On Oct 18, 2005, at 10:24 AM, Marcelo Tosatti wrote: > For 8xx, I was wondering if the PARTNUM field of the IMMR > (section 10.4.1 of MPC860UM.pdf) does have meaningful > information which could be used to identify the CPU.
It has meaningful information, but not the way you want to use it :-) The PARTNUM/MASKNUM is only useful once you know the type of processor (like 823, 850, 885, etc) The PARTNUM is only useful within the "family." For example, the 860 and 880 are two different families, and will contain the similar PARTNUM values through their life. I believe it's tied to the fabrication process. You may as well stop looking for an easy (or possibly any) way to differentiate these parts in software, but due to they way they are fabricated, I don't think that's ever going to happen. :-) -- Dan