Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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     Select an instruction for more information.
 
     Instruction     Description
 
     MOVS            Move string data
     LODS            Load string operand
     STOS            Store string data
     SCAS            Scan string (compare to accumulator)
     CMPS            Compare strings
     INS             Input to string from port (186+)
     OUTS            Input string to port (186+)
 
     REP             Repeat string (instruction prefix)
     REPE/REPZ       Repeat while equal/zero
     REPNE/REPNZ     Repeat while not equal/not zero
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