December 2014 - test-drb@ccmp.vtda.org

by sales＠elecplus.com

Mainframes and other stuff Recycle center in NC is willing to save out "stuff" for people. No, no one can go in the back and scrounge. No, he does not want a lot of emails from people. Yes, he gets big blue and orange and beige 6 foot tall OLD mainframes in all the time. They squash them at the moment. Yes, he will package small orders, and will properly palletize larger orders. Local pick up will be available after the new year. So, if u can send me a picture with description and some part numbers, along with what you want to pay, I will consolidate things and make arrangements. Please don't ask for specific boards from DEC; they don't want to go into that much detail. QBUS will mean nothing to him. Big orange cabinet that says xxxxx is much more likely to get saved. They are moving to new warehouse 1st of the month, so all this will start happening after the 1st of the year. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-792-3400 phone 830-792-3404 fax sales at elecplus.com AOL IM elcpls

7 years, 3 months

24
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TU58 tape formatter (was Re: rebuilding DC100A cartridges?)

by shadoooo＠gmail.com

Hello. I have a VAX730 with both TU58 drives destroyed (capstan melted, need replacements). I also have a bunch of cassettes, but unfortunately all seem to have problems with the bend and/or bad spots on the tape. Possibly I would try to replace the broken bands (if I find a source) and/or replace the magnetic tape when damaged (I was thinking to try with audio cassette tape, don' t know if metal oxide high density tape could be good for it). Anybody has some information about the coercivity of original DEC TU58 tape? One problem indeed is the need of reformatting the tape, but: if I can emulate the TU58 drive using a serial, would it be possible to send raw commands to the drive using the serial and a PC? Andrea PS-If possible, some good-condition cassette would be very useful to me too. I'm located in Italy.

7 years, 6 months

14
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Jobs, McGowan and Olsen

by dm561＠torfree.net

An interesting 3 hours on PBS last night: - 'Steve Jobs - One Last Thing': No description necessary. - 'Long Distance Warrior': McGowan/MCI's David & Goliath battle with AT&T and disastrous merger with Worldcom. - 'Digital Man/Digital World': Ken Olsen/DEC's growth and ultimate decline. (No doubt everyone here except myself had already seen this one ;-) Interesting comparison of the different styles and personalities of three men who profoundly influenced the tech world of today and their companies. Thoroughly enjoyed it. m

8 years, 1 month

3
2
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Does anyone have docs for a Ventel brand MD212-plus modem?

by ethan.dicks＠gmail.com

Hi, All, A friend of mine just returned a modem he got from me decades ago, a Ventel MD212-plus. It's an early-1980s non-AT-command-set autodialling modem. The settings are adjusted via a pair of 10-pin DIP switches accessible from the back. I've checked the web and bitsavers. So far, all I've found is some old Usenet articles and a couple of pictures, but no manual or jumper guide. One "feature" is that it lacks a modular jack to plug into the phone system. Fortunately, my friend kept the proprietary DA15 cable. I've never seen that choice of connectors on any other modem. Does anyone have any Ventel docs? Thanks, -ethan

9 years, 4 months

1
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Digital archiving tools

by wmaddox＠pacbell.net

Many of us maintain large collections of bits that we'd like to preserve over a long time, and distribute, replicate, and migrate via unreliable storage media and networks. As disk sizes (and archive sizes) have increased, the probability of corruption undetected or uncorrected by the mechanisms normally built into disk drives, network protocols, and filesystems has increased to a level that warrants great concern. I would be interested to know if there exists an archive format that has the following desirable properties: 1) It is well-documented, and relatively simple, to facilitate its implementation on many platforms present and future. 2) It supports some degree of incremental updating, but need not be particularly efficient about it. An explicit compaction operation is preferable to an overly complex format. It is adequate to use append-only strategies appropriate for write-once media. 3) Insertion and extraction of files, copying of the archives, and other archive-manipulation utilities support end-to-end verification that identical bits have been stably recorded to the media, bypassing or defeating platform-level or hardware-level caching mechanisms. Where this is not possible, the limits must be carefully delineated, with some basis for determining the properties of the platform and certifying reliability properties where possible. 4) The format should provide for superior error detection capability, designed to avoid common failure modes with mechanisms typically used in hardware. For example, use a document-level cryptographic checksum rather than a block-level CRC. 5) The format should include a high degree of internal redundancy and recoverability, say, along the lines of a virtual RAID-array. Just as biological organisms constantly correct DNA transcription errors, the idea is to have a format that is robust across long-term exposure to imperfect copying and transmission channels. Does anything like this exist? --Bill

9 years, 7 months

4
7
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Scraping DEC Equipment

by dm561＠torfree.net

----- Original Message ----- > Date: Sun, 22 May 2011 22:56:32 -0500 > From: Daniel Seagraves <dseagrav at lunar-tokyo.net> > Subject: Re: Scraping DEC Equipment > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <C7A98127-DFF4-41B1-A6AF-5DFCA234D286 at lunar-tokyo.net> > Content-Type: text/plain; charset=us-ascii > > I need a tractor feed assembly for a LA100, are the ones on the 120 > compatible? ----- Reply: Apparently not, but I might have one for an LA100. mike

10 years

36
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Tektronix 4404 servcie manuals needed

by g-wright＠att.net

I would like to get a Tek 4404 computer going but lack any service manuals. The system turns on but has no curser on the screen. Has good power from the Power supply and heater is on in the CRT. Has a row of LEDs on the mother board. Does anyone know how to read these. - Thanks, Jerry

10 years

3
9
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Servant .953

by roger.holmes＠microspot.co.uk

On 7 May 2010, at 08:25, cctalk-request at classiccmp.org wrote: > > Message: 2 > Date: Thu, 06 May 2010 16:06:37 -0700 > From: Al Kossow <aek at bitsavers.org> > Subject: Re: Servant .953 > To: cctalk at classiccmp.org > Message-ID: <4BE34B7D.6060902 at bitsavers.org> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 5/6/10 2:23 PM, Fred Cisin wrote: >>> Al Kossow wrote: >>>> I am interviewing Andy Hertzfeld tomorrow, and had hoped to talk about >>>> Servant, but I can't find a copy of it around anywhere tonight. > > A huge thank you to Nigel Williams who forwarded a working copy of .951 five > minutes before Bill and Andy arrived. We spent an hour talking about MacPaint > and Quickdraw (Apple has finally given CHM approval to make the sources available) > then another hour on Alice, Dali Clock, Servant, Hypercard, and Magic Cap. Could you please clarify, the QuickDraw source is available for what purpose? Could developers modify it any include it in heir commercial 64 bit Intel applications for instance? Is the source Pascal, Assembler, C or something else? Roger Holmes, Director of Microspot who has a Carbon application which compiles with over 10,000 warnings about deprecated QuickDraw calls.

10 years

4
5
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websites on the classiccmp server

by jwest＠classiccmp.org

10 years, 2 months

2
1
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Any word on the Multics revival front?

by madcrow.maxwell＠gmail.com

When Multics was officially released as free software a couple of years ago, there was a flurry of activity aimed at getting some sort of emulator up and running to run it. Did anything ever come of that or did folks just lose interest (or find out that the needed GE/Honeywell hardware was too poorly-documented to write an emulator of) Mike

10 years, 2 months

8
13
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TSX Plus...

by lbickley＠bickleywest.com

After stating that I expected TSX Plus to be available generally to the collector community this week, I have had a number of folks request access to TSX plus via private FTP. Please be a bit patient and wait for me to post it to a new website I'm in the process of creating. I now have full agreement from S&H to generally release TSX Plus, COBOL, etc., to the collector community via a simple download. BTW: I have converted all of the original documentation, which was in HP print file format to PDFs for easier and more general use. Over time I will likely be able to release some of the utilities, etc. that S&H used internally with TSX plus. Some time ago S&H gave me all of their RL02 packs and a SMD drive with everything they had related to the PDP-11 version of TSX. (They have a current version of TSX for X86 systems which is NOT free and is NOT part of this release). Over time, there may be a project to scan the source listings and recreate TSX Plus source code. (The source listings are available on bitsavers.org (pdf/dec/pdp11/tsxPlus/listings/). Unfortunately, we are missing the MACRO definitions in the source listings. Some of us are working on that issue. (Note: All of the original PDP-11 source code was accidentally lost by S&H). I will also make available any software that other folks submit to me related to TSX on my website. Regards. Lyle -- Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"

10 years, 9 months

7
15
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docs or software for Quay 900 (uses Quay 90F/MPS board)

by spacewar＠gmail.com

Does anyone happen to have documentation, schematics, or software for the Quay 900? It's a system based on the Quay 90F/MPS single-board Z80 computer and two MPI double-sided 8-inch floppy drives. The drives are MPI part no. 77618022, apparently a 9406 variant but not listed in the drive manual on Bitsavers. I suspect the pinout is close to the SA800/850 pinout (industry standard), but I was surprised to find that none of the variants in the 9406 manual have a pinout similar to that.

10 years, 9 months

3
16
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EPROM image for Xylogics 472 (multibus Pertec controller)?

by earl＠baugh.org

> > On Dec 17, 2014, at 7:35 AM, Al Kossow wrote: > > > I should have one, somewhere.. Bear or Earl probably have one as well. > > Apparently I don't have an XY472, or at least one doesn't show in > inventory. I was totally ready to jump in and save the day, too! > > ok > bear. I'll try to check tonight when I get home... spreadsheet says I have 8 Xylogics SMD controllers... have to see if any is an XY472. Earl the Squirrel

10 years, 10 months

5
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Data General Nova 3/12 and 6026 Tape Drive on craigslist

by tommie＠fox.se

Data General Nova 3/12 and 6026 Tape Drive in Tucson, AZ on Craigslist https://tucson.craigslist.org/sys/4591315871.html /Tommie My Data General stuff: http://www.datageneral.org/

11 years

2
1
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Source for IBM logic probe tips

by h.j.stegeman＠hccnet.nl

Hi, Who can help me with a source (not IBM) for logic probe tips used with IBM MST and SLT backplanes. See: http://home.hccnet.nl/h.j.stegeman/IBM_logic_probes.jpg Prefably the lower one (P/N 453826). Thanks for your replies. Regards Henk

11 years, 2 months

26
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Ceiling Apples

by terry＠webweavers.co.nz

An account of a small vintage computer rescue. Not uncommon machines but I'm glad I saved them from the scrapheap. http://www.classic-computers.org.nz/blog/2014-12-23-xmas-apple-salvage.htm

11 years, 3 months

5
5
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PDP-8fest @ VCF East?

by evan＠snarc.net

Here's something you do not see every day. There are four people interested in bringing a variant of PDP-8 to VCF East next spring (April 17-19). On the PDP-8 front, so far only David Gesswein is registered; others will be soon. It would be very cool if there were LOTS of PDP-8 computers at the show, in honor of the original Straight-8's 50th anniversary. (We invited Gordon Bell, who said he's unable to attend that weekend. Darn.) So: if you've got a PDP-8 of any flavor, and you've always dreamed of showing it off and/or attending a VCF, now's your chance. Paging all the California and Boston people!!!! :) Overall exhibits so far are here: http://www.vintage.org/2015/east/exhibit.php -- we're expecting 30 or so by April. There will also be a dozen or more technical classes on Friday, April 17. So far only one is posted, but we've got most of the others almost determined, and those will be posted soon. Keynoters for the weekend are Ted Nelson (Saturday) and Bob Frankston (Sunday).

11 years, 3 months

4
8
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PDP-8/M restoration project

by blstuart＠bellsouth.net

For any of you who are on more than one of these lists, I apologize in advance for your getting multiple copies of this. Now that I'm moved into the new place and the man cave (my basement) is converging on a usable state and in recognition of the upcoming 50th anniversary of the introduction of the PDP-8, I'm about to embark on a project to restore a PDP-8/M I got a while back. Unfortunately, this one is somewhat incomplete.. So I'm looking to start collecting some of the bits I'll need before it's all said and done. The items I need are in descending order of priority: KK8E M8320 Bus load module KL8E M8650 Async module H851 Inter-module jumper blocks for the CPU boards Memory Storage device and controller Power switch key One front panel switch paddle If you have any of those that you're looking to unload (especially the M8320 or the M8650), let me know. Obviously, I can live without the switch paddle and I should be able to get a new key cut, but if anyone has extras lying around, I promise to give them a good home. The truth is I don't expect to come up with memory or storage devices for what I can justify spending. However, it turns out I do have an Omnibus prototype board. So I'm planning to use that to build a device to emulate a set of RK05s using an SD card for storage, and if need be, I can put memory on there too. Thanks in advance, BLS

11 years, 3 months

5
7
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ab20 archive

by jfoust＠threedee.com

At 08:56 AM 8/11/2014, Jason Scott wrote: >I'll work on finding and getting them on archive.org! > > >On Mon, Aug 11, 2014 at 4:59 AM, Jacob Dahl Pind <rachael at telefisk.org> >wrote: > >> >> Does anyone by change have either of the following walnut creek cdrom, >> >> AB20 Amiga CD-ROM >> Aminet CD-ROM disc, 6/93 , ( note this is not part of the aminet cds from >> Urban D. Mueller) I bet I have them both; the trick would be finding them. - John

11 years, 3 months

2
2
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Replacement for Google's broken Usenet group search

by aek＠bitsavers.org

They seem to have broken it sufficiently now that nothing is returned after the end of October. Is there anyone indexing Usenet that has a clue? It seems like all that is left is for-pay services for searching alt.binaries.

11 years, 3 months

6
6
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olivetti programma 101 repair

by simski＠dds.nl

hello all, I'm in the process of repairing our 101 but i hit a solid wall finding out whats wrong with it. are there people with a working copy who could do some measurements on their copy? Unfortunately i have no schematic of the electronics, only the mechanics and PSU. I have made a crappy video of the scope trace of the delay line input and i'm very interested in a video of a working machine's delay line. :-) The video is here: http://youtu.be/llpwjGeldt0 and a partially repairlog is here: https://hack42.nl/wiki/Repair_Olivetti_Programma_101 als scematics are welcome as well. :-) -- Met vriendelijke Groet, Simon Claessen drukknop.nl

11 years, 3 months

4
7
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PET/CBM Book available

by nospam212-cctalk＠yahoo.com

I have a spare copy of the PET/CBM Personal Computer Guide Second Edition by Adam Osborne & Carroll S. Donahue published by Osborne/McGraw-Hill available. If you are interested make me an offer. David Williams www.trailingedge.com

11 years, 5 months

2
1
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RK05 classic computing trivia question

by ard＠p850ug1.demon.co.uk

Based on some boxes of stuff I unpacked today... How could you quickly distinguish an RK05F spare head from a normal RK05 spare head? -tony

11 years, 5 months

8
12
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Anyone have a spare DECstation in europe for a developer?

by abs＠absd.org

Bj?rn Johannesson has been working on the VAX framebuffer and keyboard code in NetBSD to get X running on the LCG equipped machines (like the VAXstation 4000/VLC and 4000/60). He's expressed an interest in looking at some issues in the DECstation X11 code, but doesn't have access to an appropriate machine. On the offchance, would anyone know of a little DECstation which might appreciate a new lease of life as a development box? :) Bj?rn is in Sweden, but I've heard that for the appropriate remuneration there are companies which will transport computers across oceans in (relative) safety :-p David

11 years, 5 months

7
12
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RDI laptop for sale (commercial listing)

by linimon＠lonesome.com

So I triaged this unit the other day and now my company has listed it on eBay. It didn't come with the power brick so we couldn't test it; if you have one of these with its brick and need a spare, this is for you :-) http://www.ebay.com/itm/Rdi-Ultrabook-Sun-167MHz-or-200MHz-UltraSPARC1-256M… mcl

11 years, 5 months

1
0
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HP 16500A Breakout and Missile Command

by cruff＠ruffspot.net

On Sun, 28 Dec 2014 07:55:58 -0800 Al Kossow wrote: > > Also, if someone has one, I'm interested in getting a first-generation 500A CPU > card (the one with DIP DRAMs) since I'd like to get a good picture of it. I have one also from my 16500C upgrade, if you need one.

11 years, 5 months

6
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Italians around?

by shadoooo＠gmail.com

me, if you need!

11 years, 5 months

3
2
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HP 16500A Breakout and Missile Command

by aek＠bitsavers.org

Oh well, didn't quite get it in time for Christmas. http://bitsavers.trailing-edge.com/bits/HP/16500/16500A/16500A_Games.zip There is an imagedisk image and extracted files from the LIF volume.

11 years, 5 months

6
15
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OT: Physical Book Prices

by jnc＠mercury.lcs.mit.edu

> From: Charles Dickman > a book that was pure computer geek porn: "Core Memory" by Mark Richards > & John Alderman. ... I went looking on Amazon for it. The price is $172 > for a new hardcover and $78 for a used hardcover. > This is ridiculous. For anyone who wants a copy, I just ran across a copy on eBay: http://www.ebay.com/itm/161534172515 going for a more reasonable amount ($29, no bids at the moment). The sale ends today (8:15PM EST). Noel

11 years, 5 months

1
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Weekly Classic Computer Trivia Question (20141226)

by dpi＠dustyoldcomputers.com

This one is seemingly easy. On the front panel of the original PDP-8 (straight 8), how many lights are there? There is a pretty good picture of one on Wikipedia if you feel like sneaking a peek. Doug Ingraham PDP-8 S/N 1175

11 years, 5 months

3
3
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Multiple copies (Duplicates or more)...

by lbickley＠bickleywest.com

Am I the only one getting multiple copies (duplicates or more) of cctalk emails? Fortunately, my email client supports eliminating duplicates - but I'd like to know if this problem is specific to me - or are others experiencing this too??? Lyle -- Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"

11 years, 5 months

8
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ISO Applied Microsystems EL 1600 Emulator Documentation

by aek＠bitsavers.org

In the early 90's Applied Microsystems updated their 16 bit emulators with a 68020 processor and ethernet. The original had a 6809 as the emulation processor. There is almost nothing about these on the net, there was apparently a EL 3200 version which supported Intel. This may have been a short lived product since they switched to BLM and other serial products around then. Main interest is I discovered I have one, most of my AMC boxes are ES 1800 (serial 6809) and wanted to try to use it. It's possible they switched to some proprietary undocumented protocol on the other hand. Their product part numbering is cryptic, to say the least. I have two units that look indentical on the outside (later plastic cases with the carrying handle) and the emulation processors in them are 6809 in one (the Z8001 one) and 68xxx in the other (the 68000 one, pn. 750-01600-00). Looking on eBay, it appears the 32 bit units are pn 750-13200-xx http://www.ebay.com/itm/271314972572 for example

11 years, 5 months

1
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Tektronix 4014 optional communications

by djg＠pdp8online.com

I'm trying to get my 4014 working and am having trouble with the optional data communcations board. I'm not positive if its a later version of 021-0074-00 (070-1379-00) or a different option. It is identifiable by the control plate on the back has thumb switches that display the baud rate instead of a rotary switch. Does anybody have one of these who can tell me what settings and jumpers work for them or have the manual for this interface? My board is labeled 670-4758-00 JB-5337-00 Opt Data Comm With various settings I can get it to do nothing, send some characters properly and some wrong only while local echoing, and receive but not send.

11 years, 5 months

1
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HP equipment, call for documentation

by Arno_1983＠gmx.de

Hello everybody, Santa brought me two fine pieces of HP measurement equipment (o.k., I had to order and pay for them up front...) and I'm now looking for documentation on those. 1: HP 8016A Word Generator (http://www.decadecounter.com/vta/articleview.php?item=35). This basically is a 256 bit memory with control logic and drivers that can be configured to spit out its front panel programmed contents through 1, 2, 4 or 8 outputs (with a respective word length of 256, 128, 64 or 32 bits). Trigger can be applied externally or via pushbutton, bit clock (up to 50 MC) can be internally generated or externally connected. Output levels can be set to TTL or ECL with adjustable offset, RZ or NRZ operation selected. Each output is also available negated on a separate connector, four channels have separately adjustable delays. The real surprise with this one was that it came with the IEEE-488 (HP-IB) data load option installed. I have found datasheets and the User section of the manual (Chapter 1-3) here, but this contains neither the HPIB instruction set (which I'd like to have anyway) nor the schematic and service instructions (in case I should need them - couldn't try the device out yet because I'll have to replace a broken IEC receptacle first). 2: HP 11835A Serial Data Buffer (http://www.hpmuseum.net/display_item.php?hw=665). Contains two banks of 64k x 16 bit parallel-input, serial-output data RAM, 128k x 16 bit control RAM feeding the frame control state machine, and 64k x 8 bit frequency RAM driving a parallel control output. Originally intended to provide continuous serial data streams at up to 4 MHz and control a frequency agile synthesizer (HP 8662A) for testing mobile communication devices; mine was in use at a Nokia R&D facility in Oulu, Finland, according to a sticker. This unit is usually controlled and fed with data from a microcomputer (HP 9000 Series 300 or Vectra series) through a HP 82306 GPIO interface, which I don't have. Found no documentation except for a four-page data sheet with a simplified block diagram (https://www.valuetronics.com/Manuals/HP_11835A.PDF) yet and would need at least the specification for the GPIO connector and its protocol to get anything working, plus preferably said interface card plus documentation and/or driver software. Thanks in advance for any assistance offered. Yours sincerly, Arno Kletzander

11 years, 5 months

2
1
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ASR33 carriange stopper issue

by billdeg＠buzz1.com

> .. it could well be that the grease or oil on the side of the piston has dried and has become sticky goo. just clean well with white spirit ans apply a thin layer of thin oil. adjusting the valve hole should only be caried out starting the carriage from the far end. > An alignment problem between the piston and the cylinder could also be the problem. are the ball bearings of the carriage free running? My $.02 Alignment is the first thing to check here. You can clean and check airflow of the piston into the cup, but be careful about what grease (?) you use. I'd just clean and make sure there is no debris in there only. If alignment fixes the problem you probably don't need to do anything else. Use a nut driver to loosen the nut screws and carefully move the printer and/or belt return a few millimeters at a time until you get the result you're looking for. Clean the return spring (with something underneath to catch any debris) if it's really gunked up with old oil. Don't use pliers to open the nut screws, the investment in a nut driver is very worth it. b

11 years, 5 months

1
0
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Italians around?

by info＠drukknop.nl

Hello all, as I am in the process of restoring a Olivetti Programma 101, Jim pointed me to a bunch of documents on the logic in this machine, all in italian. The Programma 101 is build using Resistor-Transistor-Logic, and the schematic representation is not one i've seen before. So I've decided to translate the docs to english and google translate can be of some help here, but a lot of the technical meaning is lost. By looking at the schematics and the boards themselves I could solve some mysteries, but I could use some help in translating. Our machine seems to have intermitted problems and I think they are caused by bad contacts in the backplane, but to be shure, a good schematic and explanation of the workings is a tremendous help. Is there someone able to take a look at the originals and my rudimentary translation and suggest improvements? -- Met vriendelijke Groet, Simon Claessen drukknop.nl

11 years, 5 months

5
5
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Wooden case for DBit power and signal adapters - and a drive too

by david＠attglobal.net

Finally feeling guilty enough about stringing a bunch of expensive electronic bits out on my bench whenever time came to use an 8" disk drive, I mounted my DBit-sourced parts and power supply into a case. And the power+smarts sled slides in and out and has little feet on the bottom so it can be re-used with other loose 8" drives too. Some pictures with the least-intrusive Google Drive URLs I could manage: The sled that holds the repurposed PC power supply, FDDC power converter, and FDADAP signal adapter: https://docs.google.com/file/d/0B0im7ldJkbevMHNRV0s2MzZWcEE/preview?pli=1 The FDADAP doesn't have great mounting capabilities, so I just made a little edge holder out of wood for it. This slides into a cabinet (made of wood scraps...) so that it sits above the floppy drive it's powering: https://docs.google.com/file/d/0B0im7ldJkbevT1M3QTdsWE9obk0/preview?pli=1 And of course what olden tech thing would be complete without a shiny red button? https://docs.google.com/file/d/0B0im7ldJkbevaUVQRkxBbnozVTQ/preview?pli=1 There's room/depth on the front for a bezel, but I'm not sure I'll bother: https://docs.google.com/file/d/0B0im7ldJkbevSGJRREFxWklTRGc/preview?pli=1 Yeah, the digits on the FDADAP are upside down the way everything ended up being oriented, but I don't suppose I'll be looking at the back from now on.

11 years, 5 months

3
4
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ASR33 carriange stopper issue

by simski＠dds.nl

it could well be that the grease or oil on the side of the piston has dried and has become sticky goo. just clean well with white spirit ans apply a thin layer of thin oil. adjusting the valve hole should only be caried out starting the carriage from the far end. An alignment problem between the piston and the cylinder could also be the problem. are the ball bearings of the carriage free running? On 27-12-14 15:14, Robert Jarratt wrote: > I have not seen this on my 33. There is a little valve at the end of the cylinder to let air out, try adjusting that. I can't remember if you should oil or grease the cylinder too, I am not at home to check what I did. Careful not to make the resistance too low either, it needs to be not too high or too low. > > Regards > > Rob > > -----Original Message----- > From: "Martin Meiner" <martin at meiner.ch> > Sent: ?27/?12/?2014 14:07 > To: "cctech at classiccmp.org" <cctech at classiccmp.org> > Subject: ASR33 carriange stopper issue > > Hello guys. > I recently acquired for a mere 25 EUR a nice ASR33. Aside of needing a thorough cleaning and greasing, it seems to be pretty much working fine! > But I wouldn't write here if I wouldn't need your help: > The ASR33's carriage has a spring that gets tighter as you type. And upon CR, the spring will bring the carriage back to its original left position. There is a mechanism, similar as a piston and a cylinder, which acts as a "bumper" or stopper. My problem is that this stopper, while not showing any signs of usage, seems too tight. If the carriage is all the way to the right, the spring will be strong enough to overcome the "too tight stopper". But if only a few words were typed followed by CR, the force is not strong enough to bring the carriage to its left home-position. Of course I could take down some of the piston's diameter to overcome the problem. But this doesn't seem right. > Anyone out there also had a problem with this stopper being too tight to bring the carriage to its home position and how to overcome it? > Thanks for any advise on the issue. Martin > -- Met vriendelijke Groet, Simon Claessen drukknop.nl

11 years, 5 months

1
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ASR33 carriange stopper issue

by martin＠meiner.ch

Hello guys. I recently acquired for a mere 25 EUR a nice ASR33. Aside of needing a thorough cleaning and greasing, it seems to be pretty much working fine!? But I wouldn't write here if I wouldn't need your help:? The ASR33's carriage has a spring that gets tighter as you type. And upon CR, the spring will bring the carriage back to its original left position. There is a mechanism, similar as a piston and a cylinder, which acts as a "bumper" or stopper. My problem is that this stopper, while not showing any signs of usage, seems too tight. If the carriage is all the way to the right, the spring will be strong enough to overcome the "too tight stopper". But if only a few words were typed followed by CR, the force is not strong enough to bring the carriage to its left home-position. Of course I could take down some of the piston's diameter to overcome the problem. But this doesn't seem right.? Anyone out there also had a problem with this stopper being too tight to bring the carriage to its home position and how to overcome it?? Thanks for any advise on the issue.?Martin?

11 years, 5 months

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DEC printsets on line

by j＠ckrubin.us

I've digitized several early PDP-8 related printsets and placed them online in a public Dropbox folder. Circumstances did not allow direct scanning of the documents - they were photographed and then post-processed to produce .pdf files. Conditions were less than optimal and the resultant files are quite large but hopefully these files will be of use to those who need them. The files are: 779 Power Supply 832 Power Controller PDP-8/I Printset DM01 Printset KW8I Printset TC01 Printset TU55 Printset The files are located at: http://tinyurl.com/PDP8I-docs Best, Jack

11 years, 5 months

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Merry Christmas

by shadoooo＠gmail.com

Hello Folks, Merry Christmas! Andrea

11 years, 5 months

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A bit of Hacker History

by silent700＠gmail.com

It's taken me far too long to get these things prepped and posted, so why not a holiday release? Some historical reading for your post-meal time on the sofa: http://silent700.blogspot.com/2014/12/is-this-something.html The tl;dr version: I was given some message board dumps from one of the original hack/phreak scene BBSes, covering a portion of its short run in 1980-1. That led to obtaining some more, which I've cleaned up and compiled into a PDF. I feel they're an invaluable insight into the "state of things" back then, not to mention just a fun read. Some familiar names in this lot...perhaps even some we know...? Happy $holiday(*) and enjoy... -j

11 years, 5 months

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A bit of Hacker History

by jnc＠mercury.lcs.mit.edu

> From: Jason T > I was given some message board dumps from one of the original > hack/phreak scene BBSes ... That led to obtaining some more, which I've > cleaned up and compiled into a PDF. Thank you for saving, and making available, this valuable historical data. Noel

11 years, 5 months

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Last call for free VAX 6610, VAX 7760, Alpha GS60e

by binarydinosaurs＠gmail.com

Folks, These machines are still available in Newmarket UK, I'd like to save them even if it means me hiring my own truck next week. Paging Jim Austin, got room for them in York? Cheers, -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest home computer collection? www.binarydinosaurs.co.uk

11 years, 5 months

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Best of Season

by Arno_1983＠gmx.de

Hello everybody, Happy Holiday (Christmas, Kwanzaa, Chanukka, Yule, Newtonsday...) to all my fellow listmembers. Hope you can enjoy a few holidays and have some (perhaps also classic computer related) fun. My best wishes also for the upcoming year 2015. Yours sincerely, Arno.

11 years, 5 months

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Delivering a computer in 1957

by sellam＠vintagetech.com

Neat photo: http://twistedsifter.com/2014/12/delivering-a-computer-in-1957/ -- Sellam ibn Abraham VintageTech ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintagetech.com Whatsoever a man soweth, that shall he also reap. The truth is always simple. * * * NOTICE * * * Due to the insecure nature of the medium over which this message has been transmitted, no statement made in this writing may be considered reliable for any purpose either express or implied. The contents of this message are appropriate for entertainment and/or informational purposes only. The right of the people to be secure in their papers against unreasonable searches and seizures shall not be violated.

11 years, 5 months

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Hosting large files Was: DEC printsets on line

by jnc＠mercury.lcs.mit.edu

> From: steve shumaker > I'm looking at posting a large spreadsheet for the list to use and am > looking at options I'm happy to host any large files related to the list's focus. Noel

11 years, 5 months

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Okidata 182

by fast79ta＠yahoo.com

I was recently playing around with my old ML 182. Due to it's oki rom, it has some what limited use, as even windows 3.1 doesn't support it. There is an IBM rom for the printer mentioned as a kit (310-324-01), that will turn it into an IBM graphics printer. Does any one have, or know where to find this rom image? Thanks, and merry christmas everyone.

11 years, 5 months

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Core Memory: a Visual Survey of Vintage Computers book

by jws＠jwsss.com

I just got my copy of the Core memory book. Very nice work. I noticed there is what I think may be a mis-identified system in the front. It shows an Apollo system of some sort, but identifies it as an Apollo Guidance computer. I went back and forth a few times and convinced myself it was wrong. It is a very nice book. I've got a few of the systems photographed, which is nice as well. Jim

11 years, 5 months

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Wanted: MLR1 Cleaning Cartridge and/or Media

by Kevin＠RawFedDogs.net

Classic Computer Fans, My IBM 9406-270 came with an internal MLR1 tape drive. I recently acquired a tape to test it with. I was able to initialize the tape and save/restore a small test library without errors. I ran a read/write reliability test and that failed. It said it was a 95% chance that it's a hardware problem and a 5% chance it's a media problem. The drive is asking to be cleaned. I'm hoping that it's a media problem or that the drive just needs to be cleaned. Does anyone have an MLR/SLR cleaning cartridge and/or any MLR1 media to spare? -- Kevin http://www.RawFedDogs.net http://www.Lassie.xyz http://www.WacoAgilityGroup.org Bruceville, TX What's the definition of a legacy system? One that works! Errare humanum est, ignoscere caninum.

11 years, 5 months

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test-drb December 2014