test-drb June 2004

test-drb@ccmp.vtda.org

281 participants
616 discussions

Brian Instruments BRIKON model 723 floppy drive tester/analyzer

by kennj＠telusplanet.net

I finally got around to fixing a Brian Instruments BRIKON model 723 floppy drive tester/analyzer I purchased (broken) some time ago. It was a pretty easy problem in the power supply (two shorted capacitors). It now powers up, lights blink, and I don't know how to use it :-) Inside the unit the EPROM stickers say "P723 Apple Dual Analog 4/29/92", so I assume that means this puppy can test Apple analog drives. Just for fun I tried plugging in an old 5.24 inch IBM-PC drive, and after moving the drive select (DS) jumper on the drive to "1", I can step the head back and forth using buttons on the front of the Brian. Ohh I'm a clever monkey! There's a lot I don't know about floppy drives, and I don't understand most of the info the unit presents on it's front panel or display. What's "Radial Select" mean? Or "Binary Select?" Or "Mux Control," for that matter? What does the following pattern mean when displayed following completion of a test cycle? --. | | | Looks like a seven, but there's an extra segment lit up! BTW, the 723 reported that my old floppy drive failed the test, which is quite possible. I was willing to sacrifice that drive in the interests of my education. :-) I would really like to get my hands on a manual for the unit. My search in Google took me to this web site, where someone way back in 2002 was looking for a BRIKON 723 with the analog/alignment attachment (option R). I don't know if that's the same as the Apple Dual Analog feature my 723 has. There's nothing on the back of my unit that says "option R" has been installed. My unit has one "free" slot inside. I guess that's for an option I don't have. Could anyone out there provide me with a copy of the owner's manual? Of course I'll pay for photocopy charges, etc. Alternately, anyone out there interested in outlining how to use this puppy? Thanks so much, Kenn

20 years, 1 month

1802 - elf?

by ron.hudson＠sbcglobal.net

How rare are elfs? How about 1802s, could I build my own?

20 years, 1 month

IS32 Optic RAM Datasheet and Steve Ciarcia's Micro D-CAM Artical

by dave04a＠dunfield.com

I have posted the following to my web site: http://www.dunfield.com/pub/is32.pdf <- IS32 Optic Ram datasheet http://www.dunfield.com/pub/mdcam1.pdf <- Byte "Micro D-Cam" artical part-1 http://www.dunfield.com/pub/mdcam2.pdf <= Byte "Micro D-Cam" artical part-2 I have not yet scanned the Apple code listing that accompanied part two of the byte artical - will try and do this in the next few days (it's fairly lengthy). I won't be able to leave these here forever - if anyone can take them and put them somewhere for long-term availability, that would be great! Btw, you can't access the pub directory directly, so you will have to point your browser at the specific files indicated. Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector. http://www.parse.com/~ddunfield/museum/index.html

20 years, 1 month

Unisys System 80 available in Germany near Osnabrueck !

by cheri-post＠web.de

Hi all ! Who's interested in big old iron ? For the next 3 or 4 weeks, a hole Unisys mainframe will be available. The System 80 comes with several hard disks, a DCP-rack (with this thing, you can talk to VAXen), a high speed plotter and four big nine-track reel tape drives ! There are lots of terminals going with it. I defintely haven't enough space for it, you will need a truck to load this huge baby ! The mainframe will be scrapped in several weeks and it's apparently the last one in working condition in Europe (I don't know if it's right but the administrator told me so). I'll get several parts out of one reel tape drive and two HDDs, that's all. Contact me offline if you are interested. I can get more information about the model numbers of the parts. Cheers Pierre PS: I could make some photos, before it goes to the scrapper if nobody wants it. ________________________________________________________________ Verschicken Sie romantische, coole und witzige Bilder per SMS! Jetzt neu bei WEB.DE FreeMail: http://freemail.web.de/?mc=021193

20 years, 1 month

Pdp-11/60 and HP 9836 available in Houston

by nospam212-classiccmp＠yahoo.com

I have a PDP-11/60 available in Houston TX along with an HP 9836. If interested contact me off list. Looking to see if anyone is interested in them whole before parting it out. Seems most people just want bits and pieces. David ----- "When the mind is free of any thought or judgement, then and only then can we know things as they are." David Williams dlwfanservice(a)sbcglobal.com

20 years, 1 month

selectric consoles

by brian＠quarterbyte.com

I have one of those IO selectrics from eBay too. It looks like they were pulled >from service, are nicely cleaned and lubricated but not repaired (e.g. mine has one shorted solenoid). Have gotten most of the wiring figured out, will send the documentation to any interested party -- contact me off-list. Later this summer I'll be building an interface for it, probably with usb, maybe serial also. Brian =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _| _| _| Brian Knittel _| _| _| Quarterbyte Systems, Inc. _| _| _| Tel: 1-510-559-7930 _| _| _| Fax: 1-510-525-6889 _| _| _| Email: brian(a)quarterbyte.com _| _| _| http://www.quarterbyte.com

20 years, 1 month

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test-drb June 2004