From: Brian Roth <abacos_98 at yahoo.com>
To: "cctech at classiccmp.org" <cctech at classiccmp.org>
Subject: VAX 11/780
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<1365090232.96105.YahooMailNeo at web141403.mail.bf1.yahoo.com>
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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
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"
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/
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
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>
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>
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.
> 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.
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
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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