Hi g8jzyian
Thanks, I did see that but the page here appears to suggest that the B90 used the mini disk 2 rather than the mini disk 3 but perhaps it means that the B900 used the mini disk 3?
http://www.picklesnet.com/burroughs/...bpgb90-900.htm
However I have to admit I did not even consider for a moment that the 3 means 3MB - amazing storage for an 8" floppy disk in 1980!
Cheers
Robin