qa.hlp (Table of Contents; Topic list)
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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
String Operations
   ◄Instruction Summary►  ◄Contents►  ◄Index►
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In all the string instructions, DS:SI points to the source operand and
ES:DI points to the destination operand.
 
Mnemonic      Name
MOVS          Move String Data
LODS          Load String Operand
STOS          Store String Data
SCAS          Scan String (compares to accumulator)
CMPS          Compare Strings
INS           Input to String from Port (80186/286/386 only)
OUTS          Input String to Port (80186/286/386 only)
REP           Repeat String (instruction prefix)
REPE/REPZ     Repeat While Equal
REPNE/REPNZ   Repeat While Not Equal
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