test-drb January 2006

test-drb@ccmp.vtda.org

240 participants
511 discussions

by ddl-cctech＠danlan.com

with desk side cabinet, cpu, one memory board, SCSI, and QIC tape drive (the nicer 24/11 one I think). Located in Gloucester, MA, USA. Shipping is almost certainly prohibitive. Dan Lanciani ddl at danlan.*com

18 years, 8 months

basic language startrek program

by henk.gooijen＠oce.com

check out http://www.dunnington.u-net.com/public/startrek/ and ask Pete. He might be interested :-) BTW, can you tell more about the mainframe (type, manufacturer, where, etc.)? - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens BOB LAAG Verzonden: vr 06-01-2006 21:41 Aan: CCTECH Onderwerp: basic language startrek program Looking for info or the origin of a paper tape program in basic that plays a startrek game with quadrants, stars, klingons, etc... I got it back in the 70's from some military guys and it ran on my old computer mainframe stuff... Just wondering if anyone recognizes this or wants the file??? 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, 8 months

cleaning keyboards in the dishwasher

by James＠jdfogg.com

---- There are only 10 types of people in the world, those who understand binary and those who don't. > -----Original Message----- > From: cctech-bounces at classiccmp.org > [mailto:cctech-bounces at classiccmp.org] On Behalf Of woodelf > Sent: Friday, January 06, 2006 2:00 PM > To: On-Topic and Off-Topic Posts > Subject: Re: cleaning keyboards in the dishwasher > > James Fogg wrote: > > > > >City water has some chlorine and has a tiny risk of bleaching, > > > >All automatic dishwasher detergents have lots of chlorine and might > >bleach (great for discolored plastics), > > > > > > > I read some where that chlorine kills electrolitic caps DEAD > if it ever gets inside. *anything* getting into an electrolitic would kill it, or at least change its specifications in an unwelcomed way. I wouldn't expect there to be any more risk than with water. But there are other issues with corrosion, so chlorine is a bad thing.

18 years, 8 months

by henk.gooijen＠oce.com

There was a fair discussion just a few months ago about this topic. If you'd ask me, remember that the old PDP-11 clock signals are below 20 MHz, so you don't need a 1 GHz sampling 'scope :-) But a decent 50-60 MHz dual-trace is not bad. For these tools, they work best if the "man using the tool" knows what he (she, if it's Allison) is doing, and knows the *limitations*, and interprets the signals or data (try to understand what (s)he sees). For logic analyzers, check out for example eBay, but make sure that it is complete with the correct wires and pods! Don't go for a LA without the pods. Useless. And buying the pods later, which is sometimes possible, is costly in the end. Just my thoughts, no intention to start a thread on this topic. Perhaps something for the ClassicComp Knowledge Base? ( http://www.classiccmp.org/kb/ <http://www.classiccmp.org/kb/> ) - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Richard Verzonden: vr 06-01-2006 21:53 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Recommended logic analyzer/scope tools? (was: RL02 write faults,fixed it! Another cable mistake) In article <447524F844B59D48B8F7AE7F560935EE02CE2288 at OVL-EXBE01.ocevenlo.oce.net>, "Gooijen, Henk" <henk.gooijen at oce.com> writes: > Yes, working your way through the schematics, actually measuring the > signals, makes you "learn" how something works - in detail! > I know a little more about the M7859 11/34 console than I did, say > 2 months ago ... So what would y'all recommend for logic analyzer/oscilloscope type tools that are useful for vintage computing (i.e. their max bandwidth/speed can be slower than needed for current tech) that are also affordable? I know Tektronix and HP are major manufacturers in this area, but I would know what to get. *Lots* of these items go up for auction via government liquidation at the local Hill AFB, so if I know what I'm looking for I should be able to eventually get something by low-bidding. Suggestions? -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/ <http://www.xmission.com/~legalize/book/> > Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org <http://pilgrimage.scene.org> > 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, 8 months

basic language startrek program

by henk.gooijen＠oce.com

That version (quadrant map in ASCII) was very common in all the old versions. I must even have such a versin that runs on a 6800, but I can not remember if it was written in native 6800 or BASIC, running on SWTPC 6800 BASIC. - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Richard Verzonden: vr 06-01-2006 21:47 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: basic language startrek program In article <43BED60D.3010607 at PACBELL.NET>, BOB LAAG <RLAAG at pacbell.net> writes: > Looking for info or the origin of a paper tape program in basic that > plays a startrek game with quadrants, stars, klingons, etc... I got it > back in the 70's from some military guys and it ran on my old computer > mainframe stuff... Just wondering if anyone recognizes this or wants > the file??? This sounds very much like the star trek game that was on the HP3000 I used at the University of Delaware circa 1978/1979. Did it print out your quadrant map with a little ASCII graphic? -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/ <http://www.xmission.com/~legalize/book/> > Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org <http://pilgrimage.scene.org> > 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, 8 months

basic language startrek program

by RLAAG＠PACBELL.NET

Looking for info or the origin of a paper tape program in basic that plays a startrek game with quadrants, stars, klingons, etc... I got it back in the 70's from some military guys and it ran on my old computer mainframe stuff... Just wondering if anyone recognizes this or wants the file???

18 years, 8 months

Homebuilt TTL and transistor CPUs

by jcwren＠jcwren.com

This fellow has some interesting projects. A 6502 opcode compatible CPU implemented in latches and EEPROMs. A NAND-gate based MC14500B. And a CPU using (mostly) only transistors. Also a introduction to microprogramming article, and some other good stuff. <URL: http://people.freenet.de/dieter.02/index.htm > I don't know if anyone else mentioned this page in the past. I don't recall it, and I tend to follow the homebuilt CPU threads here. If you've seen it already, sorry about that. --jc

18 years, 8 months

What do I call my PDP-11?

by charlesmorris＠direcway.com

What is the proper name for my PDP11 system about which you have read so much lately? (It's in a PDP11-03/L chassis, H9276 backplane, KDF11-BA CPU). Should I refer to my system (shorthand) as an "LSI-11", an "11-03", or something else (besides "that pile of junk parts :) ? thanks Charles

18 years, 8 months

RL02 write faults, fixed it! Another cable mistake

by charlesmorris＠direcway.com

On Fri, 06 Jan 2006 09:10:37 -0600 (CST), you wrote: Re: my earlier finding, I think I was mistaken. The small glitches arise because the slow risetime of the RC delay (6K8, .0056 uf) is driving a 7404 that does not have a Schmitt trigger input. Guess DEC figured it didn't matter since the first one would set the write error latch anyway. Playing with terminating resistors made little difference so I removed them. Now it turns out that the write data is indeed not getting through to the R/W board (at least today, I'm sure it was yesterday). Sure enough E65 pin 4 (the output of the write data line receiver) was not moving even though pins 1/2 (the differential data inputs) were showing data, and pin 5 (enable) was going high for 5-6 uS until the error latch set so there should have been that short a burst of transitions on the WRITE DATA PLS L line. A DVM showed a short to ground, or nearly so, on that line. I started disconnecting things and the short went away, but then returned. With the ribbon cable from the controller disconnected at the logic board the short did not recur despite moving all the connectors and flexing the board. You may already have guessed it - "operator error" cable problems again, %^&* it :P The problem (as I discovered previously on the RL8E controller, and should have remembered) with using IDC header connectors instead of the Bergs is that the bare ends were protruding ever so slightly beyond the connector body. And although I cut it flush with a fine pair of cutters, there was just enough to (sometimes) touch a via right under the header that had a little extra solder plating "bump"... one strip of Scotch "33" heavy electrical tape later and no more write faults. The XXDP pack continues to pass all read tests but I don't want to take a chance writing to it. The other pack did initialize, 20,000+ free blocks. After about 25 minutes of exercising a soft read error occurred, then another (1 word of a sector) at 31 minutes. I've just written the "worst case data pattern" test from ZRLMB1 diagnostic and there were one or two soft errors and an "XFER" error. Probably the next move is to make a "Field Bad Sector File" for that pack. Anyway - let this be a warning to those of you who want to make your own cables for RL drives. It looks easy since they are 40 pin headers inside the drive and from the back of the controller - but 1) the pattern is reversed and 2) be very careful to keep the bare cable end slightly recessed into the connector body. However, I now know much more about RL drives than I care to, and can fix the logic if it ever really does fail :) -Charles

18 years, 8 months

cleaning keyboards in the dishwasher

by dwight.elvey＠amd.com

>From: "Richard" <legalize at xmission.com> > >Have any of you really done this? > >Did you take the enclosure off? > Hi This truly depends on the type of keyboard. The one I'm typing on right now would be destroyed by doing such without complete disassembly. Dwight

18 years, 8 months

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test-drb January 2006