Format of Multiprocessor Specification Floating Pointer structure

Offset  Size    Description     (Table M080)
 00h  4 BYTEs  signature "_MP_"
 04h   DWORD   physical address of MP configuration table (see #M081)
       00000000h if no configuration table
 08h   BYTE    length of this structure in paragraphs (currently 01h)
 09h   BYTE    revision of MP specification supported
       01h = v1.1
       04h = v1.4
 0Ah   BYTE    checksum (8-bit sum of entire structure, including this
         byte, must equal 00h)
 0Bh   BYTE    MP feature byte 1: system configuration type
       00h: MP configuration table present
       nonzero: default configuration implemented by system
 0Ch   BYTE    MP feature byte 2
       bit 7: IMCR present
       bits 6-0: reserved (0)
 0Dh  3    BYTEs   MP feature bytes 3-5 (reserved, must be 00h)