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From: jkaidor@ (Jerome Kaidor)
Newsgroups: comp.periphs
Subject: 720K Floppy Drives
Message-ID: <22134@mvis1.com>
Date: 21 Dec 90 22:15:22 GMT
Sender: jkaidor@synoptics.COM
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Organization: SynOptics Communications Inc. Santa Clara, Ca.
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    Can anyone help?  I am trying to interface a 720K 3.5" floppy
drive to my PC.  After getting all the wires right, I now find the PC
returning a "drive not ready" indication from this floppy.  It seems
that there is some difference here from the 5.25" floppies, in terms
of the electrical interface signals.  The computer is a "tiger-286 AXT
" card, which is a 286-based XT bus system.  The BIOS looks at one of
the dip switches on the motherboard.  If that dip switch is on, the
BIOS simulates "drive always ready", or something to that effect.
Anyway, with that switch on, the 720K drive works, but my good old
1.2Meg drive turns into a 360K drive!  So my precise question is:
Which shugart-bus wire is the 720K drive leaving "not ready"?  Thanks
in advance...

    - Jerry Kaidor ( jkaidor@synoptics.com )