- test-drb@ccmp.vtda.org - classiccmp.org

by tothwolf＠concentric.net

I guess this is only slightly OT, since this particular recorder dates >from around 1948-1950 ;) I managed to rescue a Webster Chicago model 79 wire recorder from a shelf that was overlooked in my friend's shop after most of it had been dumped into the dumpster. The model 79 was sold as a bare-bones unit without any audio circuitry, while the model 80, which used the same mechanism, was a complete unit. A little more info about Webster Chicago wire recorders can be found at [http://www.rci.rutgers.edu/~dmorton/webcor.htm], and more info about wire recorders in general can be found at [http://www.rci.rutgers.edu/~dmorton/wire_recorders.htm]. The audio circuitry that my friend built for this model 79 appears to be long gone, so in order to play back the 3 reels of wire I also rescued, I'm going to have to recreate it. I managed to found the instruction manual in a binder in the dumpster, but I don't have a service manual (though I'd certainly like to find one). The instruction manual covers the use of the model 79 and a basic design for the audio circuitry. If anyone else has a model 79 or 80, or thinks it might otherwise be worthwhile, I'm willing to scan the manual if someone has a place to host it on the web. -Toth

23 years, 9 months

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EIA 232 vs. 422, Color Computers (was Re: Serial floppy drives)

by dwightk.elvey＠amd.com

>From: "Gary Hildebrand" <ghldbrd(a)ccp.com> > >Eric Smith wrote: >> >> > <snip> > Connecting EIA-232 directly to EIA-422 could let the smoke >> out of something, and we certainly wouldn't want that. >> > >ISTR that 422 was simply a balanced line version of 232. I think you >can just tie to the non-inverting line and ground and make it work. >Unless there's something else needed. > >Gary Hildebrand >St. Joseph, MO > NO!!!! RS-422 inputs should not normally excede 7V. Many RS-232 are driven with 12 volts. Also, RS-422 is offset above ground and not intended to take large swings below ground. Most RS-422 receivers do not include ground as part of their common mode operation, so you can't tie one input to ground and get it to work. Dwight

23 years, 9 months

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also interesting on eBay

by pete＠dunnington.u-net.com

On Sep 6, 7:07, Andy Holt wrote: > another item on UK eBay may also be extremely interesting ... if rather > expensive: > http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2051100106 > is a BBC Domesday setup in (mostly) working order. AFAICS the only notable problems are the scratch on the video montage disc, which might be less of a problem if the buyer solved the other problem: lack of the remote control. The remote is only used to skip through the montage (which is one of four sides), it's not used for anything else, so it's not a big deal. However, I'll make the same offer I made to the BBC mailing list when it appeared there: if the winning bidder is a list member, contact me, as I think I have a spare remote for the player. I may also have a manual (but probably not the complete set). BTW, the seller appears to have the other two interactive discs that were released for the system, in his other auctions. Of course, the LaserVision player will play "ordinary" LaserVison video discs as well. -- Pete Peter Turnbull Network Manager University of York

23 years, 9 months

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[jpadilla@students.uiuc.edu: Re: p.s. Re: card reader (fwd)]

by dtwright＠uiuc.edu

Hey everyone, This is a request from someone in Aeronautical Engineering at the University of Illinois. If you think you can help him out, please contact him directly. Thanks, Dan ----- Forwarded message from "Jose F. Padilla" <jpadilla(a)students.uiuc.edu> ----- Date: Tue, 3 Sep 2002 17:29:20 -0500 (CDT) From: "Jose F. Padilla" <jpadilla(a)students.uiuc.edu> To: Dan Wright <dtwright(a)uiuc.edu> Subject: Re: p.s. Re: card reader (fwd) Dan, a shoe box full of 80 column punch cards containing an old FORTRAN code would be converted to an ASCII text file. Thanks. -Jose >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< Jose F. Padilla, Research Assistant and Graduate Student Department of Aeronautical and Astronautical Engineering University of Illinois at Urbana-Champaign Work: 217 244 1447; Base: 217 377 7310; Christ Delivers >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< >=< ----- End forwarded message ----- - Dan Wright (dtwright(a)uiuc.edu) (http://www.uiuc.edu/~dtwright) -] ------------------------------ [-] -------------------------------- [- ``Weave a circle round him thrice, / And close your eyes with holy dread, For he on honeydew hath fed, / and drunk the milk of Paradise.'' Samuel Taylor Coleridge, Kubla Khan

23 years, 9 months

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IBM Aptiva for parts

by SUPRDAVE＠aol.com

In a message dated 9/4/2002 8:41:34 PM Eastern Daylight Time, rschaefe(a)gcfn.org writes: << Move-out week is over on campus, but I decided hit a couple of alleys on the way home anyway. The only thing of interest I found was a skinless, stripped Aptiva that I nearly passed up, but then I noticed that the slots were on an active riser card so I picked it up anyway. The power supply has some extra wires on it, too. I figure these are odd enough to be hard to replace if you get a bad one. If anyone wants the parts for $postage, let me know. I've got: >> is there a machine type/model number listed anywhere? sounds like a 2168-??? model. -- Antique Computer Virtual Museum www.nothingtodo.org

23 years, 9 months

2
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DEC T-11 evaluation board (attn: Tony Eros)

by mbg＠TheWorld.com

I haven't received my board yet (I bought the third one of them that was up at auction on ebay). Wehn it comes in I will be very interested in learning how to operate it and maybe get something running on it... 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 | +--------------------------------+-------------------------------------+

23 years, 9 months

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OT Housecleaning -- Hazeltine 1552 terminal

by zaft＠azstarnet.com

I have an old Hazeltine 1552 terminal with docs that I need to get rid of, I am cleaning house. IT DOES NOT WORK, as far as I can tell -- screen powers up filled with junk. It's probably fixable to those that are handy with such things. Anyway, anyone wants it and is willing to come get it or pay for shipping, it's yours, otherwise it goes to the recyclers next week. I'm in Tucson Arizona. Please respond offlist. Gordon Gordon Zaft zaft(a)azstarnet.com

23 years, 9 months

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WTD: Microvitec "CUB" 653 service/user manuals

by philpem＠dsl.pipex.com

Hi, I'm trying to track down a Service Manual and a User's Manual for my Microvitec Cub 653 RGB monitor. Has anyone here got copies of these manuals? I'd be willing to pay for photocopying, though it would be easier for me if you could just put the manuals in a scanner and send me the resulting image files. I have access to an FTP site I could use for this purpose. Thanks. -- Phil. philpem(a)dsl.pipex.com http://www.philpem.dsl.pipex.com/ PGP Key ID: 0x0E18C95F PGP Key Fingerprint: 2741 5CB7 1D45 6F77 D1FC FA3D 7A87 2DA4 0E18 C95F

23 years, 9 months

2
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EIA 232 vs. 422, Color Computers (was Re: Serial floppy drives)

by dwightk.elvey＠amd.com

>From: "Fred Cisin (XenoSoft)" <cisin(a)xenosoft.com> > >> > similar. 422 by the way is specified to go almost 1000 feet, while with 232 >> > you are lucky to get over 10 feet. Regards - Mike > >On Thu, 5 Sep 2002, Sellam Ismail wrote: >> That's not true. Serial cable can go for a good many feet before the >> signal breaks down (someone should pipe in with actual data ;) > >It'll handle way more than its spec calls for. When researching the >content for "RS232 Solution", Joe Campbell ran it through a couple of >thousand feet of wire (on a spool). Well, I guess that by being on a >spool, the two ends were less than 10 feet apart. :-) > > >The original IBM PC Parallel Printer Port was the one that was spec'ed at >10 feet (3 meters). I often ran 30 feet with it. >I have no idea what the spec is for 1284. > > Hi Fred Did he stretch the spools out and put a 5 PH blower that cycles on and off in each machine at the ends. I think not! There is a big difference between running a signal through a spool ( effective length for noise being vary short ) and running in a low noise environment as compared to many real world environments. In the spool, he was only looking at resistive loss and not any of the other factors. On your PC example, it was intended to run in a low noise environment. If it failed to work, IBM would simple shrug and say 'You are only suppose to run it with a nice PC and nothing else. It was never intended to be used like that.' Besides, the parallel port is suppose to be a terminated signal and not subject to issues of under driven, as in the case of RS-232. Dwight

23 years, 9 months

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EIA 232 vs. 422, Color Computers (was Re: Serial floppy drives)

by dwightk.elvey＠amd.com

Hi 422 can be an impedance controlled line with terminations. 232 tends to be under driven on typical lines and unterminated. This means that an 232 signal will look like a stair case to the receiver input that on long runs may cause intermittent edges. At lower baud rates, most 232 receivers can handle this much distortion. Also, since it is under driven, the signal can be corrupted by even a small amount of outside noise. This is made even worse because it is single ended and any common mode noise can corrupt the signal. In other words, just because you ran it in your house for 30 feet and never saw an error doesn't mean it can be done in all cases. 422 is impedance controlled and can be used at baud rates up to 5 or 10 MHz ( depending on manufacturer ). It can do this until resistive losses bring the level too low to be detected. Being differential, only common mode noise that pushed it beyond the common mode will be an issue and if the noise is short term, the receivers are designed to not switch the outputs until they are brought back into the common mode. I once designed a communications bus using RS-485 ( similar to RS-422 ) lines to interconnect several machines in a noisy environment. The previous design used RS-232 and was not robust enough to work in that same environment. The lines were less than 15 feet on the RS-232. The RS-485 setup ran for over 10 years without logging a single bit of data loss ( there were several component failures during that time that don't count ). Dwight >From: "Mike Feher" <n4fs(a)monmouth.com> > > >OK, I may be wrong, ( will not be the first time) I do have the original >Mil-STD or EIA specification on these interfaces, and admit that it is not >my specialty, however, it is fact, to the best of my recollection, that 422 >will be reliable over a lot more distance than RS-232. I will dig out the >document, when I get a chance and quote actual specified numbers. Regards - >Mike > > > >Mike B. Feher, N4FS >89 Arnold Blvd. >Howell NJ, 07731 >(732) 901-9193 > > >----- Original Message ----- >From: "Sellam Ismail" <foo(a)siconic.com> >To: <cctalk(a)classiccmp.org> >Sent: Thursday, September 05, 2002 9:24 AM >Subject: Re: EIA 232 vs. 422, Color Computers (was Re: Serial floppy drives) > > >> On Thu, 5 Sep 2002, Mike Feher wrote: >> >> > similar. 422 by the way is specified to go almost 1000 feet, while with >232 >> > you are lucky to get over 10 feet. Regards - Mike >> >> That's not true. Serial cable can go for a good many feet before the >> signal breaks down (someone should pipe in with actual data ;) >> >> 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 * >> >> > >

23 years, 9 months

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Serial floppy drives

by tlindner＠ix.netcom.com

Did anybody ever market a floppy disk system that communicated via RS-232? -- tim lindner tlindner(a)ix.netcom.com

23 years, 9 months

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PDP-8 "Introduction to Programming"

by Antonio.Carlini＠riverstonenet.com

> I have a very ratty paper coverless copy here.:) If it's that ratty, finish the job and drop through an sheet fed scanner :-) Antonio

23 years, 9 months

2
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DEC T-11 evaluation board (attn: Tony Eros)

by MichaelDavidson＠pacbell.net

Last month Tony Eros was asking about documentation for the DCT11-FM T-11 evaluation board. I don't have any documentation, but I do have one of the boards and am in the process of creating an annontated disassembly of the monitor program. I would be happy to share this and/or compare notes with Tony and anyone who is interested. Michael Davidson michael_davidson(a)pacbell.net

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>> my Rockola >> jukebox is like that) > > >Fine machines...I used to repair/maintain them many moons ago! >Wish I could afford to buy one now. I got mine from a friend. He was moving and didn't plan to take it with him. So he said I could come get it, but had to remove it from his basement. It is about the size of a thin desk, and weighs maybe 200 lbs (it is a table top like design, not the more stereotypical upright as seen on Happy Days). So I arranged to get a pickup, and a few large friends to help haul it >from the basement. When I arrived, I found that my friend decided not to wait for me, and had put it out on curbside. I last spoke with him a week earlier, so I'm not sure how long it had been there. It had been raining all week to boot! The top had been opened by someone else, and any of the 45's that were reachable had been removed, as well as much of the carousel had been damaged from attempts to remove 45's that weren't reachable. Needless to say, I was pissed! But I took it, and spent the next two weeks on my back inside the thing, taking it apart, cleaning the rust, and repairing damaged parts. (I lucked out, the service manual was still inside, and remained mostly dry, so it was readable). It runs 99% fine now, and sounds pretty nice (very nice for an early 50's sound system, but obviously not quite as good as my surround sound system). The only problem it still has is one of the carousel selector sensors doesn't always make good contact, and if you try to play the 45 in that slot, it sometimes get stuck and just keeps spinning, never selecting the record. My guess is a spot of rust (much of it was rusted when I worked on it), but it is a pain to remove the unit, so I have ignored it for now. I still of course have to refinish the outside, as it was just totally damaged in the rain (the chrome plate rusted and bubbled off, the woodgrain siding peeled, and some decorative trim came unglued). When I buy a house, and have more room to work on it, I'll refinish the outside... but for now it lives at my parents house, and they just can't have nice things, so no sense fixing it up just for them to trash it again. -chris <http://www.mythtech.net>

23 years, 9 months

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Free MicroVAX Diagnostics on 5.25" Disk (RX50)

by tsm＠palindrome.org

I have three sets of MicroVAX Dagnostics V2.1 on 5.25" disks. Also, I have one box of 10 unused RX50 disks. Anybody interested? Free to whoever will pay postage. Thanks, Terry

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>> You can not reuse needles, nor can you sharpen them. With the >> acoustic-era machines, needles are used exactly *once*. Play the record, >> then pitch the needle. If you reuse needles, you will wreck the records. > >So,... >are you saying that it is also not a good idea to tape a stack of quarters >to the top of the tone arm to stop it from skipping? Since I only have the one acoustic player, I can't say for all designs. But my Victrola has a weight already attached, and a pretty heavy one at that, so I wouldn't dream of doing such a thing. As is you have to tilt the needle down into place gently or it will tip and slam the needle into the record pretty hard (hard enough to put a nice puncture wound into a finger as I learned from experiece). Although, I know of people doing that with arms for newer analog turntables. But then in every case it was either because the person had a REALLY cheap one, or they didn't realize that there was a counterweight on the back of the arm already (I've seen a few where the weight is under the plastic cover to the arm, so it isn't obvious its there... my Rockola jukebox is like that) -chris <http://www.mythtech.net>

23 years, 9 months

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Free MacUser Magazines ('91 - 97') Austin, TX

by tsm＠palindrome.org

I have approximately 100 issues of MacUser from 1991 - 1997. Anybody collect these? Free for pickup in Austin, or will ship at your expense (book rate). Will put in dumpster if nobody wants. Thanks, Terry

23 years, 9 months

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FWD: TRS-80 Model I up for grabs (fwd)

by ajw＠awsoftware.org

FYI ---- Forwarded Message ---- Date: Thu, 05 Sep 2002 02:35:37 -0700 From: George Phillips <gp2000(a)shaw.ca> To:trs80@cs.ubc.caCc:fverde@comcast.net Subject: FWD: TRS-80 Model I up for grabs [ trs80(a)cs.ubc.ca only accepts posts from members purely to avoid spam. I'm forwarding this one to the list since it is clearly appropriate. ] I have a TRS 80 (bought Dec 1979) and lots of magazines (Computronics), manuals, original box, some software. Does anyone want this stuff before I take it to the dump? Frank Verde fverde(a)comcast.net 410/296-7531 (Baltimore, MD)

23 years, 9 months

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Teac FD-55GFR 5.25" floppy drive driver

by Sofiana810＠hotmail.com

Hi tehre, I have read your message, can you tell or give me the TEAC FD-55GFR driver. Please reply to me ASAP. Thank you very much

23 years, 9 months

1
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Old Computers - Xerox

by kmarsh＠dnsllc.com

I was just viewing your site. I was wondering if you or anyone else would be interested in a Xerox 6085 System and a Xerox 4045 Laser CP Printer. Items included are: the Xerox 6085 CPU, 19" monitor, keyboard, infrared mouse, external 5 ?" floppy disk drive, Xerox ViewPoint Series Software (on 5 ?" floppy disks), additional 5 ?" floppy disks, Xerox 4045 Laser CP Printer, printer cable, and user manual for printer. Both are in working order. We have some photos available that I can e-mail to you if you are interested. We were thinking about putting the items on eBay, but haven't done so yet. If you would like to make an offer, please do so. I look forward to hearing >from you in the near future :-) Kathy Marsh Office Manager Distributed Network Software 3250 West Lake Road Erie, PA 16505 (814) 838-5151 8A-3P, EST, Mon-Fri

23 years, 9 months

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Info on the Dynalogic Hyperion

by lbutzel＠home.com

Looking for info on the Dynalogic Hyperion, a "portable" DOS machine manufactures around 1983. At least the one I have is 1983. it was designed and initially built in Ottawa, Canada. Hyperion was acquired in about 1983 by Bytec, who was later bought by I think a Quebec company called Comterm. Anyway, mine has stopped working: The machine still boots but no image is displayed on its 7" diag screen. Hence I am looking for service info and/or persons who have worked on the machine. Any leads would be most appreciated. Leo Butzel Seattle, WA lbutzel(a)home.com

23 years, 9 months

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OT/Old Recordings/Shameless Plug

by mythtech＠mac.com

>Why XP instead of 2000? My Tivo -> SVCD projects went 15-20% slower on XP >vs. 2K, so I dropped back. I *despised* that damnable kandy-koted GUI crap, >too... If you are serious about these kinds of conversions, you might want to look into the VCD burner from Terapin. Its a little pricey (about $600), but it burns directly to VCD like a VCR, and works GREAT. It also claims to bypass macrovision when duping VHS or DVD, but I admit, I have not tried to copy a macrovised item yet (I only use mine for live recording, or for saving iMovie created movies to VCD since it is MUCH faster to do realtime output via a scan converter to the VCD burner, than it is to wait for my iMac to render a VCD compatible MPEG) -chris <http://www.mythtech.net>

23 years, 9 months

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RF NTSC to PAL and SECAM to PAL conversions

by mythtech＠mac.com

>I have a problem with the RF video output of some of my old micros. The use >either american or Japanese version of NTSC on VHF/UHF, and all my equipment >is PAL compatible. > >I have the same problem, with some old French micros, that use SECAM RF >output only. > >I am looking for converters but I cannot find any. Could anybody help me? There are many NTSC to PAL converters out there. J&R sells a few I know. They can also be had for fairly cheap ($40 and up). Other formats or conversion directions are a different story. PAL to NTSC is also fairly easy to find, but prices tend to start closer to $200. And anything dealing with SECAM is going to be more costly, and more difficult to locate (usually at that point, you end up getting a universal converter, and spend $500 or more). A slightly bigger problem might be getting one that works with a VHF signal... most of the ones I have seen expect it to be line composite. -chris <http://www.mythtech.net>

23 years, 9 months

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Retitle: ISC S-100 Computer/Seattle Comp. Products S-100 Cards

by gstreet＠indy.net

Hello All, I'm going to repost this since this message's title was so obscure in the "Table of Contents" of messages that is included with each mailing. Back on June 9th of this year (Classic Tech Eletter #11), someone thoughtfully posted the paragraph at the bottom of this message (on this newsgroup). Coincidentally, I had already found the same S-100 computer and I eventually ended up winning the bid (luckily [I think] I was the only bidder). I only very recently received this machine (it was slightly damaged in shipping, and it _really_ was filthy! (There was an long delay in shipping it to me.) I've got the damage straightened out and I completely disassembled it for cleaning. I just got it back together last night and turned on the switch. I seems to power up and the led's come on (led near the on/off switch and 3 led's on the backplane/motherboard). I talked to one person who said that he thought that he'd had an ISC computer before, but that it wasn't pure S-100. The reason that I bought this machine is that I have some Seattle Computer Products S-100 cards that I really want to get running. They drop in the ISC "S-100" computer _perfectly_, but I have not powered it up with the SCP cards in place. If there's something that's not "pure S-100" about the ISC, I don't want to damage the SCP cards. I just checked the link (below) and it still works. I think the link will disappear in just a few more days (90 days since first posted), so I can provide the same pictures to anyone interested after the link disappears. The reason it's taken so long to ask this question is because it took over 2 months for me to actually receive the unit (now the darned link is ready to vanish, probably on Sept 10th). http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2029719366 I cannot find _any_ information about ISC Systems Corp., Spokane, WA. It's an absolutely beautifully crafted unit and from the filthy condition that I received it in--it appears to have been left running for, perhaps, _years_! The seller claimed that he'd removed the existing cards to install in his Altair, but if that's true, someone must have already substituted different cards--in the pictures, you'll notice a bunch of twisted pair and other small gauge wires: these all appear to hook up to what would seem to be "non-standard" S-100 cards, through proprietary connectors. I cannot fathom how the original ISC cards could have been of any use to anyone except the user of another ISC system. It appears that the "non-standard" wires go to things like: keyboard, monitor, modem, a network, and "LP 1" and "LP 2" (LPT 1 & LPT 2??). There is yet another connector that I've no clue as to what it might do. _BUT_, _if_ the box itself conforms to the S-100 standard, and if I can use the SCP cards, all the other wires don't matter, because they won't be connected to anything. I've really taken a liking to this machine--I hope I can use it! Any help would be much appreciated! > >At 08:33 PM 6/9/02 -0400, you wrote: >CLASSIC TECH ELETTER, Vol. 1, Issue 11 > >It's too bad the seller gutted this ISC Systems S-100 computer. If it >sells close to the opening bid, however, the buyer will get a good deal on >an S-100 starter system. (The seller's right about the system needing a >cleaning. You could knit a sweater with all the lint stuck in the fan >vent.) http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2029719366 Thank you, Robert Greenstreet gstreet(a)indy.net

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by Innfogra＠aol.com

In a message dated 9/4/02 8:52:31 PM Pacific Daylight Time, tothwolf(a)concentric.net writes: > , I found a site called The Turntable Factory > [http://www.theturntablefactory.com/]. If you need advice or a source for > parts, it might be worthwhile to email them. Great Lead... Thanks The site has one of the best tutorials on refinishing clear hard plastic covers. The link is here: http://www.theturntablefactory.com/cover.html Very good info. Paxton

23 years, 9 months

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OT/Old Recordings/Shameless Plug

by mythtech＠mac.com

>Pretty much any copy protection system for video can be defeated by putting >a >time base corrector in the analogue signal path between the source and >whatever you are recording it on. Yup, that is why I currently dub macrovised VHS by passing them thru my computer. My PowerMac has a NTSC/PAL input, and will output NTSC or PAL. I feed the video into the mac, then run the video player software in full screen, and record the video output. It actually makes VERY nice duplicates, and defeats macrovision in the process (since I'm not really recording the original video, but rather a screen image of my computer, that just happens to have the video playing in full screen mode). But I think Apple got wise to that, because reports are you can't do the same thing with the DVD player and video mirroring (although with an external scan converter I would think you can, but not with the built in S-Video output on their newer Powerbooks). Of course, now that I just discussed this, I am in violation of the DMCA, so the Thought Police should be knocking on my door any moment now. Lucky for you, you live in a country that seems to be a bit more rational and citizen friendly (didn't Australia just pass a law that pretty much says Macrovision is illegal or something to that effect?) -chris <http://www.mythtech.net>

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>I think some of the 78s I got went to a Victrola at one time. I know there >was a Victrola over there that went to a family member, but I don't think >any records went with it. I guess that dates those 78s even older than I >thought they were. I had also noticed a couple had minor chips in their >edges, and thinking about it now, they very well might be ceramic. I >noticed an almost glass or sand-like appearance to the chipped spots. If you don't have a use for those, and want to part with them REAL cheap, I might be interested in taking some of them off your hands. Not that I am a collector of these things, but a variety of records to play on my Victrola would be nice (I only have about 20 right now, and most of those I am afraid to actually play... not to mention I only have a few new needles left, so until I can figure out a safe replacement, or a safe way to sharpen old needles, I don't really use the thing at all except to show it off to people once in a while... my 1950's Rockola juke box gets the bulk of the entertainment use, but that uses off the shelf record needles, and standard 45's, so its much safer to play away with) -chris <http://www.mythtech.net>

23 years, 9 months

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Drive-95 RE: Serial floppy drives

by rigdonj＠cfl.rr.com

Drive-95 is (was?) made by Sparcom and was originally made for the HP-95 then for the HP-200 and later for the HP-48. I won one at a HP conference a couple of years ago and Megan (the owner of Sparcom) promised me that I could send it back to the company and have it upgraded to later version. I've been meaning to do that. AFIK Drive-95 is still being made and sold. Joe At 10:05 AM 9/3/02 +1000, you wrote: >One existed for the HP-48 series of calcs. It was called (I think) >drive-95. > >The device used serial, and kermit to communicate with the calc for program >storage. > >(I *reallllly* wanted one of those...) > > > >Doug Jackson >MSS Operations Manager >Citadel Securix >(02) 6290 9011 (Ph) >(02) 6262 6152 (Fax) >(0414) 986 878 (mobile) > > > >> -----Original Message----- >> From: Fred Cisin (XenoSoft) [mailto:cisin@xenosoft.com] >> Sent: Tuesday, September 03, 2002 8:40 AM >> To: cctalk(a)classiccmp.org >> Subject: Re: Serial floppy drives >> >> >> On Mon, 2 Sep 2002, tim lindner wrote: >> > Did anybody ever market a floppy disk system that communicated via >> > RS-232? >> >> Yes, but, ... >> Only one really "caught on" >> Radio Shack "Portable Disk Drive" was sold for the Model 100. >> It was serial, but not quite RS-232. The first version was >> Single-Density? on a 3.5" disk. >> >> > > >CAUTION - The information in this message may be of a privileged or confidential nature intended only for the use of the addressee or someone authorised to receive the addressee's e-mail. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this email in error please notify postmaster(a)citadel.com.au. Any views expressed in this message are those of the individual >sender and may not necessarily reflect the views of Citadel Securix. > >Feel free to visit the Citadel Securix website! Click below. >http://www.citadel.com.au > > >Attachment Converted: "C:\EUDORA\Attach\RESerial.htm" >

23 years, 9 months

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Serial floppy drives

by dwightk.elvey＠amd.com

>From: tlindner(a)ix.netcom.com > >> On Wed, 4 Sep 2002, Tony Duell wrote: >> > However, the original question mentioned RS232. Which is _not_ the same >> > as serial. RS232 implies certain voltage levels. >> > The CBM and Atari drives do not use an RS232 interface. >> >> AND,.. >> If I recall correctly, the Tandy Pdd1, although it was "almost >> RS-232" used TTL, NOT RS-232 voltage levels. There were some trivial >> adapters available to permit it to work with "real" RS-232 signals. > >I always thought that was called RS-422. > >The Macintosh standard serial port was a RS-422 serial port. When I went >to look up what that meant, the only difference I could find was the >voltage levels. > >RS-422: 0v to 5v >RS-232: -5v to 5v > >The documentation I found went on to say that RS-422 was backaward >compatiable with RS-232. > >-- >tim lindner tlindner(a)ix.netcom.com > Hi No, 422 is not backwards compatible with 232. RS-422 and RS-485 are both specs for driving differential lines. RS-232 can be +/- 12 volts but the receiver may have lower levels ( I forgot what the requirement was ). The document was not correct about RS-232/RS-422. It may be that one could make them work under specific conditions but these signals are not backward compatible. Dwight

23 years, 9 months

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IBM Aptiva for parts

by rschaefe＠gcfn.org

Move-out week is over on campus, but I decided hit a couple of alleys on the way home anyway. The only thing of interest I found was a skinless, stripped Aptiva that I nearly passed up, but then I noticed that the slots were on an active riser card so I picked it up anyway. The power supply has some extra wires on it, too. I figure these are odd enough to be hard to replace if you get a bad one. If anyone wants the parts for $postage, let me know. I've got: motherboard, FRU 11H8440 no CPU, no RAM, no cache, video RAM upgrade not installed, has a jumper board installed in the VRM slot `7x6 riser', FRU 11H8453 6 ISA, 2 PCI (1 shared), has some active components on it power supply, FRU 06H2973, P/N 06H2971 has 3.3V, and an extra connector, keyed 3 pin with a latch, 22GA black, white, & red modem/sound card, 42H1970 ISA, Mwave `MC27802C JSW/JBR', `MD-2780/I1', `GVC-KD070101', has a little 2-conductor cable that attached to the motherboard (not CD audio) Bob

23 years, 9 months

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These darned old computers

by foo＠siconic.com

Well, I finally had some success with these old computers I've been trying to get working. The Atari problem ended up being with the power supply. Its plug did not properly fit the power receptacle on the computer. Once I got the proper power supply it worked like a champ. More like I remember the last time I played with an Atari 800 a few years ago. Then, I was amazed at how easy it was to get up and running with a disk-based Atari 800. Everything is total plug and play (but for real). I now like the Atari 800 :) The TRS-80 M3 was a LOT of work but I finally got it running. It turns out the problem with most of the units I tested most likely was a bad keyboard or just my ignorance in not knowing how to boot it into BASIC ;) I finally found one that had a decent keyboard and would boot to BASIC if I held down the BREAK key upon boot-up or after a reset. I wanted to make one nice machine out of two that I had. I moved the good keyboard to the nicer one. The nicer one didn't have the serial port board, so I moved it from the yucky one to the nice one. No wonder RS wanted you to bring the machine in to the service center to get it upgraded. This is NOT an easy computer to work on. I had to unscrew everything to remove the motherboard to both take out the card on the one and install it on the other. Also, there is a power cable that is added for the serial port option when it's upgraded, so I had to cut the zip ties holding the cable in place on the old one to move it to the new one. What a shit design. The stuck brightness and contrast knobs were fixed with a healthy helping of Deoxit, which is this deoxidizing agent. I worked the knobs back and forth and they loosened up nicely. Now everything works great. I now like the TRS-80 Model III :) The Commodore 64 I have is just plum dead. Or at least it seems to be. The video cable I am using has four connectors on it: red, yellow, white and black. The 1702 monitor has three jacks on the back: chroma, luma and audio. I tried all different combinations trying to get video on the display but no die. What's the deal with that? I think I'm using the wrong video cable, but all the C64 stashes I check turn up this 4-connector cable. I forgot to bring home the spare C64's I was going to have as stand-by's so I don't currently have another C64 to compare with. I know I have a three-connector cable that I'm sure goes to the C64 but I cannot find one for the life of me. Grrr. I still hate the C64. The Radio Shack Color Computer 2 is confusing. And somewhat lame. I have to go find the disk controller carthridge to attach disk drives to it. Then I have to find the proper disk drives. Fine. But I can't figure out the video. I want to connect it to an Amdek color monitor. The only video jack is the RCA type on the back that seems to be a built in RF modulator. So needless to say I don't get video on the display. I can't find any mention on the web of adding an external monitor to the CoCo. The CoCo2 is lame. I do not like the CoCo2. Any idea on how to hook the CoCo2 to a composite monitor? 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 *

23 years, 9 months

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Stuff available in UK

by pete＠dunnington.u-net.com

It's that time again -- time to clear a little space. Here are a few things I need to get rid of, some are things that I part with only reluctantly because I've had them a while, some are things that have been replaced with "better". All have to go *soon*. PDP-11/23 in a BA11-N box (upgraded to Q22, so equivalent to BA11-S) with 11/23 processor, memory, serial lines, etc. This was the first PDP-11 I ever had, but it has to go to make room for an even more interesting one. Free to a good home: Dual 8" double-sided floppies in a 3U-high rackmount case with 240V power supply. 50-pin SA850-type interface. Very nice unit made by Baydel (of RAID fame). I might also have a Q-bus floppy controller to go with this; it was once used with the 11/23 above. PDP-11/24 system chassis (also 3U high) and boards, including CPU and KT-24 Unibus map, maybe some others. Trust 9600 SP+ A4 colour scanner and SCSI interface card, with documentation and floppies. Works well under windows, not quite so well under Linux/SANE. I might also have a DEC TS11 and TS03 tape unit going spare. A few assorted DEC (and other) bits available to anyone who collects any of the above. Lastly, my much-loved Star LaserPrinter 8. This is a laser printer based on a Canon SX engine, like an HP LaserJet II. Originally with 1MB of memory, upgraded to 2MB, so it can handle a whole page of graphics plus some extra fonts/forms. Parallel and serial interfaces. In very good clean condition, it's had about 26000 pages through it from new (I bought it around 1988). I'd like to get (a small amount of) money for this. I would consider trading any of the above for a Unibus disk controller, a Viking QTD controller, or a TU56 ;-) -- Pete Peter Turnbull Network Manager University of York

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by dwightk.elvey＠amd.com

>From: "Chad Fernandez" <fernande(a)internet1.net> > >William Donzelli wrote: >> You can not reuse needles, nor can you sharpen them. With the >> acoustic-era machines, needles are used exactly *once*. Play the record, >> then pitch the needle. If you reuse needles, you will wreck the records. >> >> Needles are very available from several sources. They are quite >> inexpensive (they have to be!). >> >> William Donzelli >> aw288(a)osfn.org > >Wow, that is something I didn't know. I have zero knowledge on acoustic >era anything :-) > >That would be a pain. > >Chad Fernandez >Michigan, USA Hi The original Edisons all used diamond needles and could get thousands of plays. Many of the acoustic setups used cactus needles and one could sharpen them with a twizzle thing that had sand-paper to sharpen them. Dwight

23 years, 9 months

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OT/Old Recordings/Shameless Plug

by healyzh＠aracnet.com

> >My current archival project involves shifting Laserdisc's to DVD-R. I'm > >embarrassed to admit that I've resorted to using a system running Windows > >XP. > > Why XP instead of 2000? My Tivo -> SVCD projects went 15-20% slower on XP > vs. 2K, so I dropped back. I *despised* that damnable kandy-koted GUI crap, > too... As much as I despise Microsoft products I've found that I can almost stomach Windows XP Pro unlike any previous version of Window or Window NT since Windows 3.11. Plus it has some features that I like. Since I don't have a dedicated system for this, XP is the best choice. If in the future I do go with a dedicated system I'll put NT2k Pro on it, as I've already got a legal copy I can use for that. Actually considering it can take 40 hours to encode a disk using the options I'm using, a dedicated system is starting to make sense. "^) > My results are better than VHS, as I've never seen SVHS in action, I can't > say about that... not quite as good as DVD. But... hey... whaddya want for > $0.20 per disc??? :-) http://tivo.30below.com/zmerch/ -- for my methods; > maybe you'll find a nugget of info there to help you out? I'll have to take a look at it. I've been looking at using VCD for shifting VHS and TV. I've run into a really wierd problem though. The audio on my AVI capture (I use a Canopus ADVR-100 hooked to a firewire port) sounds fine, but when I encoded it to MPEG1 (VCD spec'd), it has a high pitched whine. I don't get the whine if I encode it as MPEG2 for DVD. So far I've only experimented briefly with this using a TV signal as the VCR in the computer room is an old ~1990 GE model with Mono audio and I'm using fairly cheasy cables to hook it up to the ADVR-100. I'm wondering if that might not be part of my problem. As on the AVI or MPEG2 file I think I can hear a 60Hz hum. I'm going to look into getting a decent VCR for the computer room in the very near future and experiment more. Zane

23 years, 9 months

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OT/Old Recordings/Shameless Plug

by jpl15＠panix.com

I have offered audio restoration services for many years, from any (and all) types of recorded audio media - cylinders, wire, tape: paper, plastic, sprocketed, 2MM to 4"... etc etc. I restore damaged media and do forensic work. That being said, if any list members have a few bits of recorded stuff lying about that you'd like cleaned up and transfered to a CD, contact me off-list. Obviously for big and/or complex jobs we'd need to discuss a fee structure, but for the occasional disc, old tape, or spool of wire that can be rolled into ProTools and dumped to a disc... why not? I imagine that this would extend to data cassettes with FSK or other audio-freq modulation schemes, so it's not *that* badly off-topic. :) Cheers John

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by Robert_Feldman＠jdedwards.com

Tried RadioShack? -----Original Message----- From: Russ Blakeman [mailto:rhb57@vol.com] Sent: Wednesday, September 04, 2002 2:07 PM To: cctalk(a)classiccmp.org Subject: RE: OT: dumpster dive and water/mold cleanup If y ou come across a vendor that also sells new stylus units for the tone arms of turntables you might post that too - my long term source dried up last year <snip>

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>Antique electronic supply has some. www.tubesandmore.com >They are good for 12 plays each. Package of 25 for $1.95 Thanks, I'll check them out. -chris <http://www.mythtech.net>

23 years, 9 months

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FA: CompatiCard IV, old Pop Electronics with 2650 SBC, S-100 SpeechLab, SOL Access & more

by rigdonj＠cfl.rr.com

Still cleaning up around here! See <http://cgi6.ebay.com/aw-cgi/eBayISAPI.dll?ViewSellersOtherItems&userid=rigd…> Joe

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>You can not reuse needles, nor can you sharpen them. With the >acoustic-era machines, needles are used exactly *once*. Play the record, >then pitch the needle. If you reuse needles, you will wreck the records. Glad to know that. I have reused them before, but never more than two or three total playings (they go visibly dull VERY quickly, and unless they look nice and sharp, I didn't dare use them). >Needles are very available from several sources. They are quite >inexpensive (they have to be!). Humm... I've never been able to track them down. But then again, last time I really looked, was pre-internet for me (pre 94/95), so I'll have to do a search now that I have the power of things like Sherlock and Google at my disposal. -chris <http://www.mythtech.net>

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cctalk digest, Vol 1 #157 - 46 msgs

by gstreet＠indy.net

Hello All, Back on June 9th of this year (Classic Tech Eletter #11), someone thoughtfully posted the paragraph at the bottom of this message (on this newsgroup). Coincidentally, I had already found the same S-100 computer and I eventually ended up winning the bid (I was the only bidder). I only very recently received this machine (it was slightly damaged in shipping, and it _really_ was filthy! (There was an enormous delay in shipping it to me.) I've got the damage straightened out and I completely disassembled it for cleaning. I just got it back together last night and turned on the switch. I seems to power up and the led's come on (led near the on/off switch and 3 led's on the backplane/motherboard). I talked to one person who said that he thought that he'd had an ISC computer before, but that it wasn't pure S-100. The reason that I bought this machine is that I have some Seattle Computer Products S-100 cards that I really want to get running. They drop in the ISC "S-100" computer _perfectly_, but I have not powered it up with the SCP cards in place. If there's something that's not "pure S-100" about the ISC, I don't want to damage the SCP cards. I just checked the link (below) and it still works. I think the link will disappear in just a few more days (90 days), so I can provide the same pictures to anyone interested after the link disappears. The reason it's taken so long to ask this question is because it took over 2 months for me to actually receive the unit (now the darned link is ready to vanish, probably on Sept 10th). http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2029719366 I cannot find _any_ information about ISC Systems Corp., Spokane, WA. It's an absolutely beautifully crafted unit and from the filthy condition that I received it in--it appears to have been left running for, perhaps, _years_! The seller claimed that he'd removed the existing cards to install in his Altair, but if that's true, someone must have already substituted different cards--in the pictures, you'll notice a bunch of twisted pair and other small gauge wires: these all appear to hook up to what would seem to be "non-standard" S-100 cards, through proprietary connectors. I cannot fathom how the original ISC cards could have been of any use to anyone except a user of this ISC system. It appears that the "non-standard" wires go to things like: keyboard, monitor, a network and LP 1 and LP 2 (LPT 1 & LPT 2??). There is yet another connector that I've no clue as to what it might do. _BUT_, _if_ the box itself conforms to the S-100 standard, and if I can use the SCP cards, all the other wires don't matter, because they won't be connected to anything. I've really taken a liking to this machine--I hope I can use it! Any help would be much appreciated! Thank you, Robert Greenstreet gstreet(a)indy.net > >At 08:33 PM 6/9/02 -0400, you wrote: >CLASSIC TECH ELETTER, Vol. 1, Issue 11 > >It's too bad the seller gutted this ISC Systems S-100 computer. If it >sells close to the opening bid, however, the buyer will get a good deal on >an S-100 starter system. (The seller's right about the system needing a >cleaning. You could knit a sweater with all the lint stuck in the fan >vent.) http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2029719366

23 years, 9 months

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Archival storage (was RE: OT: dumpster dive and water/mold cleanu p)

by Robert_Feldman＠jdedwards.com

Look for companies that sell conservation (as in museum storage) supplies. Some that I know of are Gaylord Brothers, Light Impressions, and Hollinger Corp. They sell acid free (buffered) and inert materials for storing documents, photos, textiles, etc. You might also go to a building supply company and get a roll or Tyvek building wrap and make your own sleeves. More or less the same stuff used for 51/4 inch floppy disk sleeves. Only problem might be you would need to use an archival glue or tape to hold the sleeves together. -----Original Message----- From: Tothwolf [mailto:tothwolf@concentric.net] Sent: Wednesday, September 04, 2002 1:57 AM To: cctalk(a)classiccmp.org Subject: RE: OT: dumpster dive and water/mold cleanup On Wed, 4 Sep 2002, Russ Blakeman wrote: > I've made sleeve from the vinyl you can buy in rolls from Walmart for > putting over leaky windows - it's pliable and thinck and similar to the > vinyl that our "forefathers" (and foremothers) used to cover their > furniture with, but thinner. Fold it and then heat seal the top and > bottom edges. I've seen forsted vinyl sleeves lik that in years past > that came with an odd sized box that they could be stored in, sort of an > archival manner of storage. I'd be worried about the PH of such material. Highly acidic (or even highly alkaline) materials are the enemy of items you wish to preserve. -Toth

23 years, 9 months

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TI Silent 700's: Update

by doc＠mdrconsult.com

OK. A little looking around has revealed that I have a Model 707 (not the 707/1200, darn it!) and a model 745. I also found out this evening that $friend forgot to give me the shopping bag full of thermal paper.... I've found a lot of links to pages that mention there, but no real documentation. Oh, and one company that will sell a manual for the 745 for $30 plus S&H. Does anyone know where I might find real information? Considering the source, I have every hope that they are fully functional. Doc

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>A reality show? Do you mean non-fantasy? yes, sorry, bad wording on my part. -chris <http://www.mythtech.net>

23 years, 9 months

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Semi-OT CP/M question/ feasibility

by archer＠topnow.com

I figure anything CP/M is on-topic, but the hardware I'm talking about would be brand new. :) Are there working examples of CP/M running with just a serial terminal connection and a drive+interface for the sum total I/O? I'm assuming this has been done many times and in theory would be nothing too offbeat? If this exists, it might be useful to study the BIOS to see what's being done there, or perhaps just buy the board and CP/M if by chance something's out there already. Are you giving up anything important with a terminal-based CP/M system vs. one with integral monitor and keyboard -- in other words, cursor positioning and such in applications being less flexible? I'm assuming the answer is "no", no difference because of the way CP/M BDOS calls all go through BIOS? Or is this a "in theory X in practice Y" thing? The reason I'm asking is I've FINALLY -- after about two months of struggle with hardware and coding -- succeeded in getting my IDE interface working. Although it's currently mated to a 6502 board and a 60GB HDD, since it's based on an 82C55, could just as easily be coded to work with a Z80/Z180 system. Okay, I know that porting a BIOS to a new board would be massively non-trivial. I've got a good book "Programmer's Guide to Using and Modifying CP/M" (IIRC) which makes it clear it would be a fairly good prospect to take months to finish, even with good debugging practices. (Although I'm no stranger to coding moderate-sized assembly programs.) On the other hand, I'd motivated by having an SBC that could run any of a number of C, Pascal, Modula 2 or Fortran compilers, along with BASIC, decent editing tools (well, I cut my teeth on PC-DOS Wordstar!), would make such an SBC really quite nifty as a hacking toy. Comments? I'm thinking of using a GAL decoder to map 32Kx8 of "shadow" EEPROM to MEMRDs and the "shadow" RAM to the same address for MEMWRs upon RESET, then copy the "shadow" ROM to RAM on coldboot, and then write to an I/O port to cause the GAL to map only the 128Kx8 SRAM into the machine memory map and jump to 0 to bootstrap up. Not sure if BIOS could use the upper 64K bank for storage in a useful way like disk I/O buffering, but since 128Kx8 SRAMs are cheap and small, and I've got a tubefull, that's what I'd want to use. :) P.S.: I got the 360K floppy to work under Win98, but not XP. I suspect it's just an undocumented "feature" of XP. :)

23 years, 9 months

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Intersil Intercept Jr (was Re: Blowing Up Old Computers( early laptops))

by healyzh＠aracnet.com

You might want to check out the following project if you want to build your own small PDP-8. David Conroy has implemented a PDP-8i in an FPGA. http://surfin.spies.com/~dgc/pdp8x/ I might have some info on the 6100, I'll have to try and remember. I've got databooks from them and I believe Harris that list it. Zane > > I think it used unobtainium type RAM and ROM, being > all early Intersil CMOS, so it might be very difficult > to make an "authentic" one today even if you had a > 6100. The 6100 was, given my limited knowledge, harder > to make truly PDP8/e compatible than the later 6120. > I've looked around for a ROM listing or front panel > code for the 6100/Intercept with no luck. > > > > > --- "Peter C. Wallace" <pcw(a)mesanet.com> wrote: > > On Tue, 3 Sep 2002, Ethan Dicks wrote: > > > > > > > > --- Mike <dogas(a)bellsouth.net> wrote: > > > > > > > > I just had to nominate the Intersil Intercept > > Jr. to the early laptop > > > > catagory, Runs on batteries, fits in a lap. > > > > > > > > ;) - Mike: dogas(a)bellsouth.net > > > > > > Are there plans out there anywhere? I doubt I'll > > ever run across > > > a real one. They looked kinda cool back when I > > was a kid, but at > > > the time, I didn't understand what it meant to be > > PDP-8-instruction- > > > set compatible (i.e., the implications of it, not > > the literal sense > > > of "compatible"). > > > > > > It had, IIRC, some toggle switches, LEDs, and 4KW > > of SRAM, right? > > > > > > -ethan > > > > The intercept had those, the Intercept Jr only had a > > keypad and numeric LED > > display. It only 256 or 1K (12 bit) words of RAM > > ISTR > > > > > > > > > > > > > > > > > > > > > > > > > __________________________________________________ > > > Do You Yahoo!? > > > Yahoo! Finance - Get real-time stock quotes > > > http://finance.yahoo.com > > > > > > > Peter Wallace > > > > > __________________________________________________ > Do You Yahoo!? > Yahoo! Finance - Get real-time stock quotes > http://finance.yahoo.com >

23 years, 9 months

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Intersil Intercept Jr

by mranalog＠attbi.com

Loboyko Steve wrote: > I think it used unobtainium type RAM and ROM, being > all early Intersil CMOS, so it might be very difficult > to make an "authentic" one today even if you had a > 6100. On mine, the motherboard uses a IM6312 for the "microinterpreter" (dated mid 1977). And I assume that the three IM6561s are ram chips (dated early 1978). The rest consists of: 1 - IM6100 2 - CD4511 1 - CD4042 1 - F4075 2 - 74C74 1 - F40175 1 - CD4025 2 - F40098 1 - 74C42 1 - CD4069 1 - CD4011 1 - F4001 1 - 1K Beckman DIP Resistor pak 1 - 10K Beckman DIP Resistor pak 8 - FND 367 7 segment red LED displays 1 - 2.4576 MHz crystal 1 - 12 key keypad 4 - 2N2222 transistors 3 - 44 pin circuit edge connectors 1 - battery holder to hold 4 D cell batteries in series and a few resistors, diodes, capactors and a switch Now the "6951c-M1KX12" plug-in battery-backuped ram board has 12 IM6518s. > I've looked around for a ROM listing or front panel > code for the 6100/Intercept with no luck. Somewhere here I have the users manual and I am almost certain that there is a listing of the microinterpreter in the manual. Regards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://dcoward.best.vwh.net/analog Analogrechner, calculateur analogique, calcolatore analogico, analoogrekenaar, komputer analogowy, analog bilgisayar, kampiutere ghiyasi, analoge computer. =========================================

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>Home recorded?? I didn't know that was possible! The only time I ever actually saw a record recorder was on an episode of the Honeymooners. Ralph recorded a message for Alice on his record player. He made a comment about needing a blank record, and then spoke into what looked like a mini horn speaker. I assumed that since the Honeymooners was a "reality" show, that the device actually existed (and since I have heard reference to such a thing elsewhere). Anyone know what material the blank records used? I would think ceramic would be too hard, and even vinyl records seem like the material would be too stiff to get a good recording. -chris <http://www.mythtech.net>

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>I've never heard of ceramic records. Is this different than the old >bakelite reocrds? Don't know. I'm not a record expert, so maybe they aren't ceramic. I was told that was the material, and I know they are a hard, brittle, fragile glass or clay like substance (from the one that I broke). These are 1910-1920 era records (based on the fact that they carry the Victrola name, and IIRC, my Victrola has a 1913 date on the back) -chris <http://www.mythtech.net>

23 years, 9 months

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some observations

by ghldbrd＠ccp.com

It has been some time since the OT rants took up the majority of e-mails, and now we get the spammers in the list . . . . I've noticed that I get upwards of 100 e-mails a day from you guys. Much of it gets disposed of if I have no interest, but on occasion I pick up some nice tidbits of information for future reference. What I've seen is multiple listings from the same person, who writes and sends, writes and sends, a sentence or two at a time. Sometimes I think one would be better off if one just sat back and composed a single post with all the details in one fell swoop. I'm sorry if this may have offended someone; it was not intended to. Just some biased observations and a suggestion to help cut down on some of the unneeded traffic. You all have a wonderful treasure of knowlege out there, just make the nuggets a bit bigger . . . please???? Gary Hildebrand St. Joseph, MO

23 years, 9 months

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OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>Are you thinking of 45s? I've never heard of storing fragile 78s in wire >racks... I have some ceramic 78's stored in wire racks. They go to my Victrola. I confiscated them that way from my father (when I repaired the Victrola many years ago), but I remember growing up they were always stored that way in the basement. I can't say however if my father put them that way, or if he got them that way from my grandmother when he confiscated the Victrola from her (with intention of repairing it, but he didn't, instead it sat in the foyer for 15 years before I decided to see if I could get it going). I haven't dared change their storage method simply because I am afraid of breaking them, and I figure if they have made it about 30 years this way, they should be able to make it another 30. -chris <http://www.mythtech.net>

23 years, 9 months

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