H89 disk imaging

From: Fred Cisin <cisin_at_xenosoft.com>
Date: Tue Jul 27 22:01:10 2004

On Tue, 27 Jul 2004, Dan Lanciani wrote:
> Did you ever get this going? I'm looking at a different approach, reading
> the single density disks a track at a time in double density and then doing
> the data separation in software.

A double density read with a PC FDC isn't going to work.
In fact, the NEC 765 type FDC (as is used in ALL of the PCs)
doesn't HAVE a track read; instead it has a "smart"
multi-sector read.

OTOH, if you use different hardware than a PC type FDC,
a track read of flux transitions can work.
Received on Tue Jul 27 2004 - 22:01:10 BST