On Thu, 16 Nov 2000 17:43:57 -0500 "Robert Stek" <r.stek(a)snet.net>
writes:
> ... and after that it starts to get too modern. But micros's have
> always been a passion - even though I am a clinincal psychologist by
> training, and I work in program evaluation in health care.
Gee Bob, with the ESP program, and subsequent brainwave business,
I thought fer sure you'd be a para-psychologist! :^)
Who you gonna call . . . ?
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Pete:
Is this thing L-Shaped? If it is, then this is the 'l-board'
that goes into Hp 9000/375 (I have one of these sitting in my
garage).
Anyways, many of these were swapped out in favor of a *real*
68040 running at 25 or 33 Mc. HP used these boards because
(presumably) they had their 68040 system board laid out and
ready to go but Moto didn't quite have the silicon yet.
SO they outfitted the 9000/375 with this kludge (that used a
68030), and the later 380's were the same hardware with the
real processor installed, instead of the L-board.
The SC140475RC50 is a 68030 (custom spec'd in some manner)
running at 50Mc.
I would be really curious to know if this thing functions
as an '040 in other systems . . .
Jeff
On Thu, 23 Nov 2000 23:54:35 GMT pete(a)dunnington.u-net.com (Pete
Turnbull) writes:
> I've found an HP board, which has "HP 03812L" and then "98574-66513"
> on it.
> I think this is a part for an HP9000 system, more precisely a "68040
> EMULATION PROCESSOR". Is this something you can plug in in place of
> a real
> 68040, and if so might it work in anything other than an HP9000?
>
> It sounds plausible, since it has an SC140475RC50 (looks like some
> kind of
> processor?) and an XC68882RC50A (FPU) on it, as well as an MK4202P
> (eh?),
> some fast logic, some cache RAM, and a 184-pin "plug" that obviously
> plugs
> into something like a processor socket. I was given it for the
> 68882, for
> use in a Mac, but I'm wondering if it's better left intact...
>
> BTW, anyone know the difference between an MC68882 and XC68882?
>
> --
>
> Pete Peter Turnbull
> Network Manager
> Dept. of Computer
> Science
> University of York
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On Nov 23, 16:03, Chris Kennedy wrote:
> Pete Turnbull wrote:
>
> > BTW, anyone know the difference between an MC68882 and XC68882?
>
> When we were building accelerator boards for the Amiga we used to
> get those all the time. The Mot rep claimed they were pre-production
> parts, or more properly, parts which hadn't been subject to the
production
> acceptance criteria.
>
> Translation: They're the things that showed up when you ordered MC68882s
> too early in the game...
That would fit -- the one and only reference I found to the HP board number
says it was superceded by another, similar board, suggesting this one is an
early one. And why would anyone make a complex and presumably expensive
68040 emulator when you could just buy the real thing? Only if you
couldn't yet obtain the real thing, I suppose.
Thanks, Chris!
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York
On Nov 24, 0:00, Tony Duell wrote:
> I believe there is a balun-type thing that lets you use a piece of
> twisted pair cable in place of a piece of coax _for a 10base2 network_.
> The signals on the twisted pair are not 10baseT, and you can't use it as
> a converter. In particular if you want to link multiple machines together
> with twisted pair you need _2_ baluns at each machine (linked up to a BNC
> t-piece) and 2 pieces of twisted pair cable, one from the 'previous'
> machine and one to the 'next' machine, just as you would with coax.
Thanks, Tony. That's what I thought. In fact, at least one of the
catalogues actually says their baluns are only to carry 10b2 over twisted
cable.
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York
I've found an HP board, which has "HP 03812L" and then "98574-66513" on it.
I think this is a part for an HP9000 system, more precisely a "68040
EMULATION PROCESSOR". Is this something you can plug in in place of a real
68040, and if so might it work in anything other than an HP9000?
It sounds plausible, since it has an SC140475RC50 (looks like some kind of
processor?) and an XC68882RC50A (FPU) on it, as well as an MK4202P (eh?),
some fast logic, some cache RAM, and a 184-pin "plug" that obviously plugs
into something like a processor socket. I was given it for the 68882, for
use in a Mac, but I'm wondering if it's better left intact...
BTW, anyone know the difference between an MC68882 and XC68882?
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York
I have a short 8-bit card with a strange mouse socket. It could be
a Zenith card as I found it in an old Zenith PC case piled up inside
with other cards which obviously didn't belong to the Zenith.
It has a DE9 monitor connection with a mono/color switch below it
and a port labelled "mouse" below that. It is a DIN with 9 staggered
holes but smaller than your standard k-b socket and larger than a
PS/2 or Mac one. Internally it has 2 game and one light-pen
connectors. It's most significant chip is a 100pin surface mounted
6612. The only removable chip is labelled AM2764ADC, and
838AE9G. Most of the other chips are logoed GS. There is a #
written with marker pen S88101035. Did Zenith have a proprietory
mouse at some point or is this another beast entirely. I notice that
most of the GS low-powered Shotsky chips are labelled some
multiple of H eg: H10, H18, H38 etc. which makes me think
Zenith/Heath.
ciao larry
Reply to:
lgwalker(a)look.ca
On Nov 22, 21:50, ajp166 wrote:
> >> AUI tranciever in a junk bin, but I've never seen 10BaseT-coax
> converter
>
> the net at work uses a few of them, those are just baluns.
I've never seen a 10baseT to 10base2 cobverter that was just a balun -- all
the ones I've seen consist of most of two trasceivers plus a little gubbins
between. Most of the baluns I've seen in catalogues only connect to one
pair of an RJ45, but I have seen one in a catalogue that connected to pins
1/2 and 3/6. Does that really work?
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York
--- John Honniball <John.Honniball(a)uwe.ac.uk> wrote: >
> > anyway - I can alway find the correct controller card
> > for them. I think it was Monsier Honniball who had
> > some RML380Z bits...
>
> Oh yes, 'twas I...
>
> Just the pile of boards and a case, as I recall. Taken
> apart years ago by somebody else. Damn, why can't they
> leave this stuff in one piece?
>
I wonder if there's a standard old single density floppy controller amongst them? I'm certainly
interested in taking them off your hands...
I've mailed a car-ready mate, so we can come up and collect the bits of suns cluttering your
garage, but he has yet to get back to me (He does work for DERA so email access is an intermittent
affair) Maybe i'll just try the telephone thing. Haven't used it a while - I wonder if it still
works?
Dave.
__________________________________________________
Do You Yahoo!?
Yahoo! Shopping - Thousands of Stores. Millions of Products.
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I've gone full time self employment and a lot of what I've collected/stashed
over the years is going to need to be gotten rid of to make room for working
and to store supplies. Hopefully I can get some of what I have into it back
on some things.
Much of it is PC/XT to 486 era stuff and a lot of that is PS/2 related. Some
of it is also Apple/Mac. As I go through the stuff and can determine what I
need to get rid of I'll post it here. Right now I have to go through gobs of
books and catalog them so I should have a list here soon. I'll also post
much of it on my web page at http://rbcs.8m.com/saleslist.html once I can
get it together. I'll have parts as well as whole machines.
Right now I have a bunch od working PS/2 model 55SX machines, main units
only, with HD and memory included. If I can get $5 each plus shipping I'd
break even on them. I also have a model 30 and a model 30-286, both in
working condition. Again if I can get $5 each plus shipping...
I have a book on Ebay right now that I could sell direct - Tandy CoCo 2
Advanced Color Basic programming book.
I'm in the middle of Kentucky and can ship USPS, UPS or if you're close
enough pickups or delivery can be arranged.
I've got a set of AT&T 3B2 OS tapes (I think for a /500 or /600) here,
that I never used back when I had a load of 3B2 stuff. They're
labeled:
Tape 1:
-------
AT&T 3B2
Operating System
Utilities
Release 3.2.1 V3
120MB Tape
Tape 2:
-------
Operating System
Utilities
Rel. 3.2.1 V3
Issue 2 (1Q92)
If anybody can use these, please let me know.
Bill
--
Bill Bradford
mrbill(a)mrbill.net
Austin, TX
