Abstract A substantial portion of the typical digital computer is concerned with the transfer of data between the central processor and a variety of peripheral equipment. The intent of this project is to design and build the circuitry required for a particular interface, that is, between a Honeywell DDP-24 central processor and an Uptime punch card. A design for this combination is not known to exist and would be of value. This project concerns a specific computer and a specific peripheral...

Abstract A batch operating system is converted to a Foreground/Background Operating System (FBOS) for use on a Varian 620/f Minicomputer system. Entry to port #1 (the foreground) is via an interrupt generating graphics console facilitating user interaction with computer applications software packages. Port #2 (the background) is the entry to the batch operating system. Although the system which is developed supports a specific graphics console (Information Displays Inc. - Idiom 1.2) and a...

Abstract This work will pursue the study of an electronic analog multiplier such as those commonly employed in analog computers. This particular multiplier uses the well known logarithmic characteristic of PN junctions together with the highly popular operational amplifier. The multiplier being considered employs a somewhat unique approach to obtain four quadrant operation and various correction means to improve multiplier accuracy. The multiplier, as now envisioned, uses four logarithmic...