test-drb April 2021

test-drb@ccmp.vtda.org

104 participants
75 discussions

DEC BA11-K KY11-L mounting brackets -- how?

by jnc＠mercury.lcs.mit.edu

> From: Fritz Mueller > I'm reassembling an PDP-11/34 in a BA11-K chassis right now, and am a > little puzzled by the front mounting brackets (the ones that hold a > KY11-L of either sort on the bottom, and a half trim-panel on the top). > In particular, on the bottom half, the available place for screws to go > to attach the bracket to the chassis is nearly completely blinded by an > overhanging tab. > .. > Anybody have an 11/34 in a BA11-K and care to take a peek and tell me > how the hardware here is properly configured? Well, I have an KY11-LA mounted on a BA11-K; the KY11-LA and -LB use the same bezel, and should have identical hardware. There's an intermediate 10" or so high adapter piece (one either side, of course) mounted to the KY11-L. (That's attached to the KY11-L with short machine screws which are inserted from the rear, and go into tapped holes in the KY11-L bezel.) That piece attaches to the BA11-K with different hardware at the top and bottom: on the bottom, a single 1" or so machine screw (#8, I think) goes through the vertical tab on the side at the front of the BA11, to a tapped hole in the adapter piece. At the top, a pair of short countersunk machine screws (#10, I think - definitely larger than the 1" machine screw at the bottom) attach a pair (one each side) of those black plastic mounting widgets which have a pair of balls on stalks; those go into holes on the back of the blank panels, and those screw also hold the adapter piece to the BA11-L at the top. (I looked for the DEC formal name for those pieces, but couldn't find it.) > I'll get some pictures of the brackets I have, too -- maybe they aren't > the standard/correct ones for an 11/34... I'll take a look. I'm too burned out (COVID long haul) at the moment to take pictures or do a drawing right at the moment; if needed, I can do it tomorrow (or so). Noel PS: A while back you were after measurements on the KY11-L power knob; did you ever get those: If not, I've got one, and can measure it.

3 years

eBay sellers

by jnc＠mercury.lcs.mit.edu

> From: William Donzelli > Sellers of collectibles and antiques get bombarded with nitpicks and > corrections. Often these are right, but often they are wrong. Yeah, that's why I didn't just assert 'this is wrong, X is right', but I gave them the things to look at so they could verify for themselves that my claim was correct. > Passing a URL through the Ebay system is trickly, to say the least > ... "Check this document 123-456-78 in bitsavers, page 26". Yeah, I didn't try and pass a URL, too hard; (and in any case, a tricky con artist could point to a fake document they had posted). I guess I should have said 'Check the PC05 manual, look on BiSavers in dec/foo/bar to find it, pg. xyz'. > From: Bill Degnan > I went to this guys place and saw the tape reader first hand. Its in > better condition than mine. Oh, I didn't have a problem with the condition; just that it was incorrectly labelled. > From: Jay West > I would think the thing that would make it stand out and make him > change it - tell him a PC05 doesn't connect to a PDP8, it goes with > something completely different (a PDP11 ofc, correct?). Yes, the PC05 is for the PDP-11 (and others): https://gunkies.org/wiki/PC04/PC05_High-Speed_Paper-Tape_Reader/Punch Yes, what I _should_ have done is say 'the PC05 is for the PDP-11; the PC04 (which this is) won't work on a PDP-11. If a PDP-11 owner buys this for his PDP-11, he'll probably by unhappy'. Noel

3 years

Anyone know ancient versions of XLC?

by david4602＠gmail.com

On 4/9/21 3:23 PM, Nemo Nusquam wrote: > On 2021-04-08 00:32, Ben Huntsman via cctalk wrote: >> I know this is a strange place to ask, but it's as good a place as any. >> Anyone on here used IBM's XLC in very old versions? >> >> Anyone know what the argument -qdebug=austlib does? > > I have the docs for IBM C Set++ 3.1 for AIX (1993) and it is not there.? > As you probably know, the Austin lab was known for HPC s/w so they may > have shipped special debug versions. [..] I used xlc in the early 90's at IBM in the Raleigh networking lab, along with the excellent xcdb debugger - Austin's debug libs weren't a part of our repertoire. There was plenty going on that was deeper and closer to the iron in Austin, so it could be just about anything. AIX 3.2.5 was so much leaner and meaner than 4.x that came along next... I never did warm up to it the same way. - David

3 years

Wanted: DEC H960 cabinet, or similar rack of same size and vintage.

by mosst＠SDF.ORG

Hi All, I'm looking for a H960 to put my 8/e in, either to buy or to trade for something. (PDP-8/11/VAX/Alpha gear, KIM-1??) I'm in South-West England and am happy to collect from mainland UK. I may also be willing to have it shipped internationally. Regards, -Tom

3 years

DEC H8575-A DB25 to MMJ

by idinc＠swcp.com

hello all i am looking to purchase qty 2 DEC H8575-A DB25 to MMJ adapters. anybody have some that they can sell? also need a couple of mmj to mmj cables, 10' or longer would work. thanks tim timothy rutherford teor at nmia.com 505-550-5110

3 years

XXDP on a really small system?

by bob＠jfcl.com

I have an 11/03 (unmapped, of course) with 28kW memory and two DLV11s. I'm trying to build an XXDP image on TU58 that I can boot on this system, using an XXDP 2.5 RL02 image and simh. My simh configuration is - CPU 11/03, NOEIS, NOFIS, BEVENT disabled, autoconfiguration enabled, idle disabled . TTI address=17777560-17777563, vector=60, BR4 TTO address=17777564-17777567, vector=64, BR4 TDC controllers=1, address=17776500-17776507, vector=300*, BR4, 2 units . RL RLV12, address=17774400-17774411, vector=160, BR5, 4 units I can boot from the RL02 OK - MEMORY MANAGEMENT UNIT NOT FOUND BOOTING UP XXDP-SM SMALL MONITOR XXDP-SM SMALL MONITOR - XXDP V2.4 REVISION: D0 BOOTED FROM DL0 28KW OF MEMORY NON-UNIBUS SYSTEM RESTART ADDRESS: 152010 TYPE "H" FOR HELP But running UPDAT to create a new system image on the TU58 dies .R UPDAT UPDAT .BIC HALT instruction, PC: 000010 (000012) If I change the CPU to an 11/23 (but keep the same memory and other configuration) then UPDAT works. Is there some issue or limitation in running XXDP on a 11/03? Is it just UPDAT that doesn't work, or are there bigger problems? Thanks Bob

3 years

eBay sellers

by jnc＠mercury.lcs.mit.edu

I'm slightly amazed at how some eBay sellers react. Take this item: https://www.ebay.com/itm/154404969351 which the seller had listed as a 'PDP-8 PC05'. I sent the person a message pointing out that it was a PC04 (as shown by the 4 rocker switches, and the small backplane - PC05's have a larger one to hold more cards). They sent a nice peply, but didn't alter their listing! Well, I hope the bider really is a PDP-8 owner who wants a PC04... :-) Noel

3 years

Looking for video (or photos) depicting how to remove ASR 33 printer from keyboard

by billdegnan＠gmail.com

I am looking for a video or photos that show how one removes the printer >from the keyboard safely on an ASR 33. I need to get to the underside of the printer levers so I can re-align them. I am getting incorrect characters when I type over half of the keys. I can see that a few levers are out of whack or not seated correctly but I believe to get to them properly I need to put the printer on its side or under a lift to get to the underside. I am nervous about detaching the "H" shaped gizmo that connects the keyboard to the printer. Thanks Bill

3 years

Anyone know ancient versions of XLC?

by david4602＠gmail.com

On 4/12/21 1:00 PM, Liam Proven <lproven at gmail.com> wrote: >> AIX 3.2.5 was so much leaner and meaner than 4.x that came along next... >> I never did warm up to it the same way. > > Twas ever thus, no? A universal truth. > I remember an ad campaign for AIX when it was quite new... "We took > UNIX and added millions of lines of code to it." (Or words to that > effect.) To me and to a lot of other people, this did not sound like a > good thing... The ad campaign I remember was "A disciplined merge of System V and BSD" This looks relevant, from 1989: https://technologists.com/sauer/Convergence_of_AIX_and_4.3BSD.pdf

3 years

VCF Midwest 16 Date Announcement

by silent700＠gmail.com

Hello computer friends - all of us down in VCF Midwest Planning Bunker have decided: VCFMW16 planning must commence! To not do so would surely set up for failure, if and when conditions continue their current upward trend and we get the OK to gather again in unlimited numbers. So...we're going to have a show! Our schedule this year will be the same weekend as in 2019, with the dates this year falling on the 11th and 12th of September. Same location as well, at Waterford Banquets (and Clarion Inn), Elmhurst, Illinois. See our full announcement here: http://vcfmw.org/announce. And fill out the linked survey if you'd like. Still much to do - room block reservation, improved table layout planning, speaker recruitment....and that dang T-shirt. We hope everyone who is able to travel in September will consider paying us a visit. More news to come - check our newly re-themed website for updates as they occur! http://vcfmw.org -jt

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test-drb April 2021