test-drb

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101090 discussions

by steve＠cosam.org

After a few years in storage I'm finally getting to play with my PDP-11 stuff again. Figured I'd start small so rolled out the 11/23. PSU looks fine, pulled all the cards and checked voltages, no problem. Shortly after however, some magic smoke was released from the block in the back where AC comes in and the power switch is mounted. The only other thing in there is a big old line filter. Judging by the smell, I suspect a filter capacitor has given up the ghost. I'd check, but the whole thing is soldered shut so not exactly easily serviceable. Would I be correct in thinking such filters aren't entirely necessary and could just be bypassed? It looks like the manufacturer (JMK) is still going so a new replacement might not be out of the question. Whether I could find one with the same mounting holes etc. is another question I've not looked into yet. Cheers, Steve

5 years

VAXstation 4000/vlc mouse issue

by healyzh＠avanthar.com

I now have my VAXstation 4000/vlc up and running OpenVMS 7.3, DECnet Phase IV, and part of my cluster. It?s using a SCSI2SD v5.2 board for the hard drive. While have plenty of DEC Hard Drives, I like the lower noise, power, and heat of the SCSI2SD?s, plus I can really cram the disk space in there, this has a whopping 32GB. :-) I?m using a VSXXX-AA mouse (Hocky Puck), and when I use the middle-button on the mouse, it messes up DECwindows, and I?m no longer able to use the other buttons, which means I can?t change to another window, or access menus. It remains like this until I either logout, or reboot. Does this sound familiar to anyone? This is actually the first time I?ve used a VAXstation as a VAXstation, so I don?t know if this is normal (though I can?t imagine it is). Zane

5 years

H960 documentation

by jnc＠mercury.lcs.mit.edu

So, I have images of two different pieces of DEC documentation for the H960 series of racks/cabinets (the H950 is the bare rack; the H960 is the rack complete with various appurtenances such as side panel, stabilizer feet, etc). I had a request for them, so I've put them online. They are: http://ana-3.lcs.mit.edu/~jnc/tech/H960/DEC_cabinets1.jpg http://ana-3.lcs.mit.edu/~jnc/tech/H960/DEC_cabinets2.jpg The entry in the Direct Sales Catalog which covers them; includes illustrated breakdowns, and the DEC part numbers for everything. http://ana-3.lcs.mit.edu/~jnc/tech/H960/DECRackManual1.jpg http://ana-3.lcs.mit.edu/~jnc/tech/H960/DECRackManual2.jpg http://ana-3.lcs.mit.edu/~jnc/tech/H960/DECRackManual3.jpg http://ana-3.lcs.mit.edu/~jnc/tech/H960/DECRackManual4.jpg http://ana-3.lcs.mit.edu/~jnc/tech/H960/DECRackManual5.jpg The Assembly Guide; it shows in detail how all the bits go together (includes all the captive nuts, bolts, etc). Noel

5 years

MA8807A ic datasheet wanted

by ard.p850ug1＠gmail.com

OK, this is mildly off-topic... I am working on a piece of telecom-related test gear and there's one IC I can't find data on. It's a 40 pin DIL package made by GEC (the UK company), marked MA8807A. I thought at first it was a ULA, but I can find refeences to a 8bit * 8bit -> 16 bit multiplier with that number, so I guess that's it. But I can't find a datasheet or even a pinout. It may have appeared under the Plessey brand too, but I am not certain of that I've been along my bookshelves, looked in the obvious books on bitsavers etc and found nothing. Does anyone have any data on this chip? -tony

5 years

Cypher 68000/Z80 SBC, Motel Computers

by peter＠oneillassociates.com.au

While going through some boxes which have been unopened since my last move 15 years ago I found a Cypher 68000/Z80 single board computer by Motel Computers Ltd, Ontario Canada that I bought back in 1986. In another box I found some of the documentation. I'm hopeful of finding the manual and disks but they haven't turned up yet. Does anyone have the manual and disks for this board? Regards, Peter O'Neill

5 years

Fabritek logic trainers anyone have manuals for these? Anyone have one of these trainers besides us??

by couryhouse＠aol.com

Fabritek logic trainers? anyone have manuals for these? Anyone? have one of these trainers besides us??Ed at SMECC MUSEUM PROJECT? Sent from the all new AOL app for Android

5 years

how to make use of daisy wheel printer

by chris＠groessler.org

Hi all, what are the word processing options for a daisy wheel printer? I would like to be able to write "bold face" (double stroke) and underline some parts. I guess there aren't any other capabilities to exploit on a daisy wheel printer. Operating system is unixish (Linux/NetBSD/FreeBSD). MS-DOS would work, too. Maybe something like (g|t)roff? Is there something you'd recommend? regards, chris

5 years

COMPAQ ISA PC to ethernent

by rdawson16＠hotmail.com

If anyone has ideas about boards or software to connect this original Compaq to the net let me know! Browsing the ebay, I do not find a PC 8 bit ethernet board but still looking. Then, the rest, a net set of tools in source would be great.

5 years

MicroVAX 3300/3400

by healyzh＠avanthar.com

I?m still not 100% sure if this is a 3300 or a 3400. It?s in a BA400X chassis, and after looking at the manuals last night, it seems like it?s closer to the 3400. My familarity with Q-Bus MicroVAXen is limited to MicroVAX/VAXstation II?s, and a MicroVAX 3. After getting a power cable (the only one at PCH Cables was a 3? one, and I didn?t want to wait for more to come in), it powered right up, but is failing 4 tests. I quickly learned last night that ?TEST 9E? prints all the tests out to screen. This effort is making me wish I had a DEC LA50 plugged into the terminal. :-) It starts counting down diagnostics at ?41?. 27.. ?57 2 17 FF 00 0000 22.. ?C2 2 01 FF 00 0001 07.. ?5C 2 01 FF 00 0002 06.. ?5D 2 0B FF 00 0003 57 = SI_memory incr test_matter ***** C2 = SSC RAM ALL * 5C = SII_initiator ****** 5D = SII target ******* I think this is indicating issues with the DSSI interface. The system has two RF73 DSSI drives, which sound like they spin up. It also has a TK70 tape drive. It says it has 4MB and 16MB RAM, all good. One odd thing is that the KA640-A seems to plug into another board, before the DSSI drives. I?m getting ready to dig into that, and find out what that board is. Zane

5 years

How to read Osborne 1 Floppies?

by marvin＠west.net

Depending on when you need them, VCFMW is coming up in a few months. I have a number of Osborne 1's as well as a couple of 386 machines set up with Teledisk (I bought it *years* ago when it became available to listmembers), imagedisk, and *maybe* Dave Dunfields IMD(?). As VCFMW gets closer and you still need these floppies read, let me know and I'll put the machines in with the stash of "junque" to unload :). I *think* you are on the East coast, and it would surprise me if the RICM doesn't have working Osbornes. Marvin > Message: 3 > Date: Tue, 25 May 2021 10:37:03 -0700 > From: Zane Healy <healyzh at avanthar.com> > To: Fred Cisin <cisin at xenosoft.com>, "General Discussion: On-Topic and > Off-Topic Posts" <cctalk at classiccmp.org> > Subject: Re: How to read Osborne 1 Floppies? > Message-ID: <13B8E14A-BCAD-4A5B-B81A-7E6E6F373B6B at avanthar.com> > Content-Type: text/plain; charset=utf-8 > > Yes, we need to be able to access the files. > > I?m going to see if my old 486 will still boot up, I know I used to use it with imaging RX50 floppies. I?m not an x86 collector, so have a pretty limited selection of PC Hardware. I?m on my Sabbatical right now, so this request came in at a good time. Though first I have to finish up on some VAX and Alpha systems I?m working on, so as to free up space. That or finish a cleaning project in my office. :-) The cleaning project is needed to finish the VAX/Alpha projects? > > Is there any chances of reading these with Commodore 128 running CP/M, or a Kaypro 2? The Kaypro is definitely on my ?project list?, it worked last time I played with it. I *might* have a DEC Rainbow, or I might have given it away. If I do, I have no idea of its condition. An Apple //e would be another old system with 5.25? drives, but seems more unlikely. I might still have an old Kaypro PC, though it hasn?t been used since ?94 (and there is a good chance it went to LCM). > > My focus is DEC and Commodore, though I do have a lot of Apple // gear. > > Zane

5 years

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