test-drb November 2016

test-drb@ccmp.vtda.org

165 participants
224 discussions

by jules.richardson99＠gmail.com

So I'm working my way (more slowly than I probably should be) through my systems, ditching ancient on-board batteries before they leak... In the case of the Mac SE's, are there any critical settings which I should make a note of before removing the on-board battery? Should I expect any issues trying to run the machines without? (I'm not inclined to replace batteries unless I have to, just so I don't have to worry about replacement again in x years time) cheers Jules

9 years

DEC DELQA - seems not to work. Anyone got a spare? [SOLVED]

by jzatar2＠illinois.edu

>On 2014-10-26 3:07 PM, Toby Thain wrote: >>* On 21/10/14 7:38 AM, Noel Chiappa wrote: *>>>* > From: Toby Thain *>>>>>>* > Looking to see what the internal self-test returns as an error *>>>* code *>>>* > (that can be done with console ODT, it doesn't need a program) is *>>>* > probably the first step in diagnosing. *>>>*... *>>* OK, after powerup, the bits of the VAR register (e/w/p 2000192c) are *>>* D800, i.e. the test result bits VAR12:10 are 1,1,0 - meaning RAM test *>>* failed. *> >Hi all, > >As an update to this project, I can report that the DELQA has been >repaired with four new static RAM chips, and now the MicroVAX II's >network is fully working (including netboot). > >Credit due to Joe Zatarski (joe_z) who did a beautiful job of >desoldering and putting sockets in for the four RAM chips. > >--Toby Glad to have helped :) Joe Zatarski >>>>* I must be doing something wrong running the test manually, though - *>>>>>>>* d/w/p 2000192c 2000 *>>>>* Just leaves 2000 in the VAR register, permanently. *>>>>* --Toby *>>>>>>>>>>* Noel *>>>>>>>

9 years

[ex-convex] Re: Fwd: Audio interview that mentions my Convex

by aswood＠t-online.de

A very interesting story. Now we do need detailed information, schematics, maintenance procedures and software for C1,C2,C38 as well for SPP systems. My SPP1600XA, which I used e.g. to heat my cellar stopped operation due to breaking the voltage limit using psu_util. @Camiel: would you like to swap one of your C1 for an X or S-Class? My S-Class is using 48 PA-Risc processors. Andreas > Am 07.11.2016 um 14:50 schrieb steve wallach <steve.wallach at gmail.com>: > > all correct > > actually the story goes as follows > > .he had his sabattical year coming. however, he would still go into his office to use the convex. > > .so i offered him a FREE return C1 (returned after an upgrade to a C2). he would have to pay for the maintenance and pay for the electrical system needed in his basement. > > .prof jameson is brilliant and people all over the world would come to visit him. during his sabattical they would come to his house and he delighted in showing them his OWN SUPERCOMPUTER in his basement. also after his sabbtaical finished. > > .we sold several systems based on his use of the convex. > > .when he presented papers, he always said, ?i ran these simulations on my own convex supercomputer in my basement?. we got an enormous amount of press and good will. > > > > --- > + Ex-Convex Mailing List, list at ex-convex.org, http://www.ex-convex.org/ > + To unsubscribe, send an email to leave-ex-convex at ex-convex.org > + To subscribe, send an email to join-ex-convex at ex-convex.org

9 years

Analogue monitor board repair

by witchy＠binarydinosaurs.co.uk

Folks, I think I know the answer to this before I even ask, and that answer will be 'got a schematic' to which the answer's 'no and I doubt one exists any more' but... My recent Executel addition has a 5" screen with associated analogue board that seems to be powered from a display chip I can't find any info on, and at least one of the adjustment potentiometers has suffered metal fatigue and broken: http://www.binarydinosaurs.co.uk/STCExecutelScreenPot.jpg http://www.binarydinosaurs.co.uk/STCExecutelAnalogueBoard.jpg http://www.binarydinosaurs.co.uk/STCExecutelDisplayChip.jpg I've replaced it with a seemingly common 10K modern part that I had in my spares box but it's unknown whether the display worked at all prior to it being put in very damp storage, also the rating of the failed pot isn't known but the capacitor next to it is 50V. I've also removed, checked and replaced out of spec capacitors, one of them was a 680nF 50V radial. I could only find a 63V PET version on cpc's website and did much reading on differing capacitor types, concluding that it SHOULD be OK. Power supply is known good because it's one of my working ones, the original is still dead. Hence the question - am I wasting my time without a schematic for this analogue board? Cheers! -- Adrian/Witchy Binary Dinosaurs creator/curator Www.binarydinosaurs.co.uk - the UK's biggest private home computer collection?

9 years

What hardware runs 2BSD (was Re: For sale 128K Core RAM Industrial PDP 11/40 Massbus System)

by ethan.dicks＠gmail.com

On Mon, Oct 31, 2016 at 11:11 AM, emanuel stiebler <emu at e-bbes.com> wrote: > On 2016-10-31 08:48, Ethan Dicks wrote: > >> One of the great recent updates was backporting the MSCP driver from >> 2.11 to 2.9. That opens up KDF11 MicroPDP-11s to running 2.9 with an >> RQDX3. Prior to that availability, one needed an RLV12 or other Qbus >> disk controller for that platform. > > I missed that :( About 15 years ago, Jonathan Engdahl backported the MSCP driver to 2.9BSD... > more details? First hit: http://home.windstream.net/engdahl/2_9bsd-mscp.htm -ethan

9 years

Altair, IMSAI, SWTPC, etc. for sale in Philly

by barythrin＠gmail.com

Out of curiosity and ignorance what's with the solder joints on the cards in the pictures? That orange color seems like it's everywhere around cold looking solder joints. ?Is that rust, some sort or protection, or acid corrosion? -------- Original message --------From: Mark G Thomas <Mark at Misty.com> Date: 10/31/16? I had the pleasure of visiting Rick yesterday. Please see below additional information about remaining items, with links to photos. Please contact Rick directly if interested. Original posting here: On Tue, Oct 18, 2016 at 08:44:39AM +0000, steven stengel wrote: > --------------------------------------------------------------- > *************? Contact Rick below if interested.? ************* > --------------------------------------------------------------- > Name: Rick Bunker > Contact: rick at bunker.us > Location: Jenkintown, PA??? 10/30/2016 Update:---------------------- > The Altair 8800, a very early one, 4-slot motherboard, 1K ram, ceramic CPU, > you will see: https://goo.gl/photos/3C1pzfwFoZ3koPgt9 >

9 years

DEC DELQA - seems not to work. Anyone got a spare? [SOLVED]

by toby＠telegraphics.com.au

On 2014-10-26 3:07 PM, Toby Thain wrote: > On 21/10/14 7:38 AM, Noel Chiappa wrote: >> > From: Toby Thain >> >> > Looking to see what the internal self-test returns as an error >> code >> > (that can be done with console ODT, it doesn't need a program) is >> > probably the first step in diagnosing. >>... > OK, after powerup, the bits of the VAR register (e/w/p 2000192c) are > D800, i.e. the test result bits VAR12:10 are 1,1,0 - meaning RAM test > failed. Hi all, As an update to this project, I can report that the DELQA has been repaired with four new static RAM chips, and now the MicroVAX II's network is fully working (including netboot). Credit due to Joe Zatarski (joe_z) who did a beautiful job of desoldering and putting sockets in for the four RAM chips. --Toby > > I must be doing something wrong running the test manually, though - > >>>> d/w/p 2000192c 2000 > > Just leaves 2000 in the VAR register, permanently. > > --Toby > > >> >> Noel >> > >

9 years

New email address

by ard.p850ug1＠gmail.com

My ISP (which I have used for 20-odd years) has decided to drop its e-mail service.... My new address (at least for the moment) is : ard.p850ug1 at gmail.com If any of you mail me privately, please use that from now on.... -tony

9 years

Tek 4051 with a 10 year old at the helm

by rdawson16＠hotmail.com

Here is my daughter Gina, I thought you guys would like, Tek is still exciting. Sure, we have lots of PC's around the house, but this is the first one that she is programming, and programming the 4051 creates a smile. Randy https://youtu.be/o0LiYkHG3iE

9 years

S/36 in Milwalkee

by seefriek＠gmail.com

Noticed this on Nekochan: http://forums.nekochan.net/viewtopic.php?f=4&t=16731198 No affiliation ----- Hi, I have an IBM 5360 with all of the manuals, cables, etc. The monitor is missing. There are boxes and boxes of manuals, modems, cables, etc. This is free for someone who wants to pickup in Milwaukee. This posting will be active for a week. If I do not have any takers, it is going to recycling. Thanks!

9 years

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test-drb November 2016