I'm thinking that it would be Fun to have another Unibus chassis
on my 11/44 system, the better to hang some more peripherals from.
The current machine is stuffed like an Xmas turkey, and I would
rather not run the old power supplies our near their design limits
all the time.
I have several old 11/34a boxen lying under my (inacessable)
workbench. I got to wondering what would be involved in using one of
them for the Purpose. I somewhere dimly recall that the interface
cable for RK05 devices is in fact a Unibus jumper cable, but that
could be an optimistic imagination. I've got a couple of those idle.
Does anyone have any experience or thoughts about adding another
chassis to an 11/44 system?
[ Easy? Can o' Worms? Don't even *think* about it? ]
FWIW, I *do* have several (4) 11/44 boxes, but I'd like to save
them for spares in case the main box woofs it's cookies. The 11/34a
stuff is much better, if its feasible.
Cheers
John
Can anyone help this lady with some information on this device?
She is not on the list, so please at least copy her directly on any replies.
-jim
----------------------------------------------------------------------
>From: "Rosiecat" <rosiecat(a)mediaone.net>
>To: <jimw(a)agora.rdrop.com>
>Subject: NRI computer
>Date: Sat, 18 Dec 1999 14:25:51 -0800
>X-MSMail-Priority: Normal
>X-Mailer: Microsoft Outlook Express 5.00.2919.6600
>X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600
>
>Hello,
>I found this old computer in a thrift store and was wondering if
>you have any info re: "National Radio Institute Model 832 Digital
>Computer". It measures 22 1/4" wide and 15"deep and appears to
>look about circa 1970s. It has no ports at all any an electrical
>plug. There are 128 switches under a broad category marked
>"Computer Memory", all numbered switches 1-9, and A-F.. The
>switches work and the lights work. There is even an Accumulator
>category, a 7 switch "Register" set, Display/Speed/Clock switches
>and more. Can you give any information as to what this is.
>
>Regards,
>
>Donna Fuller
----------------------------------------------------------------------
---
jimw(a)computergarage.org
The Computer Garage - http://www.computergarage.org
Computer Garage Fax - (503) 646-0174
>At 10:19 AM 12/19/99 -0500, Megan wrote:
>>Check the settings of the DEQNA... it has a setting which allows it
>>to reboot the machine if it doesn't receive traffic within a certain
>>amount of time.
>
>No way! Really? Is this true of the DELQA as well? How would one go about
>figuring that out?
>
>--Chuck
On the DEQNA, the sanity timer jumper is W3, located below the Boot/Diag
ROM near the board handles.
Thanks for the answers--- yep, that's what I've got. I love those old
orange plasma screens. Nice and crisp, even when older. I'll try to
set up some 720k Dos disks and see what's up. Mine are hard-
drive-less, either because they came that way or they drives were
just yanked and thrown out when they were retired.
My first exposure to a plasma screen was back in '79 when I was
visiting the University of Illinois to see if I wanted to go there, and
they had the Plato terminals all over campus. IIRC, the displays on
the Plato's also doubled as a rear-projection screen for slides and
were touch-sensitive. Pretty cool for '78-79......
I'm also getting an old Zenith portable from the same era. Don't
know if it works yet -- needs 12vdc but the polarity isn't listed, so
I'm a little hesitant to just shoot it some juice. I don't know if they
were smart enough to put diodes on the input to block reverse dc
or not....
The Zenith has two 3.5" floppies that pop up from the area just
above the keyboard, kinda like an IBM. When I get the case open
and determine polarity, I'll see if it works.
Paul Braun
NerdWare -- The History of the PC and the Nerds who brought it to you.
nerdware(a)laidbak.com
www.laidbak.com/nerdware
I was just given a 3100e/40 "laptop". It powers up, screen works,
goes through bios and then asks for a boot disk. The expansion
bay is empty, which is where I assume the hd goes.
I tried booting from a DOS 6.22 disk, but it couldn't recognize it. I'm
guessing that it's not a 1.44mb drive.....800k perhaps? (It's 3.5")
What version of DOS is the latest supported? I would also like any
info on the processor, etc. The little beast has one whole meg of
ram, so this is truly a power machine......remember when you
could fit a word processor into 64k of ram along with Basic?
Also, what kind of hd does it support? I'm guessing I'll have to track
down a proprietary drive carrier, but does it use ide or is it mfm/rll?
Thanks.
Paul Braun
NerdWare -- The History of the PC and the Nerds who brought it to you.
nerdware(a)laidbak.com
www.laidbak.com/nerdware
On Dec 18, 23:05, Zane H. Healy wrote:
> Not a good day, was working on my PDP-11/73 this morning,
> investigation shows I'd apparently smoked a Transceiver, and blown the
> fuse on DECNA Cab Kit.
I have days like that... I seem to have an unfair share recently :-(
> So did the Transceiver take out the fuse? I assume so, the three LED's
are
> lit on the DECNA, but what little doc's I've found on the card doesn't
tell
> me if that is good or bad. The transceiver definitly has a smokey smell
to
> it.
I don't know what the lights mean, but I've seen transceivers on Suns take
out the corresponding fuse. I'd remove the transceiver, replace the fuse,
and see if the voltage on the AUI connector is OK. Pins 1,4,6,8,11 should
be ground, and pin 13 should be +12V.
> Now why on earth would a transciever blow?
Possibly a short on the cable, but usually it's caused by surges (eg due to
induced current from a nearby lightning strike).
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
On Dec 18, 21:39, Richard Erlacher wrote:
> I've got a mystery before me . . . there's a component, probably a 64Kx8
> SRAM but, who knows? I can't find a lead on the manufacturer or
whatever.
> The part's numbered GLT751208-15 and four of them comprised the data
cache
> on an old '486 motherboard climing to have 256KB of cache. That,
combined
> with the number of the part, 512 for the number of k-bits and 08 for the
> data width . . . looks right, but I haven't seen a data sheet for a
64kByte
> Sram in a 32-pin package. All the ones I've seen are 128kByte parts.
That's my experience, too. Looking through my pile of early-90's memory
data books, I couldn't find that number listed. However, I found a couple
of 32-pin SOP devices made by Samsung that are 64K x 8: the KM68512 is
32-pin 64K x 8. It has the same pinout as the more common 32K x 8 28-pin
cache SRAM devices, except that pin 30 is an active-high CS (that would be
pin 28, Vcc, on most 28-pin 32K x 8 devices), pin 31 is A15 (the extra
address line), pin 32 is Vcc, and pins 1, 2 are N.C. (pin would be A16 on a
128k x 8 device). Apart from the NC on pin 2, that would make it the same
pinout as the common 128k x 8 devices. Incidentally, although the Samsung
book lists lots of other manufaturer's equivalents for nearly all their
devices, there are none listed for the KM68512. It's obviously not a
common configuration!
FWIW, several motherboards did use 4 chips rather than 8 for certain cache
sizes (mine uses 4 off KM681001 for 512K x 8 cache).
There are a few other devices that might fit the description, except that
they are BiCMOS centre-power devices (Vss and Vcc are in the middle of the
sides, not at the corners). It's very unlikely that any motherboard used
such chips for cache, I think.
Check where the 5V connection goes, and if it's on pin 32 (and possibly pin
28), I'd assume it's the "normal" pinout, and similar to the KM68512 I
found.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
At 11:14 PM 12/18/99 -0800, Rosiecat wrote:
>Hi Dave, Jim and all,
>
>Thanks for the reply and the information. Is this item worth
>anything(monetarily)? Or would it just look cool on display.
>Gotta love the internet I would of had to do mega research to
>find any info.
>
>Thanks again,
>Donna
It sold then for about $500. Now I'd say it would be great on display!
-Dave
I have a Sun 3/60 I'm trying to netboot. For rarp I need to know the
ethernet address of the 3/60. I don't have a console but I have a terminal
on the serial port so I can get to the boot monitor.
Thanks,
Kevin
-------------------------------------------------------------------------------
"It's you isn't it? THE BASTARD OPERATOR FROM HELL!"
"In the flesh, on the phone and in your account..."
-- BOFH #3
I dont know if you're talking about the T3100 (gas plasma screen, etc) but
the model number you mentioned sounds kind of similar so I'll spout off
the information just in case :)
The T3100 is a 80286 (at 8mhz, software switchable to 4) with a gas plasma
screen, so no batteries here :) Mine had 640k of RAM and i'm not sure if
it was expandable, so perhaps we're talking about different machines. It
did indeed have a 720k floppy drive, so you'll have to either transfer
any software you want to run to 720k disks or ruin some 1.44 disks :) It
will run pretty much any version of DOS out there up to 6.22. Mine had
a 20 megabyte hard disk that I suspect was MFM, but the connector is
a proprietary compressed connector with 20 pins or so (can't quite
remember exactly).
Hope this helps (if you've actually got a T3100) :)
-Sean Caron (root(a)diablonet.net)
