test-drb April 2013

test-drb@ccmp.vtda.org

205 participants
273 discussions

by elson＠pico-systems.com

From: Brian Roth <abacos_98 at yahoo.com> To: "cctech at classiccmp.org" <cctech at classiccmp.org> Subject: VAX 11/780 Message-ID: <1365090232.96105.YahooMailNeo at web141403.mail.bf1.yahoo.com> Content-Type: text/plain; charset=us-ascii I just recently acquired a very nearly complete VAX 11/780. I will be spending the next few months in a partial tear down and cleaning and with luck, hopefully little money to get it operational again. I am looking for whatever spare parts I can find for the VAX and its TU78 tape drive. I have plenty of spare drives and such. One thing I am in need of is a console boot floppy and whatever diags I can find on floppy for it. Also, I do have a hobbyist license but I would like to get an early version of VMS to run on it if I can find a tape. Holy moly! Amazing! Well, I used to know the 780 pretty well, but didn't save anything >from the two I was manager of. The biggest problem I might imagine is getting the LSI 11 to boot off the floppy drive. I suspect original floppies may have deteriorated to the point they won't read. Higher-level diags can be booted from tape, but there were some low-level diags like control store diags that could only be run from the LSI 11. I believe the machine could actually CREATE a new diag floppy >from the diag tape, though, so if you can find good blank floppies you could recreate the diags. Hmm, refresh my memory, the TU77 was the 800/1600 BPI drive and the TU78 was the 1600/6250 drive? I'm pretty familiar with both. We had an early TU77, and went through about 13 mod kits on it to get it to stop melting tapes on the heads. It really flew through tape, though. Good luck restoring this machine! Jon

12 years

Manuals needed...

by lbickley＠bickleywest.com

I'm looking for operating manuals and user guides for the following software products: ManagePro 2.0 (Avantos Performance Systems, circa 1993) Siebel 3.0 Siebel 98 Originals are best, but copies are O.K. Marketing, sales literature or brochures for the above products might be of interest. A bounty is available! Cheers, Lyle -- Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"

12 years

Miniterm 1205S

by mloewen＠cpumagic.scol.pa.us

Does anyone have a service manual or schematics for the Computer Devices Miniterm 1205S? Thanks. Mike Loewen mloewen at cpumagic.scol.pa.us Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/

12 years

VAX4000-100A with P-cache problems

by shadoooo＠gmail.com

Hello. I have a VAX4000-100A system, that's fully working, except for a strange error on boot that notify about errors in the P-cache. VMS starts up, but again it notify that P-cache will be disabled due to high error-rate. Probably the CPU has been damaged somehow, or it's malfunctioning (if I'm not wrong the P-cache is integrated inside the CPU). Anybody ever had a similar problem? Could it be possible to find a replacement CPU somewhere, not at terrible cost? Thanks Andrea

12 years

Needed: older connector power cord

by legalize＠xmission.com

OK, I've got an HP X-Y display with the older power cord connector, where the three pins are round instead of two being blades and the only the ground pin being round. The entire plug socket is also rounded instead of angled. I've tried to find a relevant picture on the interwebs, but you try googling "power coord connector" sometime and see if you can find the older oddball you're looking for... Hopefully my description alone is enough to aid someone in identifying the exact standard/specification for this kind of connector. I'm looking for cords that fit the connector. I will try to remember to take a picture with my phone on Wednesday when I am down at the museum, if we can't figure it out by then. -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://computergraphicsmuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>

12 years

Needed: older connector power cord

by legalize＠xmission.com

Earlier I wrote: > OK, I've got an HP X-Y display with the older power cord connector, > where the three pins are round instead of two being blades and the > only the ground pin being round. The entire plug socket is also > rounded instead of angled. Found a guy who has them for considerably cheaper than ebay and he still has stock for anyone else who needs some: <http://www.apexjr.com/wire.html> -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://computergraphicsmuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>

12 years

Qbus identification

by roe＠liveblockauctions.com

I'm looking at upgrading a pdp11/73 in a pdp11/23plus box to an 11/83. Is there a simple multimeter test I can do on a qbus slot to determine if it is Q/Q -- which i understand can be serpentine, or Q/CD, which are PMI capable for the 11/83 CPU. Thanks.

12 years

What's this 88000 based qbus cpu about ?

by tshoppa＠wmata.com

> Anyone know what these are from http://www.ebay.com/itm/150407824254 ? > > It looks like a Motorola 88000 based cpu board. I was able to find > some mentions of a few 88000 floating point boards for use in MicroVAX > II but, can't find anything about Avalon A7Q. If these were > replacement cpu what did they run ? Avalon sold math and especially FFT/image/convolution/deconvultuionco-processors in the late 80's and 90's. Used in (among other things I'm sure) medical imaging back-projectors. "Back-projector" seems to mean something different today in google searches... back in the 80's and 90's we called the processing system that takes raw data from CAT scanners and turns it into a image, "convolvers" and "back projectors". For a while in the early 90's, the same generation Avalon co-processor was available in Unibus, Q-bus, and Turbochannel all at the same time. I remember I could get a Alpha processor on a Unibus card at one point! For a while (again mid-90's?), I think one company that sold Avalon boards used the name "teraflop.com". e.g. http://web.archive.org/web/19970116193017/http://teraflop.com/acs/acs.html Avalon corporate history also at archive.org: http://web.archive.org/web/19970116193719/http://teraflop.com/acs/html/hist… This (from the mid-90's) discusses some of the history of Avalon from a typical number-cruncher's perspective: http://www.taborcommunications.com/archives/1530.html Tim.

12 years

update to Amiga 4000/040, for all those who have asked

by sales＠elecplus.com

The Amiga 4000 powers on with no errors. The original battery is on the motherboard, but there is no visible damage. The motherboard is exceptionally clean. There is an EB920 network card (1 BNC) and a modem installed in the ISA slots, as well as 2 sticks of memory. The hard drive is a Seagate ST3144A that does not make excessive noise. I found a Commodore 1084S monitor with the appropriate cable, plugged everything in, and it works! The screen scrolls badly, so that needs to be adjusted, but it is evident that there is a GUI installed. I do not find an Amiga keyboard or a Commodore mouse at this time, but I do have 9-pin serial mice and standard PS2 keyboards. Asking $400 for the computer, monitor, 9-pin mouse and generic kbd, includes UPS ground shipping to commercial address. Add $20 for residential address. Please note the rubber feet on the computer have melted into a gooey mess, so I will remove them. The case top has several scratches/rubs, and the front plate has a minor chip on the bottom. The monitor is in good shape, although not the same shade as the computer. There is no CDROM in the computer, just the floppy and hard drive. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 (830)792-3400 phone (830)792-3404 fax AOL IM elcpls _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3267 / Virus Database: 3162/6223 - Release Date: 04/03/13

12 years

Chip 733w01522 on xerox 820-II FDC controller. what is it?

by enrico.lazzerini＠email.it

Is there anybody who knows what is this old chip? And where to try to find it? If it help what I know is that it used to do somenting like shift data register or Serial Shift Registers. It has a TTL level signal on its pins, it has 14 pins. You can see it named U1 in the centre of this schematic: <https://www.dropbox.com/s/zqhgar4g7ib5j4z/Xerox820_FDC_Schematic.pdf> https://www.dropbox.com/s/zqhgar4g7ib5j4z/Xerox820_FDC_Schematic.pdf Some pins are labelled on a schematics with: 1=D1, 2=D2, 3=D3, 4=D4, 10=A1, 11=A2, 12=A3, 13=A4, 14=A4, 15=ChipEnable (left to GND), 7=GND, 14=+5Vcc Thanks Enrico

12 years

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test-drb April 2013