The 1900 Range – Index

1 - 1900 Architecture and System Description

1.1 - How the ICT 1900 Series evolved

1.2 - The ICT 1900 Range in 1966

1.3 - ICT 1900 Range Architecture

1.3.1 - System Architecture

1.3.2 - Standard Interface

1.3.3 - 1900 Executive

1.3.4 - The 1900 Range Order Code

1.3.5 - FP6000 Processor Data Flow

1.3.6 - Span of the Range

1.4 - Hardware technology in the ICT/ICL 1900 Range

2 - 1900 Performance and Competitive Position

2.1 - 1900 at the start- FP 6000 performance

2.2 - Performance of ICT 1900 in 1966

2.3 - Performance of ICT / ICL 1900 Series (All Models) and 2903/ME29

2.4 - ICT 1900 competitive position

3 - 1900 Software

3.1 - The FP 6000 Software (Before the 1900 Range)

3.2 - ICT 1900 Range Software - The Start

3.3 - Programming Aids (Software) in 1966

3.4 - The Operating Systems (George).

3.5 - ICT/ICL 1900 Software - Two views from the Board

3.6 - ICT/ICL 1900 Software in 1972

4 - 1900 Range in the Market

4.1 - 1900 Road Map

4.2 - Approx. Quantities delivered.

4.3. - Customers list and Applications

4.3.1 - The 1900 Users Group

4.3.2 - Some Customers Details

5 - 1900 Acknowledgements and References

Comments received

Virgilio Pasqoali

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.