test-drb

test-drb@ccmp.vtda.org

101090 discussions

Looking for HP/Agilent E2760D cooling system manuals/guides

by lordofhyphens＠gmail.com

Anyone have any scans or is willing to drop them in the post for a university? Full story: Back in 2005-2007, Qualcomm gave our ECE department a used Agilent 83k tester (F330t). It's basically sat in pieces because there's been no money to hook it up. Well, now there is some money floating around to make this happen, and I'm the poor GA stuck with trying to dig up I have the service manuals and site prep guides for the mainframe itself, but HP/Agilent (in its infinite wisdom) broke out the cooling unit requirements (as in whether or not we need chilled water or even the gpm) into its own manual! We have the E2760D L/L (liquid/liquid) unit. It looks like the manual # is E2760-91001. Any other related manuals would also be helpful. "Nothing unreal exists." - Kiri-kin-tha's First Law of Metaphysics.

11 years, 5 months

Jim Drew's SuperCard Pro?

by jason＠textfiles.com

I like Jim Drew and I own one, but I can't vouch for its operation. On Thu, Feb 19, 2015 at 8:27 AM, John Foust <jfoust at threedee.com> wrote: > > I asked about the "DiskVaccuum" two days ago and got no response. > That project caused a handful of messages here a year ago, but no more. > > Any opinions on Jim Drew's SuperCard Pro disk-reading device? > > It was recommended to me by Cloanto, the Amiga emulator place, > for archiving my Amiga floppies. > > $99, USB on a PC, seemingly nice manual. I'd like it to handle 8" inch > drives, too, but it looks like I'll need to ask about that, as they > didn't say more than "it should work." > > http://www.cbmstuff.com/proddetail.php?prod=SCP > > - John > >

11 years, 5 months

Pascal not considered harmful - was Re: Rich kids are into COBOL

by john＠yoyodyne-propulsion.net

-----Original Message----- From: "John Foust" <jfoust at threedee.com> Sent: ?19/?02/?2015 16:28 To: "cctalk at classiccmp.org" <cctalk at classiccmp.org> Subject: Re: Pascal not considered harmful - was Re: Rich kids are into COBOL At 05:05 PM 2/18/2015, Ethan Dicks wrote: >I snark about Pascal all the time. I encountered it in a professional >capacity in 1987. [...] >Utterly trivial in languages that trust the programmer to handle >unformatted I/O. All true, but doesn't it make you wonder why Turbo Pascal was such a popular development environment for the PC for so long? Was it the sheer will power and marketing of Borland, or was it the volume of developers who didn't need intensive low-level I/O? By '85, there were several C compilers for the PC and I even remember using Gimpel C-terp, a C interpreter that made development and debugging easier. - John

11 years, 5 months

Jim Drew's SuperCard Pro?

by jfoust＠threedee.com

I asked about the "DiskVaccuum" two days ago and got no response. That project caused a handful of messages here a year ago, but no more. Any opinions on Jim Drew's SuperCard Pro disk-reading device? It was recommended to me by Cloanto, the Amiga emulator place, for archiving my Amiga floppies. $99, USB on a PC, seemingly nice manual. I'd like it to handle 8" inch drives, too, but it looks like I'll need to ask about that, as they didn't say more than "it should work." http://www.cbmstuff.com/proddetail.php?prod=SCP - John

11 years, 5 months

Pascal not considered harmful - was Re: Rich kids are into COBOL

by jfoust＠threedee.com

At 05:05 PM 2/18/2015, Ethan Dicks wrote: >I snark about Pascal all the time. I encountered it in a professional >capacity in 1987. [...] >Utterly trivial in languages that trust the programmer to handle >unformatted I/O. All true, but doesn't it make you wonder why Turbo Pascal was such a popular development environment for the PC for so long? Was it the sheer will power and marketing of Borland, or was it the volume of developers who didn't need intensive low-level I/O? By '85, there were several C compilers for the PC and I even remember using Gimpel C-terp, a C interpreter that made development and debugging easier. - John

11 years, 5 months

Replacement for Google's broken Usenet group search

by aek＠bitsavers.org

They seem to have broken it sufficiently now that nothing is returned after the end of October. Is there anyone indexing Usenet that has a clue? It seems like all that is left is for-pay services for searching alt.binaries.

11 years, 5 months

Equipment Available (claimed)

by jwest＠classiccmp.org

The PDP-11/03 with expansion chassis and RX01 in Sydney Australia has been claimed. J

11 years, 5 months

cost of low-quantity PCBs with hard gold over nickel edge card connectors

by spacewar＠gmail.com

I'm seeking input from the various people that have in recent times made PCBs to plug into old microcomputers and minicomputers using PCB edge card connectors. There are quite a few companies (and coops) that offer very inexpensive PCB fab service, even in low volumes, particular for double-sided PCBs (vs. multilayer). However, I haven't found a PCB fab house that offers any reasonable deal on low volume runs of PCBs with plating of hard-gold over nickel edge connectors. Has anyone found a vendor that does? I was somewhat surprised at the difficulty in tracking down good information on best practices for PCB edge fingers. Several of the PCB companies suggested just using an ENIG (electroless nickel immersion gold) on the whole PCB, including the edge card connector, but that isn't really suitable. According to an excerpt of a draft of the IPC-4522 standard, ENIG gold is typically only 0.025 to 0.05 microns, and is not suitable for edge finger use for more than five insert/remove cycles. (It would be perfectly acceptable to have ENIG, HASL, or tin finish on the rest of the board.) A document from AMP recommends 0.4, 0.8, or 1.3 microns of hard gold over nickel, to withstand 200, 1000, and 2000 cycles before failure, respectively. The IPC-2221 standard suggests three categories: Class 1: 0.8 micron gold over 2.0 micron nickel, for general electronic products Class 2: 0.8 micron gold over 2.5 micron nickel, for dedicated service electronic products Class 3: 1.3 micron gold over 2.5 micron nickel, for high-reliability electronic products. The PCIe specs require 0.7 micron gold over 1.2 micron nickel. I'm perfectly willing to build prototypes for my own personal use using ENIG or even HASL with nothing special for the edge fingers, and be resigned to them not withstanding many cycles. However, if I were to offer a product for sale to other hobbyists, I don't think that would be acceptable. I suspect that the original PCI specs had a similar requirement to PCIe. I estimate that a 32-bit PCI edge card requires about 1300 mm^2 of gold over nickel (counting both sides of the PCB), which works out to a little less than 1 mm^3 overall, which at recent gold pricing would be about USD $0.80 in gold. An Apple II card would probably have a roughly similar amount of gold, while S-100, Qbus, Omnibus, Multibus, etc. cards would require several times that. I'd be delighted if in small volume I could pay less than an additional $25 each to get the hard gold over nickel edge connector, but so far I haven't found a PCB fab comes even close to that. Eric

11 years, 5 months

P112 kit still available

by dave＠661.org

In case anyone is wondering, I still have a P112 kit for sale. $197 shipped in the US. -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

11 years, 5 months

Rich kids are into COBOL

by shawn-gordon＠cox.net

I love this loop construct. I was just talking to a friend the other day about how nice the GO language is, but I lamented that no one has ever copied the elegance of the single loop verb in COBOL. On 2/18/2015 8:50 AM, Chuck Guzis wrote: > Is there any other language (save PL/I for obvious reasons) that has > an equivalent to the COBOL PERFORM...THRU statement? > > That one always struck me as being a bit offbeat. Example: Consider a > section of a program with 4 consecutive paragraphs, named PARA-1 > through PARA-4. One can say in the same program: > > PERFORM PARA-1 23 TIMES. > PERFORM PARA-1 THRU PARA-4. > PERFORM PARA-1 THRU PARA-2. > PERFORM PARA-2 THRU PARA-3 WITH TEST AFTER VARYING INDEX-1 FROM 10 BY > 3 UNTIL FLAG-1 > 0. > > It's that variable scope of a PERFORM that I don't recall seeing in > any other language. > > --CHuck > > > >

11 years, 5 months

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb