test-drb January 2018

test-drb@ccmp.vtda.org

177 participants
213 discussions

by c.murray.mccullough＠gmail.com

I wrote about Spectre and Meltdown recently: INTEL took its time to inform the world! Did it inform the world back in earlier days about potential flaws? Not to blame INTEL only: What about Zilog, etc.? Or did pre-Internet era protect us computer-classic users? What about running emulation software as I?ve been doing with ADAM? Happy computing! Murray J

6 years, 11 months

New S-100 boards For Sale and Update to Tektronix 4051 bundle

by sellam.ismail＠gmail.com

Hello Good Folks. I've put up a new batch of S-100 boards for sale, details here: http://www.vcfed.org/forum/showthread.php?61192-Sellam-s-S-100-Hardware-Sof… I've also added a 4051E01 ROM Expander to the Tektronix 4051 system I put up for sale earlier. Details and photos here: http://www.vcfed.org/forum/showthread.php?61006-Tektronix-4051-complete-sys… As always, direct responses via e-mail. Thank you! Sellam

6 years, 11 months

Which Operating System for my DCC-116 E / Entrex 480 / Nixdorf 620 / Data General Nova 1200 clone ?

by jnc＠mercury.lcs.mit.edu

> From: Jay West > I'm wary of just sending the tape through the mail for imaging.... Why? I sent some tapes out to Chuck to get read, those went by USPS, and no problem (well, one had some drop-outs, but they were old and not in great shape; the other one read fine). Noel

6 years, 11 months

DECtape madness

by jnc＠mercury.lcs.mit.edu

So why are reels of DECtape selling for unbelievable prices on eBait? See, e.g. here: https://www.ebay.com/itm/372186744906 and here: https://www.ebay.com/itm/372186745609 I can't believe there are hordes of TU55/TU56 owners out there who desperately need media; so what is it? People who think DECtapes were super cool and have to have a reel, even though they don't have a drive? Or are there actually TU55/TU56 owners (remember, it takes two bidders to put the price up) who really need media? Anyway, it looks like this person: https://www.ebay.com/itm/202183912961 who got four for the 'bargain' price of $80 got a 'deal'! Noel

6 years, 11 months

Long Shot - Looking for boards from a Western Electric 101-A modem

by pete＠petelancashire.com

Think 101-C's are rare ? This weekend a Teletype model 35 came home with me and the attached Western Electric 101-A modem is missing its boards. https://photos.app.goo.gl/rZNAt20Vh9CXAflA3 -pete

6 years, 11 months

GT-40 etc.

by jnc＠mercury.lcs.mit.edu

> From: Fritz Mueller > Definitely an RK11-C Ah; the dual-wide plug-in connector soldered onto the back kind of threw me a bit! > And it would make sense with the diablo and the RK05 in there. Right, but I wonder if the RK05 is on the same controller as the Diablo, or if the PDP-8 has an RK controller, too. Noel

6 years, 11 months

Gallery online: A collection of Soviet control rooms pictures

by rtomek＠ceti.pl

What the subject says. For control & analog aficionados. http://blog.presentandcorrect.com/27986-2 source: https://lobste.rs/s/ziu1uu/collection_soviet_control_rooms -- Regards, Tomasz Rola -- ** A C programmer asked whether computer had Buddha's nature. ** ** As the answer, master did "rm -rif" on the programmer's home ** ** directory. And then the C programmer became enlightened... ** ** ** ** Tomasz Rola mailto:tomasz_rola at bigfoot.com **

6 years, 11 months

Which Operating System for my DCC-116 E / Entrex 480 / Nixdorf 620 / Data General Nova 1200 clone ?

by microtechdart＠gmail.com

Dominique, Just checking in with you on this, and to thank you for posting your interest in this system here. Do you have any updates, or perhaps new videos of it operating? Thank you! -AJ On Wed, Oct 4, 2017 at 1:33 PM, Dominique Carlier via cctalk < cctalk at classiccmp.org> wrote: > Hi all > > I start here another topic concerning my research about a new Operating > System for my freshly restored DCC-116 E. > > http://www.zeltrax.com/classiccmp_forum/second_boot/04.jpg > http://www.zeltrax.com/classiccmp_forum/second_boot/02.jpg > > I originally intended to install RDOS on my machine but it seems very > difficult to find the files needed to make a system installation tape. > > I do not know well the subject yet, I don't found clear information about > the compatibility of my clone with the original RDOS from Data General. > Thus, before trying the impossible, I would like to know if another OS are > available for my machine ? > > I would like to be able to do basic things like : > > - Be able to manage my devices, copy files from tape to disk or vice versa. > - Be able to list directories, create subdirectories. > - Write and read text files that I could send on my drum printer. > - Have some communication software, tty, rs-232 (for the day I find a comm > board). > - Some diagnostic tools to check core memory, disk, tapes. > - Being able to write in a simple programming language such as BASIC would > be great. > - Be able to use simultaneously more than one Entrex terminal. > - Maybe a database software ... ? > > Of course I am also interested in anything that goes beyond that. I also > have more bizarre projects with this machine like generating algorithms to > trace small animations on an analog oscilloscope and ... well, another > chapter ;-) > > > To recap, here the specifications of my system: > > Computer : D-116, clone of a DG Nova 1230 with 17 slots, also known as > "Entrex 480" and "Nixdorf 620" > Core memory : 64 kW > Terminal : ENTREX DATA/SCOPE > Disk Cartridge : Diablo Model 40 > Mag-tape : Pertec 8840A (800 bpi) > Line drum printer : Data Products model 2230 > > As the machine was distributed by Nixdorf, the identification of the tape > and disk controllers is a bit difficult, but I can take detailed pictures. > > Thanks a lot for your help ! > > Dominique > >

6 years, 11 months

SOT - Ultimate Classic Computing Geekdom

by trash80＠internode.on.net

Hi folks - the family surprised me for Christmas by all contributing to some custom plates for my new car. This might tell you how well they know me. http://koken.advancedimaging.com.au/index.php?/albums/274143f7eae640a16c276… Kevin Parker P: 0418 815 527

6 years, 11 months

DECtape archeology.

by mattislind＠gmail.com

I saw Pauls post about old DECtapes which reminded me about a bunch of DECtapes I had lying here. On my workbench I have a PDP-11/10 with TC11 and TU56 setup which works nicely so I decided to image a few more DECtapes. For those interested in old diagnostics and other things it can be worth looking into. http://storage.datormuseum.se/u/96935524/Datormusuem/dectapes-1.tgz Some comments: I have not tried to boot any tape natively since my M9312 need a TC boot PROM, need to burn one. I have tried to boot most of them in SimH, but many of them fail with a HALT somewhere. Need to test this further on real hardware as soon as I have a TC bootstrap. D1.DSK had an I/O Error so it is not the full dump. D2.DSK however boots to a prompt: DDP1-V001 28K RSTRT: 155766 .DIR . DIR .BIN 003 17-NOV-71 DTCOPY .BIN 006 17-NOV-71 D0AA .BIN 014 17-NOV-71 What is DDP1-V001? Some early diagnostics monitor? The filesystem seems to be DOS-11 as RT-11 FILEX is able to read the directory with /S D5.DSK is also a DOS-11 file structure and apart from quite some diagnostics also contain FOCAL1.BIN DT5.DSK contain a binary MOON.BIN which according to the label is some variant of Moonlander / Lunarlander. So, yes. I do have a system up and running that can Image that RSX11-D VT30 tape if needed. However it will be moved on the 27th of January. /Mattis

6 years, 11 months

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test-drb January 2018