Things are tough right now ...

They're tough for everyone :( But when coronavirus hit here in the UK, the museum had to close its doors to the public, and we lost practically all our income overnight.

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.

The Mill

This expansion card for the Apple II was developed by Stellation Two. it contains a 6809 microprocessor which can execute code concurrently with the Apple II's 6502 processor. The card is supplied with the OS9 operating system, the BASIC09  language, and full documentation.

Date : Unknown

Manufacturer : Stellation Two

Format : Expansion Board

This exhibit has a reference ID of CH41138. Please quote this reference ID in any communication with the Centre for Computing History.

Scan of Document: The Mill

Click on the Image 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