On Sun, 3/24/19, bobh@... <bobh@...> wrote:
Subject: Re: [TekScopes] 11801 NVRAM
To:
[email protected] Date: Sunday, March 24, 2019, 4:44 PM
Re: ROM images, did you check
here:
Search ko4bb for 11801.
Bob.
On 3/24/2019 7:26 AM, Reginald
Beardsley via Groups.Io wrote:
> I was
able to select a DS1230Y NVRAM package on the TNM5000 and
read U500.? However, it only contained 32 bytes of data.?
Everything else was alternating 32 bytes of 00 and FF.
>
> I should note that
when I selected the NVRAM part, the TNM put up a warning to
select the device before inserting the device in the ZIF
which is the opposite of what I did.
>
> Does anyone have images of? U500 and U511
from a CSA803 or 11801 which has the factory cal data??
We'd also need the 200 MHz OXCO measured using a GPSDO
referenced counter and the version of the timebase board
ROMS.? Mine are version 10.1 dated 1991.
>
> Does anyone of the
list know who designed the board?? It's dated 1988.?
It they are still alive we might get some help from them.
>
> Is there any
information on the recalibration process?
>
> This needs to be
documented before all of them fail. Twenty odd years ago
there was a detailed description of how to recover a Sun
workstation from a failed NVRAM.? So if you bought a used
system, one of the first things you did was record the
serial number, etc for future reference.
>
> Reg
>
>
>
>
