Programmed word length computer

Abstract

The concept of a programmable word length computer has evolved through an attempt to minimize wasted storage in any fixed word length computer. Whether the computer contains six bits per word or 72 bits per word, storage is inevitably wasted when it is necessary to use a full word for a simple on-off switch, or to have 12-digit capacity used for 2-digit significance. Programmers have long recognized this. Thus, word packing and unpacking soon becomes a part of every programmer's repertoire. The first section of this treatise is primarily concerned with data storage, instruction format, storage and register organization, arithmetic operations, input/output processes, and some special considerations. The second section is concerned with software support, and operational recommendations.