test-drb June 2000

test-drb@ccmp.vtda.org

160 participants
580 discussions

by fmc＠reanimators.org

Carlos Murillo-Sanchez <cem14(a)cornell.edu> wrote: > Thanks a lot for all this! The cable halves that I have > are marked either "12966-60015 ASYNC DATA STRAPPED FOR 9600 BAUD" > or "12966-60008 ASYNC DATA". Fortunately, the numbering in the > back of the card edge connector corresponds to the 1-24 (top, left > to right) and A-Z,AA-BB (bottom, left to right) numbering. The 60015 > option has quite a few more cross-connects than the 60004 option. This time around I'm looking at a newer (April 1984) revision of the same manual and it has three (!) descriptions of the -60015 cable, two for HP 2621B terminals, and one for HP 264X terminals. Cross-connects inside the card-edge hood appear the same for all descriptions of this cable: (F, X, Y, AA) (H, K) (N, 8, 12, 13, 14, 15) (these strap it for 9600 baud) (W, 5) (4, 21) (11, 22) And for the far end of the cable, the 2621B flavors looks like they could be going to a DB25: A -> 7 (Signal Ground) D -> 3 (Transmit Data) E -> 5, 6 (Request to Send) F -> 8 (Data Terminal Ready) S -> 2 (Received Data) X -> 4 (Clear to Send) -60008 looks like it's supposed to be for a 264X terminal (to the card-edge connector on the datacomm board) and has slightly different cross-connects: (A, 1, 12, 13, 14, 15) (F, X, Y, AA) (H, K) (N, 8) (W, 5) (4, 21) (11, 22) As far as I can tell, this is strapped for external clocking from the terminal. I guess it's time for that table about how to strap for a baud rate: Baud Rate Bit Yield Pin 8 to pins: Pin 1, A, 24, BB to pins: Ext (16X) 0000 N 12, 13, 14, 15 50 0001 14, N 12, 13, 15 75 0010 13, N 12, 14, 15 110 0011 13, 14, N 12, 15 134.5 0100 12, N 13, 14, 15 150 0101 12, 14, N 13, 15 300 0110 12, 13, N 14, 15 600 0111 12, 13, 14, N 15 900 1000 15, N 12, 13, 14 1200 1001 14, 15, N 12, 13 1800 1010 13, 15, N 12, 14 2400 1011 13, 14, 15, N 12 3600 1100 12, 15, N 13, 14 4800 1101 12, 14, 15, N 13 7200 1110 12, 13, 15, N 14 9600 1111 12, 13, 14, 15, N -- > Looks like the labeling of TD and RD signals in your docs > indicate that the card thinks of itself as DTE, and the cable > that you describe is actually a null modem-like cable w/o > handshake. All this should be enough for me to build a simple > cable and test this over the weekend. That would be about right, I think. The HP terminals that I'm familiar with generally had cables whose far ends were a DB25 plug that wanted to plug into a DCE-flavored connector. Good luck! -Frank McConnell

25 years

Blah this is no longer about Tek anything so die subject line die

by xds_sigma7＠hotmail.com

a 20 year old MicroVAX II?... That's pretty amazing, since the MicroVAX II is 1986ish or so... MicroVAX I isn't even 20 years old yet, getting close, but not there. Just my two cents worth of picking nits. Will J ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

25 years

A Great Find & A Defense of E-Bay

by dhquebbeman＠theestopinalgroup.com

Good morning, all... The subject line above might be a bit misleading. In the short time I've been subscribed to the list, I've seen a lot of negative criticism of E-Bay, or rather, of trying to buy things found on E-Bay. The criticisms all seem to concern how much an item on E-Bay ends up costing. What I guess I haven't seen said here is an acknowledgement that the high prices are a result of parties bidding against each other. I realize that in some cases, some shill bidding may be going on, but most of the time, I think I'm just seeing prices go high because people really want an item. Now, as to why an original IMSAI will go for $1200 when you can take about $800 and buy a brand new one with a Z-80-descended processor and a meg of bank-switched RAM, is beyond me. OTOH, I see SOLs going for for high prices, and they don't make those anymore. But I've been able to find great buys on items that aren't quite so popular, like TI Silent700 terminals, older wide-carriage printers, and so on. Having said that, one item I'd been trying to buy for a while is a Wyse 50 terminal, with a preferences for an amber screen. The ambers seem to be more rare, and command a higher price on E-Bay. Everytime one is for sale, someone goes over my max price, and I don't get a terminal. So, I decided to surf the web more broadly one day (and not specifically looking at other auction sites), when lo and behold, I find a guy up in Michigan who has an amber Wyse 50 for sale; he threw in a modem and a serial cable and shipped it to me for a mere $25.00. It's a clean unit with no visible screen burn. The F13 keycap comes off easily; other than that, it's a fine example of what became my favorite computer terminal. In closing, I'd say no one should limit themselves to searching only at *any* auction site, but I wouldn't avoid E-Bay just because prices sometimes range too high. regards, -doug quebbeman

25 years

Apple III (was: Apple III motherboard)

by mgregory＠vantageresearch.com

-----Original Message----- From: John Wilson <wilson(a)dbit.dbit.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Friday, June 16, 2000 8:14 PM Subject: Re: Apple III (was: Apple III motherboard) > >Was the /// the machine whose user manual suggested that you should drop the >entire computer on a desk from a height of several inches before powering it >on the first time, to give all the internal connectors a chance to chew >through the oxide? Wild... > Given the weight of a ///, you might fix the computer, but you'll damage the desk! It wasn't just the first time, IIRC. The ///s also had notoriously bad sockets, and lousy cooling, so the chips had a tendency to wiggle out over time. So you might have had to repeat the Apple drop every six months or so. Any other examples of semi-official fixes like this one? The only other one that comes to mind is the infamous "Atari ST twist", where you grasped both sides of the case firmly, and twisted the ends in opposite directions. The flexing of the motherboard supposedly reseated a chip that frequently came loose, without, of course, requiring you to open the case, and thereby void your warranty. Madness! Mark.

25 years

KXT11-AB, T11

by CLASSICCMP＠trailing-edge.com

>anybody out here has the KXT11-AB Manual ? > >Any documentation about the T11 chip ? I've got the KXT11-CA book on microfiche. Is that close enough? -- 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

Apple III (was: Apple III motherboard)

by SUPRDAVE＠aol.com

In a message dated 6/17/00 9:25:28 PM Eastern Daylight Time, eric(a)brouhaha.com writes: > > Hmm, that actually sounds a bit familiar. I kind of think I vaguely > remember > > reading magazine articles in the early 80s about the /// being > discontinued > > and then re-introduced in "new & improved" form. But I wouldn't know... > > The Apple ///+. Very short product life. > > > Was the /// the machine whose user manual suggested that you should drop > the > > entire computer on a desk from a height of several inches before powering > it > > on the first time, to give all the internal connectors a chance to chew > > through the oxide? Wild... > > Not in the user manual, but some people did it. The problem was that Apple > used bargain-basement DIP sockets on the early machines. In shipping the > chips would work loose. Back then there shouldn't yet have been too much > trouble with oxidation, but there certainly is now. The "correct" fix is > obviously to open it up and reseat the ICs. not only that, but the memory board is mounted above the main board on metal standoffs with no other support. (at least on the 256k /// i had) Over the years, that board had become permanetly warped due to sagging in the middle and the attachment screws being overtorqued. DB Young ICQ: 29427634 hurry, hurry, step right up! see the computers you used as a kid! http://members.aol.com/suprdave/classiccmp/museum.htm

25 years

Apple III motherboard

by dhquebbeman＠theestopinalgroup.com

> Speaking of searches, I have been searching and searching > for an Apple III motherboard. Mein ist kaput, I am afraid. > Anyone have a spare they would like to part with? Louis- Not meaning to be rude, but even when they work, an Apple /// is kaput. Are you aware of how buggy those things were? Did you ever do any extensive programming for one? Again, sorry, I truly mean no offense, but I grew to loathe Apple for making this machine, and it's a wonder that I was able to overcome that loathing and buy a Mac. -doug quebbeman

25 years

E-mail style (was Re: Tek 4014/5 emulation)

by fmc＠reanimators.org

ard(a)p850ug1.demon.co.uk (Tony Duell) wrote: > Seriously, unless there are very good reasons not to, people who send me > HTML mail get ignored (especially if they're asking me for help). And > this will continue. Tony's getting close to the point here: when you post to a mailing list or a newsgroup, you're writing for an audience. If you want your message to be read, you should make it easy for that audience to read the message. Else you run the risk that your audience will not bother, there being 72 other unread messages in the classiccmp in-box this morning. If what you're going on about isn't obvious to me somewhere in the first screenful or two, I'm going to hit the 'n' key and move along. Putting something relevant in the Subject: header can help me make a more informed decision. So can trimming quoted text to just the relevant portions: if I see a couple or three screenfuls of quoting, or can't tell whether I'm seeing quoted or original text, I begin to wonder whether it's worth looking further for something new. Same if I can't find the text for all the markup tags. -Frank McConnell

25 years

VAXStation VLC's still available

by kyrrin＠bluefeathertech.com

CC to CLASSICCMP and port-VAX... Hi, folks, As of last weekend, when I was at RE-PC, I noticed that the VAXStation VLC pile still seemed to be the same height. My guess is that the initial asking price was high enough to scare people off. Well, let me put it this way. Mark (one of RE-PC's owners) probably needs the floor space a lot more than the VAXen, so make an offer on a VLC while they're still there! I suggest starting at $20-$25 plus shipping. Since the VLC pile hadn't moved, I'm willing to bet that the 4000/90 is still at the bottom of it. If you want to get in on this, give Mark Dabek a call (206-575-8737), tell him I referred you, and go from there. Thanks much. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner and head honcho, Blue Feather Technologies http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com Amateur Radio: WD6EOS since Dec. '77 "Our science can only describe an object, event, or living thing in our own human terms. It cannot, in any way, define any of them..."

25 years

Haggle stuff

by kyrrin＠bluefeathertech.com

Oh, BTW, I almost forgot... I have a couple of books up on Haggle under 'Antique Computers.' One of them is an HP binder with a few CE manuals in it that cover, among other things, the 7000-series disk drives, and the other is a DEC book: "Programming in VAX-11 C". The H19 terminal is still there, no bids yet, and there's also a head-mounted display for PCs made by Reflection Technology (it's dated from around 1989, so it meets the ten-year rule). Thanks much. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner and head honcho, Blue Feather Technologies http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com Amateur Radio: WD6EOS since Dec. '77 "Our science can only describe an object, event, or living thing in our own human terms. It cannot, in any way, define any of them..."

25 years

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test-drb June 2000