5 Oct
2018
5 Oct
'18
3:43 p.m.
On Fri, 5 Oct 2018, steve shumaker via cctalk wrote:
I've scanned something called the "MPI
Flexible Disk Drive Interfacing Guide"
for the Model 51/52 floppy units
Is that the same as:
http://www.osiweb.org/manuals/MPI_B51-B52_Product_Manual.pdf
?
Q: Is the 91/92 being asked about merely a 96TPI version of the MPI
B51/B52?
The QT Systems ad in Infoworld that Google comes up with as an early hit
says 77 track (not 80). It correctly refers to the B51 as "Sgl
sided, Sgl/Dbl Den", but refers to the B52 as "Sgl Sided,
Dbl Den", rather than double sided single/double density.
So, although 77 V 80 tracks is a definite possibility in those days, the
reliability of the specs in that ad are questionable.
The B51 was the first non-SHugart 5.25" drive that I ever had.
substituting it for the SA400 was truly trivial.
Motor speed seemed to wander a bit, but the track alignment held more
stably than the SA400.
--
Grumpy Ol' Fred cisin at xenosoft.com