test-drb February 2009

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MICRAL documents

by aek＠bitsavers.org

Some people asked about it on comp.os.cpm, so there are a few MICRAL documents up on http://bitsavers.org/pdf/r2e now.

15 years, 10 months

Data General Dasher D200 Terminal on eBay

by eric940＠gmail.com

I recall (some time ago) that a few folks mentioned they were on the lookout for these terminals: http://tinyurl.com/dasher-ebay ebay item #: 200270569660 Always have admired the aesthetics of this terminal, albeit a bit pricey from this seller. (Then again, many items from this seller are pricey.) Disclaimer: I'm not affiliated w/this auction in any manner -- purely an FYI post for those who had expressed interest.

15 years, 10 months

Powering up a 20-year old MicroVAX II

by robert.jarratt＠ntlworld.com

I have just collected a MicroVAX II which has been in storage and has not been powered on for 20 years. This is my first machine of such an age, unfortunately I am not particularly knowledgeable at the electronics level (I studied circuits academically 25+ years ago and can solder a bit, but that is as far as it goes). I know I will need to treat it carefully in order to get it working again. I plan to open it up and make sure I clear out any debris etc, but beyond that I need advice from those with the experience and knowledge that I lack on how to go about powering it up carefully. Thanks Rob

15 years, 10 months

FS: AUI/Thinnet Xceivers, 10bT Xceiver, Plextor 4Plex HH SCSI drive

by jtp＠chinalake.com

More items from cleaning out the lab, nothing free this time (need cash for restoration): All used, minor wear on one LTX-2 and the Hong, others are excellent. (2) Lantronix LTX-2 ThinNet tranceivers, (RCV, HBE switches), T included, Term if you need one, $3 each + shipping in a padded envelope. (1) Hong Technologies 10baseT tranceiver. Slightly larger than normal, Handy leds: Jabber, Link, Polarity, Transmit, Receive, collision, Power. $3 + shipping (1) Plextor SE SCSI, HH CD-ROM, Sept 1995. This is a caddy unit and I will include one caddy, if I can find more I'll add them in. Term and Polarity jumpers, sound out also. Let me know if you want a ribbon cable and term with it, $8 + shipping. Unit is about 2.5 lbs (-) There is also a DEC SCSI Y Cable "BN21V-0B" on ebay Photos avail. Ship from 02421, Boston area, MA Cheers, -j

15 years, 10 months

Our hobby on MSNBC.com

by evan＠snarc.net

http://www.msnbc.msn.com/id/29264722/ MSNBC today posted a slide show about vintage portables. Myself and CHM curator Chris Garcia are quoted. Also, pictures were supplied by myself, Bill Degnan, and Erik Klein. The slide show is pretty much accurate. It's "the truth" but not necessarily "the whole truth" because of a few other products and technical nuances. Anyway, speaking for myself / MARCH / InfoAge Science Center, we're happy to have the mainstream press.

15 years, 10 months

Data Translation DT2803

by teoz＠neo.rr.com

I have a Data Translation DT2803 card I am looking for software for, I think it is 1986 vintage (8 bit ISA) frame grabber and can't find anything on it at the Data translation website (the oldest stuff they have seems to be 16 bit ISA). Anybody have a mirror of their old files?

15 years, 10 months

Randy Cook, TRSDOS, and Datapoint

by frustum＠pacbell.net

It is fairly well known that Randy Cook developed TRSDOS 1.*, 2.1. and 2.2 until he and Tandy had a falling out over the rights to the code. Randy even placed an easter egg that caused his name to be printed out in a copyright message. For TRSDOS 2.2 tandy found the code and patched "RANDY COOK" to read "TANDY CORP" (a three byte difference). Randy developed VTOS, and according to Tim Mann, LDOS was developed by disassembling VTOS 4.0, fixing bugs, and building on top of that. LDOS was eventually licensed by Tandy to be TRSDOS 6.0. OK, the new piece, which I didn't know, was that Randy Cook was an employee of Datapoint when he got the contract to write TRSDOS. He left Datapoint do to consulting work, and everyone assumed he meant on datapoint business. Apparently Datapoint claimed that Randy took DP's code and or "technology" and used that as the basis of TRSDOS. There was a either a lawsuit or a threat of one, but my contact says he wasn't privy to that and so it is hearsay coming from him. I am not familiar with the DP OS (was it really just the Databus language, or was there an OS layer akin to TRSDOS?) Can anybody here compare the two and find threads of similarity?

15 years, 10 months

Available: Victor manuals - southern California

by tosteve＠yahoo.com

Hello, I have two boxes of Victor software manuals only, no software: They include: Pascal MultiPlan BASIC Cobol Word Prefect and more. See attached photos. Sorry, some manuals not visible in photos. I live in Orange County, southern California. Who will make an offer on these? $0.00 is acceptable, but you may be outbid.

15 years, 10 months

EPROM erase times and lifespan

by ian_primus＠yahoo.com

Working with EPROMs, one must have an eraser. I built my own a while back, using a germicidal UV lamp tube, a flourescent fixture, a sealed box and a programmable timer. It works well, and I typically can erase an batch of eproms in like three minutes. At least, when I was working primarily with 2732's and 2764's, I could. Now, I've been needing to use higher capacity chips - and these seem to take longer to erase. Five minutes isn't enough for some. AMD 27C010's seem to take closer to ten minutes to erase. My eraser has a drawer that can accept about a foot of eproms (I used a 12" tube). I could probably cram more on there, but I try to keep them centered under the light. So, if I stick a dozen chips on there, of varying sized and types, and 'nuke' them for five minutes, I'll go and blank-check them, and some will be blank, others will be nearly blank (lots of FF's, but some garbage left), and some don't seem affected at all. I've been trying to come up with a correlation between manufacturer and erase time, but it seems to vary. Last time, I nuked four AMD 27C010's that I pulled off of an old LaserJet font cartridge. Three were unaffected and the other was blanked. I worry about leaving the chips in there too long, since I know too much UV can damage them. But at the same time, I wonder about the lifespan of the UV tube - and how many hours it's good for. (I guess I should have checked the package when I bought it...). So, how much UV exposure does it take to damage an EPROM? Is UV exposure cumulative? For example, if I have a chip that's unaffected by five minutes, and I put it back in for another three - is that the same as as running it for 8 minutes total, or do the charges that the UV is supposed to dissapate simply linger? Are CMOS chips harder to erase, taking a longer time than the older parts? -Ian

15 years, 10 months

[Claimed] HP 1000 F for trade?

by rborsuk＠colourfull.com

Thank you all who have responded. The HP system has been claimed. Rob (always looking for a trade) Borsuk Begin forwarded message: > Subject: HP 1000 F for trade? > > All this talk about HP 1000 F reminded me that I have one of these > beast that I need to get rid of. > Anybody got anything good to trade? (Wang equipment would take > precedence)(TRS-80 and CP/M machines are cool). > > Pics at: > http://gallery.me.com/irisworld#100093 > > Rob > > ps. USA only please. > Rob Borsuk email: rborsuk at colourfull.com Colourfull Creations Web: http://www.colourfull.com

15 years, 10 months

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test-drb February 2009