test-drb June 2000

test-drb@ccmp.vtda.org

160 participants
580 discussions

by mark_k＠iname.com

Hi, Thanks for the several helpful replies on this topic. On Wed, 7 Jun 2000 Clint Wolff wrote: > I would recommend against putting the board in an oven. This will > result in the entire IC getting too hot, and possibly breaking. > Modern plastic package absorb a small amount of water from the air. > Heating the part may result in a small steam explosion. ICs are > shipped from the factory in sealed bags with some desiccant inside. > The label on the outside says to solder them down within a fairly > short time after opening (couple days IIRC). Ah, I have read about that. IC manufacturers often specify a procedure to use when chips which may have absorbed water are to be used. This involves baking at low temperature for a while. Assuming that (for the purposes of removing absorbed water) one plastic IC package is the same as the next, at which temperature and for how long should this baking be done? The lowest setting on my oven is 70 degrees C. If that is low enough -- I guess it should be as most ICs are specified for operation to 75 C or so -- I may try putting the board in there for 12 or 24 hours, before turning the temperature up to melt the solder. -- Mark

25 years

ASCII e-mail vs iso-8859-1

by rdd＠smart.net

Greetings, Can certain list members who aren't sending standard ASCII text kindly fix their e-mail software so that they stop sending messagse that could possibly cause problems for some people using older systems? Doesn't it seem a little strange that people who are interested in computer preservation are sending iso-8859-1 character set messages instead of normal ASCII to a mailing list where others are likely to be using older systems to read their e-mail? Once ASCII goes away, then we've all got problems that would make our older systems very much incompatible with everything else and less useful. Is not plain old ASCII one standard that we should value and do our best to keep >from going out of use? -- R. D. Davis rdd(a)perqlogic.com http://www.perqlogic.com/rdd 410-744-4900

25 years

Wirin' up blinkenlights

by allisonp＠world.std.com

-----Original Message----- From: Chuck McManis <cmcmanis(a)mcmanis.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Friday, June 09, 2000 11:52 PM Subject: Re: Wirin' up blinkenlights > >>For the blinkenlights, my least favorite choice is LEDs; does anyone >>have a reason for a preference of Ne2 bulbs over incandescent bulbs or >>vice versa? NE2 bulbs need 75-90v db supply to run. If your to use them use NE2H as they are brighter. >Actually in my PDP-8/x the use of white LEDs seems like it will be a win. Almost... White leds are biased toward blue white and incandesent lamps were white biased toward red. Also with incandesant the color of the lens cap was a factor. for examaple it could be red, amber, green even blue. Allison

25 years

In defense of NASA: was Re: Wirin' up blinkenlights

by allisonp＠world.std.com

>And don't overlook one Charles Goodyear. If he had not accidentally >dropped a sample of latex laced with carbon black on a hot stove, we >might still be on wooden wheels with iron treads. I thought it was sulphur. Carbon black was added for light/uv resistance. Allison

25 years

AppleTalk on the hoof

by ckaiser＠oa.ptloma.edu

Great brag today. Two ROM 03 Apple IIgses with 1MB RAM, keyboards, two sets of two each of 5.25" and 3.5" UniDisks and a nice composite monitor. But that's not the interesting part. The interesting part is the Mac SE/30 that came with them. It runs System 6 (cough) and AppleShare File Server. It looks like this was the file server for the IIgs systems, since the disk is full of AppleWorks, Oregon Trail and ProDOS boot images. :-) How do I get the IIgses to speak AppleTalk? I have the parts for building the network, and I know IIgs systems can do it (I've seen it), but obviously I need some additional software which unfortunately did NOT come with the package. This might be stretching it, but can they network boot? The IIgs Control Panel (CTRL-OPTION-RESET) yielded nothing too helpful. By the way, total cost was $0.00 ;-) (Well, I did have to buy an ADB mouse for the Mac, which was missing too. $40?! Highway robbery. But I shan't complain too much :-) -- ----------------------------- personal page: http://www.armory.com/~spectre/ -- Cameron Kaiser * Point Loma Nazarene University * ckaiser(a)ptloma.edu -- "I'd love to go out with you, but I'm rethreading my toothbrush bristles." -

25 years

IBM System/38 Availible

by mrdos＠swbell.net

There is an IBM System/38 with Tape Drive and 4 Disk Drives available in San Francisco California. If you are interested contact Rbatist(a)aol.com . If you get it, tell me all about it 'cause I REALLY wanted this one, but there isn't enough time to arrange for shipping.

25 years

Tandy 2 drive oops

by ckaiser＠oa.ptloma.edu

Roger, I think you sent me an answer about the Tandy 2 floppy drive, but in my haste I deleted it by accident. Could you resend it? I'm terribly sorry about that. -- ----------------------------- personal page: http://www.armory.com/~spectre/ -- Cameron Kaiser * Point Loma Nazarene University * ckaiser(a)ptloma.edu -- "I'd love to go out with you, but my personalities each need therapy." -----

25 years

OT Ranting (blather blather blather) Re: In defense of NASA:was Re: Wirin' up blinkenlights

by allisonp＠world.std.com

>> Somehow, probably with the help of marketing people, WD-40 could "do" >> both jobs. It does contain some very light oil. Not the best lube though, then again mousemilk isn't either and I have both for those times when... WD40, like LPS-5, 3in1, LMO (light machine oil) and various lubricants on my shelf are like the assortment of hammers I have. Some are brass dead blows, plastic, wood, claw and ballpeen all for specific uses. When used for the right purpose the right to is a great help. WD40 is like screwdrivers as they get used for hammers, prybars and whatnot all to the great consternation of the machinest sorts that know and appreciate tools. Allison

25 years

Wirin' up blinkenlights

by mcguire＠neurotica.com

On June 8, R. D. Davis wrote: > It's not only bizarre, it's apparently someone's idea of a sick joke, > that the most boring and poorly designed systems are the ones that > most people depend on these days which have replaced the VAXen, etc. A sick joke, indeed. > Is it not true, however, that all computers are toys, and that PDP's, > VAXen and Crays could have been considered toys when they were new? This is a good point. While I will slap anyone who walks into my computer room (containing about twenty machines, no PCs, well over a terabyte of disk storage, one Cray...some "classic" machines, some not) and calls anything a "toy"...I enjoy working with these systems so much that I can honestly call it "fun". As much fun as retrocomputing on the older PDP and VAX systems, as a matter of fact. So is it really that offensive to call them "toys"? Maybe not. One must not forget, however, that there *are* PDPs, VAXen, and Crays that are *not* so old. The PC marketeers would have everyone believe that anything that isn't a PC is old technology. That simply isn't the case. There are new (current technology) PDP11 systems (Mentec), there are new (albeit based on older technology) VAXen, and there are certainly new Crays. It's a stretch, but it seems that preserving "classic" computers is almost an exercise in preserving anything that's not a current Windoze box. -Dave McGuire

25 years

Fixin' der Tandy 2 floppydrivenspiegelthingengruppebochs

by ckaiser＠oa.ptloma.edu

Good news und bat news. I got a nice Tandy 200 package today, unit, power supplies, manuals and even some Club 100 disks in the original hard case. Very nice and the machine, after a little of fiddling and a cold start, is running well. That's the good news. The bad news, alas, is the 3.5" RS-232 floppy that came with it. (Yes, RS-232 floppy drive; hopefully someone has seen one of these.) It will not power up on either the power supply (original power supply, btw, which works with the M200 just fine), or new batteries. All it does is flash its low battery light briefly, spin for about a second, and shut off. I took a look at the board but couldn't see anything physically shot. Anyone have experience with these drives? What are my options? Part of getting this thing was so that I would have a floppy to save on, and maybe even get my 8201A to talk to it :-) Thanks in advance. -- ----------------------------- personal page: http://www.armory.com/~spectre/ -- Cameron Kaiser * Point Loma Nazarene University * ckaiser(a)ptloma.edu -- Arguments with furniture are rarely productive. -- Kehlog Albran -----------

25 years

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test-drb June 2000