1. A computer system allowing a symmetric multiprocessor computer system to emulate an asymmetric Systempro multiprocessor computer system, the computer system comprising: a symmetric multiprocessor computer system, said computer system including first and second microprocessors having internal cache systems and advanced programmable interrupt controllers adapted for multiprocessor operation and including an external cache system; means for providing emulation registers at the same locations as the multiprocessor specific registers in the Systempro computer system; and means for adapting specific identical bits in said emulation registers to perform compatible operations to said first and second microprocessors.