Subject: Re: Z80 home brew with FDC
From: Eric Smith <eric at brouhaha.com>
Date: Sun, 21 Sep 2008 14:43:09 -0700
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at
classiccmp.org>
Alexis wrote:
The other thing that puts me off is the data
clock separator. How are you
doing this?
I can't speak for Andrew, but if you're not using an FDC with a built-in
data separator, the easiest way to do it is to use the SMC 9216, 9229,
or 9239 digital data separator chips, some or all of which were
second-sourced by Western Digital. Of course, they were obsoleted by
the newer FDCs with internal data separators.
It can also be done with a small amount of ttl. Of course the 37C65 if
you can find it or salvage it off an old PC floppy/ide board will be
far lower parts count.
Allison