SMSW            Store Machine Status Word            Flags: Not altered

SMSW destination                                     CPU: 286+ p

        Logic   destination ← MSW

    SMSW stores the machine status word (MSW register) in the 16-bit
    destination.


    Note
    The MSW register is part of control register zero (CR0).
    80386-based programs should use a MOV instruction to read the
    contents of MSW (e.g. mov eax,CR0).


    Opcode      Format
    0F 01 /4    SMSW r/m16


    Length and timing
    Operands    Bytes   8088    186     286     386     486     Pentium
    r16          3                       2       2       2       4   NP
    mem16      3+d(0-2)                  3       3       3       4   NP