test-drb September 2004

test-drb@ccmp.vtda.org

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"Vintage" tech article

by news＠computercollector.com

http://www.nytimes.com/2004/09/09/technology/circuits/09retr.html You have to register, but it's free. - Evan K.

20 years, 3 months

LGP-21 Friden Flexowriter...

by tomj＠wps.com

In a bold and foolish move this morning, I simply plugged in the frayed off-line power cord into the Flexo and outlet, and flipped the switch. Motor spun, no work. Tilted down the keyboard lookup table (sic) on the bottom, rotated the mainshaft by hand, it loosened. After that, the thing ran! Lubrication is dead, which was obvious before I started. I know I shouldn't have done this, but total run time << 60 seconds, it was a 'success experience' and overall good news. It was nice to have a physical experience after all this time of hypotheticals and document-gathering.

20 years, 3 months

Commodore PET disk drive power-up error codes

by dave04a＠dunfield.com

Hi Guys, Does anyone have information on error-codes that are flashed by PET disk drives after power-up diagnostics fail. I have a drive set which after powerup, enters into a state where it flashes the POWER LED alternating with both drive LEDs (together) - It repeats this flash cycle exactly 6 times, then pauses, then another 6 ... forever. I assume it's a diagnostic failure - Can anyone tell me what it means? Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector. http://www.parse.com/~ddunfield/museum/index.html

20 years, 3 months

version of MSDOS 6.22 expand.exe for Linux?

by pete＠dunnington.u-net.com

On Sep 10 2004, 12:39, Jules Richardson wrote: > Does anyone know if there's a decompression util for Linux that can > handle MSDOS 6.22 compressed files? [ ... ] > Unfortunately I'm surrounded by Linux machines right now and nothing > with a hard disk onto which I can install DOS - and I don't think I can > boot DOS 6.22 from floppies and tell expand to decompress a file into > memory, let me change floppies to the one I want the expanded version > on, and then write it out... :-) I know you've got it sorted now, but if it ever happens again, remember that on a single-floppy machine, DOS will prompt you to change the disk in the floppy drive if you refer to it as B: instead of A: (and then prompt you to change back when appropriate). -- Pete Peter Turnbull Network Manager University of York

20 years, 3 months

Intellec power cord

by jack.rubin＠ameritech.net

> Looking for help on an Intellec 4. I need to get a power > cord. Does anyone know of a source for cords for the classic > computers? Does the Intellec 4 and other Intellec models > share the same power cords? > > Thanks, > > Jeff > Take a look at Newark Electronics - 17280-B1-8 or 17952-B1-8 - under power supply cords. Jack

20 years, 3 months

Bitsavers archive mirror

by msokolov＠ivan.Harhan.ORG

Wai-Sun Chia <waisun.chia(a)hp.com> wrote: > p.s. Just curious how many of you still uses good-ole classic analog > modem technology daily? My main computing centre is connected to the outside world by one. Logically it's a very dedicated connection (I have a real full Class C NET routed down my pipe), but physically it's an analog dialup modem. MS

20 years, 3 months

Completely and totally off-topic and without any meritwhatsoever

by pete＠dunnington.u-net.com

On Sep 7 2004, 21:28, William Donzelli wrote: > > I suspect the hazmat team over reacted just a little. > > This is often the case - the hazmat guys I have talked to have been pretty > reasonable, but due to public pressure, they often have to put on a show. > > > Mercury in elemental form is not all that dangerous ( or > > most of us old timers would be dead or vegetables by now ). > > It is most dangerous as salts or as long term exposure > > to vapor. > > Finally someone speaks the truth! Elemental mercury mostly passes thru the > body in one big blob, and very little is absorbed. I think it is rarely > used as an antibiotic, as well. > > The compounds are the nasty things, as they due damage pretty > quickly. Also, mercury vapor is also very dangerous *even in short > periods of exposure*! The poor guys in South America that purify gold thru > amalgamation (and the subsequent vaporizing to get the mercury back) tend > to have very short lives if they are not careful. That's because of *chronic* exposure. The risk from a single small dose is not very high (though obviously it depends on the dose); your body will excrete most of the mercury (but not very fast, and over the last couple of decades, what's regarded as a "safe" level has been reduced quite a lot). The problems come when repeated exposure causes ingestion or absorbtion faster than you can excrete it. That's why spilt mercury is dangerous. It gets into small spaces, and takes a very long time (years) to vapourise (the vapour pressure is very low but so is the toxic level). Various mercury compounds have been used medically (eg mercuric chloride and mercuric iodide were used as antiseptics and fungicides). -- Pete Peter Turnbull Network Manager University of York

20 years, 3 months

Anyone know how to set Aux port speed on Datamedia DT/80

by dave04a＠dunfield.com

Hi Guys, Just acquired a Datamedia DT/80 (nostalgic value - spent many 100s of hours in front of one of these during earlier parts of my career). Don't have docs, however it's a pretty accurate VT-100 clone, and almost everything from the VT-100 manual is exactly right. However, it has an AUX port which the VT-100 doesn't ... I can set set TX and RX speed with SETUP-B '7' and '8', however ASPD shows at 50 and I can't find anything to budge it... Anyone know how to set the Aux port speed on a DT/80 ? Are there any settings for Aux port data bits, parity, flow-control etc.? Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector. http://www.parse.com/~ddunfield/museum/index.html

20 years, 3 months

test, please ignore

by news＠computercollector.com

test, please ignore

20 years, 3 months

Tony simulator

by javickers＠solutionengineers.com

At 01:08 11/09/2004, you wrote: >-----Original Message----- >From: Tony Duell <ard(a)p850ug1.demon.co.uk> > >'Do you have a scheamtic for a <foo>' ----------- >what's a "scheamtic"? I know what "foo" is... A "scheamtic" is just like a "schematic", with the addition of a small mirror in the middle. HTH! Cheers, Ade.

20 years, 3 months

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test-drb September 2004