test-drb February 2006

test-drb@ccmp.vtda.org

224 participants
452 discussions

Help with HP 4951B protocol analyzer + 18179A

by lee＠geekdot.com

> Sounds a little off. Cables are important, with impedance varying > with diameter, _Terminators_ are important, coming in the 50, 75 > Ohm varieties mentioned, but the connector itself being 50 or 75 > Ohm? First I've heard of this. True and important. Using the wrong impedance connector or cable end will cause a (sometimes insignificant) missmatch. The bigger problem though is that mating a low impadance plug with a high impedance socket, e.g. 50 ohm -> 75 ohm, will probably damage the socket due to the larger internal conductor diameter of the plug. Mating a high impedance plug with a low impedance socket, e.g. 75 ohm -> 50 ohm, will probably give a poor contact due to the smaller inner conductor diameter of the high impedance plug. Lee.

18 years, 5 months

Repairing wall warts

by cclist＠sydex.com

Maybe it's the Scrooge in me, but I've got a couple of wall warts (power supplies) that either have open fuses or dried up caps in them. They're either multi-voltage or have unusual enough ratings (e.g. 18 vdc @ 1500 ma) that I'm reluctant to scrap them. Does anyone have a sure-fire method for getting into the case such that it can be reclosed? I was thinking about using a saw blade on a Dremel to separate the case halves. Cheers, Chuck

18 years, 5 months

GHOST Graphics

by jim＠g1jbg.co.uk

Greetings While at college, I remember using a package called GHOST Graphics, which, in our case, was called from PASCAL programs that we wrote, in one case plotting a 3D surface which was output on Tektronix Graphic Terminals. The system we had has was a VAX cluster, and normal editing, compilation etc was done at a VT100 (we only had about 20 Tek terminals, for around 1500 engineering students - I've been there at 6.30 AM just to get time on the graphics terminals). I suspect that the software was running under VMS, and I vaguely remember using the standard editor to produce reports for assignments. Has anyone else used this package, or better still, have a copy? I'd like to be able to demonstrate this on my uVAX (if it will run the package) I still have the user manual somewhere (college produced and bound manual). Many thanks Jim. Please see our website the " Vintage Communication Pages" at WWW.G1JBG.CO.UK

18 years, 5 months

classiccmping and cold weather

by compoobah＠valleyimplants.com

What is the danger related to storing CC gear in extreme cold temperatures? This is not operating, and will be broght back to working temp range properly to prevent water condensation issues, but I have several computers in the (attached) garage with temperatures in the 20s. Any risks to drives (obviously electronics will be pretty immune). Sidenote- my bedroom got really chilly (50s), but fortunately I'm a CCer, so now it's Heated by HP :-) (No offense to DECcies, but 2xPA7100 is warmer than 1xKA660)

18 years, 5 months

M9058 RQDX signal distribution module

by dbetz＠xlisper.com

Does anyone know if the M9058 RQDX3 distribution module can be plugged into a CD slot on a H9276-A backplane or does it need to be in an AB slot? Thanks, David Betz

18 years, 5 months

DEMSA-AA Emulator

by jdoyle7＠gmail.com

Does anyone know where a software emulator or a hardware replacement for a DEC DEMSA AA can be found? Thanks John

18 years, 5 months

Problems booting a KDF11-BA

by dbetz＠xlisper.com

I'm trying to get my KDF11-BA (M8189) CPU to boot and have gotten past the memory test but the processor halts with an "03" in the LEDs. According to the manual, this means "waiting for console transmitter READY flag". Does anyone know what might cause this? I have a terminal connected to the console port set to the correct baud rate. I have also verified that all of the jumpers and switches on the CPU are set correctly (to their factory defaults). Any help would be appreciated! Thanks, David Betz

18 years, 5 months

eBay Item Not Won: Vintage Digital DECWriter IV terminal, DEC, serial (8761560822)

by legalize＠xmission.com

Umm... is this really the typical going price for a DECWriter IV, or is it another ebay frenzy? -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>

18 years, 5 months

MSCP SCSI cdrom behavior

by henk.gooijen＠oce.com

I *always* have the WRITE PROT button pressed on my RL02 when I boot XXDP. That's been told to me long ago, to make sure that if something goes wrong the pack will not be overwritten. Up til now, I never had problems mounting XXDP read-only. - Henk. ________________________________ Van: cctalk-bounces at classiccmp.org namens Zane H. Healy Verzonden: za 18-02-2006 03:11 Aan: cctalk at classiccmp.org Onderwerp: Re: MSCP SCSI cdrom behavior I'd not thought of building an XXDP CD-ROM, *good* idea! I assume in the case of XXDP there aren't any issues with booting off of a Read Only drive? Zane This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

18 years, 5 months

DEMSA-AA Emulator

by Useddec＠aol.com

Can you use another DEMSA? Paul

18 years, 5 months

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test-drb February 2006