PUSHA/PUSHAD - Push All Registers onto Stack  (80188+)

        Usage:  PUSHA
                PUSHAD  (386+)
        Modifies flags: None

        Pushes all general purpose registers onto the stack in the following
        order: (E)AX, (E)CX, (E)DX, (E)BX, (E)SP, (E)BP, (E)SI, (E)DI.  The
        value of SP is the value before the actual push of SP.

                                 Clocks                 Size
        Operands         808x  286   386   486          Bytes

        none              -     19    24    11            1

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