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.

This article on the TI990 was contributed by P Collins.


I worked extensively on the model before this, the 980B, when I was a flight simulator engineer at Britannia Airways in Luton.  One system drove the Boeng 737 simulator, with two Century Data 200Mb (!) exchangeable hard drives.

The other drove the visual system for the Boeing 767 simulator.

I recall using an oscilloscope and stepping through a program loaded into memory and checking the processor registers to look for a lost bit! We even disassembled the boot loader program so we step through it to find a problem. Long ago days!

Date : Unknown

This exhibit has a reference ID of CH40302. Please quote this reference ID in any communication with the Centre for Computing History.

Memories - TI990

Click on the Images 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