At least RCPI seems to be well defined, and I think we can add it to radiotap for those drivers that can reliably compute this value. Quoting from Simon's post: "The allowed values for the Received Channel Power Indicator (RCPI) parameter shall be an 8
WRT54GS 1.0 The GSv1.0 has a 4712 processor. It will run best on VINT builds but regular will also work.