One embodiment of the invention is directed to managing access of a host computer to a network. The antennas are coupled to a configurable matrix comprising a plurality of amplifiers, one or more switches that selectively couple the amplifiers in series fashion, and one or more analog-to-digital converters that convert the output signals generated by the amplifiers to digital form. The sense amplifier for determining the voltages on ROM bit lines may be a digital inverter, address decoding may be simplified since there are no timing requirements with respect to transistor pre-charge, and chips containing a plurality of ROM bit cell may be readily programmed. The platen has radial key passages to allow longitudinal movement of the keys in the slots. The interlayer sheet is assembled between the glass substrates.