Fingers Crossed for 2021 ...

2020 was the worst! COVID kept the museum closed for much of the year and a mains water pipe bursting causing a flood kept us closed for the rest. 
We're hoping to re-open in the next few months ... fingers crossed! Read More >>>

Please Donate Via Just GivingNo visitors, no workshops, no events, no school visits... no income. We know that things are tough for everyone right now, but if you can afford to help us through these tough times please donate what you can.

There's over 36,000 exhibits here! That should keep you occupied for a bit - get searching!

Or come and get involved on our social media channels ...

      Twitch  Facebook          Online Gift Shop      

Thank you.

LSI Octopus Computer

The LSI Octopus is an 8-bit microcomputer with a 16-bit processor from LSI. 

LSI Computers Ltd was a British company from Woking in Surrey.

The Octopus was marketed as a flexible machine, suitable for single-users, but capable of expansion as the needs of the user grew. In its minimum configuration, the Octopus is a transportable computer which uses a television set as a screen. This can be expanded to comprise a 16-bit microcomputer with up to 6 terminals, which can be linked to other microcomputers as a local area network. The dual processors in the Octopus are the Intel 8088 and the Zilog Z80B, which run both 16-bit and 8-bit software, the dual CPU layout meant the machine could run CP/m or MPM with either the Z80 or 8088, and could run concurrent operating systems from one unit.

Operating systems are Control Program Monitor (CP/M)-86/80 PLUS, MP/M-86/80, Microsoft disk operating system, concurrent CP/M and the ELSIE System of LSI.

The best feature of the Octopus was its expandability, with its main board providing an expansion slot so that other boards or extra processors can be piggy backed on to it.

Manufacturer: LSI
Date: 1985

Comment on This Page

LSI Octopus Computer Manuals:

Item Manufacturer Date
LSI Octopus Technical Manual (1) LSI 1 Dec 1984
LSI Octopus Technical Manual (2) LSI 1 Dec 1984
LSI Octopus System Guide (1) LSI 1985
LSI Octopus System Guide (2) LSI 1985
Ferranti Basic 3.10 Reference Guide Ferranti 1986

LSI Octopus Computer Articles:

Item Manufacturer Date
40 Years of Space Invaders Unknown

Magazines RELATED to LSI Octopus Computer in our Library

Item Manufacturer Date
Practical Computing - February 1984 Feb 1984
Byte September 1992 23 Sep 2009

This exhibit has a reference ID of CH26767. Please quote this reference ID in any communication with the Centre for Computing History.


LSI Octopus Computer

Click on the Image(s) For Detail


Help support the museum by buying from the museum shop

View all items

Founding Sponsors
redgate Google ARM Real VNC Microsoft Research
Heritage Lottery Funded
Heritage Lottery Fund
Accredited Museum