Hey Roger,
I don't know the answer to your question regarding reading and writing the
NVRAM. But I wonder why you feel you need to save and restore the NVRAM
data.
The calibration information for the scope is not stored in NVRAM, it's in
EEPROM on the acquisition board, so you don't need to worry about the
calibration information. AFAIK the only information of value in the NVRAM
is the options bits, and it's well known how to write to them to enable
whatever options you have and/or want to enable.
Also, if you install the new NVRAM in a socket, you should be able to
safely defer the decision on buying a programmer. In the worst case
scenario, you'll still have the old NVRAM, and to program the new one,
you'd only need to pop it out of its socket.
All that being said, I'd love to know what people here are using to read
and write NVRAMs ;).
Siggi
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On Sat, Sep 19, 2020 at 6:01 PM Rogerio O <rodd414@...> wrote:
Dear all,
I will have to replace the dallas chips (DS1486/DS1650) of my TDS684A.
I have ordered the replacement kits (not fake China chip) from a source I
have found in EEVBlog.
While I wait, I have dowloaded the contents of the chips to a floppy using
a tool that does that.
My question is about the next step.
I intent to read the chips (just in case) and I will have to write one
image to them.
I currently have a TL866A and a GQ-4X, but I have seen posts that say that
neither programmers will work.
I can¡¯t afford spending $500 or more in another programmer.
Is there any consensus out there if any of these can be used?
Any special recommendation about programming. Which chips should be used
as ¡°target device¡± for the DS1486 and the DS1650?
Thank you
