test-drb

test-drb@ccmp.vtda.org

101090 discussions

by mcquiggi＠sfu.ca

Tell the group what you're trying to do, based on your requirements there are several alternatives! What type of application is this for? Kevin On Tue, 22 Feb 2000 16:06:49 -0500 classiccmp(a)classiccmp.org wrote: > Hi, > > Once again demonstrating my vast quantities of ignorance... > I need a diode which completely blocks current in one direction > and presents as little resistance in the other direction > as possible. I bought a fist full of little glass ones at > Radio Shack for 50 cents. On my Ohm meter, they show no > conductance in one direction and 1400KOhm the other way. > What do I need to get? RS (which is the only resource I > have available, I need them like _NOW_) has many different > kinds of diodes, ranging up to two dollars per pair. > > Thanks, > Bill Sudbrink

26 years, 1 month

11/785 available

by oliv555＠arrl.net

For anyone that may be interested, a posting just came up on comp.sys.dec.micro offering (free) a VAX11/785. No location specified. Did'nt copy over his text as im not sure if its 'kosher' to do so without posters permission. Good luck, Nick

26 years, 1 month

Some h/w free for shipping and some s/w FS.

by kstumpf＠unusual.on.ca

Still trying to empty free-up space in my "ware"house. If you would like an HP-IB cable or the tilt/swivel base for the original IBM PC monitor, please send your mailing address to me in a private message. First come first served. I'll confirm things with you and tell you the shipping costs. Also have a complete copy of PC Tools Version 6 for US$8 plus shipping, and something called Software Carousel (1987) for US$5 plus shipping. Please send a private message to me if you are interested. Yours in good faith. Kevin Stumpf - The Nostalgic Technophile www.unusual.on.ca - 519.744.2900 EST/EDT (GMT - 5) Author & Publisher of The Guide to Collecting Computers and Computer Collectibles: History, Practice, and Technique

26 years, 1 month

TI DS990/1

by aek＠spies.com

there is a dissassembly of the boot rom for the 990/4 up at www.spies.com/aek/orphan.html now, along with one for the 990/12. If you have a way to dump the boot proms, it would be interesting to see how similar they were. If you have a way to take pictures of the boards, I'd be curious to see what the I/O cards look like, esp the floppy controller board.

26 years, 2 months

How many Vaxes?

by ethan_dicks＠yahoo.com

> ----- Original Message ----- > From: Dan Kolb <daniel.kolb(a)corpus-christi.oxford.ac.uk> > To: <port-vax(a)netbsd.org> > Sent: Tuesday, 22 February 2000 5:20 > Subject: Re: How many Vaxes? > > > On a semi-related note, what sort of Vaxen do people on this list My list of personal VAXen: 1 MicroVAX-II in BA-123 w/9MB & RD54 (154MB), TQK50 and TU80 (Dilog controller), SRC COMBOARD-Q, DZV-11, uninstalled KDA50, running VMS 6.1 1 MicroVAX-II in BA-23 w/9MB & RD54, KDA50, DZV-11 and DEQNA, running VMS 5.5 1 MicroVAX-I in BA-23 w/4Mb & RD52, DZV-11 running MicroVMS 4.2 1 MicroVAX-I parts machine 1 VAX 8300 w/16Mb & RA81 (450Mb), 3rd party SDI-to-ESDI bridge w/two 1.2GB ESDI disks, KDB50, unresponsive DEBNT (cable problems?) running VMS 5.5 1 MicroVAX 2000 w/10Mb? & RD54, DHT32 8-port expander, TK50Z-FA 1 MicroVAX 2000 untested w/external RD54 box 3 VAXstation 2000 untested w/mice, keyboards, mono monitors. 1 VAX-11/750 w/8Mb & RA81 w/DMF-32, Massbus interface (TU78 is 220V and was not moved with CPU), SI9900 disk interface w/Fuji 160Mb+Eagle disks, multiple Emulex 16-port serial cards, UDA-50, 56K DEC sync card for DDCMP, RUX50 interface, TU80 interface, LP11 interface, s/n BT000354, running VMS 4.5 1 VAX-11/750 w/14Mb, multiple DZ-11, TS-11 controller, Massbus controller, SI 9900 controller, Fuji Eagles and RM03s not moved with CPU due to transportation problems. 1 VAX-11/730 w/5Mb & RB80 (121Mb), DMF-32, VMS 5.4 With all of that, only one MicroVAX-II, one MicroVAX 2000 and the VAX 8300 have been powered on in the past year. The Unibus VAXen are in deep storage. On the way is a VAXstation 3100-90 w/64MB and 1.5GB disk, TLZ30 and TK50Z-GA, but no ETA as of yet. :-( -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 2 months

Diode help... HELP!

by bill＠chipware.com

Hi, Once again demonstrating my vast quantities of ignorance... I need a diode which completely blocks current in one direction and presents as little resistance in the other direction as possible. I bought a fist full of little glass ones at Radio Shack for 50 cents. On my Ohm meter, they show no conductance in one direction and 1400KOhm the other way. What do I need to get? RS (which is the only resource I have available, I need them like _NOW_) has many different kinds of diodes, ranging up to two dollars per pair. Thanks, Bill Sudbrink

26 years, 2 months

TI DS990/1

by jbdigriz＠dragonsweb.org

Today's acqisition here is a TI DS990 Model 1 Intelligent Terminal. This designation appears to be a complete misnomer as it is in fact a full microcomputer. The case appears to be laid up in fiberglass from the same mold as a TI 820 KSR, and the logic bus has 86 pins, which I recall >from other terminals of the late '70s, but it has a 3 Mhz TMS9900 processor (nice BIG white ceramic JDL part with gold pins), 64K of ram (4116's, plus parity), a TMS9900 based I/O controller board, 2 asych serial cards, floppy disk controller, and a VDU controller. Going by the configuration table on the back of the case there were other options available as well, including "GPH", which I am wondering whether might be some sort of bit-mapped graphics display. The backplane has a total of 12 slots, 7 occupied. There are what appear to be 3 serial connectors on the back of the case, but they do not connect directly to the serial cards. They go through the bus apparently. I've never had my hands on an 820, but I don't think they're this elaborate, and the 911 VDT's I have certainly aren't. Nice hefty modular 200W linear power supply with its own bus, too. This particular unit has seen some rough handling at some point, and is missing a few keycaps, but it is clean, and powers up. There's a nice raster on the screen, but no cursor. Apparently it must boot off a disk. There's a 25 pin connector on the back of the case which must be for a cable to a FD800/1000 dual 8" drive (which I don't have yet). The "IDLE" and "EXEC" lights on what amounts to a minimal front panel on the keyboard light up, but that's it. No "ERR", anyway. Somebody please correct me if I'm wrong, so I can track down the problem. In actual use, from what I was told, it was probably hooked up by modem to Tymshare, the predecessor of Tymnet, and thence to a central facility. It has lttle bezels on the front shoulders of the case that identify it as a Tymshare Travel Business System BS2000. As an aside, I did a little searching, and apparently MCI/Worldcom is still running Tymnet, now on rackmount Sparc-based nodes rather than the earlier PDP-10's.and M68K's (I preferred Telenet for X.25; they were always a year or two ahead on dial-in speeds where I was.) Anyway, if anyone has manuals or software, in particular a bootable system disk, for this machine, I'm all ears. Likewise, if anyone has any questions about it, I'll do my best to answer them. jbdigriz -- ---------------------------------------------------------------- DragonsWeb Labs - Custom R&D, Software, & Hardware ---------------------------------------------------------------- Tagline for Tuesday, February 22, 2000 If rabbits feet are so lucky, what happened to the rabbit? ---------------------------------------------------------------- James B. DiGriz - jbdigriz(a)dragonsweb.org - (912) 653-5139 ----------------------------------------------------------------

26 years, 2 months

Information still needed for Infotron IF/65 Development System II for 65XX microprocessors and CUBIT EPROM Programming board - AIM-65 or KIM ?

by elvey＠hal.com

Hi All I just made a mistake in sending to the group. I only meant to send to Bill. As it turns out, ther was no issue. Bill had borrowed the picture. I hope no one takes it against hxho(a)pacbell.net. He only loaned the picture and I was just checking the double match. Please forgive me Dwight

26 years, 2 months

Diode help... HELP!

by edick＠idcomm.com

Actually, germanium diodes, e.g. 1N43A, 1N270, etc, have a forward voltage on the order of 0.32 volts. There are numerous SCHOTTKY diodes with considerably lower forward voltage. Check the DigiKey catalog for possible candidates. Their catalog lists forward voltage as a characteristic. Dick -----Original Message----- From: Jack Noble <apple(a)cmc.net> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Tuesday, February 22, 2000 3:39 PM Subject: Re: Diode help... HELP! >Germanium diodes have the least amount of voltage drop while conducting >(about .06 volts I think) and a popular one that should be readily available >is the 1N34 or 1N34A. The reason that diodes seem to act funny on an >ohmmeter is because of the fwd voltage drop while conducting. The silicon >diodes that you probably got at radio shack have a fwd drop of more than .5 >volts and will appear as a high resistance to your meter even though they >are conducting. Hope this helps > >Noble >-----Original Message----- >From: Bill Sudbrink <bill(a)chipware.com> >To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> >Date: Tuesday, February 22, 2000 1:44 PM >Subject: Diode help... HELP! > > >>Hi, >> >>Once again demonstrating my vast quantities of ignorance... >>I need a diode which completely blocks current in one direction >>and presents as little resistance in the other direction >>as possible. I bought a fist full of little glass ones at >>Radio Shack for 50 cents. On my Ohm meter, they show no >>conductance in one direction and 1400KOhm the other way. >>What do I need to get? RS (which is the only resource I >>have available, I need them like _NOW_) has many different >>kinds of diodes, ranging up to two dollars per pair. >> >>Thanks, >>Bill Sudbrink >

26 years, 2 months

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test-drb