Unibus controller for MFM disks

Charles Dickman chd at chdickman.com
Fri Oct 14 22:25:23 CDT 2016

I don't know that Digital ever had a Unibus disk controller for ST412
interface disks, but were there any third party controllers? I'm in
need of disk controllers for PDP-11/40 and think that might be an
option given the availability of reliable MFM disk emulators.


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