test-drb

test-drb@ccmp.vtda.org

101090 discussions

by wh.sudbrink＠verizon.net

In case anyone on the list won this ebay auction: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=360303684042&ssPageName=… and doesn't know what that little thin rectangular board with the caps, resistors and coax on it is, it is an original Software Tech Music System board. The docs and software for it are on Jim Battle's Sol website. Not much to it electronically, but I really wanted an original. Rats!

15 years, 6 months

$6000 for an Altair 8800b with drives, terminals and DEC printer

by christian_liendo＠yahoo.com

I just posted a link about this to my blog. http://8bitaficionado.com/?p=378 The direct sale is here http://cgi.ebay.com/ALTAIR-8800B-MITS-COMPUTER-W-DISK-DRIVE-COMPLETE-8800-/… I guess if I could burn $6000.00 I would get it.

15 years, 6 months

Adaptec AIC-010 / AIC-100 ECC scheme

by classiccmp＠philpem.me.uk

Hi guys, I've managed to get my grubby paws on a Seagate ST22R RLL controller, and a matching ST-277R-1 hard drive (half-height 5.25in, 60MB ish). As part of my "pre-installation research", I Googled the part number of the one apparently-non-Seagate-custom part on the ST22R -- an Adaptec AIC-010 RLL controller. Turns out the datasheet for this part is on Bitsavers too. The datasheet provides a decent overview of the on-disc format (specifically: it's a tweaked variant of the IBM floppy disc low-level format, sitting on top of (2,7)RLL). What it doesn't really cover is the 32-bit error-correction code and its polynomial. There is a slightly oblique reference to Fire codes, there are two polynomials (forward and reverse), and data is loaded in shift-register style. Does anyone know what sort of error-correction codes were used on the AIC-010 and AIC-100 controller chips, or the polynomials used? Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/

15 years, 6 months

Another 935 shot...

by mdavidson1963＠gmail.com

On Thu, Sep 30, 2010 at 10:37 PM, Zane H. Healy <healyzh at aracnet.com> wrote: > At 9:44 PM -0700 9/30/10, Mark Davidson wrote: >> >> Ok, can't resist. ?I'm just so happy to have this machine! > > I don't blame you, I'm not into HP systems, but that's a seriously cool > sounding system. ?I'd love to try MPE. I have a special spot in my heart for HP3000 systems. MPE is a seriously cool OS, and I attended UTC, home of the HP3000 mailing list. My mother also worked at the university for 20+ years. I grew up spending summers on the campus, in the library and in their computer center, using their 3000 (and their 1000). Mark

15 years, 6 months

Apple II Killer App

by mardy＠voysys.com

So now that I know that my recently restored Apple II is going to turn into dust in the not too distant future, how can It best be demonstrated to illustrate why it was so awesome back in '78? For example, with an Altair, you can either load Billy's Micro Soft Basic or play "Fool on the Hill" through your AM radio. But what application do you run on an Apple II that epitomizes Steve and The Woz's gift to man kind? -Mardy

15 years, 6 months

OT: Worth exhibiting at Maker Faire?

by evan＠snarc.net

Hi all -- My club (MARCH) is scheduled to exhibit at the inaugural Maker Faire NYC. I'm starting to have second thoughts because we don't "make" anything, we just make old things work again. Who here has been to a Maker Faire event, and if so, would a vintage computers exhibit be well received by the audience?

15 years, 6 months

Evolution of the Apple Mouse

by marvin＠west.net

> Try pricing a big-ass hunk of extruded heatsink some day. > > -- > Will I'm sure this somehow relates to the Apple Mouse, but it will need to be explained to me so I can understand. I just sold 30# of aluminum heatsink approx 8" wide x 4" high x 5' long for $40.00. 9 other identical pieces were scrapped out for about $15.00 each. My understanding is that they were in the $100.00 + catagory when new. Marvin

15 years, 6 months

SPSS for Windows

by charlesmorris800＠centurytel.net

I'm cleaning out the closet and found my V6.1 SPSS for Windows (24 Jan 1995) on eight 3.5" floppy disks "Graduate Pack for student home use only", purchased in 1996. Anyone want it for $5 plus postage from zip 65775?

15 years, 6 months

Ok, gotta show this...

by mdavidson1963＠gmail.com

My latest acquisition (thank you, Stan!). An HP 3000/935 with several drives (all working). Photo links below. http://www.facebook.com/photo.php?pid=5152529&l=4dfb3c29ff&id=734972117 http://www.facebook.com/photo.php?pid=5152533&l=3e032379a3&id=734972117 I'm so thrilled! Mark

15 years, 6 months

Sharp IS501 OPIC

by ard＠p850ug1.demon.co.uk

I havea shaft encoder here in a classic (well, it's over 10 years old :-)) printer. And it seems to have failed in that I am getting no signal at all on either output line (they should be quadrature signals, of couse). They test as floating.. I've taken in apart (of course, what have I got to lose...) and the PCB cotnains a Sharp IS501 OPIC device along with a couple of resistors conencted to it, a supply decoupling capacitor and a limiting resistor for the IR LED. THe latter seems to be working (dropping about 1.5V). but no outputs. The IS501 is a 6 pin stagered-DIP transparent package. The 6 pins are +5V, gorund, the 2 outputs and the 2 (sensitivity?) resistors. So not much I can so other than replace the chip. A qucik web search turns up nothing useful (and no data sheets). Anyone ever come across anything like this before, knows a substitute, etc? -tony

15 years, 6 months

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