[weblacky]

The two PROM chips could well be the CPU PROM and IO PROM. On IP27, the CPU PROMs were on the nodeboards and the IO PROM on the IO6/IO6G. On a Fuel they are both on the mainboard but architecturally it's close to IP27 so they may simply have kept the dual chips.

This was my exact thinking in formulating my response. But I wasn't sure if architectures like the Tezro might have one chip on the IO9 controller and the other chip on the main board. Obviously Fuel is a single board device in that regard, but same family so same overall component needs during design. So my brain was leading me there.

The programming output from the flash command does talk about programming the bedrock, so perhaps one of them is the programming for the bedrock?

But that being said, I think the concept might hold water. After all, we're talking about recovering a mainboard so as long as it's the same revision, one would think a complete overwrite would still be OK.

I can see a partial rewrite might have compatibility issues or segment update issues, but perhaps a total replacement where everything was chill with the donor might still be a thing. It's definitely going to be on my "look into" list.