Chris Fenton here - someone did actually send me an 80MB 'disk pack' with software, and I was able to modify a super old disk drive to actually read it:
Andras Tantos and I have been collaborating on this together for a while now, and he actually has a downloadable Cray X-MP datacenter simulator he wrote, where you can run the COS image I found:
This isn't about web design. You should just add links to these articles on the article you submitted. Good for google ranking, increases the chances of someone reading them, makes user happy :)
http://www.chrisfenton.com/cray-1-digital-archeology/
And thanks to some awesome help from others, I was able to actually recover a copy of COS (Cray OS):
http://www.chrisfenton.com/cos-recovery/
Andras Tantos and I have been collaborating on this together for a while now, and he actually has a downloadable Cray X-MP datacenter simulator he wrote, where you can run the COS image I found:
http://www.modularcircuits.com/blog/articles/the-cray-files/