[9fans] Retargeting 8{al}?

[Venkatesh Srinivas]

Hi,

I am working on a 32-bit microprocessor-on-an-FPGA; anyone know
what'd be involved in retargeting 8{al} (or friends) to a new 
CPU? Where is the line between what 8a and 8l do? (which is
responsible for the pseudoregisters? instruction selection?)
Thanks,
-- vs