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101090 discussions

by allisonp＠world.std.com

<Allison, < Do you remember a worm that some sysadmin (North, South Carolina or <someplace like <that?) turned loose on his systems, back around 89-90, and _forgot_ to <isolate his network from the general DECnet? I sure do.. Spent most of a Yes... I had to put securepak on VIDSYS:: and it was the first time the vax crashed seems there rev levels were a bit off. The machine was never quite as stable after that until I reinstalled when 5.3-2 came out. The istability was an inherited problem from the former sysop and system owner. I still have VIDSYS:: and it's still running 5.4-4 and securepak though I've trimed as much as I dare off. Allison

27 years, 7 months

[OT] Space shuttle explosions and computers (was Re: Who invented the internet?)

by allisonp＠world.std.com

First off it's ok, I'm ok! <Allison wrote: <> FYI the speed attained at <> that point is some 3600mph far from orbital velocity. < <I'm not sure how to parse that. Are you saying that it was traveling at <3600 MPH, which is far from orbital velocity (i.e., a missing comma), or <that it was travelling at 3600 MPH less than orbital velocity? Sorry bout that. I do tend to be a tad graphlexic the comma should have been there. It was velocity of 3600. they need 17500+ to orbit. <(In any case, the use of the word velocity is incorrect. Velocity is <a vector, as I had drilled into me in Physics class.) Their forward speed, velocity. I'm a pilot and am quite used to having vectors influence the direction and speed that is indicated vs ground track. <The NASA reference I posted earlier claims: < At this point in its trajectory, while traveling at a Mach number < of 1.92 at an altitude of 46,000 feet, the Challenger was totally < enveloped in the explosive burn. Downrange groundtrack speed is far lower as the vector is still mostly vertical (still greater than 60degrees) at that part of the mission. If memory serves the debrie field was a rough footprint of 20 wide by 80 miles long (for the greater part of the material). As to what computer... Not sure myself totally. It's my belief that the IBMs are high level systems management computers and they command the engine computers. The engines have their own local computers to handle their realtime needs. Same applies to several other systems. I consider spacecraft/aviation computers to be both classic and of great interest. Most are very system and mission specific thus may be nothing more than sequential controllers. Still, I'm curious. Allison

27 years, 7 months

What the hell is this!!! was Re: I need a ST-419 hard drive

by musicman38＠mindspring.com

--- I opened up the 419 drive, No wonder it failed, someone drilled a 5/16" >hole thru the cover and all three platters! This thing was mounted under a >circuit board and inside a steel case. Everything was very neatly put back >together. Who would go to that much trouble to wreck a drive and why? > > Joe Gads! I've heard of reformatting old drives for security reasones, but this one takes the Cake... Quick and easy way to eliminate a data getting in the wrong hands I guess..

27 years, 7 months

Old CDC/Magnetic Peripheral Drive on DPS6

by enigma＠sevensages.org

I have this weird drive on an old mini (Honeywell DPS6). These things have an internal fixed disk, plus, you have to put in a disk pack in them also. Well, on one of my drives, the belt that runs between the drive spindle and the motor broke. Where can I find a replacement? Manufacturer: Magnetic Peripheral Equip ID# BJ7D3-A Part # 77708003 Series Code 01 Another thing, I think the drive might be refurbished or something. On the serial number on one of them, atleast (the working drive) it has a hand-written "R" after the number. Anybody who can help me, please do. In fact, if you can help me with anything about the DPS6 or with GCOS6, I will be forever thankful. From what I've heard, GCOS6 is sort of a GCOS/Unix hybrid. Should be interesting. Also, if by chance, you know of an old Unix variant that would run on this baby, that could be nice too. I think having an old 7th edition Unix system would be nice. However, I think having GCOS6 would be really nice, too. Regards, J.S. Havard Head Geek The Seven Sages Project Regards, J.S. Havard - ----=(enigma(a)intop.net)=---------------------------------------------- This message was sponsored in part by John Havard. Copywrong (c) 1998 by John Havard under the terms and conditions of no sort of public license. All prices subject to change. Void where prohibited. Tax, title, and license fees not included. All rights reserved. ------------------------=(www.intop.net/~enigma/)=--------------------

27 years, 7 months

What the hell is this!!! was Re: I need a ST-419 hard drive

by mbg＠world.std.com

I doubt it was security concerns, since there are companies which can recover data from all the parts of the platters which weren't drilled. Either that, or the security person who ordered it really doesn't know what they're doing... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 7 months

I need a ST-419 hard drive

by rigdonj＠intellistar.net

I need a Seagate ST-419 to replace one that failed in a HP computer. Anyone got one to spare? Joe

27 years, 7 months

Sanyo 550

by musicman38＠mindspring.com

>Phil Clayton wrote: >> >> Purchased a Sanyo MBC 550 today at the local thrift for $3.50.. >> Just the CPU, no monitor or Keyboard.. >> Haven't really tested it yet, but I did power it up with no monitor or keyboard >> and it tried to access drive A: >> Wonder if this thing has any real value. >> Anyone know how many of them were produced ? > >I was over at the thrift store today, and saw a Sanyo MBC 555 and the >monitor for $1.91 each; don't know if it had a keyboard or not. I have >three of them here along with keyboards, and two monitors. Can you get me a monitor & keyboard ? I goto the thrift stores all the time here in Fort Myers, FL and have never seen one of these in all the piles of computers I rumage through all the time. Must depend on where you live. I guess I will box this thing up and add it to my ever increasing collection of obsolite computers taking up more and more space in my garage. And I thought I got a good buy at only $3.50.. <Grin>!!! Phil...

27 years, 7 months

new stuff

by dogas＠leading.net

-----Original Message----- From: Cameron Kaiser <ckaiser(a)oa.ptloma.edu> >::Greetings Dyslexia of Borg, I am Typo from the planet Vulcan. >Hmm, my sister and I came up with Damn, you figured it out... I'm your long lost sister... ;)

27 years, 7 months

new stuff

by dogas＠leading.net

err.... mcs-4, mcs-8, of course... I am Dyslexia of Borg, fusistance is retile. Your ass will be laminated. ;) - Mike: dogas(a)leading.net

27 years, 7 months

Who invented the internet?

by edick＠idcomm.com

Well, if you mean the rescue I think you mean, it's actually in the Indian Ocean. That's where the Challenger went down. The fuel tank and solids (booster rockets) went down near Florida, but the Challenger went down on the far side of Africa if memory serves me. I, along with others, had the job of analyzing the potential failure modes in the engine controller in the wake of the Challenger accident. It's quite an interesting device, considering it's made of really old and simple TTL logic with plated wire memory (faster, though not much, than core of that generation). It had no stack, and therefore a different way of "calling" a subroutine, requiring you to have your program store in read/write memory. This ultimately meant that flaws masked by the redundancy of the system could become "inherited" from one mission to the next. There were other pitfalls as well. Dick ---------- > From: Sam Ismail <dastar(a)ncal.verio.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: Who invented the internet? > Date: Wednesday, February 17, 1999 11:53 AM > > On Wed, 17 Feb 1999, Richard Erlacher wrote: > > > It's somewhat divergent from the current topic, but it might interest some > > to know that the Honeywell '516 is the engine control computer which was > > still in use on the space shuttle at the time of the Challenger accident. > > There were two, one redundant, for each engine, of which I believe there > > were three. > > Do I sense a potential rescue mission somewhere off the coast of Florida? > > Sellam Alternate e-mail: dastar(a)siconic.com > ---------------------------------------------------------------------------- -- > Always hasslin' the man. > > Coming in 1999: Vintage Computer Festival 3.0 > See http://www.vintage.org/vcf for details! > [Last web site update: 02/15/99]

27 years, 7 months

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