Floppy drive pin 2 question?

[Pete Turnbull]

On Mar 11 2005, 12:44, Randy McLaughlin wrote:
> From: "Michael Sokolov" <msokolov at ivan.harhan.org>

> > Changing the RPM is an option on SOME drives, and for PeeCees to
work it
> > must be OFF.  It is very useful for Classic Computers, though.
> >
> > The high density select signal (pin 2) may or may not switch RPM,
but it
> > always switches the write current.

> No, I have refered to the TEAC site and to WDC:
>
> WDC referes to pin 2 as speed select, their controller can be used
with
> either single speed or dual speed 1.2mb drives:
> http://www.wdc.com/en/library/legacy/controllerboards/1006mm1.pdf

Michael is correct, the exact function varies from drive to drive, and
it always involves changing the write current.  Some drives have
several jumpers to affect this.  I could show you several from my
collection like that.  Some controllers work at two speeds, some at two
data rates.  Some of the WD controllers can be configured either way.


-- 
Pete						Peter Turnbull
						Network Manager
						University of York