test-drb February 2017

test-drb@ccmp.vtda.org

153 participants
189 discussions

need (physical) key for Sun SPARCserver 1000e

by other＠oryx.us

Its literally Christmas for me today. I came into physical position of a well optioned-out SPARCserver 1000e, accompanied by several SPARC Storage Arrays. I'm doing a physical review of the 1000e, i.e. re-seating boards, physical clean up, etc. And reviewing all the appropriate hardware documentation, still available, directly from Oracle. Anyway, on the front of the case is a (4) position power switch (i.e. standby, on, DIAG, lock), that is unfortunately not set to the on position. Hoping that someone out there either has a key that they will part with, or, knows of another (presumably Sun) key that will work in the 1000e key switch. Thanks for looking, Jerry @ 75077

7 years, 10 months

trying to resurrect a DG Nova 3

by suea.pac＠gmail.com

Hi CC folks: Been trying for several years now to find the vital parts I need to get a Nova 3/12 from my old Univ. up & running. What I do have now is the chassis with PS, front panel, CPU and FPU boards, some of the documentation, and, hopefully pending, a disc drive (not sure if it has controller). Most of all, of course, we badly need Mag or MOS memory, plus I/O boards/peripherals. Have posted on "vintage computers" several times and also contacted a DG specialist but so far no success with parts. ANY help in getting this thing going before, at pushing 70, I get too old to ever see it run even a simple routine or ancient game, (or care !) would be very deeply appreciated!! Please eMail: firesweep "at" verizon "dot" net if you can help or have leads! regards, Roger A. in NY

7 years, 10 months

Current Loops and TTYs (was Re: New batch of pdp8 OMNIBUS to USB interface! Please Read and react!)

by ethan.dicks＠gmail.com

On Tue, Feb 14, 2017 at 4:22 PM, Philipp Hachtmann <hachti at hachti.de> wrote: >>> PS: Add a 45.5 baud serail port. Control everything with a 5 level >>> TTY. :) >> >> Dirty casual. 20mA current loop or nothing. > > The 45 baud machines do NOT run on 20mA. They usually run on 40mA :-) The M19 is 60mA at 100VDC... takes a bit to pull that relay. > 20mA is the domain of model 28, 32, 33 etc. Yep. That's all I have in my own pile... (33 and 35). -ethan

7 years, 10 months

New batch of pdp8 OMNIBUS to USB interface! Please Read and react!

by jnc＠mercury.lcs.mit.edu

> From: Tony Duell > Personally I _do_ care about lead free solder. I won't have it. The > fact that part of this board comes pre-assembled with that horrible > muck means I won't even consider buying one. Gee, Tony, why don't you tell us what you _really_ think! :-) Noel

7 years, 10 months

Yale renames Calhoun College for Grace Hopper

by cclist＠sydex.com

Grace Hopper (if you've ever followed CODASYL or the COBOL language was a very sharp lady who's long had my admiration. Kudos to Yale! http://news.yale.edu/2017/02/11/yale-change-calhoun-college-s-name-honor-gr… --Chuck

7 years, 10 months

Changing wire-wrap configurations on DEC circuit boards

by earl＠retrobits.com

Hi there, I've got a couple of DEC QBUS boards (including a quad SLU) for which configuration is set by wire-wrap jumpers. I don't have a wire-wrap tool, and have found that trying this by hand without one is not workable. Has anyone come up with a clever way to permit reconfiguration of these boards without semi-permanent changes? Or, alternatively, what wire-wrap tool would you recommend? Thanks! - Earl

7 years, 10 months

New batch of pdp8 OMNIBUS to USB interface! Please Read and react!

by w2hx＠w2hx.com

That is a very nice and robust part you linked to. Looks perfect ________________________________ From: Ethan Dicks <ethan.dicks at gmail.com> Sent: Feb 14, 2017 10:03 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: New batch of pdp8 OMNIBUS to USB interface! Please Read and react! On Tue, Feb 14, 2017 at 8:27 AM, Alfred M. Szmidt <ams at gnu.org> wrote: > FWIW, Mini-B connectors are on their way out, nor USB OTG compliant. > Though agreed that they are flimsy... Why not just a type A or > something? Easy, big, and robust. This is a peripheral. USB OTG doesn't apply, and USB-A would be "inappropriate". Pretend this is an inkjet printer. What plug would you expect to find on that? I don't _mind_ Mini (I have a number of devices and cables that are mini) and it _is_ more robust than Micro (I have seen plenty of phones and tablets with broken micro plugs). I have a suggestion... put 4 vias on 0.1" spacing next to the micro connector so we could, for example, add a chassis-friendly exit cable of our own purchase/manufacture if we choose, to have a nice fat USB-B on the outside of the case. https://newnex.com/images/UHR1-B-0005Blarge.jpg -ethan

7 years, 10 months

Changing wire-wrap configurations on DEC circuit boards

by jnc＠mercury.lcs.mit.edu

> From: Tony Duell > I find wire wrap wire to be the best thing (soldered in place) to > repair or modify PCBs. That's what DEC used for ECO's. Noel

7 years, 10 months

AT&T 3B2 UNIX System V User Reference Manual for sale

by jbader＠neteffects.com

AT&T 3B2 Computer UNIX System V User Reference Manual Original red hardcover, 3-ring binder, 9"x9"x2" Published July 1985 Excellent condition, never used Best offer plus $10 for shipping.

7 years, 10 months

Information Request: unidentified HP 9825T instructions

by cruff＠ruffspot.net

Tony Duell wrote: > My first thought, and it's probably wrong, is that these instrucitons > (which differ by one bit, so might be > setting/reseting something) are NOPs to the CPU, but are interpretted > by the memory mapping hardware in those > 9825s that have more than 64K or RAM and ROM total. This seems likely. According to your schematics, gate U47 detects the pattern 0701xx. This signal feeds into the U43c flipflop, which appears to latch the state of the low 4 bits of the MAD bus into register U42, which sets the state of the /ForceRAM (bit 3), /ForceROM (bit 2), /DiagRd (bit 1) and ALLROM (bit 0) signals. Thus, these two instructions appear to toggle the state of the /ForceROM signal. If I?ve wrapped my brain around the details it appears that 070113 deasserts the /ForceROM signal, and 070117 asserts it?

7 years, 10 months

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test-drb February 2017