International Computers Limited

Anthony Maurice Whitby

Brian J Procter

John Martin Harper

A data processing system is described in which a plurality of microprogram address registers are provided, some of the registers being associated with operations involving a processor and others of the registers being associated with peripheral devices. Each register corresponds to a different level of microprogram interrupt and the registers associated with processor operations correspond to levels lower than the levels associated with the peripheral devices.

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Hitchin, United Kingdom

Anthony Maurice Whitby