Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?

[Fred Cisin]

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