icl2900.org.uk Documents

Overview

These are various documents that have come to light. There are not many, as they are fairly difficult to come by. However, they may be of interest.

Books

The ICL 2900 series, by John Buckle.
This book is a reasonable overview of the 2900, although its contents were constrained by ICL at the time, and there is a lack of hard facts.

ICL documentation

ICL 2900 Order Code
A complete definition of the primary order code (instruction set) of the 2900 series, intended for programmers. See also the Order code page.

Papers

An Outline Of The ICL 2900 Series System Architecture, by J.L. Keedy
A useful overview of the hardware and software architecture.
The_Hardware/Software Interface of the ICL 2900 range of computers, by D.H.R. Huxtable and J.M.M. Pinkerton
Another useful paper detailing the design interactions between hardware and software.

Other documents

SFL Programming Card
A programmer's reference card for the System Function Language (SFL). This is what would normally be called the assembly language, but it was termed this for marketing reasons.
ICL 2900 Series - Models 2946 to 2988
This third party document compares various machines in the 2900 range, and briefly contrasts them with the competition.

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Last updated: 09 Feb 2026