test-drb March 2015

test-drb@ccmp.vtda.org

167 participants
224 discussions

by jules.richardson99＠gmail.com

Does anyone know how to remove the side skins on an SGI Origin (specifically a 2200 deskside cabinet). The manual mentions removal of the top and front, but says that the sides are more tricky and to contact SGI for the procedure. I'd like to remove them as there's some minor paint splatter on them, which would be much easier to deal with off the machine. I see there's a screw at the bottom of the machine on the rear edge (much like the one for the front which releases the front skin), but removing it doesn't seem to let the rear plastic molding drop in the same way, and I assume this needs to come off first. cheers Jules

9 years, 8 months

VAX 4000-300 Available in the UK

by robert.jarratt＠ntlworld.com

I have a VAX 4000-300 that I want to pass on as I don't have room for it. It is in a BA440 enclosure (marked VAX 4000-400). The CPU board had a couple of problems, the levers that are used to push it into the slot have been broken, however it will push into the slot OK and work. The onboard Ethernet (SGEC) is also not working, but I have included a DESQA so you can network it. It has 64MB of memory (2x 32MB). It also has a CXY08 board. It does not have any disks because I want to keep the few DSSI disks I have, however I will include two DSSI covers. You can still boot it as a satellite of course. In fact I was toying with the idea of putting a Raspberry Pi inside the enclosure with a crossover LAN cable and running if off SIMH on that. It is free, however I would appreciate a small donation, as it has cost me money to collect it to save it from being dumped. It is in the UK, in South Manchester. Although I am currently working a lot in Coventry so could bring it to that area. I will also be at DEC Legacy in Windermere 11-12 April, although I would prefer to leave room in my car for the machines I want to exhibit, if possible. Regards Rob

9 years, 8 months

More random identifying

by kylevowen＠gmail.com

More computer-esque things looking to be identified. Some of it military, some of it not. What might the paper tape reader have come out of? The big circuit boards say "Harris" on them. http://imgur.com/a/S7dyo Thanks, Kyle

9 years, 8 months

RL02K Pack Reliability/Characteristics

by jnc＠mercury.lcs.mit.edu

> From: Lyle Bickley > I have had packs on rare occasions which when I first obtained them had > a few records which were unreadable - and a clean reformat made them > 100% error free. Err, I thought RL02 packs came pre-formatted (at least, the low-level stuff like sector headers, etc), and could not be field re-formatted? Or are you simply talking of a high-level re-format (i.e. the file system), which might write all data blocks to zero or something, thereby getting rid of the un-readable contents of such blocks? > From: Mike Ross > It's high time someone collated all the 'new hardware' projects out > there ... should be a one-stop shop where info on all this stuff is > held. The obvious place to put it is on our Wiki, of course... (Hint, hint... :-) Noel

9 years, 8 months

RL02K Pack Reliability/Characteristics

by christopher.parish＠parishcomputers.com

I've gotten my RL-02 -> USB Mass Storage controller mostly working with a few residual gremlins. Specifically, I've noticed from my testing that I have good packs, ones that read out almost the same every time, and bad packs, ones where half the bits seem to be in different states every time I read them. I've left write support untested until I can solve this problem. Right now, my working theory is that different controllers had slightly different timing characteristics, and I may need to adjust more of my DPLL parameters dynamically to deal with that (something I'd rather avoid). Of course, most of these packs haven't been put into a drive since the mid-80s, and there could be some bit rot going on. As many of you have much more experience dealing with these drives than I do, my questions are: - What type of long term reliability have people noticed from their RL02K packs? - Is garbage data sometimes normal for certain packs until they are rewritten with ?fresh? data? - Has anyone noticed pack compatibility problems between various computers/RL-02 controllers? Thanks, Christopher

9 years, 8 months

HP-85A tape drive conversion

by Wayne.Smith＠warnerbros.com

> Date: Tue, 31 Mar 2015 06:20:04 -0500 > From: "Jay West" <jwest at classiccmp.org> > > So. two questions: What SHOULD the outer diameter of a good capstan roller > be on that drive, and does anyone have other suggestions for how to make the > capstan roller "taller"? I would try gluing an extender piece on the end of the existing capstan roller, perhaps using wood which is easy to shape. Once you wrap it with a piece or two of heat shrink tubing, I would think that it would all stay in place.

9 years, 8 months

F, L, and M Vax boards

by useddec＠gmail.com

We just sorted and shelved the following boards, most of which I will never use. If you are interested in any or all, feel free to make an offer off list. There are a few non DEC ones I have to figure out yet, otherwise this should be most of them. If you need L boards not listed here, let me know. I have a friend who has some. Quantities available on most. Thanks, Paul F1002 F1003 F1004 F1005 F1006 F1007 F1008 F1009 F1010 F1013 F1021 L0007 L0008 L0104 L0107 L0108 L0109 L0115 L0217 L0225 M7463 M8238 M8286 M8287 M8288 M8289 M8373 X 14 M8574? I need to recheck part number on the last 2. M8576?

9 years, 8 months

Burroughs keyboard

by ehogan＠unimetrix.com

Have a Burroughs B25-K2I keyboard for sale. Best regards, Ed Hogan Unimetrix Corporation 20371 Lake Forest Drive Suite A-7 Lake Forest, CA 92630 Phone: 949-215-2475 x101 Toll Free: 800-633-9955 x101 FAX: 949-215-2472 Email: ehogan at unimetrix.com Web: www.unimetrix.com <http://www.unimetrix.com/> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.

9 years, 8 months

USB --> SCSI

by paulkoning＠comcast.net

> On Mar 31, 2015, at 4:00 PM, John Foust <jfoust at threedee.com> wrote: > > At 01:14 PM 3/30/2015, Paul Koning wrote: >> I think iSCSI target support is now a standard Linux iSCSI feature. If not standard, at least reasonably mainstream. I haven???t tried it, but I see plenty of references to it on the Linux iSCSI mailing list. > > Are they running old tape devices on it? Tape? Not that I know of. In principle iSCSI can handle tape, but I don?t know if it?s been done at all, never mind in Linux. paul

9 years, 8 months

EPROM image for CMD CDU-710/M or 710/TM?

by derschjo＠gmail.com

Hey all -- I'm looking for an image of the EPROM on the CMD CDU-710/M or /TM UNIBUS SCSI adapters. The 720s have been archived, but only the /T (tape only) variants are imaged for the 710... Anyone out there have one of these boards and be willing to dump the ROMs? Thanks in advance, Josh

9 years, 8 months

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test-drb March 2015