Using RAD as co-processor

[odflor]

Hi:
In the project description in one place says:

..."other things that have already been tested (but not yet included here) are, for example, MOS 6510/8500 emulation (incl. turbo mode) or using the RAD as a (co-)processor (in fact the menu runs on the ARM CPU only)."...

Where I can find "these" things that I can experiment to use RAD as c128/c64 co-proccesor?

Thanks and
Best Regards