test-drb July 2000

test-drb@ccmp.vtda.org

155 participants
521 discussions

VAX-11/730 (was RE: Unresistable pond comment)

by agraham＠ccat.co.uk

Me and a colleague once brought an entire PDP 11/73 (big box variety, not the BA23 or BA213 style) down a flight of stairs; I think we removed the RL02s first, but even then it was still bloody heavy. Nutters. > -----Original Message----- > From: ard(a)p850ug1.demon.co.uk [mailto:ard@p850ug1.demon.co.uk] > Sent: 18 July 2000 20:59 > To: classiccmp(a)classiccmp.org > Subject: Re: VAX-11/730 (was RE: Unresistable pond comment) > > > [Moving the 11/730] > > > > No, but it took an entire weekend and you had quad muscles > *this big* by the > > time you'd finished :o) > > Actually, it took an afternoon to dismantle and move 2 > machines (one to > me, one to a friend). Putting them back together took a > little longer... > > Once they're taken apart, the individual parts are not that > heavy and are > no problem to carry. The empty rack frame was about the worst > part to move. > > -tony >

24 years, 5 months

Repair or Replace? [Was: Repairing Timex]

by dhquebbeman＠theestopinalgroup.com

> > ....and then replace it with a chip socket followed by working chip? > > Yes. The socket may not be 'original', but it makes future repairs > easier, and possibly prevents further damage to the PCB from > such repairs. > > Use a good quality socket. I use nothing but the turned-pin type now -- > bad connections on IC sockets are a pain to trace. The extra cost of such > a socket is cheap compared to my time tracking down a fault! Tony- By "turned pin" you mean as in turned on a machine lathe, correct? We just call these "machined" pins here... always a joy to discover alternate usages of our uncommon tongue. :-) -dq

24 years, 5 months

Repairing Timex

by sring＠uslink.net

Can anyone recommend sources regarding the troubleshooting and repair of the Timex 1000? Also wish to buy magazines, etc. for this computer. From: "Stephanie Ring" sring(a)uslink.net

24 years, 5 months

Experience with P112 CPU board?

by RCini＠congressfinancial.com

Has anyone played with the P112 Z80 SBC from D-X Designs (Dave Brooks)? It looks like a nice little Z80 setup in a 4" x 5" board. Rich ========================== Richard A. Cini, Jr. Congress Financial Corporation 1133 Avenue of the Americas 30th Floor New York, NY 10036 (212) 545-4402 (212) 840-6259 (facsimile)

24 years, 5 months

Repair or Replace? [Was: Repairing Timex]

by agraham＠ccat.co.uk

> You'll need a REALLY LONG T-15! I found a longish 1/4 inch > hex-drive Torx bit and a slender 1/4 inch hex extender. If > you're very lucky/keen, you can get a special Mac > screwdriver with is T-15 and about two feet long! I know - I'm hoping my extender is slender enough :) > If you're absolutely sure it's a dead chip, the safest way > to replace it is to snip all the legs off, one by one, and > then unsolder them. Your goal is to save the (unique) PCB > and replace the (not unique) chip. PCB foil will come > unstuck if heated for a while, especially on cheaper PCBs, > such as were used in early 1980s home computers... ....and then replace it with a chip socket followed by working chip?

24 years, 5 months

Repair or Replace? [Was: Repairing Timex]

by dhquebbeman＠theestopinalgroup.com

Paul Williams wrote: > > 3. There's a big difference between writing a program and > engineering a large software system. Right arm! I learned a few interesting techniques in college, but trial-by-fire is the only way I know of to learn how to engineer a large software system (such as the process control system I designed so long ago). It helps to be able to design one to throw away, as per Brooks. Lacking the freedom to do so, it helps to learn how to obfuscate precisely what you're working on when report to TPTB. > No doubt I should have sprinkled some smileys in the above text. :-) -dq

24 years, 5 months

Java Exidy Sorcerer Emulator

by pete＠dunnington.u-net.com

On Jul 18, 23:03, Phil Guerney wrote: > Many micro's of that time had the " as shift-2, but I wish I had a > Sorcerer to confirm The Sorcerer keyboard layout is ! " # $ % & ' ( ) * = ~ ESC 1 2 3 4 5 6 7 8 9 0 : = ^ { } LINE TAB Q W E R T Y U I O P [ ] FEED RETURN SHFT + ` | RUB GRAPH LOCK A S D F G H J K L ; @ \ _ CLEAR < > ? RUN CTRL SHIFT Z X C V B N M , . / SHIFT RPT STOP > However simple BASIC statements (that did not use "=") ran fine. Not a > bad achievement for a Java program that loads in less than a minute. Though it runs incredibly slowly, at least on my unix box. -- Pete Peter Turnbull Dept. of Computer Science University of York

24 years, 5 months

Repair or Replace? [Was: Repairing Timex]

by agraham＠ccat.co.uk

Tony wrote: > of the time you can manage with the common hand tools (screwdrivers, > pliers, etc), a good soldering iron, a DVM, a logic probe and a brain. Now there's a question - I've just got back from a little expedition to Maplins (butane gas, digital multimeter since I'm sure work's analogue one is iffy since I dropped it :), T10 and T15 torx bits etc (I WILL get into that Mac Plus)) and I could've got a logic probe too. I know they're used to test deadness etc in chips, but how do I use one? It'd be nice to trace which chip is dead in my knackered Atari 800XL and Memotech MTX500 (x2), then I'll have to teach myself how to resolder non-socketed chips! (in the case of the atari anyway) a

24 years, 5 months

...and here's another - HP9000 question

by agraham＠ccat.co.uk

> Yes, but do you know that no other components have failed (in other > words, have you fitted a new fuse and found that the machine > still works)? I was going to do that last night but discovered that the gas soldering iron I'd just bought obviously didn't come with any gas :). I think I must've bumped me head in the crash or something. My other iron's buried somewhere deep within the bowels of our babysitter's house! > It may be that the overvoltage damaged something else, and > that something > else blew the fuse. Or, let's hope you're lucky and it was > just the fuse... That's 1st on the list of 2 things to do tonight......2nd is the A1097C.... cheers!

24 years, 5 months

While we're talking about Lisas

by agraham＠ccat.co.uk

Hells - I wish I'd known about this list when I first started getting screen problems! I can certainly check all the power-off things like oxidation etc, but I think I'll leave the power-on stuff to an expert! Whereabouts are you Tony? > -----Original Message----- > From: ard(a)p850ug1.demon.co.uk [mailto:ard@p850ug1.demon.co.uk] > Sent: 17 July 2000 20:50 > To: classiccmp(a)classiccmp.org > Subject: Re: While we're talking about Lisas > > > > <snip>

24 years, 5 months

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test-drb July 2000