SMSW - Store Machine Status Word (286+ privileged)

        Usage:  SMSW    dest
        Modifies flags: none

        Store Machine Status Word (MSW) into dest.

                                 Clocks                 Size
        Operands         808x  286   386   486          Bytes

        reg16             -     2     10    2             3
        mem16             -     3     3     3             5


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