test-drb

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101090 discussions

Still looking for: Nova 800/1200 power supplies

by derschjo＠gmail.com

Hi all -- Nearly two years back I picked up some Nova 800/1200 gear, mostly in pieces. I've been trying to track down power supplies for these for awhile, thought I'd try asking here again and see if I have any better luck this time :). Both chassis are the "Jumbo" variety, and take two power supplies each -- one that provides +/-5 and +/-15 and another that just supplies dual +5. At the moment I have just one power supply -- a dual +5 supply. I also only have one of the "DGC NOVA RESISTOR BD" boards that are the go-betweens between the backplane and the power supply -- the 52-pin edge connector from the supply plugs into this board, and the board plugs into the backplane. I need at least one more of these... It's relatively unlikely, but if anyone happens to have any 800/1200 power supplies going spare, in any condition, drop me a line. Thanks again, Josh

9 years, 7 months

Stuff for sale in Seattle

by derschjo＠gmail.com

Hi all -- Spring is nearly here and it's time to clear out some space. The following stuff must go, drop me a line if you're interested. Local pick-up in Seattle, WA. Free: - 2x TI 1500S UNIX workstations. One's an S1505 with a 68030, one's an S1507 with a 68040. Both power up and pass built-in diagnostics. No OS media, no drives. - Honeywell/Bull DPS-6 workstation/server. No OS media, no drives, no drive controller. CPU, Memory, I/O present. Heavy. A bit dirty, but will clean up nicely. For Sale: - Zilog S8000. This is a Z8000-based machine that originally ran a UNIX port called ZEUS. System includes CPU unit, two 80mb SMD drive units (one with cartridge tape drive) and two empty units at the bottom. I had the system powered up and running a couple of years back, but I have no OS media (this would appear to be a theme) and the hard drives were either wiped or corrupted. I have a few spare boards as well. I actually really like this system, but I need the space. Asking $250. Thanks, Josh

9 years, 7 months

In search of VAX 8550 or similar...

by ian.finder＠gmail.com

Would like to purchase and restore a big mid-80s VAX. Stupidly passed one up recently. Let me know if you have one you'd be willing to part with- also open to trades. In the Seattle area, but a little too comfortable with arranging freight shipping... Sent from Outlook for iPhone

9 years, 7 months

IBM/PC XT and AT boot disks needed

by rich.cini＠verizon.net

All ? I?m helping a buddy of mine restore an original XT and original AT and I?m looking for original boot disks for them. I have the AT Diagnostics disk but the other disks I have seem to be bad. Does anyone have images that they could send me or point me to an archive of original disks? Thanks! Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32

9 years, 7 months

websites on the classiccmp server

by jwest＠classiccmp.org

9 years, 7 months

DEC LPS11 Laboratory Peripheral System for PDP-11

by echristopherson＠gmail.com

I saw a DEC LPS11 Laboratory Peripheral System for PDP-11 somewhere and was thinking of getting it just because of the Digital nameplate, but I was too broke. Now I see that an ebay listing[1] of it has the ambitious Buy It Now price of $1600 -- but that's with cabling and a book of schematics, and they've tested it out at least a bit; and it has analog in and out, and several specific boards in it. The one I found, on the other hand, is untested and doesn't have any external goodies; it does seem to be populated with boards, but I don't know what they are. It also seems to be lacking any analog in or out (unless the "DISPLAY" port is an analog out). I'm wondering if there would be a demand for this item. If so, I may have to send someone to pick it up for me when the place is open next. [1]: http://www.ebay.com/itm/DEC-LPS11-Laboratory-Peripheral-System-for-PDP-11-A… -- Eric Christopherson

9 years, 7 months

H-11 Updates

by rich.cini＠verizon.net

All ? It?s been a productive two weeks with my pseudo-DEC Heath H-11. I got myself an Emulex UC07 SCSI card and a SCSI2SD SCSI drive emulator. After a week of noodling around with why the on-board diagnostics wouldn?t load (stupid LTC jumper) I was able to confirm that the board and SCSI2SD setup worked. Tonight I built an RD54 image of RT-11 v5.7 using SIMH and dd?ed it to the card and now I have RT-11 5.7 running over SCSI. Yea! Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32

9 years, 7 months

Voltage regulator with alternate voltage source...

by hilpert＠cs.ubc.ca

On 2016-Apr-08, at 11:58 AM, Bill Sudbrink wrote: > I don't know why I bothering to be coy about it... > > My unit here: > > http://wsudbrink.dyndns.org:8080/images/cyclops-latest/P4060005.JPG > http://wsudbrink.dyndns.org:8080/images/cyclops-latest/P4060006.JPG > > Actually, I'm further along than that, but I > don't have more recent photos. > > Original unit here: > > http://www.swtpc.com/mholley/PopularElectronics/Feb1975/PE_Feb_1975_pg30.jpg > > Schematic here: > > http://www.swtpc.com/mholley/PopularElectronics/Feb1975/PE_Feb_1975_pg28.jpg Well that's neat. I assembled the Cromemco kit version of the Cyclops ( https://en.wikipedia.org/wiki/Cromemco_Cyclops ) ca. 1976 for a friend with an IMSAI, and built the companion adapter to provide display on an oscilloscope, but I don't know that it was ever made to work. (The kit version presented an interface for a computer rather than the scope drive of the magazine article. Hopefully you're more successful with your unit. (I think you'll find the MC7805 there is indeed plastic not ceramic. Moto produced various power transistors and regulators in those packages (case 90 in Moto parlance) as well as a smaller version from the same plastic material) A 9V wall wart would probably do for the power supply, or remove the regulator and use a modern 5V switching wall wart (not that I wish to promote wall warts, but if they're on hand . . )

9 years, 7 months

ADM 3a with no horizontal scan

by lists＠loomcom.com

Hey folks, I've been on a tear trying to resurrect old projects here, and next on the list is an ADM 3a. This particular 3a has no horizontal scan. None at all. I just get a vertical line down the center of the screen. First thing I checked was the horizontal deflector on the yoke, which seems secure. Before I go diving into the schematics, I figured I'd ask here: Is this a common failure mode? Has anyone else experienced no horizontal scan on a 3a? Any tips on where to look first? -Seth -- Seth Morabito seth at loomcom.com

9 years, 7 months

Stuff searching for new home around Duesseldorf, germany

by jnc＠mercury.lcs.mit.edu

> From: Peter Koch > rumours are that kids do place stuff like this into their parents > basement :-) I've even heard rumours of parents placing stuff like this into their kids basements! (I certainly have some PDP-11's in my daughter's old bedroom! :-) Noel

9 years, 7 months

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