirectly read the values of the FSRs. A predetermined delay period is associated with each sensor followed by a measurement period. The resistance of the FSR is related to the measurement period taken to reach a given voltage value after the predetermined delay period. A positive or negative offset to the predetermined delay period adjusts the time necessary for the RC circuit to reach a predetermined bias voltage value.

Abstract: Disclosed herein is an array of daisy chained slides for receiving carrier mounted electrical devices for connection with electrical equipment. The daisy chained array includes a bus cable having two ends and a data connector attached at each end. The bus cable is adapted for connection with the electrical equipment. The array also includes a plurality of slides, each slide having a slide data connector. Each data connector is attached to the cable between the ends in a daisy chained fashion. Each of the slides is adapted to receive a carrier compatible for sliding and mating connection with the slide. The carrier includes an electrical device, such as a hard or floppy disk. The carrier has a carrier data connector for mating with the slide data connector. The carrier data connector is attached to one end of a stub cable. The other end of the stub cable is attached to a device data connector for connection with the electrical device.