Allowable Electronic Parts

[ptan]

Hi,

Forgive me if this is already answered somewhere, but I am new (as a Mentor) to FRC (I've been coaching FLL for the past 6 years).

What is the exact rule on allowable custom electronic parts? I.e. Can we put in an additional CPU to process the Images from the CMU camera? (I am thinking of getting the team to hack a NSLUG or a OpenWRT Linksys box).

What is the specific rule regarding additional CPUs?

If that is not allowed, are we allowed FPGA's?

I understand that we cannot modify the circuitry from the main CPU to the motors, so this would be just for additional sensor processing.

Thanks.
Paul C. Tan. P.Eng.