POP - Pop Word off Stack
        Usage:  POP     dest
        Modifies flags: None
        Transfers word at the current stack top (SS:SP) to the destination
        then increments SP by two to point to the new stack top.  CS is not
        a valid destination.
                                 Clocks                 Size
        Operands         808x  286   386   486          Bytes
        reg16             8     5     4     4             1
        reg32             4     -     -     4             1
        segreg            8     5     7     3             1
        mem16           17+EA   5     5     6            2-4
        mem32             5     -     -     6            2-4
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