28 Jun
2001
28 Jun
'01
6:35 a.m.
I'm not sure where they are, at the moment, but I have a couple of
daughterboards that fit via cable into the 1771 socket but allow the use of a
179x device for double-density recording. I'm not at all sure that the 2.5 MHz
Z80 can manage the data transfer rate for DD 8" diskettes, but it's possible
that there's an associated update for the CPU that makes it possible. OTOH, DS
5-1/4" diskettes benefit greatly from DD recording. Unfortunately, I haven't
seen the one-page doc that goes with those boards in a long time, and I've never
seen the software update to support DD diskettes.
Dick
----- Original Message -----
From: "Steve Robertson" <steven_j_robertson(a)hotmail.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, June 28, 2001 11:54 AM
Subject: Re: Xerox 820
Thousands of
these were sold as bare boards with limited doc's. I
frequently ran into folks using them, yet never saw one in the original
Xerox enclosure. The Xerox box was just too expensive. Once they were no
longer a major product, they were surplussed out as bare boards. I think it
was through BG Micro.
I got several of the bare boards in a lot of XEROX stuff that bought several
years ago. Haven't looked in those boxes in a long time but if I recall
correctly, the DOCS were *minimal*.
If someone really wanted them, I'd be willing to part with the boards.
SteveRob
----- Original Message ----- From: "Rich
Beaudry" To: Sent: Thursday, June
28, 2001 9:12 AM Subject: Xerox 820
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Hello all, > > Recently I acquired a Xerox
820, but as a single board,
w/ power supply. I > also received many docs
(including a tech manual with
Monitor listings and > schematics). I know originally these were
"all-in-one" computers, but many > appear at ham fests in exactly the same
shape as mine -- as a single board > computer.