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INSD       Input Doubleword String From Port (386)   Flags: O D I T S Z A P C

INSD

           Logic:          ES:DI . doubleword from source port
                           if DF = 0 then
                               DI . DI + 4
                           else
                               DI . DI - 4

     The INSD instructions let you read a doubleword string from a port on
     the 386. The destination string is pointed to by ES:DI. The input port
     number must be in DX. If the direction flag is set, DI is decremented. If
     it is not set, DI is incremented.

  --------------------------------------------------------------------------
   Operands                   Clocks   Transfers  Bytes  Example
   INSD                       5            4        1    INSD
  --------------------------------------------------------------------------

        Note:          This instruction is usually used with a REP
                       prefix. Load CX with the number of times to repeat
                       the instruction. You can only use INSD on the 386.