Considering the small size of typical RISC OS applications, we could probably reduce the size of the translation cache from 16MB to maybe 4MB or even less. But as long as there is no equivalent of SEGV and mmap, it does not help too much.
Running RISC OS under Linux/Qemu is probably especially useful on a fast x86 machine, but not on an Iyonix
Is it possible to support also 240x320 displays with RPCEmu? Because this is the only one I (and probably also others) have now, 480x640 is still quite rare.