test-drb August 1999

test-drb@ccmp.vtda.org

161 participants
565 discussions

by ethan_dicks＠yahoo.com

--- Eric Smith <eric(a)brouhaha.com> wrote: > > DS8641N > > > > There is no vendor ID, just a little mark like 2 lightning bolts in > paralell > > (Like a jagged = sign). So, the questions now are... > > > > 1. What's this chip, and what does it do? > > 2. Can I replace it, or am I just screwed? > > National Semiconductor Quad Unified Bus Transceiver. Commonly used > as a Unibus transceiver. Still in production. National lists budgetary > pricing for quantity 1K at $1.15, which means you'll probably pay less > than $4 for a single. > > http://www.national.com/pf/DS/DS8641.html > > I was surprised to find that DigiKey apparently does not stock it. I have several tubes of them. Make offer. -ethan === Infinet has been sold. The domain is going away. Please send all replies to erd(a)iname.com _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

25 years, 4 months

RT-11 ARGH!

by CLASSICCMP＠trailing-edge.com

>Is a RT-11 Media Kit on TK-50, that was built under V5.4 using some command >which currently escapes me, bootable? If it was built with MUB.COM, yes, it is bootable. > I just realized that apparently V5.3 >doesn't support TK50's. Right, it doesn't. > BLEEP!!!! > I'd just try it, but don't want to have to type in the bootstrap if it > isn't. Rather spend the time trying to figure out the best sequence of > hoops to jump through if it isn't! BEEEEEEEEEEEEP! Just when I was > starting to make some serious progress at getting my /73 put back together. > BLEEP! I have to admit that I'm a bit unclear on what the problem is that you're trying to solve, much less what you're trying to do to overcome the difficulties that you're throwing in your own path :-). -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

25 years, 4 months

RT-11 ARGH!

by CLASSICCMP＠trailing-edge.com

>> > If it was built with MUB.COM, yes, it is bootable. >> Thank Goodness! > >Jerome Fine replies: > >Is that just the requirement to copy certain files onto the TK50 >tape in a certain order? No, it also needs the appropriate boot block written to tape (by, for example, the $Ini/Que/Vol/File:Bin:MBOOT.BOT Kit: line in MUB.COM). -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

25 years, 4 months

New IMSAI available in October

by rcini＠email.msn.com

Hello, all: Todd Fischer announced the IMSAI 8080 Series Two today. See http://www.imsai.net Looks interesting. Expensive for no cards, but interesting. Rich ----------------------------------- [ Rich Cini/WUGNET [ ClubWin!/CW7 [ MCP Windows 95/Windows Networking [ Collector of "classic" computers [ http://highgate.comm.sfu.ca/~rcini/classiccmp/ <---------------------------- reply separator

25 years, 4 months

Is ccauction@nut.net dead?

by ss＠allegro.com

Hi, My last two attempts to email ccauction(a)nut.net have apparently failed because "nut.net" can't be found. Well, to be more exact, the MX record for nut.net doesn't seem to exist. nslookup nut.net gives: Non-authoritative answer: Name: nut.net Address: 209.114.81.2 But, nslookup -type=MX nut.net gives: Server: bart Address: 0.0.0.0 (timeout) A "whois" shows that nut.net's record was updated yesterday.

25 years, 4 months

Williams Tube memory, Selectron question, and Charactron

by CLASSICCMP＠trailing-edge.com

Eric Smith wrote: >William Donzelli <aw288(a)osfn.org> wrote: >> The lights ("blinkenlights") on some early machines (and even a few not >> so early machines) were tiny tubes, as well. A bit more simple than a CRT... > >Yes, but those weren't particularly "bizarre". They were just common >incandescent bulbs. I've seen scientific and computer equipment from the 60's and 70's using a variety of "tubes" as indicator devices, everything from simple neon bulbs to decatron counters and storage CRT's. One might argue that a neon bulb or a decatron isn't properly a "tube" (they certainly aren't "valves" because they don't have a control grid like a triode), but they are non-linear devices that are capable of storing (and displaying) state information and performing simple logic functions. Question for the UKer's: is a tube rectifier (no control grid, just an anode and a cathode) called a "valve"? Is a voltage regulator tube (like the venerable OA2) called a "valve"? -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

25 years, 4 months

Article on old software programs (for IBM, Apple, Borland, etc)

by SUPRDAVE＠aol.com

In a message dated 8/16/99 3:34:45 PM Eastern Daylight Time, bill(a)chipware.com writes: > "Software Program" > > AAARRRGGG!!! > > Why don't we get in the automobile car and drive ride to the > financial institution bank. There we can get some cash currency > from the ATM machine. I may have to transfer send some money funds > to my IRA account. After that we can go to the movie theater cinema > and purchase buy some admission tickets. After we see the movie > production, we can go to a restaurant bistro and eat consume some > dinner food. We could get a nice container bottle of wine beverage. > > Sorry to rant, but I'm in a bad mood. hey, at least it was good for a laugh... D.B. Young Team OS/2 -->this message printed on recycled disk space visit the computers of yesteryear at: http://members.aol.com/suprdave/classiccmp/museum.htm

25 years, 4 months

IBM 5100

by uiterwyk＠eisers.com

I am desperately looking to fill the last hole in my "machines that I have worked with" museum. An IBM 5100 - This machine used two 1/4 inch tape drives and had either Basic or APL (or both) in ROM. Inbtroduced in 1975 by IBM. Will trade old early hobbyist PC stuff (SWTP 6800, SOL-20, Osborne OCC-1) or pay money. Anyone out there willing to help me relive my youth? Robert Uiterwyk uiterwyk (at) eisers (dot) com

25 years, 4 months

Williams Tube memory, Selectron question, and Charactron

by CLASSICCMP＠trailing-edge.com

>> Question for the UKer's: is a tube rectifier (no control grid, just an >> anode and a cathode) called a "valve"? > Have you heard of a check valve? I've also heard of a won't gate and have a copy here of the data sheet for a write-only-memory :-). -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

25 years, 4 months

Williams Tube memory, Selectron question, and Charactron

by allisonp＠world.std.com

<I think we'd probably call an OA2 a 'valve' as well, although talking <about 'stabiliser tubes' or 'cold cathode tubes' seems to be common usage <in UK books as well (as is 'stabiliser valves' and 'cold cathode valves'). < <We certainly talk about 'counting tubes' when refering to dekatrons, <trochatrons, etc. Never seen them called 'counting valves'. And CRTs are <certainly 'tubes' over here. Lest we for get the 2d21 tyratron and the larger cousins. Cold cathode triodes mostly replaced with SCRs. Allison

25 years, 4 months

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test-drb August 1999