Prior to the IBM PC, what computer used cards that have a mounting bracket
perpendicular to the contact edge?
--
David Griffith
dgriffi at cs.csubak.edu
David Riley <fraveydank at gmail.com> wrote:
> On Jun 26, 2013, at 9:45 PM, ben wrote:
> > What happend to all the mainframes?
>
> No one wanted them when they were just "old", so they were scrapped
> for steel and copper. Same as all the other computers, except the
> small sample that survived because people forgot they were sitting
> in the attic (it's harder to forget there's a mainframe sitting
> anywhere, and good luck getting it to the attic).
(OK, ok, not sure if that qualifies as a mainframe, but being the size of a rather large chest freezer it has to be at least a supermini.)
The IBM 4331 Hans Franke, John Z. and my humbleness rescued back around 2000 here in Germany was indeed stored in the attic of an, IIRC, three-storey house with no elevator, and had to be manhandled down the stairs. No idea how the former owner once got it up there, we however dismantled pretty much everything, took the heavy innards (Ferro-resonant transformers, PSU boxen and the "logic gate", a swing-out frame containing all the boards) down separately and only then were able to handle the empty frame. Still managed to punch quite a substantial hole into the PVC flooring of a stair with a corner of the frame.
The twin disk drive that came with the unit unfortunately was not so easy, the drive mechanisms were already separate but the rest of the stuff (including the rather heavy air pump and motor) weren't easily removable and thus left inside the Frame. Unfortunately that drive was deemed unsalvageable afterwards, so once we get the Computer operational (it is reassembled and the Service processor is accessible via the System terminal, but IIRC something crashes without so much as an error code when the SP tries to enable power to the CPU), we won't have period storage for it.
So Long,
Arno
Twenty-some years ago I wrote a program on an SGI personal IRIS 4D-35
(33MHz R3000 system). It took a hideously long time to run. I recently
dusted off the code and started playing around with it and much to my
horror there were a few optimizations I missed, and now I'm curious
(probably not a good thing) as to how long the updated code would run on the
system (we're talking "days to minutes" type of optimization).
Does anyone have access to such a system that would be willing to run the
code? It's straight forward C code so it should compile without a problem.
-spc
A box of books arrived here this evening, in excellent condition. The
books are absolutely pristine - and heavy. It took 8 days to get from
California to Sweden, not bad.
Thanks!
/Jonas
Hi,
There is a lot with IBM circuit boards on
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=58&t=18960
I don't know if there is any value for collectors but I thought I would
pass it along.
It isn't my cards but if I manage to broker a deal I get a kickback...
remember mention me if you buy the collection.
:-D
Date codes I see on the IC:s range between 1974 and 1982.
G?ran
> Twenty-some years ago I wrote a program on an SGI personal IRIS 4D-35
>(33MHz R3000 system). It took a hideously long time to run. I recently
>dusted off the code and started playing around with it and much to my
>horror there were a few optimizations I missed, and now I'm curious
>(probably not a good thing) as to how long the updated code would run on
the
>system (we're talking "days to minutes" type of optimization).
>
> Does anyone have access to such a system that would be willing to run the
>code? It's straight forward C code so it should compile without a problem.
>
> -spc
>
I have a Personal Iris that can be pulled out for use and be up in running
pretty quickly.
It's the 4D/20 so it's the slowest model they sold (12.5mhz) but it's
crammed with 64mb of ram which on its own caused a performance boost in Irix
4.0.5 from the 16mb that was originally in it and it's been fitted with the
Z-buffer, Bitplane and Turbo Graphics options. Failing that I have three
separate Indigos running R3000, R4000 and R4400 processors but they'll take
a bit longer to setup.
There's a nice looking HP 98155A keyboard up on Ebay for a buy-it-now price of $29.99 (though pretty hefty shipping). This is the keyboard that interfaces with the HP 9915 and is seldom seen. I'd snag it but I already have one.
http://www.ebay.com/itm/HP-Hewlett-Packard-98155A-Keyboard-Vintage-HP98155A…
Grab it while you can.
Wayne Smith
>If you want enough of it, you could probably get it made, but AFAICT
>there's none commercially available. Small quantities show up on eBay
>occasionally.
What is the effect of unoiled tape in a Model 33? tighter oiling schedule?
I have a PDP 11/03 that used to be part of the startup for an 11/780 at
the University of Arkansas at Fayettville. The 780 has long ago been
scrapped.
So, the 11/03 has the following boards:
M8017-AA : DLV11-E/EC Single-line async control module (Replaces
M8017,M8017-YB) Renamed DLVE1
M7940 : DLV11 Serial Line Unit (SLU, Async)
M7944 : MSV11-B 4-Kword 16-bit MOS RAM
M7946 : RXV11 RX01 8" floppy disk controller
M9400-YE : Bootstrap terminator
I also have the RX01 drive. So, other than media, what other options do
I need to get this running as an 11/03? Where is the best place to get
some basic media images? Is it possible to create boot media on the 8"
drives I have connected to my PC using IMAGEDISK, 22DISK or the
catweasel?
I know a lot of these questions are answered out there, but I've not
seen (yet) a simple step by step to get one of these running.
I have the opportunity to get a couple of memory boards also:
M8044-DB 32K, 16-BIT RAM for LSI-11
M8044-DE 32K, 16-BIT RAM for LSI-11
So, will these work with this 11/03? It seems they will, but I was
looking for verification.
Thanks for any help, and of course the associated "have you tried
googling..." responses.
Kelly
