test-drb June 2002

test-drb@ccmp.vtda.org

205 participants
502 discussions

OT: Ripping Phone Books (was RE: Computers in Public Xport)

by Robert_Feldman＠jdedwards.com

Ripping a phone book in half is really quite easy if you know the trick. Just break the spine (it helps if the humidity is low, so the paper is less flexible) first. Once the pages are torn at the spine, you can rip them the rest of the way. -----Original Message----- From: Sellam Ismail [mailto:foo@siconic.com] Sent: Thursday, June 20, 2002 11:54 AM To: cctalk(a)classiccmp.org Subject: Re: Computers in Public Xport <snip> I always did want to learn how to rip a phone book in half with my bare hands but never got around to ordering. Sellam Ismail Vintage Computer Festival ---------------------------------------------------------------------------- -- International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

22 years, 9 months

Acoustic delay line??

by dwightk.elvey＠amd.com

>From: "Rick Bensene" <rickb(a)bensene.com> > >This could be a mercury delay line. Remington Rand did use mercury >delay lines in >some of their early computers. > Hi Rich A mercury line would have a hose with mercury in it ( or metal tubing ) and tranducers at each end. I've seen several of these and this is not one. I suspect that it is some kind of lamp or heater. For what, I don't know. Dwight

22 years, 9 months

Acoustic delay line??

by dwightk.elvey＠amd.com

Hi I'm going to make a wild guess. This was a flash tube used to sychronize a neon light computer. Anyway, I don't think it is a delay line. Dwight >From: "Gary Hildebrand" <ghldbrd(a)ccp.com> > >Bill Sudbrink wrote: >> >> I've never seen one and couldn't find a clear picture >> on the web anywhere. Is this an acoustic delay line? >> >> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=887259145 > >I'd guess that it is either a TWT, or maybe an X-ray tube of some sort. >Definitely NOT a delay line. > >Gary Hildebrand >St. Joseph, MO >

22 years, 9 months

Bulk Tape Eraser

by mythtech＠mac.com

I just found a box of stuff that hasn't seen the light of day since my company moved to our current building some 15 years ago. In it was a Bulk Tape Eraser. The box pictures it being used on 5.25 floppies (as well as an 8 track tape and reel to reel tape). Is it safe to use on floppy disks? I have a stack of HD 3.5's that I want to blank out. Previously I just run them thru a computer to format them, but if a bulk tape eraser can be used, it just saves me the trouble. Also, how exactly are you supposed to use one? It has been as long since I used one (probably this same one, used to use it to blank reel to reel audio tapes). I thought I remembered that all you do is turn it on, hold it over the item for a few seconds, wave it back and forth a bit, and that was it. The item would be erased. I just tried this one on a VHS video tape, it doesn't seem to do anything to it. The picture is slightly distorted, but the tape is certainly not blanked, not even close. I left it on for a good 30 to 45 seconds (the label on the side of it says 1 minute on 20 minutes off, so I didn't want to go beyond 1 minute). It has a momentary switch on the handle, so it clearly isn't designed to be left on very long. It makes a slight humm when on (and vibrates just a touch, nothing visible, but you can feel it in your hand) so I assume it is working. However, this is a Radio Shack brand item, so who knows if it is doing what it should considering it is probably over 20 years old. Any clues? -chris <http://www.mythtech.net>

22 years, 9 months

9-track round-reel tapes available

by bill＠timeguy.com

My company is cleaning house and throwing away a bunch of 9-track round-reel mainframe tapes. If anyone can use some and is willing to pay shipping (or pick them up in Nebraska) I will grab some. Let me know by private e-mail please.

22 years, 9 months

[CCTECH] WTD: Datasheets for old Sierra modem ICs

by philpem＠dsl.pipex.com

Hi, I've just finished pulling an old Sierra Semiconductor FSK modem chipset off an old modem board and I've hit a brick wall - I can't get any datasheets. Sierra (now known as PMC-Sierra) don't have the datasheets, their disti (Memec) don't have them... The only site/company that does have them is FreeTradeZone (www.freetradezone.com), but I don't fancy paying $10,000 per year for maybe two or three datasheets a year. BTW, the ICs are: SC11011 SC11026 SC22201 Anyone got datasheets for these things lying around? Finally, anyone know how to straighten pins on a QFP packaged IC without breaking them? I've got a Motorola DSP (QFP100 package) but I managed to bend some of the pins when I desoldered it... Thanks. -- Phil. philpem(a)dsl.pipex.com http://www.philpem.dsl.pipex.com/ _______________________________________________ cctech mailing list cctech(a)classiccmp.org http://www.classiccmp.org/mailman/listinfo/cctech

22 years, 9 months

Network card for LaserJet

by Antonio.Carlini＠riverstonenet.com

> F.Y.I. - My Cabletron MRXI hubs have RJ-45 sockets, for hooking up >to a serial VT420 terminal... :) > But, yes, I agree. Those hubs are the only time _I've_ seen RJ-45 >used for serial communication. Various terminal servers use RJ45 for serial comms. One of the selling points of CAT5 was that you wire your building once with CAT5 and then can use the same wires for voice and data. The data was usually either ethernet traffic or serial comms (for printers and such). The connectors were invariably (at least in my experince) RJ45 for both ethernet and serial (and ISDN too). Antonio

22 years, 9 months

how to preserve old RL01 pack data?

by fran＠hexamon.org

I have some old DEC RL01 packs with PDP-11 diagnostic utilities - these are DEC originals: AX-E380L-MC DLDP+DIAG#1 + DECX A1 SYSTEM A AX-E441L-MC CZZLBLO DLDP+DIAG #2 + CPUTST + DECX B1 SYS B They won't last forever, and I don't have any spare media to back them up to, so I'd like to archive this software onto my PC (for posterity - or perhaps to make available to other hobbyists for use in the emulator, though I'm not sure whether the Mentec license would cover this - it does say "and associated utilities" however). The question is, how can I get a copy of a pack as a binary image onto the PC ? (to load in simh for example ?) I have a working serial port, and I can run kermit OK on RT-11. However, even if RT-11 will read the pack in DL1: (and I'm not even sure of that), how can I persuade kermit to take a copy of DL1: as an image ? I haven't found a way of doing this. Simply doing "get DL1:" doesn't seem to work. Is there any kermit-like software out there that has a PC client and can do a disk image transfer ? Thanks in advance, F

22 years, 9 months

DEC Pro350

by pat＠purdueriots.com

EET'S ALIVE! Well, I finally hobbled together a 'console cable' that connects its monochrome output to my TV and to a LK201 keyboard. Now I just could use a 'better' OS for the thing than P/OS. [Also, I could use soemthing that told me how much memory it has in it...] Has anyone ever hacked RSX-11M or RSX-11M+ to work on it? Are there any guides for RSX-11M(+)? How should I cure my insanity? :) Is VENIX worth trying on this thing? -- Pat

22 years, 9 months

Making RT-11 bootable

by mbg＠TheWorld.com

>OK, I now have a bootable RX-50. My question is what is the difference >between DL.SYS and DLX.SYS drivers? Is the non-x version unibus and the >with-x version qbus or something? The dd.SYS form of the driver is for the SB (formerly SJ) and FB monitors (kernel, for unix weenies :-) The ddX.SYS form of the driver is for the XM (XM, ZM, ZB) monitor(s). These last monitors are the ones which have directives for controlling extended memory (anything beyond 64kb) and the drivers know how to get data from, and put data to, user buffers in extended memory. Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | email: gentry at zk3.dec.com (work) | | Unix Support Engineering Group | mbg at world.std.com (home) | | Hewlett Packard | (s/ at /@/) | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 (DEC '77-'98) | required." - mbg KB1FCA | +--------------------------------+-------------------------------------+

22 years, 9 months

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test-drb June 2002