[time-nuts] Re: HP 5372A opt. 040 FFT

Magnus Danielson magnus at rubidium.se
Mon Jun 21 11:17:30 UTC 2021


Hi Poul-Henning,

On 2021-06-21 09:54, Poul-Henning Kamp wrote:
> --------
> Magnus Danielson writes:
>
>> I have a HP5372A with option 040.
>>
>> I would assume it's just another EPROM on the CPU board and a DIP-switch
>> setting to tell it's installed.
>>
>> I do not recall that I've seen an installation description of it, but it
>> should be fairly easy to identify which EPROM it should be.
> I strongly suspect that the 5372 has a command called "MREAD" to read a
> memory location, but I have not spent the time to reverse-engineer the
> command-parsing code enough to know how to invoke it.
>
You have EPROM-images of the normal FW?

Anyway, if that would be possible, it would be a splendid little
work-around. 

Cheers,
Magnus




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