Yesterday we started disassembling the CRT from the VR12. We picked out the
silicone that attached the metal bezel to the front of the CRT. The exposed
PVA was about 1/8" thick so we picked at the edges to remove as much as
possible. We found that the shield was actually loose and were able to
remo
Getting an old machine like this back to running is always
great news.
It is one less piece of history that is lost.
When the early computer designers made these first OS
for these machines, I don't think they'd been exposed to the
consuming effects of "Moore's Law" yet. Most felt they were
creatin
great news. hope for further success.
On Sun, Aug 2, 2015 at 10:19 AM, Michael Thompson
wrote:
> With a lot of help from Dave Gesswein and Warren Stearns we were able to
> get the MARK12 PDP-12 tape formatting program off a LINCtape and int paper
> tape format. Running it showed that a diode on
Congrats Michael!
"This is the first time in 24 years that an OS has been run on this
system."
Ed# and crew at smecc.org
In a message dated 8/2/2015 7:20:02 A.M. US Mountain Standard Time,
michael.99.thomp...@gmail.com writes:
With a lot of help from Dave Gesswein and Warren S
With a lot of help from Dave Gesswein and Warren Stearns we were able to
get the MARK12 PDP-12 tape formatting program off a LINCtape and int paper
tape format. Running it showed that a diode on the field-0 core stack had
failed during the week making memory in the range of 4000-5000 unusable.
Fort
Some progress on the PDP-12. We borrowed a TU56 tape head from the TU56 in
the warehouse and replaced the broken right head. We reran ran
MAINDEC-12-D3AE-PB PDP-12 TAPE CONTROL TEST, PART 1 OF 2. The diag runs OK,
so at least the timing track in the borrowed tape head is OK.
We reran MAINDEC-12-D3
We received more documentation from the donor last week so we were able to
run the processor LINC instruction tests. The new docs are already scanned
and on Bitsavers. The LINC diags failed, but we quickly found the bad M160
flip-chip and now both LINC diags run OK.
We continued debugging the "LGP
On 7/13/2015 4:59 PM, Michael Thompson wrote:
>> Date: Mon, 13 Jul 2015 01:52:09 -0400
>> From: "Kip Koon"
>> Subject: RE: PDP-12 at the RICM
>>
>> Hi Michael,
>> I would be most interested in finding out more about this effort. Do you
>> have ongoing pictures documenting this effort? I'd love t
>
> Date: Sun, 12 Jul 2015 16:10:10 -0500
> From: Jay Jaeger
> Subject: Re: PDP-12 at the RICM
>
> BTW, if there are particular cards you need / are bad, in addition to
> the actual PDP-12, I have the backplanes and cards for a 2nd one, so if
> you need something, we could probably work something
>
> Date: Mon, 13 Jul 2015 01:52:09 -0400
> From: "Kip Koon"
> Subject: RE: PDP-12 at the RICM
>
> Hi Michael,
> I would be most interested in finding out more about this effort. Do you
> have ongoing pictures documenting this effort? I'd love to have a PDP 8,
> 11, 12 someday, but I don't have
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