The Logical Design of a Simple General Purpose Computer

The logical design described here is used in MINAC, partially constructed at the California Institute of Technology, and LGP-30, manufactured by Librascope Inc. These serial binary digital computers make use of magnetic drum bulk storage and use three circulating registers and fifteen flip-flops. The procedures used in performing the sixteen elementary operations are described. These descriptions indicate the circumstances in which each flip-flop or circulating register input is activated. The Boolean algebraic equations summarizing these circumstances constitute the logical design.