test-drb

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101090 discussions

by jfoust＠threedee.com

Hmm, a quick Hotbot search reveals a $250K real estate transaction in Aspen, CO to a Perry Pollock, and that name is listed as the "Foreign Shipping Coordinator" for an overpriced herb/vitamin scam at <http://www.putpeel.com/healthy/>. Think the couple in that picture are the same ones in the 1979 Byte picture at <http://www.brouhaha.com/~eric/retrocomputing/wps/byte197904-068.gif>? Hard to tell. :-) - John

27 years, 9 months

Audio Cassette formats

by jfoust＠threedee.com

Yes, there are/were many different formats for recording digital data on audio cassettes. Some used frequency, some used phase info, and some recorded to the tape using something other than conventional voice-style recording. Think of them as modems at speeds of 120 to 2400 baud. I've found a number of decoders that were developed for the emulator scene. Most are quite crude and unforgiving. I concluded that I wanted to store absolutely uncompressed digitized audio until I confirmed that any of today's various compression methods wouldn't obliterate the encoded data. Given the dozens of encoders and compression schemes out there, how do you know if a particular scheme won't wipe out the data by simplifying waveforms, fudging phase relationships, etc.? Storage is cheap. You don't need stereo. If the waveforms use audio in the range 1200 to 2400 Hz, for example, then Nyquist tells you to oversample by 2 to 8 times, meaning even 8 Khz, 8-bit might be overkill with roughly 8 K/sec storage, and 22 Khz sampling is certainly adequate. As someone pointed out earlier in the thread, being able to tweak the azimuth on the tape head makes all the difference with some tapes. - John

27 years, 9 months

Recent Finds & Thoughts

by Philip.Belben＠pgen.com

>> PS PET and many later C= machines have one more problem: they didn't use >> standard audio cassette machine, but one with a special Commie board in it >> and a custom interface. > > My knowledge of the PETs is limited. What would this setup do that would > inhibit recording to CD? Not so much inhibit, but make it less useable. I understood the idea as: instead of plugging your home computer into a tape deck, how about a CD player? Surely just the lead will be different? In which case, let's archive all those tapes at a dozen C10 tapes to a CD... With the PET and VIC families, it's not just a different lead, it's an (admittedly llittle) circuit... Philip.

27 years, 9 months

Audio Cassette formats; what about ADAM?

by allisonp＠world.std.com

< What about the ADAM computer from Coleco??? It uses a digital tape that < holds (around) 256K or so... (Never set mine up yet). < < Is there any way you could run that thang thru an audio player and have < PC routine re-digitalize it, or are you stuck with read a thing and < serial-send it over to another PC? No! It's digital saturation like a floppy and the encoding is to the flux reversal timing. Adam is digital stauration recording like a floppy only slower, audio tape is audio frequency/phase change and the medium is the linear portion of the BH curve. They are very different from each other. Allison

27 years, 9 months

ID these DEC floppy disks?

by emu＠ecubics.com

Hi Christian, ---------- > From: Christian Fandt <cfandt(a)netsync.net> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: ID these DEC floppy disks? > Date: Monday, November 30, 1998 8:03 AM > > At 23:18 11/28/98 +0000, you wrote: > >On Nov 28, 21:23, Pete Turnbull wrote: > Now I have got to hunt for a decent reader of .ps files which works under > windoze95 . . . Have a look at: http://www.cs.wisc.edu/~ghost/ I'm using gsview for years ... cheers, emanuel

27 years, 9 months

ID these DEC floppy disks?

by pete＠dunnington.u-net.com

On Nov 28, 21:23, Pete Turnbull wrote: > If I can find the source files, I'll put machine-readable notes on my web > pages (probablyt as PostScript). That is mostly XXDP V2 stuff. I *might* > have some machine-readble XXDP+ notes; if I can find any I put them up too. > I'll post a note to the list if and when... Well, that turned out to be easier to find than I expected. Anyone interested can take a look at http://www.dunnington.u-net.com/public/XXDP.ps which has notes relevant to both XXDP+ and XXDP Version 2. -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 9 months

VT102 info found.

by cfandt＠netsync.net

There are at least two of you folks I recall that are soliciting ClassicCmp-relavant URLs to put into your webpages (Sam's VCF site is one) for use as a reference resource. Here's one to add to your lists which is DEC-related that I literally stumbled onto. Other DEC folks here may need to bookmark this too: http://www.celigne.co.uk/terminal/ Naturally, during all my previous hours of searching for VT102 info from before I posted an inquiry last week, all the search engines I used could not see this page. This is the one that answers all my VT100/102 questions. An example of if we find a resource like this, please post it for others (don't forget I'm still looking for *any* HP250 and IBM 9370 info!! ;) ) Regards, Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.ggw.org/freenet/a/awa/

27 years, 9 months

ebay suggestion: auto-extended time limit

by CLASSICCMP＠trailing-edge.com

>I'm a disgruntled ebay bidder. >Why? Because I had an item picked off by a bargain hunter >in the last 10 seconds of the bidding. Why should you be disgruntled? The price went over what you wanted to pay for the item, didn't it? Tim.

27 years, 9 months

ebay suggestion: auto-extended time limit

by ss＠allegro.com

Hi, I'm a disgruntled ebay bidder. Why? Because I had an item picked off by a bargain hunter in the last 10 seconds of the bidding. I have a simple suggestion that would fix this...an easy-to-implement suggestion: The act of placing a bid should automatically extend the auction by 5 minutes. Thus, if the auction is supposed to end at 15:00, and I sneak in a bid at 14:59, the auction is automatically extended until 15:04. If someone else then bids at 15:02, the auction is extended until 15:07. If you like this idea, send a note to: suggest(a)ebay.com If you don't like the idea, you must not have bid on anything at ebay :) BTW, no...increasing my original bid isn't an acceptable solution, for a wide variety of reasons ... bargain hunting not included. thanks, Stan Sieler sieler(a)allegro.com

27 years, 9 months

Santa Ana ACP Store

by manney＠lrbcg.com

Hmm. Probably can't make the 26th, as I only go out there once every 5 years or so. Later in the week, perhaps? manney(a)lrbcg.com >PG Manney wrote: >> >> I'm gonna be in Orange County over Christmas. What's the address of that >> place? > >ACP is located on E. Edinger, and IIRC, it is located at 1310 E. Edinger in >Santa Ana. > >> btw, anyone in O.C. who wants to meet and talk about old computers? > >Unless something unexpected happens, both John and I will be at the TRW swap >meet on December 26th. It starts at 7:00 am and is over at 11:00 (no >transactions permitted after 11:30am.) Weather permitting, I usually go on >the transmitter hunt there starting about 11:45 or so, and then out to >brunch about 12:15 or so. Aaron joined us yesterday, and provided a good >chance to talk about the older computers! >

27 years, 9 months

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