ISA and as a tool to check that the Power ISA Specification itself is
correct. For example, a python class
[SelectableInt](https://git.libre-soc.org/?p=openpower-isa.git;a=blob;f=src/openpower/decoder/selectable_int.py;hb=HEAD)
-has been created which understands IBM MSB0 ordering. This
+has been created which understands IBM MSB0 ordering. Even
+a RADIX MMU has been implemented, 100% in python using IBM-sponsored
+[gem5-experimental](https://github.com/power-gem5/gem5/blob/gem5-experimental/src/arch/power/radixwalk.cc) work as a guide. This
*deliberate and conscious* design choice to focus on readability
and understanding makes pypowersim extremely slow: an Intel i9 running
at 4.8 ghz is only capable of 2,500 instructions per second.