Yeah, it's gotta be either the RAS line or software. Probably software, I think. I never did manage to get a cache_flush() and tlb_flush() call to work during the memory probing -- those might be necessary for Mk1/Mk2 probing to work. The Mk2a probing works right now, but breaks whenever I try to tweak it. Really gotta flush them caches to know for sure. Somebody has to look up in the Sa1100 manual for how to do it correctly.

Cheers