Syntax:
FPU NONE
FPU MC68881
FPU MC68882
FPU MC68040
Operation: Use instructions valid for a given floating point
unit. All subsequent instructions will be checked to by
the assembler for compatibility with the given FPU. An
error will occur for any incompatible commands.
Note that floating-point instructions are not yet implemented, making
this instruction, for the time being, useless.