Path: utzoo!censor!geac!jtsv16!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!SMOKE.BRL.MIL!info-apple-request
From: info-apple-request@SMOKE.BRL.MIL
Newsgroups: comp.sys.apple
Subject: (none)
Message-ID: <8906050716.aa11584@SMOKE.BRL.MIL>
Date: 5 Jun 89 14:03:50 GMT
Organization: The Internet
Lines: 17

Date: 5 JUN 89 13:16-
From: Achim Patzner <PATZNER@DBNINF5.Bitnet>
To: INFO-APPLE @ BRL.MIL
Subject: Re: writing synchronized tracks on Disk 3.5

Date:  5-JUN-1989 13:03:45.95
From: Achim Patzner <PATZNER@DBNINF5>
To:   0::"info-apple@brl.mil"
Subj: Re: writing synchronized tracks on Disk 3.5
Writing synchronized tracks is not as difficult as it is on 5.25" disks.
The Disk 3.5 provides a function/register "TACHOMETER" which gives 60
impulses per revolution. By counting these impulses you can determine
the length of the track. This information should be enough to synchronize
tracks, as you can easily determine relative positions of tracks towards
each other.

Achim Patzner