[jwhat]

Hi vvuk,

Booom!!

>>CONFIG_MAGIC is 0x69703237636f6e66 -- which is "ip27conf"! So we have the start of a ip27config_t struct at octal 0060.

I think you have found what we are looking for, in "/usr/include/sys/SN/SN0/ip27config.h" !!

If you look up in the discussion you can see the POD/CAC commands which seem to relate to writing into PROM.

The problem is that they only info in what you get from the POD/CAC help command, which is not much.

Awesome.

The really big question is can you somehow get the Fuel to boot into lower speed to allow you to zap the PROM before it goes into full boot cycle.

If so we have a way to save what might initially appear to be dead Fuel boards because they had faster CPU in them.

The other way would be to have a 900 MHZ Fuel PIMM lying around just for the sake of trying to rescue old board ...

I know I don't have such a PIMM ;-)

EDIT #1: I see Weblacky and I responded around the same time. He is thinking of memory ZAP, I am thinking PROM ZAP. Either way could work.... if it worked ;-)

EDIT #2: On POD/CAC there is actually 2 modes CAC == Cached , DEX == Dirty Exclusive (see: https://www.graphica.com.au/docs/origin-...ooklet.pdf page 174), This doco is also available on Web Archive. This might help in Memory (temp) vs persistent (prom) commands... just floating ideas here.

Cheers from Oz,

jwhat/John.