test-drb May 2019

test-drb@ccmp.vtda.org

149 participants
165 discussions

by jnc＠mercury.lcs.mit.edu

> From: Glen Slick > According to the M7270 LSI-11/2 Microcomputer Module User's Guid[e], > it uses BC1, BD1, BE1, BF1 for SCLK3 H, SWMIB18 H, SWMIB19 H, SWMIB20 H. Oh, thanks! I wonder how I missed that, looking at the prints? (The drawings have these nice dark arrowheads to indicate backplane connections.) I just visually blew past it, I guess. BH1 is also used there (for SWMIB21 H); and on the previous page, the STOP L output is on AE1, and MTOE L (whatever that is) can be fed from AK1. Not quite sure how a Q22 memory card causes the problem, electrically, since those lines are inputs on the memory card, so it's an input<->input connection (i.e. voltage sources in TTL), but obviously it does. And I also don't see why Q18 cards are a problem; BDAL16 and 17 are AC1 and AD1 respectively, which I don't see in the 'extra pins' list for the LSI-11/2. Oh well, not too important to track it down. Thanks again for catching my miss! Wow, it's been a loooong time since I worked with an LSI-11 - about 40 years! :-) Noel

5 years, 1 month

M7264 Troubleshooting

by jnc＠mercury.lcs.mit.edu

> From: Mister PDP Well, I verified that the LSI-11/2 should work in a Q22 backplane - in the sense that the only pins it tries to talk to are standard QBUS pins, and AF1/AH1 for SRUN. It doesn't drive BREF, which might cause issues in later QBUS systems. Although it's a different board from the LSI-11, it uses the same CPU chip set, so it should give us some useful comparison data. So after a certain amount of issues (see next), I got my LSI-11/2 working. (It doesn't seem to work with Q18 memory, such as the MSV11-D. Attempts to write 0 to memory from ODT wind up leaving the bits in the high byte set. I have no idea why - anyone have any ideas? With Q22 memory, the symptoms are even stranger; the system hangs with the 'run' light on - even with the HALT switch on! Luckily I had an MMV11, and it worked OK with that.) > I took a picture of the readouts for SRUN Odd. On the LSI-11/2, with the machine stopped, 'run' was off, and the output on AF1/AH1 was always high (i.e. not asserted). I don't have any guesses as to what the behaviour of yours is about. > Checking the BSYNC, it looks like there is life. It oscillates at > 58.605 KHz, and has wider peaks than the SRUN signal. The frequency is not as useful as plain timings - especially for signals which don't have a 50/50 duty cycle. For example, on the -11/2, while in the ODT console CSR read loop (below), BSYNC is asserted for 2.5 usec (which sounds about right for a complete read cycle), then off for 1.0 usec. Also, in the pictures, it's not clear which part of the cycle is asserted (which, on the QBUS, is 0V - i.e. inverted) and which is idle (~3V). Is this the actual bus signal we're seeing, with high being idle, zor on the other side of an inverting receiver? The image shows some timing numbers, but it's not clear that they mean. E.g. above, it says "4.00 usec" - but is that per division, the whole horizontal, what? Below, I see below "17.06 usec", and if that's the rising edge -> next rising edge interval, that sounds like a bus timeout is happening. > This signal does not respond to the Run/Halt switch being toggled, > but I would assume that to be normal Right; while in ODT the CPU is trying to read the console CSR, and so you should see BSYNC cycling. At this point, you might want to look at BRPLY, which will tell us if the console is responding to the read of the CSR. Also, I don't know if your /73 system has a KDJ11-A (dual width card, no onboard console) or a KDJ11-B (quad width card, onboard console); if the former, it might be worth swapping the DLV11 card into that system to see if _it_ is working. Noel

5 years, 1 month

Pleas ID this IBM system....

by couryhouse＠aol.com

I liked? raised? flooring....? ? ?you can? clean the room up? fast? by stashing? stuff in the non critical to airflow? areas!? ----see we? were? lucky? when? comshare? of an arbor? ? division on? phx? ? moved out? ?where? they? designed? IBM channel interfaces? for? xerox sigma 9s We? got their? space next to? us? ?and bought? their? their? flooring? rather? than them? shipping? back? to ann arbor Mich.? to put? our? HP? stuff on. best? thing? ever? did? ?it? kept? things neat, clean and? provided? xtra storage.? In a message dated 5/20/2019 9:11:04 AM US Mountain Standard Time, cctalk at classiccmp.org writes: > I guess it would look right for the era, but I'd never build a data center > with raised flooring after my experiences with them.? It's such a pain to > work with compared to a sealed concrete floor and overhead cable trays. But with a raised floor, you can whack the tile puller down in such a way that it makes an enormously loud pop that startles everyone in the datacenter! I cannot imagine difficult it would be to run S/360 era cables in overhead trays. Many are an inch or more in diameter. -- Will -- Will

5 years, 1 month

Raised Floor => was RE: Pleas ID this IBM system....

by dave.g4ugm＠gmail.com

-----Original Message----- > From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Chuck Guzis via > cctalk > Sent: 21 May 2019 22:33 > To: Grant Taylor via cctalk <cctalk at classiccmp.org> > Subject: Re: Pleas ID this IBM system.... > > On 5/21/19 1:17 PM, Grant Taylor via cctalk wrote: > > > I'm sure that was /a/ problem. But I'm not comfortable attributing > > that problem to the raised floor. > > > > I expect that the same problem would be effected by an elevator that > > doesn't stop perfectly level with the floor, or has too wide a gap > > between the car and the floor, or even on tiled floor. > > > > That really seems to me like it's a sub-optimal design, pushed past > > it's operating parameters by overloading it. > > > > I can't fault the raised floor for that problem. > > No, but it's just one of the anecdotes that go with the terrain, like leaving a > box or two of cards or a stack of tapes or your dinner on top of a 1403N1 > when it ran out of forms.. > > How well sealed were the raised floors? I ask this because i recall an episode > or two where a disk drive would spring a leak and make a beautiful slippery > pool on the floor, just waiting for the next operator to dash by. I always > wondered how much of the stuff made it to the subfloor. > I think the joints were often tight. Otherwise you got drafts or a breeze. Speaking of breezes, we found our plotter ( kept over-heating.) Some one kept closing the floor vent. We eventually found it was the plotter operator who was a young lady with a short skirt. When loading the mag tape with the plots she had to stand over the vent which blew out cold air, So she closed the vent..... ... it took some tact to get this info, and we then moved the tile with the vent and the plotter stayed cool... At another place we had a disk drive drop through a tile. We had had the joiners make some temporary tiles while we were having an upgrade. The ran out of plywood and joined two scraps, but not very well. The rocking of the drive broke the joint and the drive fell through. We were surprised it kept working without a head crash.... > --Chuck Dave

5 years, 1 month

apollo psa test point adaptor

by carlclaunch51＠gmail.com

On 05/19/2019 09:46 AM, Jon Elson via cctalk wrote: > There's a switch labeled "IRIG" which stands for Inter Range > Instrumentation Group, and refers to a standard for > telemetry encoding. There is a standard for time code, a > standard for modulating analog signas onto a bunch of FM > carriers, and a standard for multiplexing several analog > signals onto one FM carrier. In this case IRIG stands for Inertial Reference Integrating Gyroscope, one of three inside the Intertial Measurement Unit of the spacecraft. This adapter is used to test the PSA tray (Power Sub Assembly) which had modules such as the Coarse Alignment Amplifiers that were used to drive and measure the gryos (and the accelerometers). It also drives the sextant optics for star sighting in the CM (thus you see the knobs labeled Sxt Shaft and Sxt Trun) Those same circutis would be used with the Rendezvous Radar for the PSA installed in a LM. > Apollo documents are probably VERY hard to come by these days. They are being rapidly and steadily digitized and made available. Many of the PSA schematics are now accessible. The test point adapter itself is not going to be easy to find, but you can find the wiring harness schematics that would tell you what each of your 91 leads in the connector does. Carl

5 years, 1 month

Things to do in Australia & New Zealand?

by pat＠vax11.net

I'm going to be in Australia and then New Zealand for most of June, and was wondering if there was anything interesting classic computer wise to visit? I'm planning on being in Sydney for the Australia half of the trip, and haven't made many plans for New Zealand yet besides flying in/out of Auckland. Pat

5 years, 1 month

PDP-11 Rack

by useddec＠gmail.com

Hi Thomas, I tried to call but couldn't reach you. I think I can have it picked up before then, but have a few questions. Thanks, Paul 217 766 7690

5 years, 1 month

PDP-11 Rack For Sale

by tsraguso＠gmail.com

I have an empty PDP-11 rack that must be gone by Thursday, 5/30. I am asking $90 OBO. I also have a UNIBUS SMD disk controller (asking 150). I will ship the controller, but not the rack. I am located in Houston, TX. Thomas Raguso 832 374-2803

5 years, 1 month

Available: Wang 370 book

by anders＠abc80.net

Hi, I got a stash of documentation yesterday. Found a book "WANG 370 calculating system, program library volume 1" which I don't have any use for. Looks to be almost unread, it has become a bit yellow and it has a small sticker on the front page. Printed in 1968. Is there anybody that want's it (free pickup in south Sweden or for postage fee)? /Anders

5 years, 1 month

HP-01 calc watch go withs - brochures, t- shirts, booklets, ad copy who else collecting?

by couryhouse＠aol.com

OK ?Marc.. guess, ?patent ran out. this was eons ago I was involved initally... ?so thus my dated ?"who had and not ?list"... remember the leitz episcopic.. ? phase contrast? system... ighhh...!, ?have,an otholux set up like that... another fun one is the Wild m20 ?with episcopic... bright field AND darkfield. Marc .. yes... as u said....Nomarski microscopy, is Differential phase contrast microscopy. Makes very small height differences (partial wavelength) on mostly planar objects pop out, and creates amazing color effect.... ?the francon yamotto method seems simular in images,and colors... ? -----Original Message----- From: Curious Marc <curiousmarc3 at gmail.com> To: COURYHOUSE at aol.com <couryhouse at aol.com>; cctalk at classiccmp.org <cctalk at classiccmp.org>; spacewar <spacewar at gmail.com> Sent: Mon, May 20, 2019 10:36 PM Subject: Re: HP-01 calc watch go withs - brochures, t- shirts, booklets, ad copy who else collecting? #yiv6703816687 #yiv6703816687 -- _filtered #yiv6703816687 {panose-1:2 4 5 3 5 4 6 3 2 4;} _filtered #yiv6703816687 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;} #yiv6703816687 #yiv6703816687 p.yiv6703816687MsoNormal, #yiv6703816687 li.yiv6703816687MsoNormal, #yiv6703816687 div.yiv6703816687MsoNormal {margin:0in;margin-bottom:.0001pt;font-size:11.0pt;font-family:sans-serif;} #yiv6703816687 a:link, #yiv6703816687 span.yiv6703816687MsoHyperlink {color:blue;text-decoration:underline;} #yiv6703816687 a:visited, #yiv6703816687 span.yiv6703816687MsoHyperlinkFollowed {color:purple;text-decoration:underline;} #yiv6703816687 p.yiv6703816687msonormal0, #yiv6703816687 li.yiv6703816687msonormal0, #yiv6703816687 div.yiv6703816687msonormal0 {margin-right:0in;margin-left:0in;font-size:11.0pt;font-family:sans-serif;} #yiv6703816687 span.yiv6703816687EmailStyle18 {font-family:sans-serif;color:windowtext;} #yiv6703816687 .yiv6703816687MsoChpDefault {font-size:10.0pt;} _filtered #yiv6703816687 {margin:1.0in 1.0in 1.0in 1.0in;} #yiv6703816687 div.yiv6703816687WordSection1 {} #yiv6703816687 Nomarski microscopy, Ed. Differential phase contrast microscopy. Makes very small height differences (partial wavelength) on mostly planar objects pop out, and creates amazing color effects as a biproduct. Pretty much a stalwart of any good cleanroom microscope. Every manufacturer offers it, usually a pretty expensive option as all your optics have to be stress-free. I dream to own one of these one day. Marc ? From: cctalk <cctalk-bounces at classiccmp.org> on behalf of "cctalk at classiccmp.org" <cctalk at classiccmp.org> Reply-To: "COURYHOUSE at aol.com" <couryhouse at aol.com>, "cctalk at classiccmp.org" <cctalk at classiccmp.org> Date: Monday, May 20, 2019 at 11:20 AM To: "COURYHOUSE at aol.com" <couryhouse at aol.com>, <spacewar at gmail.com>, "cctalk at classiccmp.org" <cctalk at classiccmp.org> Subject: Re: HP-01 calc watch go withs - brochures, t- shirts, booklets, ad copy who else collecting? ? should? say ?Francion Yamamotto? ?not ?Yrancion Yamamotto? ? ? In a message dated 5/20/2019 10:07:04 AM US Mountain Standard Time, couryhouse at aol.com writes: Since? we? have? nice? microscopes at? the museum? project? we? were? hired? to? photo? some IC? innards? years? back. This? ended? up? becoming? a minor obsession? for? a short? time? as? the? artwork under? various? illuminations? is? fantastic.?? ? ? One of the things? that? seemed? to show the mots? difference in? detail between layers and highs? etc... was? differential? interference contrast? (after? nomorski (sp?) ( this? was on our? Ziess Ultraphot? and? seems? to be? a Zeiss? only? ? offering.0? ?on? the? Japanese? side of? things? Nikon? had? ?Yrancion Yamamotto (sp?)? method? which? seems? ?nice? ? but? I? preferred? the? ?Nomeriski. Using? these? ?methods? you? may be? able? to extract? more usable? detail? ?than? with traditional methods.? ?and? wow? the? color? photos? are? ?frame-able! But? ?kinda? what? I? wanted to mention? to is? depending? on? what? era? ?the chips? were? the? over? coatings? ? seemed? to? worsen? the view? the newer the chip? or? so? I? thought at the? time. ? ? ? Such? great? ?fun? to? photo? ?the? little? ic innards!? ?even? a? standard? ?illum.? ?scope? with the? vertical? episcopic? illumination? gives? ?some? ? fun? photos? too,? especially? on the? earlier? ?chips. ? Don't? know? if? any? of? ?this? will help on the? HP-01? roms? but? sure? was? fun to talk about? again ed sharpe archivist for? smecc ? ? ? ? ? In a message dated 5/20/2019 9:00:09 AM US Mountain Standard Time, spacewar at gmail.com writes: Only just within the last month I finally obtained a ROM dump from a production HP-01, for potential use in my Nonpareil simulator. Previously I only had the preproduction code listed in a US patent. I'm not sure when I'll have time to actually work on the simulation, though. My original plan had been to crack open an HP-01 module and try to read the ROM bits optically, as Peter Monta did for the HP-35. However, that didn't work, probably due to a passivation coating on the ROM dies. ?

5 years, 1 month

← Newer
1
...
4
5
6
7
8
9
10
...
17
Older →

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb May 2019