test-drb

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101090 discussions

by jnc＠mercury.lcs.mit.edu

> From: Brent Hilpert > What about that little issue of writeable program storage? Just to clarify my understanding of your position, is a system with a CPU chip (say one of the 68K models) with only ROM not a 'stored program machine'? Noel PS: You really should look at the book ("ENIAC In Action"), and not rely on the articles; it's later, more coherent (not being split across a handful of papers), and much more detailed (e.g. it includes the instruction set for the 'programmed' version of the ENIAC).

8 years, 3 months

IBM 2501 + doc + spares available in EU.

by h.j.stegeman＠hccnet.nl

Hi, Available in the Netherlands a compleet IBM 2501 punch card reader with all IBM documentation and spares from a scrapped unit. Please contact me off-line if interrested. h.j.stegeman at hccnet dot nl. Regards

8 years, 3 months

ModComp II on Ebay

by billdegnan＠gmail.com

Ebay item 272914490265 This is a ModComp IIC I think. It's all broken up in parts and half assembled. I don't think new it was barely $18,000 though, but some day, maybe the seller will give up and put up a realistic price. Who knows what's in it exactly but generally it looks like a communications model with a 7 or 9 track tape unit. The point of ModComp was to build custom systems but if the info on this system does not exist on BitSavers, let me know and I will scan some docs. I have info on the part numbers from the photos. The ModComp docs talk about IBM system emulation vs. DEC, so think along those lines more so, this is *not* a DataGeneral / DEC me-too despite looking a little like a PDP 8i BIll

8 years, 3 months

Teletype's for Auction

by wsudol＠scng.com

For those who want/collect Teletype's, Here's 2 links to auctions. One is a pallet of pretty old stuff just labeled 'Teletype Machines' located in Dayton, Ohio https://www.bidspotter.com/en-us/auction-catalogues/thompson-auctioneers/ca… The other one says Teletype mdl. 43 Data Terminal and Computer w/ Desk This is in South San Francisco and has some other stuff with it. https://www.bidspotter.com/en-us/auction-catalogues/american-auctioneers-gr… Disclaimer, i have no affiliation to either site. In case the links don't go through, I found them through the "Bidspotter" site searching for "Teletype" https://www.bidspotter.com/ Wayne Sudol Riverside PressEnterprise A DigitalFirst Media Newspaper.

8 years, 3 months

Details about IBM's early 'scientific' computers

by jnc＠mercury.lcs.mit.edu

So, I was trying to find info about the early IBM 709/7090/7094 computers, but when I went to what is supposedly the authoritative work on these computers (among others): Charles J. Bashe, Lyle R. Johnson, John H. Palmer, Emerson W. Pugh, "IBM's Early Computers", MIT Press, Cambridge, 1986 I discovered there was very little technical detail about these machines there. Is there any other printed thing (yes, I know a few Web pages have some content) that anyone knows of that covers them in more detail? (I have a 709/7090/7094 programming thing coming, but that won't cover the internal engineering.) Yes, I know, I could look at the engineering manuals, but I was hoping for something in between them and Bashe et al. Noel

8 years, 3 months

Computing Pioneer Dies

by jnc＠mercury.lcs.mit.edu

> From: Evan Koblentz > That's the dumbest thing I read today. And that helped... how? Noel

8 years, 3 months

Computing Pioneer Dies

by blstuart＠bellsouth.net

On Fri, 11/10/17, Dave Wade via cctalk <cctalk at classiccmp.org> wrote: > https://www.theguardian.com/global/2017/nov/08/geoff-tootill-obituary This raises the question, is there anyone still alive from those first-generation projects? I had guessed that at age 101, Harry Husky was the last one still alive when he passed away earlier this year. To put a finer point on the question, is anyone who was involved with the original designs of the ENIAC, the Baby, the EDSAC, the Pilot ACE, the Z1, or the Harvard Mark I still with us? BLS

8 years, 3 months

Need VT-100 switch

by mattislind＠gmail.com

I know that this an old thread, but I had another VT100 with broken power switch and so I dug up what I used to buy. This has quick connect tabs so it is needs no modifications to fit. It has a metal handle and feels quite sturdy. https://www.mouser.se/search/ProductDetail.aspx?R=0virtualkey0virtualkeyST2… 2017-08-29 22:25 GMT+02:00 E. Groenenberg via cctalk <cctalk at classiccmp.org> : > > Thanks for the info. > I'm in the Netherlands, so no Home Depot branch here, but now I have seen > the picture of the replacement I can look locally or check with > digikey/farnell to see what they have in their catalog of switches. > > Regards, > > Ed > -- > Ik email, dus ik besta. > > > On Tue, August 29, 2017 21:47, Santo Nucifora via cctalk wrote: > > I've replied to this and helped someone else out before as it seems to be > > a > > frequent question. > > > > I've replaced two VT-100 switches with chrome "bat" handle switches from > > Home Depot in Canada shown here: > > https://www.homedepot.ca/en/home/p.t...000104171.html > > <https://www.homedepot.ca/en/home/p.toggle-dpst-20a-125vac- > of-1cd.1000104171.html> > > The one at the USA Home Depot is here: > > https://www.homedepot.com/p/Gardner-Bender-20-Amp-Double- > Pole-Toggle-Switch-1-Pack-GSW-14/100149490 > > > > I had to remove the screws and filed the terminals down a little because > > the terminals were a little wider than the original connectors but it > > works > > like a charm and will not break. It is almost a direct replacement > (except > > for the terminals needing some filing). > > > > You can probably pick one up on the way home if you are in North America. > > > > Hope this helps. > > Santo > > > > On Tue, Aug 29, 2017 at 3:38 PM, John Wilson via cctalk < > > cctalk at classiccmp.org> wrote: > > > >> On Tue, Aug 29, 2017 at 09:04:11PM +0200, E. Groenenberg via cctalk > >> wrote: > >> >Does somebody maybe have a spare switch of a VT-100 (the one at the > >> back)? > >> > >> If you get stuck, there's a switch that's made as a replacement part for > >> Fender guitar amps which, apart from having a metal handle instead of > >> plastic, is a very close match to the VT100 power switch. Really it's > >> what DEC *should* have used ... > >> > >> John Wilson > >> D Bit > >> > > > >

8 years, 3 months

Computing Pioneer Dies

by barythrin＠gmail.com

Can ya blame him? Back in his day 2s were *real* 2s.. bigger and tougher. You try and add 'em up, assuming they'd stay still long enough and stop wrastlin' with ya and who knows how big they'd be. -------- Original message --------From: Evan Koblentz via cctalk <cctalk at classiccmp.org> My own father does this and it drives me crazy. I'll say, "2+2=4" and he'll say, "I believe it's 5" ... DAD IT DOESN'T MATTER WHAT YOU FRIGGING BELIEVE, 2 PLUS 2 IS STILL 4!!!!!!

8 years, 3 months

HP 2640 character set generation manual in the UK

by curiousmarc3＠gmail.com

The link below is from the computer museum in Cambridge, UK, which seems to have a copy of an HP 2640 terminal manual I am looking for. Is anyone from that museum on the list? Does any of the UK members know them? http://www.computinghistory.org.uk/det/14373/HP-2640-Series-Character-Set-Ge neration/ Does anyone on the list have a copy of this manual? Marc

8 years, 3 months

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