Hello Poul-Henning,
I replaced all the NVRAM's in mine last month, no issues. There are plenty of NVRAMs to be had as new.
that's good news. What have you used?
>Also, of course it would be a good idea to read and save the contents >of the SRAMs before replacing, but... is any custom data in them that >cannot be rewritten with a complete recalibration? The CALRAM contains a number of "magic" counters, one of which is called "destructive overloads" that a calibration cannot possibly restore. But from a functional point of view: no. You can read out the memory with the undocumented "MREAD" command, but the CALRAM is protected by various tricks, so you cannot just use the MWRITE command to restore it.
So, have you read the RAM with an eprom-programmer, and then rewrote them, or simply replaced?
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