test-drb

test-drb@ccmp.vtda.org

101090 discussions

by lbickley＠bickleywest.com

On Fri, 09 Jan 2015 17:25:26 -0800 jwsmobile <jws at jwsss.com> wrote: > > On 1/9/2015 10:43 AM, Bob Rosenbloom wrote: > > I believe these are the same ones advertised a year or so ago. > > Lyle and I went to see them and found a storage building piled > > to the ceiling with stuff. It was impossible to see what was > > actually there, though what could be seen had heavy water damage and > > looked to be in bad shape. At the time he was asking $5000 for > > it all so we just walked away. Might be a lot cheaper now. > > > > Bob > > > > > > On Friday, January 9, 2015 10:27 AM, Jason T <silent700 at gmail.com> > > wrote: > > > >> > >> Not mine, not near me, not known to me: > >> > >> http://sfbay.craigslist.org/pen/sys/4837367667.html > >> > >> > >> > > > I talked to the owner for quite a while tonight and got some > information. He is very interested in moving it and is sending > photos. He said someone is coming to take a look at it tomorrow in > Freemont. I will post the photos he sends me tonight. > > I hope someone buys it for other than gold. I am not set up to > address this sort of a deal myself, and am passing the info along to > who may be able to. > > I told him about cctalk and ibm vintage lists, so if you are on that, > that is the secret handshake as far as what I told him, vs. a scrap > dealer. When Bob and I initially talked to the owner, he told us that what he had was a major find for a collector. He spoke in glowing terms as to the condition of the 4341 and the HP mini (de-installed from a running environment and then stored for many years). So as you would expect, Bob and I were very anxious to see both systems. What we found was a serious disappointment. As Bob said, the 4341 and the HP mini were crammed into a storage unit with lots of other junk. It was impossible to see/determine what system components were actually there. There was no way to know how complete or what features either system had. Repeating what Bob said, everything was water damaged, rusty and in poor condition - and I do mean everything. We told him that his asking price was too high - and that the condition of the systems was so bad we wouldn't even make him an offer. Lyle -- Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"

11 years, 7 months

Reverse engineering vintage PCBs

by mark＠markesystems.com

> From: Alan Hightower <alan at alanlee.org> > > I appreciate all the input from folks. With 3600 though holes and at > least 4 layers, I'm afraid I will make mistakes using any manual method > like ohm tracing without a check or balance. With so many permutations If it is indeed a four-layer board, there's a pretty good chance that the inner two layers are power and ground; if so, your project just got a lot easier. You can just hold it up to a strong light source - if it's completely opaque, then the inner layers probably are power/ground planes. If not, then at least you can see the traces (although without knowing which layers they're on...). ~~ Mark Moulding

11 years, 7 months

Reverse engineering vintage PCBs

by alan＠alanlee.org

Does anyone have any past experience reverse engineering an existing de-populated PCB into a scan, netlist, or similar? Any lessons learned positive or negative? I have a AT&T 3B2 310/400 main board that is beyond salvaging into a working system. A previous owner has also removed the socketed parts including the Western Electric chip set. I'm unable to find working schematics of most of the 3B2 cards and main boards. So I'm considering bulk de-populating the remainder of the board in an oven and trying to derive a schematic from it. It's a fairly large board but appears to be 100% through hole. I roughly estimate it contains ~3500 through holes. And guessing it is 6-10 layers. Thus running it through a single vector x-ray machine would not be very useful. I've brain-stormed several ways it can be done from de-laminating the board, building a 2D bed of nails armature, mirroring the board holes on a new mated PCB with 3 dozen FPGAs, etc, etc. But I'm seeking advice >from those who've done it already. Thanks, -Alan

11 years, 7 months

Seeking... TI TMS9902 ICs

by mhs20165＠yahoo.com

google "instant input assembler" and you may find more information. the book was "16-bit microprocessor architecture" by Terry Dollhoff - written in 1979. google "16 bit microprocessor architecture" and you may find links. the book may be available on Amazon and other places. possibly interesting reference to the computer it was installed on at http://archive.org/stream/kilobaudmagazine-1979-07/Kilobaud_Microcomputing_… - look for "instant input" - they talk about the computer it came on. that company (Technico) has been out of business since sometime in the early 1980s.

11 years, 7 months

B & C Microsystems

by aek＠bitsavers.org

Was digging though storage this week and found a B&C Proteus. Did anyone save the contents of their BBS? I see I scanned the manual for the 1409 at some point, but I don't seem to have any other docs or software from them.

11 years, 7 months

DTSS Simulator BASIC Programming Contest - 2015 CoCoFEST

by computerdoc＠sc.rr.com

Hi Everyone! Here is a reminder that the Glenside Color Computer Club is holding a BASIC Programming Contest using the Dartmouth Time Sharing System Simulator honoring the Creation of the BASIC Computer Programming Language at the 2015 CoCoFEST this April 25-26, 2015 in Lombard, IL at the Heron Point Building. See the link below for details of the Contest and click on ?CoCoFEST? on the left for further details of the CoCoFEST itself. http://www.glensideccc.com/cocofest/events.shtml I?m looking forward to seeing you at the CoCoFEST! Kip Koon computerdoc at sc.rr.com http://www.cocopedia.com/wiki/index.php/Kip_Koon

11 years, 7 months

Novell NetDevice NAS?

by BHuntsman＠mail2.cu-portland.edu

Any ex-NetWare guys on here? Anyone ever see or hear of a product called Novell NetDevice NAS? Ever used it? Thanks! -Ben

11 years, 7 months

Old Computer Logs!

by jacob.ritorto＠gmail.com

I got one for my birthday: https://plus.google.com/104356262816556231009/posts/3GF1d8nQGQD

11 years, 7 months

olivetti programma 101 repair

by r_a_feldman＠hotmail.com

> Message: 16 >Date: Wed, 07 Jan 2015 15:21:07 -0800 >From: Chuck Guzis cclist at sydex.com >On 01/07/2015 02:41 PM, Simon Claessen wrote: <snip> >> Guitar wires are out. They are way to flexible. I opted for fosfor >> bronze wire, but could not find it in the shops in Amsterdam. Then I >> stubled upon a shop selling beads and stuff to make bracelets and >> earrings. They sell "memory wire", A very tough silver coated wire of >> 0.6mm. I have no idea what the alloy is, but the mechanical >> characteristics are not bad. > >Drop in to a good musical instrument repair shop. Flutes, for instance, >use phosphor bronze wire springs; clarinets tend to use stainless steel >springs; dulcimer wire is typically phosphor bronze. I've even used >harpsichord bronze wire to fashion pins to convert a SIMM to a SIPP. It >solders well. > >An instrument repair shop is also an excellent place to fine flat blue >steel springs. > >--Chuck A good model railroad hobby shop should also have phosphor bronze wire. It is used to model overhead wire for trolleys/trams. Bob

11 years, 7 months

Answer: Weekly Classic Computer Trivia Question (20150105)

by dpi＠dustyoldcomputers.com

As many of you noted it is a phrase that contains every letter in the English language alphabet called a pangram. I first encountered this phrase in high school typing class. For me it became computer related when I was watching the Teletype repair man work on the KSR-35 attached to a PDP-8 sometime in 1974 or 75. I am sure it was something like that for many of you. Doug Ingraham PDP-8 S/N 1175 On Sun, Jan 4, 2015 at 9:04 AM, Doug Ingraham <dpi at dustyoldcomputers.com> wrote: > Time for another trivia question. We will start off the year with an easy > one. This one is related to computers but not exclusive to computers. > > What is the significance of the phrase: > > The quick brown fox jumps over the lazy dog. > > No fair looking it up on the internet. > > Doug Ingraham > PDP-8 S/N 1175 >

11 years, 7 months

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