68060RC with fpu and mmu

[johnklos]

I have a first generation, and I'd guess others do, too, but that's not what you want.

Is there any specific reason? People usually get the last mask so they can run it faster or at least cooler, but the differences between the first and next masks aren't significant. The only errata fixed between the 1F43G and the 1G65V masks is the F6 errata which most compilers already avoid by inserting a NOP in a specific set of instructions.

[johnklos]

I'm not sure that the first 060 is working fine on a BlizzardPPC (because of some 3 diodes...)

Electrically there were no changes between '060s aside from lower power consumption. If you're worried about power consumption, the die reductions don't start until mask 1E41J and later.