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From: schuster@dasys1.UUCP (Michael Schuster)
Newsgroups: comp.sys.atari.st
Subject: Re: high density 3.5" disks
Message-ID: <1940@dasys1.UUCP>
Date: Tue, 10-Nov-87 17:28:17 EST
Article-I.D.: dasys1.1940
Posted: Tue Nov 10 17:28:17 1987
Date-Received: Fri, 13-Nov-87 20:42:53 EST
References: <2923@hcr.UUCP>
Reply-To: schuster@dasys1.UUCP (Michael Schuster)
Organization: The Big Electric Cat; New York, N.Y. USA
Lines: 23
Summary: Dont think they'll work with ST

In article <2923@hcr.UUCP> miken@hcr.UUCP writes:
>
>Does anybody out there in netland know anything about these little wonders,
>aforementioned hardware, and most importantly, how I can make my ST
>use these disks? 

These diskettes write 80 tracks x 18 sectors/track. They require a special
drive mechanism whose write bias is adjusted by a special pin on the
cardedge. Similar to the way AT clones enable the 1.2MB 5.25" drives.

A friend and I recently tried an external high density drive (made by NEC)
designed for AT clones. It could read 720K diskettes but little else. It
could not read 1.4 MB PS/2 diskettes at all. Probably the controller is
incapable of recognizing this format - DiskMech said the tracks were
blank. 

Perhaps these beasties could be run through a hard disk controller, like
Supra's 10MB floppies. If not - I fear it may be hopeless.


-- 
l\  /l'   _  Mike Schuster          {sun!hoptoad,cmcl2!phri}!dasys1!schuster
l \/ lll/(_  Big Electric Cat       schuster@dasys1.UUCP
l    lll\(_  New York, NY USA       DELPHI,GEnie:MSCHUSTER  CIS:70346,1745