test-drb July 1998

test-drb@ccmp.vtda.org

154 participants
898 discussions

taking care of bad sectors... easy stuff. Was: Re: hard

by allisonp＠world.std.com

< OK, easy on that anti-MS stuff. Kai might be reading :) Anyway, Scandisk < is useful for erasing lost files which is all I use it for. Does anyone First of all MS didn't write scandisk... anyone that uses norton tools should recognize it. it a stripped vendor version the norton tool. I have had excellent success with norton tools and still used copies I've had for over 8years. Allison

26 years, 5 months

IBM 3380 HDA

by Philip.Belben＠powertech.co.uk

> In a message dated 98-07-15 10:58:12 EDT, you write: > > << I just acquired an IBM 3380 HDA which weighs 70 lbs, and is in a clear > plastic case. Does anybody know the lineage of this? The HDA has IBM > 390X-001 as well as 13-E8719-CJ printed on a label. > >> > > hmmm, i remember seeing 3380/3880 dasd units back in 1992 when i was a > computer operator running an IBM 4381 and later an ES9000. kinda useless for a > pc although fascinating to look at. belt drive and everything! 3380s and 3880s were certainly around when I was at IBM in 1985-86, mostly on 308X mainframes. I'll have a look-see if I have any info (probably just marketing bumf as usual). It is the clear plastic case that intrigues me. Do you mean you can see the platters and heads and things? I have a vague memory of the HDs in our system/34 being like that. Nice. I also once saw a later disk model (9330 or something like that?), demo version, which not only had a clear plastic case, but had the platters replaced by discs of clear plastic, too. It didn't power up or anything - strictly for showing tourists when on the factory tour... Philip.

26 years, 5 months

Places to visit in Silicon Valley?

by kaikal＠MICROSOFT.com

Nope, I'm not that Kai, and I'm far from a recent addition to the group, either :) Kai -----Original Message----- From: Russ Blakeman [mailto:rhblake@bbtel.com] Sent: Thursday, July 16, 1998 5:39 AM To: Discussion re-collecting of classic computers Subject: Re: Places to visit in Silicon Valley? Kai Kaltenbach wrote: > I'm going to be visiting the silicon valley area and I'd appreciate any tips > on where to look for interesting old computer gear. > > This is a one-time visit so if you're afraid of spreading the word around on > your favorite spots, send me email instead of posting to the list, I won't > tell anyone your secrets, I swear! Is this the same Kai that the "power goo" software was/is created by? Haven't seen the name in here before and guessing he's a recent signon? (I may just be on a drug flashback and imagining all of this) -------------------------------------------------------------------- Russ Blakeman RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144 Phone: (502) 756-1749 Data/Fax:(502) 756-6991 Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com Website: http://members.tripod.com/~RHBLAKE/ ICQ UIN #1714857 AOL Instant Messenger "RHBLAKEMAN" * Parts/Service/Upgrades and more for MOST Computers* --------------------------------------------------------------------

26 years, 5 months

How many computers?

by pete＠dunnington.u-net.com

On Jul 16, 1:50, Tony Duell wrote: > Subject: Re: How many computers? > > >That sounds like a Torch Graduate machine. An MS-DOS copro for the BBC=20 > > >micro. I have one, but alas I'm missing the host ROM and systems disk = > > for=20 > > >it :-(. > > I dont thing it needs a rom in the BBC , I have the system disks If > > I am suprised. I guess it works with the standard Tube host routines. > Odd, as it doesn't (IIRC) contain a Tube ULA. Or does it use the same > host ROM as the Z80 copro (those I have). > > Does anyone know for certain? I'd not want to waste your time if there > are other bits I need. I'm sure it doesn't use the standard Tube routines; in face most Torch devices play merry hell with Acorn's Tube code, which tends to see that something is there but can't deal with it. I suspect it used the same ROM as the Z80. A colleague used to have a Graduate, so I'll ask him today. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 5 months

Off-topic informational anti-spam anecdotal

by maxeskin＠hotmail.com

Hey! A great way to bring this thread back on topic! How do those electronic switches work, and what is the approximate network topology of the system? Is there a reference guide to it somewhere? I'd love to take a look. >>From about the 1970s and on (somewhere around there...about the time the >first electronic switching systems start appearing) ***snip*** As far as I know, a telephone rings because when it's on hook, any current on the phone line is connected to the ringer. When someone is trying to connect, the company sends a periodic AC signal to the phone. If the caller ID data signal was sent first, it would cause jittering in mechanical ringers, and a maddening noise in electronic ones. When the ring is detected, the caller ID can 'pick up' the phone line briefly to check the data signal, which should be extremely brief. The station knows to keep ringing the phone if the user has caller ID. This is my theory. >I don't know the specific reasons that are behind sending the data burst >after the first ring. It may have a lot to do with the caller ID boxes >needing some sort of indicator to let them know a call was coming and they >should start monitoring for the carrier. I think the caller ID boxes >could have easily been designed to continually monitor the line for a >carrier and then capture the data that came before the first ring. > >Sam Alternate e-mail: dastar(a)siconic.com >------------------------------------------------------------------------------- >Ever onward. > > September 26 & 27...Vintage Computer Festival 2 > See http://www.siconic.com/vcf for details! > [Last web page update: 07/05/98] > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

26 years, 5 months

A couple more questions, 8/M's and Es

by mcquiggi＠sfu.ca

Hi Chuck: > My question is how can I figure out if the 8/M chassis has the > requisite 8v lamp supply so that if I found an 8/e front panel I > could plug it in? Alternatively, if I pulled the 8/e panel I have > off, and plugged it into the other one to see if it would work, > would this damage it? (the FAQ says that you can run the LED > panel on an E but the going the other way is ambiguous.) You can run a LED front panel in an 8/E, Tim Shoppa and I tried this about January. There are two connector lugs on the left hand side of both types of front panels. The 8/e uses both lugs, an 8/f or other LED-style panel only the blue. The blue lead is -15V, the yellow is 8V. The lugs on the front panel are labelled "YELLOW" and "BLUE", just connect the proper wires. Leave the yellow wire unconnected to use the LED front panel in your 8/e. This works, we tried it. To find out if your supply has an 8V output, best dig out the voltmeter and check the leads coming from it! > I need an omnibus extender card, did such a thing > exist? I'm sure that they did, but I've never seen one. I'm currently waiting on connectors so that I can make one. Heck, I could make two if you need one. If anyone wants to make their own, the connectors are hard to find. Here's a suitable part number: Manufacturer: EDAC, they're at 416-754-3322 Part #s: 346-036-540-201 346-036-541-201 346-036-540-202 346-036-541-202 346-036-540-802 346-036-541-802 Any of these connectors will work, they are 0.125" spacing 36 contact edge connectors, 18 per side. You'll need 4 for an omnibus extender. The first two types are best, as they don't have mounting ears. The last 4 parts have mounting ears that can easily be cut or ground off to allow the connectors to be properly spaced. Hope this helps, Kevin -- Kevin McQuiggin VE7ZD mcquiggi(a)sfu.ca

26 years, 5 months

How many computers?

by Philip.Belben＠powertech.co.uk

Phil Beesley wrote: >> -----Original Message----- >> From: dave dameron <ddameron(a)earthlink.net> >> >Speaking of books, >> >has anyone seen the book "We Built our own Computers" by A.B. Holt, >> >Cambridge Univ. Press, published about 1966. > > If anybody in the UK is interested in getting this book, I saw a copy > of this recently (two or three pounds) and I'm happy to go back for > it. Yes please. I'll try and pop into Leic. again soon and pick it up (I live at Coalville). If I thought I'd get to Leic. this weekend I'd say, tell me where and I'll buy it myself. But I am fully booked for the next three weekends, I think :-( Philip. PS Don't forget to read it before you give it to me!

26 years, 5 months

Question on DEC file formats

by allisonp＠world.std.com

< > < Will an RL01 pack be readable in an RL02 drive? < > < > Yes. < < I think you have to rejumper the RL02 to RL01 for it to work. Bill, you just got the good memory award. ;) Allison

26 years, 5 months

Off-topic informational anti-spam anecdotal

by allisonp＠world.std.com

<If the caller ID data signal was sent first, it would cause jittering in < mechanical ringers, and a maddening noise in electronic ones. When the < ring is detected, the caller ID can 'pick up' the phone line briefly to < check the data signal, which should be extremely brief. The station < knows to keep ringing the phone if the user has caller ID. This is my Wrong. Caller id senses the ring and does not go off hook as that would disturb the CO and it is uneeded. Instead the ring is an alert to the caller ID that data will follow and it's already camped on the line using a non-DC (capacitor coupled) connection to avoid loading the line. this allows it to hear the ring and the data. Allison

26 years, 5 months

Off-topic informational anti-spam anecdotal

by allisonp＠world.std.com

< Well, then why don't the other phones sound out the data string with the < ringers? The amplitude is low compared to the ring signal and it's very short blip of data. Ring is 90-120v, voice and id are in the under two volts region. Max, please edit the copy string! bandwidth is limited and I can remember what I wrote even at my advenced age. Allison

26 years, 5 months

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test-drb July 1998