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65264 Programming LEO I: LEO I Actions

Section from a training course or manual on programming LEO I, with manuscript notes in an unidentified hand.
Includes:

LEO I Actions [with annotations for LEO II], dated Feb 1956;
amendment dated 4 May 1956;
Storage and physical characteristics;
Timing;
Multiplication;
Shift;
Preset halt;
Tube actions;
Input Orders and Characteristics;
Decimal Orders;
Output: Orders and Characteristics;
Synthesis Programs;
Function Minor-Cycle (Printing);
Formed Orders.

Research Comments: This documents gives a useful overview of LEO I, covering orders, input/output, physical characteristics, delay line access time, decimal/binary conversion and reconversion, synthesis orders (initial orders) etc. The handwritten sections are possibly in Mary Blood's handwriting. (LM)

Date : February 1956 to May 1956

Physical Description : 1 file (29 pages), paper; typescript and manuscript

Provenance :
Transferred to the LEO Computers Society archive by LCS Chair, Peter Byford.

Archive References : CMLEO/LS/MN/PRG/65263/1 , CCH LI 12.5 , DCMLEO20210720001-029

Related Topics:

LEO I

This exhibit has a reference ID of CH65264. Please quote this reference ID in any communication with the Centre for Computing History.

Article: 65264 Programming LEO I: LEO I Actions

This document has been scanned and is available to view online.
Copyright
LEO Computers Ltd copyright
File Size: 7.91 MB

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