My Altair has the NorthStar controller. It's one
card of TTL chips and
uses a 5 1/4" drive. I'm fairly sure it uses 10 sector disks (same as the
North Stars) but I don't it working yet so I'm not positive about the
number of sectors.
It's likely the same as the controller was used in a lot of systems. It
was the first disk upgrade to my altair prior to retiring it. Typically
if the drive box was bought from NS* the box would be the same blue as
altair.
Allison