Diagnostic Programs for the Illiac

The diagnostic programs used for maintenance of the ILLIAC, the University of Illinois\´ digital computer, are described. The uses of diagnostic programs for fault detection, fault isolation, and periodic computer servicing are discussed. The characteristics of the "leapfrog" program, both as a detection program and as an isolation program, are described in detail. Descriptions of one of the more complex isolation programs and of a typical servicing program are given. Pertinent characteristics of the ILLIAC and techniques of fault isolation are also included.