test-drb

test-drb@ccmp.vtda.org

101090 discussions

Start a nNew thread

What happened to control-data.info and controlfreaks.org?

by jim＠deitygraveyard.com

Is anybody able to access these sites? I just get redirected to Google. Jim

3 years, 11 months

Looking for someone in London (UK) to read 2 9 track tapes

by cclist＠sydex.com

Hey list, I received a note today from a fellow in London who has 2 9-track tapes that he'd like read. Brands are CDC and BASF, so media shedding should not be a problem. Dates are '92 and '93, so likely 1600 or 6259. The tape seal on one (the other has no seal) is IBM-style, which may be the system that produced the tapes. Any takers? Let me know if so, I'll put you in contact and you can take things from there. All the best, --Chuck

3 years, 11 months

PDP-11/70 Boards

by jnc＠mercury.lcs.mit.edu

> From: Guy Sotomayor > I don't unfortunately have any light masks Dave Bridgham and I were manoeuvreing to be able to produce clones of the one you loaned me (he has access to a computer-controlled milling machine at his maker-space or whatever the name is for them now, and we bought a good-sized sheet of the required plastic to be able to crank them out) when I came down with COVID early in the pendemic, and in the aftermath (I came down with long-haul post-COVID Chronic Fatigue Syndrome) itgot put on hold. The loaner, and a micrometer to measure it, are still siting on the table in my family room, next to my desktop. If anybody needs some, I can probably try finishing the drawing, and get it to Dave, so we can resume that project. Noel

3 years, 11 months

PDP-11/70 Boards

by jnc＠mercury.lcs.mit.edu

> From: Ed Cross > I'm currently restoring a PDP-11/70 system and need the following > boards to complete the CPU: FP11-C >From your mention of the FP11-C, I gather your -11/70 has a KB11-C (later) CPU, not the KB11-B CPU of the earlier PDP-11/70's (prior to 1976 - the difference between the two was whether they took the optional FP11-B or FP11-C FPP). Not that it makes a big difference in your case; the 4 cache cards are the same in both. There used to be a seller on eBait (on the mid-East Coast - Baltimore, IIRC) who was selling -11/70 CPU cards (I bought a whole spare set from him) but alas he seems to have gone away (or sold them all; a quick search, both on eBait, and in my email, didn't turm him up; I can institute a deeper search if need be). >From the blog of someone who got a KB11-A working, you'll really need KM11 cards; dunno if Guy Steele still has those clones he was selling. There are definitely some versions of Unix which will run fine on -11/70's without the FP11 (e.g. V6). The system binary is different for the with/without versions, though: in the assembler code which saves the state of one process before switching to another, there is code like: stfps (r1)+ which will probably get an illegal instruction trap in kernel mode on a machine with no FP11, and is therefore conditionally assembled (depending on if the particular machine the system is being built for has an FP11). Perhaps the later BSD versions look for the FP11 on startup, and adjust their behaviour appropriately, but I'm not familiar with them. V6 as distributed contains system binary for an -11/40, which will run on _any_ -11 UNIX will run on, and can be used to build appropriate system binary. (Diversion: I've never found out whether the KB11-B and KB11-C of the -11/70 used/could use the same backplane or not. By examining the prints for the boards of the FP11-B and FP11-C, and seeing on which pins they exchanged signals, and what signals they exchanged with the rest of the CPU, and on which pins, it should be possible to work it out. Ditto for the M8133 ROM and ROM Control of the KB11-B, replaced with the M8123 in the KB11-C.) (Interesting factoid: the M8123 is the only card shared between any variant of the -11/45 and -11/70: both the KB11-C and KB11-D use it. Of course, I think we're still missing a wirelist for the -11/70 backplane, of any variant; and the ECO history. There appears to have been at least one poorly documented upgrade; see here: http://gunkies.org/wiki/MK11_memory_system#CSR_Access for more.) Noel

3 years, 11 months

Looking for tips debugging DEC TC01 controller

by derschjo＠gmail.com

Hey all -- I picked up a TC01 in trade (for a TC08) a couple of weeks back and this past weekend I got it hooked up and powered up with my PDP-8/I + TU55 transport. I've been debugging it and have solved a couple of issues but the current one has me stumped and I'm looking for advice, hoping I overlooked something obvious. At this point the PDP-8/I can talk to the TC01 and use it to control the TU55 without issue. I've mostly been using MAINDEC-08-D3BB to exercise the hardware (see: http://svn.so-much-stuff.com/svn/trunk/pdp8/src/dec/maindec-08-d3b/maindec-…) and issuing FWD/BACK commands via the "Basic Motion" routine the tape runs >from one end of the tape to the other, stopping at the endzones correctly. The tape comes up to speed properly, the COUNTER register increments, and in general the various status lights on the panel do what I expect them to do. The root symptom I'm seeing now is that DECtape operations (like SEARCH) don't complete, and I've traced this back to the MK BLK MK signal not getting asserted. This signal is generated by a large AND gate (see p. 112 of http://bitsavers.trailing-edge.com/pdf/dec/dectape/tc01/DEC-08-I2AB-D_TC01_…). This gate ANDs together a pile of signals from the WINDOW register and the counter, looking for a specific bit pattern on the mark tracks; this AND gate is never satisfied because the WINDOW register's MSB (W1) is stuck low. On the scope it's a completely flat line, no glitches or anything noticeable. Despite my best efforts I cannot figure out why this is. Here's what I've looked at and what I've discovered thus far: 1) The inputs to the W1 flip-flop (pins U (clock) and V (data) look to be correct -- U is identical to the TP1 signal being passed to all the other flip-flops in the chain, and V is identical to the data coming out of W2 -- levels all look fine. 2) The outputs of W1 (pins T and S) are not being pulled up or down by anything external. I've gone so far as to completely disconnect T and S >from the backplane (with some tape over the card fingers) and the outputs are still a flat line. 3) The output of pin T goes to -3V when 0->WINDOW is de-asserted (when tape is in motion), returns to 0V when 0->WINDOW is asserted after the tape stops. (S is the inverse of this, as expected.) (As an aside, the schematic drawing suggests that 0->WINDOW ought to be a pulse given the arrow symbol; this does not appear to be the case. Other flip flops in the chain seem to behave properly, regardless...) 4) The backplane connection to the R203 flip-chip that the W1 flip-flop is on is fine. I've beeped this out and there's no significant resistance between the backplane pins and the connection to the card in the slot. 5) W1 is not affected by the state of the two other flip flops on the R203 (also tested by disconnecting all pins other than power/gnd and pins R/S/T/U/V with tape). 6) Swapping in a different, working R203 shows no change in behavior. 6) Sometimes, randomly, W1 starts working. Last night I noticed that the solder side of R203 was rubbing against the top of the "flip chip" packages on the R107 next to it and even though those shouldn't be conductive, I stuck a piece of cardstock between the two. W1 started working! I tested things for about a half hour in this state (interrupts were still not occurring, much to my annoyance) and this morning I powered it up and it was still working. Pulled the cardstock out and W1 stopped working; this would seem to causation. Put the cardstock back in... still won't work. Backplane connections all test out fine (see (4) above). Put the R203 on an extender (to completely avoid interference with neighboring cards) and still no go. Possibly the insertion of the cardstock flexed the board or the connection with the backplane slot ever so slightly to make things work but if so I've been unable to replicate it. All of this still sounds like a bad connection somewhere (backplane, cold solder joint, broken trace) but the evidence seems to be against it (checked, double-checked, triple-checked backplane, swapped R203s around, etc...) Anyone have suggestions? I'm going to start looking at things on the board itself (which is going to be a pain given how things are currently arranged in the chassis) but curious if I've missed anything here... - Josh

3 years, 11 months

Datapoint 2200 on ebay

by sieler＠allegro.com

Noticed a Datapoint 2200 on ebay.... https://www.ebay.com/itm/275043446827 They're asking $48,000 I want one...but not for that price! :)

3 years, 11 months

PDP-11/70 Boards

by edcross＠gmail.com

Dear list, I'm currently restoring a PDP-11/70 system and need the following boards to complete the CPU: FP11-C slots: M8127 M8128 M8129 Cache slots: M8142 M8143 M8144 M8145 Any help finding these is appreciated. Thanks.

3 years, 11 months

3483 + LCD

by ben＠huntsmans.net

Hi guys- Anyone on here have any experience using an IBM 3483 terminal with an LCD? I have an IBM 15" LCD I am hooking up to it, but parts of the image are below and above the viewable area of the display, and the characters look all garbled or like they're missing some lines. Auto-adjust makes it all visible for a short second, and then it pops back to the way it was. I'd seen at least one other mention of this on the internet, but was wondering if anyone knew of any specific LCD's that are known to work with the 3483. Thanks in advance! -Ben

3 years, 11 months

Interesting emulex manuals. Keep, scan, or junk?

by cz＠alembic.crystel.com

Have some original Emulex manuals. Need space do people want them or trash? tc0551001 TC05 controller manual. I have Rev C, bitsavers has F pd9951002 I have Rev A Bitsavers site has rev D px9951902 Diagnostic distribution kit I have Rev E and H sc0351001 SC03/B1 technical manual. Bitsavers doesn't have sc0251001 SC02/A RP02/03 manual Rev H Bitsavers doesn't have I'll scan the SC03/B1 and SC02/A manuals, but does anyone want the rest? C

3 years, 11 months

What happened to control-data.info and controlfreaks.org?

by petermallan＠gmail.com

On 11/81/21,. Andrew Warkentin via cctalk <cctalk at classiccomp.org> wrote: >> What happened? Looking back at my emails, the list was operating normally >> until September 3. Then it just stopped. There were normal discussions >> going on. There was no flood of spam. As far as I can tell, nothing occured >> that would trigger a rage quit. >> >> Is the software and documentation that was on the site at least archived >> elsewhere? Has anybody downloaded it and can maybe upload to archive.org? >> >> Mike >> > I downloaded some of the software and documentation from there a long > time ago and still have it, although I didn't actually scrape the > entire site. I can upload what I've got to archive.org. > > The disk image kit of NOS 2.8.7 with CYBIS has been mirrored at > <https://codex.sjzoppi.com/doku.php?id=utilities:start> and most of > the documentation for it is available from the Wayback Machine at > < http://web.archive.org/web/20210421202420/http://www.control-data.info/Cybi… > I have a working version of NOS 2.8.1, but I would like to be able to add software that is not included as part of the system that I downloaded from controlfreaks.org about 18 months ago. An example might be the ALGOL68 compiler. (I stress 'might be', as I haven't checked if that is on my system already. I just know there is 'some good stuff' that I want and which I don't have.) I have had a look on archive.org, but I can't find anything that looks like CDC NOS software tapes. A big part of my difficulty is likely to be that I don't have a list of what was available on controlfreaks.org in order to be able to do a detailed search. I did search archive.org for controlfreaks.org, but all I get is Controlfreaks.orgAuthorized Users Only This site is for the research into historic systems and software made by Control Data Corporation. If you think you can contribute, email to ControlfreaksAdmin <https://web.archive.org/web/20210421192919/mailto:thunter0512 at gmail.com> to request a username/password for access to this site. All the content is over in the TWiki <https://web.archive.org/web/20210421192919/http://www.controlfreaks.org/twi…> . When I click on the TWiki link, I get {ScriptUrlPath}/view/TWiki/TWikiRegistration which is not much use. Does anyone have a list of the CDC software that was available from controlfreaks.org? Cheers Peter Allan

3 years, 11 months

Jump to page:

2025

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