test-drb

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101090 discussions

by Wayne.Smith＠warnerbros.com

> Date: Thu, 4 Sep 2014 09:35:26 +0200 > From: Camiel Vanderhoeven <iamcamiel at gmail.com> > Subject: Re: Cosmac Development System CDP18S004 > > It tells me I'm not authorized to view the album... Ugh - thanks - just changed the privacy settings to public - here's the link again: https://plus.google.com/photos/113825148583667464381/albums/605503163855891…

11 years, 11 months

Cosmac Development System CDP18S004

by Wayne.Smith＠warnerbros.com

I am looking for one replacement pushbutton cover for the front panel of a Cosmac Development System. There's a link to some photos of the system below - the missing button cover is the one that goes on the "LOAD" button at the upper right of the first picture. Any help locating one of these is appreciated. Thanks. https://plus.google.com/photos/113825148583667464381/albums/605503163855891… Wayne Smith

11 years, 11 months

What was the purpose of XCT on the PDP-10/EX on the S/360?

by krfkeith＠gmail.com

As I understand it, what these instructions do is basically jump to a word in memory, execute that word as an instruction, and them jump right back. What were the usages of these in standard code? What was the rationale behind them? -- Thanks, Kevin

11 years, 11 months

Reproduction front panels and switch levers for PDP-8/E and M

by anders＠abc80.net

> Date: Wed, 3 Sep 2014 15:27:32 +0000 > From: Jack Rubin <j at ckrubin.us> > To: "Classic Computer List (cctalk at classiccmp.org)" > <cctalk at classiccmp.org> > Subject: Reproduction front panels and switch levers for PDP-8/E and M > Message-ID: <1409758047115.63856 at ckrubin.us> > Content-Type: text/plain; charset="iso-8859-1" > > I'm in the process of reproducing front panels for PDP-8/E and/or M > machines, as well as switch levers for these machines and others that use > the same shape but different colors (e.g. 8/L, 11/20). > > For the front panels, I'm working with a local (Chicago) silk-screen house > to create the reproductions. At this point (still exploring final > pricing), it looks like unit cost will be about $200 for a run of 5. This > will most likely be a CNC cut acrylic panel (laser probably won't work > because of the angled relief for the key switch) with silk-screen printing > front and back. The panel shape is the same for E and M but the screens > are quite different. I've also got a couple different M variations. Note > that each panel requires five or six screens, including black masking on > the back and transparent red or "frosted" masks for the indicator lights > in addition to the three colors on the front. > > I'm not sure about possibly adding a transparent overlay (non-original) > over the front silk screening to protect the final product. Please let me > know your interest and thoughts about a protective overlay. > > For the switch levers, "phooky" from the NYC Resistors has done a 3D > rendering - http://www.thingiverse.com/thing:360853 - and printed > prototype levers and mounting frames. Note that there are three renderings > at the thingverse site - original lever, lever with improved pivot (metal > pin) and bracket for attaching lever to available slide switch. Phooky has > also printed up samples of these objects. The next step is to work on > injection molding the parts. The Resistors have an injection molding setup > and phooky is planning to create a mold using CNC equipment and his 3D > renderings. There are several reasons for moving from 3D printing to > injection molding for these parts. The first two, finish and mechanical > strength, are slowly being addressed by improved printers but the third > reason, color matching, is the critical difference. > > The front panel project is in progress and hopefully panels will be > available in a few months. > > The switch project is very much exploratory with no promises or dates at > this time. > > Comments please! > > Jack I have heard that the reason for making the the pivot in plastic was that this should brake instead of the switch itself or the PCB in case of an accident. I have however restored a couple in my 8/L that was broken by drilling a hole through and inserted a metal pin. Works fine! Although I find this very interesting, at least in the levers since they fit on my 8/L. /Anders

11 years, 11 months

picking up a collection of old computers

by seefriek＠gmail.com

From: "drlegendre ." <drlegendre at gmail.com> > You don't see dirt floors in mid-20th century constructions, at least not in my USA. Apparently Atlanta, GA isn't part of "your" USA. My mid-20th century construction certainly has a dirt floor in the basement, as do a number of the neighbors.

11 years, 11 months

multitasking on PDP-11/03

by js＠cimmeri.com

On 8/27/2014 10:59 AM, cctalk-request at classiccmp.org wrote: > Subject: > Re: multitasking on PDP-11/03 > From: > Nigel Williams > <nw at retrocomputingtasmania.com> > Date: > Wed, 27 Aug 2014 21:09:47 +1000 > > > > On Wed, Aug 27, 2014 at 3:38 AM, > Andriy Romanenko <bigral at hotmail.com> > wrote: >> > What OS and/or running environment support time sharing on LSI11? Is there multi-user/multi-terminal support? > If you have a fast hard-drive you can run MINI-UNIX [1]: > > http://bitsavers.trailing-edge.com/bits/ATT/mini-unix_120679.zip > > We had this running circa 1980 with two (or maybe three) terminals and > 10MB Pertec fixed+cartridge disk system, LSI-11/03 with 56KB memory. > Before that we ran RT-11 [2] with foreground/background tasks and at > various times MU-BASIC (multi-user BASIC) [3]. Nigel, how (generally) did you adapt Mini Unix to that configuration? Did you have to write your own drivers for the hard drives? - John S.

11 years, 11 months

ISO SCSI QIC serial service port info

by aek＠bitsavers.org

I'm working on recovering some 1/4" cartridge tapes, and started looking at SCSI drives. Located the reference manuals for the Tandberg 3600 Series and I had the Archive 2060S/2150S manual. What I'm trying to find is the service manuals. Detailed stuff (schems) would be great, but both drives have serial service ports and even a description of those would be helpful. I dumped the firmware for the Archive drives this afternoon, shot some pcb pics, up on bitsavers, and have some 3620's coming to dump that. Figures the Tandberg web site would disappear today (I grabbed the later drive manuals on Fri) So much for trying to email them to see if the 3600 service manual was still available.

11 years, 11 months

FS: DEC PDP11 gear and other stuff

by jhfinedp3k＠compsys.to

>aswood at t-online.de wrote: >Dear listeners of this list and too whom it may concern or might be interested, > >due to support my Thatched Roof Restauration Project at Indiegogo http://igg.me/at/reetdach I'm going to sell at lot of stuff from my collection: > >There are PDP11 Systems: 11/23Plus, 11/24, 11/34, 11/44, 11/73, 11/84 and 11/93. Either only the cpu or as complete systems with disk drives or RL drives, e.g. there is a DecSystem with a 11/23Plus and two RL02, nice 11/84 Systems in a dual rack layout, which can be placed underneath an office desk. > >There are H960 Racks with RK05 drives. > >Additionally VT100 Terminals, RA drives, RC 25 drives and media, Tape drives, spare boards, RL drives and media, RX01 and 02 Spares. > >Manuals and documentation. > >There are some SMD drives (Fujitsu), a RP06 drive. > >Furthermore I'm offering NEXT Stations (mono and color) and MicroVaxen, mostly SCSI System (dual BA23 Systems). Additionally "bigger" Vaxen. > >More: Tektronix Storage Tube Display, Tektronix Computer, Wang Computer. > >And HP1000 System like A700 and A900, HP 1000 E/F CPUs and spare boards > >There are some HP9845 Computer. > >Feel free to contact me off-list. > >If you are willing to spend some $/? to my campaign, I possible will be able to order the roofer at the beginnig of October. > >Andreas > > I am using an old IE browser under Windows XP, so I can't see the stuff unless I update - which I can't do since it is not my computer. Any possibility of making the stuff compatible? Jerome Fine

11 years, 11 months

[SPAM key] - FS: DEC PDP11 gear and other stuff

by jhfinedp3k＠compsys.to

>aswood at t-online.de wrote: >Dear listeners of this list and too whom it may concern or might be interested, > >due to support my Thatched Roof Restauration Project at Indiegogo http://igg.me/at/reetdach I'm going to sell at lot of stuff from my collection: > >There are PDP11 Systems: 11/23Plus, 11/24, 11/34, 11/44, 11/73, 11/84 and 11/93. Either only the cpu or as complete systems with disk drives or RL drives, e.g. there is a DecSystem with a 11/23Plus and two RL02, nice 11/84 Systems in a dual rack layout, which can be placed underneath an office desk. > >There are H960 Racks with RK05 drives. > >Additionally VT100 Terminals, RA drives, RC 25 drives and media, Tape drives, spare boards, RL drives and media, RX01 and 02 Spares. > >Manuals and documentation. > >There are some SMD drives (Fujitsu), a RP06 drive. > >Furthermore I'm offering NEXT Stations (mono and color) and MicroVaxen, mostly SCSI System (dual BA23 Systems). Additionally "bigger" Vaxen. > >More: Tektronix Storage Tube Display, Tektronix Computer, Wang Computer. > >And HP1000 System like A700 and A900, HP 1000 E/F CPUs and spare boards > >There are some HP9845 Computer. > >Feel free to contact me off-list. > >If you are willing to spend some $/? to my campaign, I possible will be able to order the roofer at the beginnig of October. > >Andreas > I am using an old IE browser under Windows XP, so I can't see the stuff unless I update - which I can't do since it is not my computer. Any possibility of making the stuff compatible? Jerome Fine

11 years, 11 months

Making images of old CDs

by abuse＠cabal.org.uk

Hi, The recent thread on AB20 reminded me I have a large pile of CDs from the 1990s that could do with being imaged and uploaded to archive.org. What's the best free Unix tool[0] for doing this? Sure, I know about dd and cdparanoia, but those only extract data and CDDA respectively, and I'd prefer produce an actual image complete with TOC, subchannels, etc. To *use* the data, I can always transcode from that into something lossier such as FLAC :) but the reverse transformation is not possible. Failing that, I can go off and *write* one, but I'd rather not spend the effort if something suitable already exists and has already been well-tested and confirmed to not make subtle errors in rips. (Bonus points for tips on how to do the same with Blu-Ray discs, since I may as well archive them now rather than leave it until the 2030s.) [0] I say this otherwise some berk will pipe up with "you can do that with SuperMegaRipper Pro from Malware Inc. for Windows 9, and it costs just $299 for a 60 day licence". I'd rather toss the discs in the bin.

11 years, 11 months

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