Actually they could all write MFM (double density). The problem was that
some couldn't read what they had written because there was inadequate write
precompensation and the waveform peaks were at the wrong time during read
and their amplifiers weren't sensitive enough to catch them. In any case
what the COULD and what the DID were often not the same.
Dick
-----Original Message-----
From: Tony Duell <ard_at_p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp_at_u.washington.edu>
Date: Saturday, June 12, 1999 5:42 PM
Subject: Re: tandon 848-2 8" floppy drive
>>
>> Does anyone here have the specifications for a Tandon 848-2 8"
>> floppy drive? Mainly i'm interested in if it is DSDD, and if
>
>Easiest way to see how many sides it can do is to look at the number of
>heads. If the thing on the 'top' side (away from the spindle) is a head
>(i.e. it has wires going to it), it's double sided.
>
>Also look at the number of index sensors. Most (all?) double-sided drives
>have 2 of them as the index hole is in different places on SS and DS 8"
>disks.
>
>AFAIK, almost all 8" drives, other than possibly the _very_ early ones
>can do double density.
>
>-tony
>
Received on Sat Jun 12 1999 - 18:48:46 BST