test-drb

test-drb@ccmp.vtda.org

101090 discussions

by fedorkow＠mit.edu

? Al K has read hundreds of these Whirlwind tapes using a standard 8-track optical reader, so I think we can confirm that it is punched with the common geometry, except one track narrower, with four bits on one side of the sprocket holes, and three bits on the other. ? The tapes are for pedagogical purpose, so if I can punch on inch-wide tape and perhaps trim the width later, that works just fine. Thanks all! ?/guy Date: Fri, 26 Mar 2021 16:01:38 -0700 From: Al Kossow <aek at bitsavers.org> To: cctalk at classiccmp.org Subject: Re: punching paper tape Message-ID: <f52af974-dbc4-0a51-409e-b4cc2b9076e9 at bitsavers.org> Content-Type: text/plain; charset=utf-8; format=flowed On 3/26/21 2:58 PM, Steve Malikoff via cctalk wrote: > OK thanks for that. I just had a browse and read that "Whirlwind used > the same paper tape format that was popular with Teletype machines" so > I gather it's nothing special after all. the best picture i have at hand of what a ww tape looks like is on the right of http://bitsavers.org/bits/MIT/whirlwind/X4222.2008_Whirlwind_ptp/pictures/s… you can see it is narrower by one punch than a normal 8-channel tape

5 years

Hard To Believe This Person Is Serious

by robert.jarratt＠ntlworld.com

https://www.ebay.co.uk/itm/313467585213

5 years

punching paper tape

by fedorkow＠mit.edu

Is there someone in North America that might be willing and able to help out a small historical display project by punching a few short paper tapes? I'm glad to try to accommodate whatever coding requirements are easiest. Thanks! /guy fedorkow fedorkow at mit.edu

5 years

Logic Analyser Usage Advice

by robert.jarratt＠ntlworld.com

I have an old HP 1630G logic analyser. I am trying to use it to debug a problem with an 82C206 peripheral controller (or rather I think damage between the CPU and the peripheral controller). I am not very experienced with logic analysers and I wonder if I am using it correctly. What I am trying to do is see which internal registers are being read/written and the values. To do this there are two signals (XIOR and XIOW) that trigger the read/write on their rising edge. So I have connected the XIOR and XIOW signals to the J and K clock inputs and set the LA to clock on the rising edge. I have then told the LA to trigger on a particular address range (in the State Trace screen if anyone is familiar with this LA). When I run the analyser it complains of a slow clock. This makes sense, because I am using the read/write signals to drive the clock inputs so that I only capture actual reads and writes to the peripheral controller. However, I don't seem to be getting sensible values in the trace and I am wondering if the LA is really not capturing anything because of the slow clock? I don't think it makes sense to clock the LA on the actual clock signal because I won't be able to capture the address and data values on the rising edge of the read/write signals and I would end up with traces full of useless data. Am I doing it right, or is there a technique that I am missing here? Thanks Rob

5 years

MaxSpeed VGA MaxStation

by commodorejohn＠gmail.com

So, some months ago, I was in an electronics surplus store and picked up what was obviously an X terminal - tiny metal slab with a VGA connector, serial & parallel, AT keyboard, and RJ45 "communication" port. I got it bare, without the external PSU that would've gone with it, and I've since been unable to determine just what the heck I'm supposed to feed this thing. It's a standard barrel jack, but there's no markings on the case or the PCB to give any clue as to what voltage/amperage or polarity it expects, and Google has been no help at all. Does anyone have any recollection of these things? Any idea what they want for juice? To throw an extra mysterious wrinkle into this, when I popped open the case to get a look at the PCB, I found that, apart from the CPU, DART, and ROM, the only non-glue ICs on the board were an 8K SRAM and a W82C476 RAMDAC - but 8K isn't even remotely enough for a VGA screen, not even a monochrome one at VGA resolution! Am I missing something on how these things operated? Given this, my only guess would be some kind of insane networked-framebuffer scheme where the host would blast video data in on the fly, but there's no way this was even 100Mbps Ethernet, and 10Mbps isn't nearly fast enough to transfer 150KB at 60FPS, and there's no memory to buffer it for a slower refresh. What in the heck is going on here?

5 years

seeking docs for Monlithic Systems 303-0158 unibus memory

by fritzm＠fritzm.org

Subject line says it all -- I'm working on a restoration that includes one of these, and it looks as if it needs some troubleshooting/repair. I didn't see docs posted at Bitsavers. Anybody have a manual squirreled away? cheers, --FritzM.

5 years

DEC CTI Bus Technical Manual, or looking for Ken Wellsch or Megan Gentry

by bdweb＠mindspring.com

Hello All, Does anyone have a copy of the DEC CTI Bus Technical Manual (EK-00CTI-TM-002) I can scan? If not, does anyone have an email address for Ken Wellsch or Megan Gentry as they both appear to be authorities on the CTI bus (see https://en.wikiversity.org/wiki/DEC_Professional_(computer)/Archive question 10)? Thanks in advance! --Bjoren Davis

5 years

VCF Swap Meet in Wall, NJ

by jeffrey＠vcfed.org

Announcing our second Annual Vintage Computer Federation Swap Meet! Last year's Swap Meet was very successful so ... we are doing it again! *DATE*: April 24, 2021 (RAIN DATE: April 25, 2021) *TIME*: 8AM to 2PM *ADDRESS*: Parking Lot on Monmouth Boulevard, Wall, NJ Across from Infoage Museum and Brookdale College *GPS location*: https://goo.gl/maps/m1AAS4UUziGXnoPeA (40.1848793,-74.0630848) *WEBSITE*: http://vcfed.org/wp/vcf-swap-meet *EMAIL*: swapmeet at vcfed.org *PHONE*: 732-722-5015 Free to buyers. Vendor cost is per space. First space is $20, each additional space is $10. You can park in your space and sell out of your vehicle. *SEND PAYMENT TO*: paypal at vcfed.org (FRIENDS AND FAMILY OPTION) Write in the note section: [your name] VCF Swap Meet 4/24/2021 Number of spaces: *SWAP MEET SIGNUP*: https://forms.gle/kNCL8WVxTQcnw5nA6 * Reservation doesn't guarantee sales. * The Vintage Computer Federation is only providing a space, vendors must bring their own tables, tents, cars. * In case of inclement weather, money paid will be refunded. * All items that you bring must be taken with you. No items are to be left behind. * Port-o-potty on site. Jeff Brace ========================================= Vice President & Board Member Vintage Computer Festival East Show-runner Vintage Computer Federation is a 501c3 charity http://www.vcfed.org/

5 years

BS was Re: VCF Swap Meet in Wall, NJ (Liam Proven)

by marvin＠west.net

What a bunch of ^%#%#@$^. FYI, this is a listserver designed for classic computer discussions. Please save your diatribes for a more appropriate venue!!! Marvin > Look, TBH, sorry to be That Guy, but what it sounds like is made-up > mumbo-jumbo with as much basis in science as saying his choler is too > low and phlegm and bile out of equilibrium. > > It's an anti-masker trying to justify killing other people. It's no > more valid than a gun nut shouting about the constitution when they've > never been near a "well-organized militia" in their life. > > Keep well away from any people like this in real life. Do not come > into physical contact with them, ever, anywhere. > > -- > Liam Proven ? Profile: https://about.me/liamproven

5 years

Any info on a Western Peripherals DC-230 disk controller?

by derschjo＠gmail.com

Any ideas what this disc controller is? https://www.ebay.com/itm/PDP-11-Backplane-Western-Peripherals-DC-230-Disk-C… Can't find much about this on the 'net, other than that it was a controller for Diablo/Pertec style drives -- no idea if it's an RK11 clone or something else entirely. Looks to be suitable for a PDP-11/20 given the little notch missing from the side there, and the lack of a separate power harness for the backplane. - Josh

5 years

ODE 2.1.1 documentation

by ben＠huntsmans.net

Hello! Does anyone have any old documentation for ODE 2.1.1, or relatively close versions? I know "newer" versions have been released and have documentation available, but there are some changes in some of the config files that are very different from older versions. For example when creating a sandbox, in the sandbox directory there is a subdirectory called rc_files, that is supposed to have two files, "local" and "shared", but they don't work the same way that rc_files/Buildconf and Buildconf.exp work in newer versions... Anyone on here know anything about ODE, or any other sources of information? Many thanks!

5 years

VAX rom patches - VAXstation 2000 SCSI boot, KA420 > 1GB boot

by abs＠absd.org

I had some extra A4 pages with a VAXstation 2000 manual which covered a preview PK2K kit for VMS, bootloader and ROM to allow use of the VAXstation 2000 SCSI controller for more than just tapes. Rough scan at http://sync.absd.org/vax/VAX-PK2K-preview-kit.pdf (the originals will be sent to someone who can do a better job) The pages led me to http://ftp.gwdg.de/pub/vms/ which includes some goodies: - http://ftp.gwdg.de/pub/vms/pk2k - uVAX-2k SCSI patches with source for boot roms, VMB & VMS - http://ftp.gwdg.de/pub/vms/ka420 - ROM patches for KA420/KA430 boot >from >1GB disks - http://ftp.gwdg.de/pub/vms/dk-552/ - VMS 5.2 patch to allow to accept more SCSI disk devices (Starting a new thread in case there is (slightly) more general interest for anyone interested in using the onboard uVAX-2K SCSI controller more more than tapes (OK, OK, for anyone not running NetBSD on their uVAX-2K interested in etc etc) - have cross posted to cctalk & port-vax - hopefully not violating any conventions there) David

5 years

VAXstation 2000 network & hardware guides (English & German)

by abs＠absd.org

I have acquired a tiny slice of Orange Wall, and wondered if anyone would be interested - preference for anyone who is setup to scan and upload the missing bits to bitsavers or similar :) These seem to already be generally available online EK-NETAB-UG-002 Workstations and MicroVAX 2000 Network Guide EK-VAXAB-OM-002 VAXstation 2000 Owner's Manual (Covers how to replace your mouse balls, and details exciting options such as LN03, LN03 PLUS, LPS40, LA210, LA100, LA75, LA50. LGC01, LVP16, DF224, DF124, DF112, VSXXX-AB :-p) These I cannot immediately find EK-NETAA-UG-001 VAXstation 2000, MicroVAX 2000 and VAXmate Network Guide EK-VAXAB-IN-002 VAXstation 2000 Hardware Installation Guide Likewise these German versions EK-NETGA-UG-001 VAXstation 2000, MicroVAX 2000 und VAXmate Netzwerk-Anleitung EK-A0305-IN 001 VR160 Installations-und Bedienungsanleitung EK-A0355-OG-001 Grafikkoprozessor (8 Bildebenen) fur die VAXstation 2000 Installations- und Bedienungsanleitung Thanks David

5 years

TC08 DECtape bootloader question

by kylevowen＠gmail.com

My understanding of the OS/8 TC08 bootloader (MI8-EC) is as follows: 0. Rewind tape 1. Set current address (07755) to 07600 2. Set word count (07754) to -0200 3. Read block 0 and wait for flag 4. Continue executing at 07600 However, it appears as though word count will be hit by the loading of the first block. In fact, my instrumented version of SimH says it's overwritten with a zero. If that's the case, it would seem as though the word count overflow flag will never get set. Not to mention, the current address will be updated next, causing data to be redirected to yet another position. But according to SimH, a write to the current address, 07755, never happens. How can this be? Any help would be appreciated! Kyle

5 years

DECtape ancestry (Kyle Owen)

by michael.99.thompson＠gmail.com

> > Date: Sat, 20 Mar 2021 16:21:44 -0400 > From: Kyle Owen <kylevowen at gmail.com> > Subject: Re: DECtape ancestry > > What systems took advantage of the bidirectional nature? > > Kyle > ADSS on the PDP-9 does an interleave of 6 when reading/writing to the DECtape. If it runs off the end it reverses direction and keeps going. I have seen some library files take three passes of the DECtape to fully search. -- Michael Thompson

5 years

DECtape ancestry

by paulkoning＠comcast.net

I just read part of the Grant Saviers interview from CHM, where near the end he gives a bit of history of DECtape. In particular, the fact that it was derived from LINCtape though the format details are quite different. A question popped into my mind, prompted by having read Guy Fedorkow's paper about Whirlwind just a few days earlier: the Whirlwind tape format has 6 physical tracks but 3 logical tracks (each logical track is recorded redundantly on two physical tracks) and one of those tracks is a clock track. LINCtape and DECtape have the same redundant recording scheme, and also have a clock track; the difference is that they add a mark track to enable the recording of block numbers and in-place block writing. That made me wonder if LINCtape was, in part, inspired by the Whirlwind tape system, or if those analogies are just a concidence. Incidentally, it's probably not widely known that LINCtape/DECtape is not the only tape system with random block write capability. Another one that does this is the Electrologica X1 tape system, which uses 1/2 inch 10 track tapes, which include a clock and a mark track. An interesting wrinkle is that the X1 tape system lets you chose the block size when formatting the tape, and then data block writes allow for the writing of any block size up to the formatted block size. I'm not sure when that device was introduced; the documentation I have is from 1964. There's no sign the designers knew of DECtape (or vice versa). paul

5 years

the question

by sieler＠allegro.com

Hi, I just wanted to thank Tony for asking the question (disability vs. masks) and particularly wanted to thank Robert for the kindness of answering it! I learned something today! Stan

5 years

Oregon Pascal for M68000

by classiccmp＠philpem.me.uk

Hi all, Does anyone have any documentation (or perhaps even a copy?) of Oregon Pascal for the Motorola 68000? I'm looking for information on its calling convention, if such is available -- or otherwise a way to run it with arbitrary code and see how it behaves. Once again I'm reverse-engineering a 68K-based embedded system... :) Cheers Phil.

5 years

FS: Panavise vise with circuit board adapter!

by mechanic_2＠charter.net

Hello all, As you all know by now I probably have cancer and I am selling off my possessions to finance my travels around the country. I have for sale one Panavise vise with nylon jaws and a large circuit board holder adapter. $100 plus shipping. Please reply off list. I live in Reedsburg, WI 53959. I prefer Paypal F&F. If you use G&S please add the 4.5% handling fee. Will accept MO, Cashiers Check, and Personal Check (must clear before shipping)! GOD Bless and Thanks, rich!

5 years

[HOswap on IO] FS: Panavise vise with circuit board adapter!

by mechanic_2＠charter.net

Hello all, The Panavise is sold. I appreciate the interest! GOD Bless and Thanks, rich! On 3/18/2021 3:41 PM, Richard R. Pope wrote: > Hello all, > As you all know by now I probably have cancer and I am selling off > my possessions to finance my travels around the country. I have for > sale one Panavise vise with nylon jaws and a large circuit board > holder adapter. $100 plus shipping. Please reply off list. I live in > Reedsburg, WI 53959. I prefer Paypal F&F. If you use G&S please add > the 4.5% handling fee. Will accept MO, Cashiers Check, and Personal > Check (must clear before shipping)! > GOD Bless and Thanks, > rich! > > > -=-=-=-=-=-=-=-=-=-=-=- > Groups.io Links: You receive all messages sent to this group. > View/Reply Online (#47099): https://groups.io/g/HOswap/message/47099 > Mute This Topic: https://groups.io/mt/81439849/89555 > -=-=- > Help spread the word about HOswap! Tell your friends and groups about > how great this group is. https://groups.io/g/HOswap > -=-=- > Group Owner: HOswap+owner at groups.io > Unsubscribe: https://groups.io/g/HOswap/unsub [mechanic_2 at charter.net] > -=-=-=-=-=-=-=-=-=-=-=- > >

5 years

name/model of HP portable printer? (not HP 2225x) circa 1993

by sieler＠allegro.com

Hi, Does anyone remember the product name or number of the tiny HP portable printer (*not* an HP 2225 of any kind!) that probably came out about the same time as the HP Omnibook 300 (1993)? (My google-fu failed me.) IIRC, it was able to print on regular paper 8.5" wide, probably using a thinkjet mechanism. Battery powered, probably black, probably HP-IL interface. I remember coveting one when I got my first Omnibook, but by that time they were off the market and the only one I ever saw wasn't for sale (I did borrow it for a few days, it worked well). The use of standard (in the U.S.) paper, plus the tiny size, had be interested in it. thanks, Stan

5 years

who collects modems?

by rsmilward＠frontier.com

If anyone has a modem made by Datec, a long-defunct manufacturer from Chapel Hill, NC, please let me know. I used to do customer support for them back in the early '80s. (They used to run ads in Byte Magazine touting their "crystal-controlled stability".) Thanks. **Richard

5 years

PDP-10 I/O notes

by dstalk＠execulink.com

For what it's worth I've posted some notes on PDP-10 I/O from a course taught by Mike Bennett at UWO in the early 1970s. The monitor at the time was likely prior to 5.06. See: http://www.execulink.com/~dstalk/pdp-10_io.pdf Don

5 years, 1 month

who collects modems?

by boris＠summitclinic.com

Have a bunch of modems as well but first have to get PDP-11 stuff shipped off to those people who want it. Will see if Value Village in Kamloops will still take them. For a while they were a great place to get old electronics like the DAT SCSI drive I picked up for $5 8 years ago. "high speed" at 50 Kb/sec transfer rate which seemed fast in 2010 when I picked it up and got all my DAT backup tapes transferred to "disks" which can only run under BasiliskII now. >Clearing out stuff at my space, I have the following modems: > >NEC UltraLite-Series Image Modem Plus w/box >CTS Datacomm 2424 ADA modem w/box >Scout Plus External Data/Fax modem w/box >Digital DF03 modem > >Any offers? > >--tom

5 years, 1 month

Looking for Overland TC-50M 8-bit ISA Controller drivers&software

by bvasea＠gmail.com

I have this controller, I bought it from the Netherlands three years ago with a Cipher horizontal tape drive. It was pulled from a working system but... no drivers. Does anyone have any related software for this controller? It is listed here: http://www.vcfed.org/forum/showthread.php?66915-Overland-Data-TC-50M-Pertec… I tried everything from Bitsavers. All drivers, all software. Nothing works. The board is not listed so I installed and tried everything. To give something in exchange, I wish to contribute with the full Qualstar Tapestar for Dos package to bitsavers and archive.org (separate thread).

5 years, 1 month

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