test-drb August 2005

test-drb@ccmp.vtda.org

227 participants
528 discussions

by leeedavison＠yahoo.co.uk

>> While this is an RO200 series I don't know which one. > Do you know if it's an 200E-series drive or a plain old 200 > series? It seems to be a plain old 200 series, at least the label says RO 200 series and not RO 200E series. No model number anywhere though. > Capacity seems to be dictated by number of heads (which you > can count with the lid off!) Curses! I didn't count and I don't want to open it up again unless I have to. I do remember that it is 'full' of platters though, and there is an arm to each surface. It's the first time I've seen a full height drive without room for an extra platter or two. Cheers, Lee. . ___________________________________________________________ To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com

18 years, 11 months

Rodime RO200 series

by leeedavison＠yahoo.co.uk

I've recently acquired a TORCH-725 which has this RO200 series hard drive in it, trouble is when I took everything out of the TORCH case for first inspection I heard something 'ting' off one of the platters in the drive. Opening it up to have a look, well a little dust can't be as bad as debris that goes 'ting', I found a 12mm long 2.7mm dia. roll pin lying in one corner. Anyone have a clue where this may have come from? Dare I power the drive without it? This may eventually be the only option if I can't re-install the pin. While this is an RO200 series I don't know which one. The series seems to run from 5MB to 40MB and I'd like to know which one this is likely to be. Assuming this drive needs to be replaced can I use a 40MB SCSI drive on the Torch SCSI board and bypass the SCSI to ST506 interface? This would be the prefered eventual solution as I have a few 20MB to 200MB SCSI drives I could use. Cheers, Lee. . ___________________________________________________________ To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com

18 years, 11 months

WANTED: Atari ST software

by tosteve＠yahoo.com

Hello, Does anyone have any Atari ST disks that you can send me? I have a 520ST, but I don't have a single diskette for it. Thanks! Steve in Southern California. ____________________________________________________ Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs

18 years, 11 months

PDP-11 Diagnostic Handbook

by wacarder＠earthlink.net

>> On Saturday 13 August 2005 19:38, Al Kossow wrote: >> If you use XXDP, you want a copy of this. >> >> http://www.bitsavers.org/pdf/dec/pdp11/xxdp/ >> PDP11_DiagnosticHandbook_1988.pdf > > Al, > > What a great manual!!! This will save hours of rummaging through XXDP > listings to find switch settings! > > Thanks, > Lyle Ditto what Lyle said. This manual has everything spelled out. I won't have to scratch my head any more trying to figure out how to run the XXDP diagnostics with a blindfold on. Thanks Al !!! Ashley

18 years, 11 months

Anyone care to guess what this is? Is it a computer even?

by jwest＠classiccmp.org

I mentioned this on the list a long time ago - found it at a salvage place. I wasn't in any rush to get pictures, but last time I was there they said the place was going to be declared off-limits for humans. So I got a few pictures of this olive drab "computer". Anyone have any clue what this thing is? Just curious!? If anyone wants it I could put them in touch with the salvage place owner. Pictures are at www.ezwind.net/jwest/whatsit Jay West

18 years, 11 months

drive repair tips?

by msokolov＠ivan.Harhan.ORG

der Mouse <mouse at rodents.montreal.qc.ca> wrote: > Sending a FORMAT UNIT command isn't enough? It's *supposed* to do a true LLF on a Classic HDD, but I very strongly suspect (close to certainty) that on modern drives it's a dummy, something like "write zeros to all logical blocks" as if by ordinary writes. They probably have stuff like embedded servo (a la RL02) and cannot be LLFed "from scratch", i.e., from a totally degaussed or misaligned state. MS

18 years, 11 months

drive repair tips?

by mouse＠Rodents.Montreal.QC.CA

I have a disk drive - a (relatively) modern sealed unit - which appears to have mechanical trouble. The noise it makes spinning up says to my ear "bearing friction". I'm considering taking it apart and lubing the bearing. Of course, this would at best be a temporary fix, since it is on its way out at this point; this is more to gain experience on a throwaway device than to actually recover the drive. (All the bits from it are safe; live mirroring is great for that.) Any tips from the collective wisdom? Obviously, I want to do this in as close to a cleanroom as I can reasonably find, and have the platter assembly open as short a time as I can. But I don't, for example, have any idea what would be a suitable lubricant to use - assuming the bearing isn't a totally sealed assembly itself.... ObOTness thread: the disk itself may be formally on-topic; it's certainly close to - it is stamped "MAR 31 1996". /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse at rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B

18 years, 11 months

PDP11 stuff in OZ

by wacarder＠earthlink.net

> -----Original Message----- > From: Al Kossow <aek at bitsavers.org> > Sent: Aug 17, 2005 12:30 AM > To: classiccmp at classiccmp.org > Subject: PDP11 stuff in OZ > > If someone is nearby.. > > http://www.psych.usyd.edu.au/pdp-11/equip_list.html If anyone is in Australia and is willing to collect and ship some items to the USA for me, I will be glad to pay you for your time and effort. I have attempted to contact the owner of these items but have not received a response. I would very much like to have the spare 11/40 CPU set since I have both a functional 11/40 and 11/35, as well as a sick 11/35. My 11/40 is part of a historic functional display of a 1970s timesharing academic computer center and I would like to be able to have spares to keep it up and running. If anyone in Australia is willing to help, please contact me off-list at wacarder at usit.net. Thanks, Ashley

18 years, 11 months

LGP-21

by cc＠corti-net.de

I've scanned some documents for the LGP-21 (peripheral options, diagnostic programs etc.) and put them on our ftp server: ftp.informatik.uni-stuttgart.de/pub/cm/lgp21/docs There's a readme file in each directory. Christian

18 years, 11 months

Bit Banger was Analog modem emulator?

by swtpc6800＠comcast.net

An early example of a bit banger serial interface was the Motorola 6800 MIKBUG Monitor ROM. It used a parallel interface chip (MC6820 PIA) as a bidirectional serial interface. It would work at 110 and 300 baud (some people clocked it at 1200 baud.) This was the used in original (1975) Southwest Technical Products 6800 computer. Motorola had a real UART (MC6850 ACIA) at the time so I don't know why Motorola did this. SWTPC later switched the their own Monitor ROM and a MC6850 serial port. http://www.swtpc.com/mholley/swtpc_6800.htm Michael Holley

18 years, 11 months

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test-drb August 2005