2-ICT/ICL 1900 Performance and Competitive Position

(By Virgilio Pasquali- November 2003, expanded from the talk given by the author at the London 1900 Seminar May 1996)


The assessment and measurement of processor performance became increasingly important with the advent of compatible ranges addressing a large and continuous span of the market. During the 10 years of market life of the 1900 Range, the specification and measurement of processor performance, initially expressed in individual instruction times, was increasingly specified by standardised “work loads”, instruction mixes that could be coded and measured on all models in the range and on competing systems (with different order code formats).

The following four sections outline the processor performance of all 1900 systems, and their position (in term of performance) with respect to the IBM Range.