[RF_Savage]

It has been done previously[1] so it is definitely doable. Especially when there's some nice room for improvement, as the linked cpu runs at 500kHz.

There's also an additional project[2], but it seems stalled with no progress during the past few years.

1. https://github.com/pineapple-one/about

2. https://hackaday.com/2018/02/09/a-risc-v-that-the-rest-of-us...