Abstract: A machine and a control system are provided for generating high registration photomasks with a contact printing arrangement. Further, a unique control arrangement is provided for controlling a machine such as a high registration contact print machine or other type of machine. In a preferred embodiment, a control system generates signals to a step and repeat contact printing machine that exposes many prints of master die images on a photographic film, where these prints have a high registration characteristic. In a further embodiment a unique control arrangement is provided for machine control operations.

Abstract: A system is provided for operator interaction having a computer for enhanced operation. The computer performs switch debounce operations under program control and performs display refresh operations under program control. The computer is a fully integrated circuit computer in a preferred embodiment having an integrated circuit read only memory for storing a program and an integrated circuit scratchpad memory for storing operands.

Abstract: A control system for an electronic data processing system minimizes hardwiring and specialized components and circuits and provides bidirectional communication between a data processor within the data processing system and an operator via intermediary binary digital input and output words. A separate aspect is the provision of a master control panel configuration including means for receiving input and output elements having generalized identities, in conjunction with encoder and decoder means interposed in the circuitry and reducing the interconnections between the panel and the data processing system. The control system converts the status of selector switches and momentary switches to signals representing an intermediary input word. The data processor processs and interprets the signals representing the input word and generates appropriate system responses.

Abstract: A digital signal processor is provided for processing analog signals with digital circuits. In a preferred embodiment, a servo feedback signal is processed with a digital arrangement to derive servo velocity information. Processing is performed by synchronizing a counter with a servo feedback signal and comparing the period of the feedback signal with a reference signal from the counter as being indicative of servo velocity.