> Does anyone happen to know what the R4Kc anc R5KC use for the company ID of the > PrID register (bits 23-16)? I'm assuming it's 1, which is reserved for MTI, > but bits 15-8 seem to be carefully chosen not to conflict with previous > processors in the non-MIPS32/MIPS64 PRiD space. The MIPS 4KC has a PrID of 0x000180xx The MIPS 5KC has a PrID of 0x000181xx Kevin K.