Function            cpu_id - identify the cpu

  Syntax              int cpu_id(void);

  Prototype in        chiphk.h

  Remarks             cpu_id does some opcode magic to identify the cpu.
                      Currently identified chips are the 8088/8086,
                      80286, 80386 and the NEV V20/V30.

  Return value        returns a value identifying the cpu. See chiphk.h
                      for further details.

  Note                Other (not 88/86, 286, 386 or V20/V30) chips will
                      not be identified correctly, and will probably be
                      interpreted as an NEC cpu.

  See also            machine_id(), ndp_id()