1 - All instructions that modify the condiction codes should be replaced by
2 inlince assembly code for the specific target processor.
4 - the instruction code word should not be passed to the Group functions
5 but written into the M68k structure. This should speed it up.
7 - the register field and mode field should not be passed to the addressing
8 function but rather taken from th eM68k structure where the current
9 instruction word can be found.