Brian:

Please do tell us what opcodes change due to register bank settings changing. I don't know if there really is such a case. The whole idea of register banks is that code written to use registers has no regard for which register bank is selected.

Now on the other hand if the code that someone writes tries to work around the instruction set and intermix register accesses with absolute accesses to the underlying internal RAM addresses that that is another thing again. Here this is a problem for the PROGRAMMER to worry about how he/she is shooting themselves in the foot and not an ASSEMBLER problem.

Michael Karas