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From: wilko@idca.tds.PHILIPS.nl (W.C. Bulte)
Newsgroups: comp.periphs
Subject: Re: Want to change 8 inch floppy to 5 inch
Message-ID: <1238@idcapd.idca.tds.philips.nl>
Date: 20 Mar 91 14:51:12 GMT
References: <507224ce.1bc5b@pisa.citi.umich.edu>
Organization: Philips Information Systems, Apeldoorn, The Netherlands
Lines: 16

ST506 is a HARD disk interface, not floppy! I think it is something like
SA450 for floppies. In general, a lot of the signals on this 50 pin 8"
drive cable are not used for most systems. The 34 pin 5" version is a sort
of subset of the 8" interface. A normal 8" drive spins at 360 rpm, giving a 
data rate of 500kbits/s. Most 5" floppies spin at 300 rpm, there are 
versions however, who can spin at 360 and 300 rpm. The 300 rpm is used for
PC double density disks.

Hope this helps 

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