On Sep 24, 14:24, Joe wrote:
> I'm still trying to find out where the 2.4Mb 5 1/4" floppy drives came
from.
> The sled has IBM PN 25F8398 on it. I've searched Google and IBM's site
for the number but didn't find anything. I found these drives in the same
pile with some IBM RS/6000 cards. Does anyone know if the RS/6000 uses
anything like this?
I'd never heard of a 5.25" 2.4MB floppy before this, but I know that some
models of the RS/6000 range and I believe also some PS/2 range had
so-called "2.88MB" 3.5" floppies. I have one here (the drive,that is, not
the RS/6000). They look just like ordinary 3.5" HD floppies except for the
extra media sensor. They can use normal DD or HD disks, or special ED
disks which have the media sensor hole in a different place to HD disks --
it's slightly further from the bottom edge, so if you put an ED disk in an
HD drive, it would be seen as DD. However, the coating is a special barium
ferrite rather than the normal cobalt ferrite, and for ED, the drive uses a
vertical recording technique developed by Toshiba instead of normal
longitudinal recording. If the disk in the drive you've found looks just
like a normal HD floppy, that's what it is -- not an Extra Density one.
Apart from IBMs they were also used in 3Com Netbuilder routers.
--
Pete Peter Turnbull
Network Manager
University of York
> From: Merle K. Peirce <at258(a)osfn.org>
> The 820, is, I think, my favourite CP/M machine.
Mind if I ask why? So far I still prefer my Kaypro 10, but my mind is
always open ;>)
> They can be twitchy
> though, often stemming from dirty contacts on various cards.
I'll keep that in mind.
> I might have some Xerox manuals somewhere. They might be buried deep,
> though. Want me to look?
Only if it is convenient for you.
> WordStar runs very nicely on the 820. I used
> it for a number of years.
Fortunately, I have WS 3.3, dBase II, and Multiplan.
Anyway, thanks for the info.
Glen
0/0
Search eBay for A2580-60001. I think that is the correct part number for a
64MB module which works for this system.
You can get a pair (128MB total) for $15 or less right now.
>From: "Peter C. Wallace" <pcw(a)mesanet.com>
>Reply-To: cctalk(a)classiccmp.org
>To: cctalk(a)classiccmp.org
>Subject: Re: Slightly OT: HP 9000/C160
>Date: Mon, 23 Sep 2002 13:55:33 -0700 (PDT)
>
>On Mon, 23 Sep 2002, Patrick Finnegan wrote:
>
> > I've managed to pick up a memory-less HP C110 that was upgraded to a
> > C160. Looking at Kingston's site, they want way too much for new memory
> > for it. Does anyone have extra memory, or a source for memory? I've
>also
> > got an HP Apollo 715/50 - is that memory compatible?
> >
> > Thanks for the help!
> >
> > -- Pat
> >
> >
>
>715 memory is not compatible with C110 memory. You should be able to find
>cheaper memory from one of the HP re-sellers. A friend of mine with a C110
>did
>that and I dont think he paid more than $50 or so for 256M... Another
>(perhaps cheaper) option is finding another C110...
>
>
>
>Peter Wallace
_________________________________________________________________
Join the world’s largest e-mail service with MSN Hotmail.
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> From: Dan Cohoe <dancohoe(a)oxford.net>
> I have a very complete set of docs and software that I received in the
last
> month for the Xerox 820.
> What do you need? Immediately, its probably easier for me to scan stuff
than
> to attempt to copy diskettes.
This is good news! Whatever you can provide (at your convenience, of
course) would be greatly appreciated. I'll be glad to pay for media,
postage, etc. -- please let me know.
Thanks,
Glen
0/0
I have just been offered an altair computer, it's been sitting in the back of
a garage, unused for some time.
I don't want to just plug it in and power it up right away do I ?
Inspect -- what am I looking for?
Clean -- best method?
It is described as "not having switches or blinking lights", having floppy
disks, having been used for somthing to do with ham radio.
This is in advance of actually getting the computer,
Greetings to all --
About a year ago, Joe Rigdon very kindly gave me a number of old machines
(thanks, Joe!), among them a Xerox 820. At the time he gave it to me, the
unit didn't power up, but today I finally found the time to give it a
second look. After I reconnected a loose lead inside the box it came to
life! This is my only machine with 8" disk drives, so I'm interested in
finding a good use for it.
I could use some help from the list members, though. I found *no*
technical data via Google, and have *no* real docs for this beast. After
poking at the 820 for a bit, here's where I'm at:
--> The "B" drive is faulty. Disk initialization fails, and it will not
consistently read disks created on the "A" drive. Any pointers on
replacement drives? Even if a thorough cleaning revives this drive, I'd
like to obtain a spare.
--> Assuming I can't revive the "B" drive or find a replacement, how can I
duplicate diskettes? The CP/M utilities all seem to want two drives in
order to do their job.
--> Two of the boot diskettes which I have boot up a pretty normal looking
version of CP/M 2.2, with a normal "A>" prompt, but another diskette
displays the following upon boot:
"Good Day! ZCPR 2.04 SYSTEM READY"
and the prompt is "A0>" (obviously user group 0). What is this "ZCPR"?
--> Some of the utilities on the boot diskettes (FMT, for example) refer to
hard disk drives. What's involved in attaching a hard drive to this
system?
--> The flimsy "User Manual" which I have states that the RS232 port may be
configured to attach to a terminal or to a modem. How?
--> Lastly, does anyone have any documentation on this thing? If you can
part with it, I'd be glad to pay a fair price.
Thanks in advance for any help you can provide. Although this system
doesn't appear to be special or unique, it does seem to be a sort of nice,
friendly critter, and I'd like to put it into use.
Later --
Glen
0/0
If I am not for myself, then who will be for me?
And if not now, when?
-- Pirkei Avot
An interesting early CPM computer, complete with monitor and fdds. AES is
Automatic Electronic Systems, a Montreal company that was founded by
Stephen Dorsey who then sold the company and went on to found Micom.
He put out a remarkable Word Processor/computer called the MICOM 2000
before the Apple got out of Woz's garage. AES must have mfrd. this after
Dorsey sold it. No date given but likely pre 80. Wish I could afford it.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2056611909
Lawrence
lgwalker(a)mts.net
bigwalk_ca(a)yahoo.com
As seen on port-sparc at netbsd.org
Please note location...
Bob
----- Original Message -----
From: "Greg MATTHEWS" <G.Matthews(a)cs.ucl.ac.uk>
To: <port-sparc at netbsd.org>
Sent: Monday, September 23, 2002 6:00 AM
Subject: sun equipment free to any home!
> my department is about to send an awful lot of old sun stuff to landfill.
lots
> of monitors (not multi-sync) ipcs ipxs and classics. if you can collect
you
> can take away. i have cleared this provisionally with my line manager.
>
> no warrentee on anything, has to go asap.
>
> GREG
>
> -------------------------------------------------------
> Greg Matthews tel: 020 7679 3668
> Networks and Multimedia Group fax: 020 7387 1397
> Department of Computer Science
> University College London
> -------------------------------------------------------
>
