How about "lsattr -El proc0" or "lscfg -vl cpucard0 | grep FRU" ?

The FRU number will tell you the processor type but only after a bit of translating.

I'm not sure about "bootinfo -p", maybe this tells you the processor type along with the architecture, maybe not. Beware, though (ah, well, not really): in systems prior to AIX 4.2.0 it was "bootinfo -T".

I hope this helps.

bakunin