test-drb November 2005

test-drb@ccmp.vtda.org

255 participants
692 discussions

by vp＠cs.drexel.edu

A California bankruptcy court will sell Interex's membership database to the highest bidder to help satisfy creditor demands of the bankrupt user group, according to recently filed court papers. The Hewlett-Packard Co. user group claimed about 100,000 members before filing in August for bankruptcy. http://www.computerworld.com/governmenttopics/government/legalissues/story/… **vp

19 years, 5 months

OT: Lowest-power small server solutions( wandering farther )

by ken＠seefried.com

From: Sridhar Ayengar <ploopster at gmail.com> > Bert Thomas wrote: >> McFadden, Mike, A wrote: > > > > ... from an engineering film. >> >> What is an engineering film? > > > It's the film leftover in a bathtub after you fill it with engineers and > then drain it. Funny...I thought it was what you skimmed off when you boiled a big pot full of engineers. At least...that's what the cajuns told me... <ObJustinWilson> HooooooWeeee...I gar-un-teeee! Ken

19 years, 5 months

TRS-80 Mod 16

by Alwrcker82＠wmconnect.com

Help needed on TRS-80 Mod 16. I am getting a TRS-80 Mod 16 but no keyboard > wonder if it will work till I find one for > the Mod 16. > Thanks for any help, Al DePermentier > >

19 years, 5 months

Circuit Diagram

by ploopster＠gmail.com

Does anyone have a decent, clear and bold softcopy circuit diagram of a three-phase rectifier suitable for a poster? Peace... Sridhar

19 years, 5 months

help - 11/34 console problem

by henk.gooijen＠oce.com

> This suggests it is correctly counting the digits you enter > (or shifting them into a register), but is not displaying > them correctly. And it is only updating the bottom 8 bits. Yes, I got that feeling too. That is why I am puzzled, because the 8008 'seems' to execute its program ... sort of. > Alas DEC didn't publish a source listing (or even a binary > dump) of the console firmware in the printset. This is going > to make troubleshooting a little harder, since you … [View More]probably > don't know what it should be doing. It is clearly running a > program, and that program is reading the keyboard and > scanning the display. So it is somewhat correct. Well, in the Maintenance Manual of the KY11-LB that I have *is* the 8008 software, there is even a chapter that describes the 8008 instruction set (IIRC, I skipped that chapter). > What does it do if you press 4 repeatedly? Does it flash the > bottom 3 or bottom 2 digits? If it's only updating the bottom > 8 bits, you see, then only 2 digits will flash from 0. I will check that tonight! I remember that pressing the '7' key does not have any effect at all. No display flash, nothing. > > AFAIK, the entry of the digits, for example the numeric > > entry '165020' does *not* need the UNIBUS, but only sets up > > an internal register. The 'LAD' button, and 'DIS AD' will > > start a UNIBUS cycle (to access a memory location). Correct? > > I think so. Ok. I am working on a theory. My first step (already done) is to minimalize the system. It is now just the PSU (...) and the DD11-PK backplane. I removed the cache and FP11 option. The backplane now only holds the 2 CPU boards, and the M9312, M9302, the SLU and the KY11-LB. All other slots have in position C-D a G7273 grant-cont card. The symptoms are still the same, btw. The theory is as follows. If the KY11-LB does not do UNIBUS accesses when just the keypad is used, you could have the KY11-LB the *only* board in the backplane via an extender to make measurements to pins easy ... Going to the attick to get the printset from the big pile! Since I removed all boards, thus unplugged several flat cables, to clean the BA11K thoroughly, it might have developed a problem in the wiring. Perhaps the printset will give insight in this strange behaviour. > > BTW, the voltage on the CPU backplane (DD11-PK) is 5.08 V. and > > the +15 and -15 read +/-15.x V. (Can't remember the exact value). Come to think of it ... I did not check ACLO and DCLO. I will ahve to see if the KY11-LB uses them or not! > > I have an other 11/34 with an M7958, but never powered up that box. > > I took that M7859 and installed it in the 11/34C. The display stays > > dark. According to the M7859 doc, that basically means that > > the board is dead. So much for board swapping. Sorry, could not > resist to try an easy success. I don't have other spare M7859 ... > You may find the totally dead board easier to debug. At least > you can check for a clock at the 8008, and for activity on > the internal bus to the firmware ROM, etc. The KY11-LB manual says that this is the hardest to solve case :-) But then, that was for a field engineer ... I assume that the board was simply swapped and continue from there. I have put the 'dead' KY11-lB back in the box where it came from, but added a label to it saying "DEAD ??". For later ... :-) > -tony Thanks Tony. I will test the keypad response. Ah, I remember one more thing. Pressing the 'LSR' button does turn on the 'SR DISP' LED. One more thing that makes it like it is working, almost ... thanks, I will post updates! - Henk, PA8PDP 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. [View Less]

19 years, 5 months

HP 9133 (Matthews, Phil)

by wayne.smith＠charter.net

> Date: Tue, 18 Oct 2005 08:36:11 -0400 > From: "Matthews, Phil" <Phil_Matthews at DRSOptronics.com> > Subject: HP 9133 > To: <cctalk at classiccmp.org> > Message-ID: > <53CB7766CBAB9148BCB56ABC56F408CF051921D4 at california.drso.biz> > Content-Type: text/plain; charset="us-ascii" > > Hi, > > I have been looking at your cctalk bulletin board and it > appears that Frank McConnell is someone who knows a lot about > old HP computers. I … [View More]

19 years, 5 months

FPGA VAX update

by ajp166＠bellatlantic.net

> >Subject: Re: FPGA VAX update > From: "Chuck Guzis" <cclist at sydex.com> > Date: Wed, 02 Nov 2005 16:13:45 -0800 > To: cctalk at classiccmp.org > >On 11/2/2005 at 6:31 PM Allison wrote: > >>Valves are harder due to power, heat and most importantly size. A few >>hundred >>miniature duo-triodes will fill several racks. > >I used to buy old mil-surplus boards that each contained six wired-in >subminiature (Raytheon CK something or … [View More]

19 years, 5 months

FPGA VAX update

by dwight＠ca2h0430.amd.com

>From: "Allison" <ajp166 at bellatlantic.net> ---snip--- >>Depending on how much 'from scratch' people feel is necessary, it's also interesting to roll your own computer using an off-the-shelf processor (or multiples). I have a simple 8088-based SBC design wired up and waiting for motivation to put together some test firmware. The main thing that has kept me >from bringing it up is the difficulty in getting x86-based machine language development tools going. I'm used … [View More]

19 years, 5 months

FPGA VAX update

by ajp166＠bellatlantic.net

> >Subject: Re: FPGA VAX update > From: spc at conman.org > Date: Wed, 02 Nov 2005 18:32:47 -0500 (EST) > To: cctalk at classiccmp.org > >It was rumored that The Great Scott Stevens once said: >> >> Depending on how much 'from scratch' people feel is necessary, it's also >> interesting to roll your own computer using an off-the-shelf processor (or >> multiples). I have a simple 8088-based SBC design wired up and waiting >> for … [View More]

19 years, 5 months

OT: Lowest-power small server solutions

by ajp166＠bellatlantic.net

> >Subject: Re: OT: Lowest-power small server solutions > From: Scott Stevens <chenmel at earthlink.net> > Date: Wed, 02 Nov 2005 18:01:50 -0500 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >On Wed, 02 Nov 2005 12:10:56 -0500 >Allison <ajp166 at bellatlantic.net> wrote: > >> > >> >Subject: Re: OT: Lowest-power small server solutions >> > From: "Chuck Guzis" <cclist at … [View More]

19 years, 5 months

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test-drb November 2005