Date   : Thu, 20 Jul 2006 01:01:08 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: What types of 3.5" Floppy work best with the BBC

>Message-ID: <44BBE279.8030902@...>
 
Jules Richardson <julesrichardsonuk@...> wrote:
> OK, I think you *need* a DSDD unit, don't you? I would have thought that the
> beeb can't cope with the data rate needed for a DSHD drive.
 
A DSHD drive *IS* a DSDD drive. The drive sends data at the speed
the floppy disk hardware *in* *the* *computer* asks for it. The
controller sends data to the drive at FM DD data rate when
formatting and writing. The drive has no choice but to send that
data back when the controller clocks it at FM DD rates when
reading.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
BBC BASIC for Windows and Internationalisation
  See http://mdfs.net/Software/BBCBasic/Windows/ProgTips