22 Aug
2005
22 Aug
'05
6:10 p.m.
Subject: Re: WD 1793 FDCs for sale
From: Philip Pemberton <philpem at dsl.pipex.com>
Date: Tue, 23 Aug 2005 00:18:14 +0100
To: cctalk at classiccmp.org
In message <430A56EA.2050907 at bellsouth.net>
Glen Goodwin <acme_ent at bellsouth.net> wrote:
If I can ever scan it there is a design I have (NEC apnote) for a
data seperator for FM/MFM that works for any rate and media. Uses
a prom and a latch (yes a state machine) to do synthetic PLL. Analog
PLLs were causing people too much pain and oneshots perform poorly.
Lacking that if you can find SMC9229 or '39 part that does a lot
of the work for you.
Allison
Not in my experience. Surplus, yes -- pulls,
no.
I've bought lots of fuses and odd transistors from them
without problem.
That's been my experience too - I bought some uPD765 FDCs (actually Rockwell
R6765s, but effectively the same chip) from them a while back. No trace of
damage to the pins, no solder on them, still the same length they were when
the chips left the factory, and still splayed out.
Speaking of the 765s, I still need to build an MFM data separator...