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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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  IDIV               Signed divide
  IF                 Marks beginning of conditional statements
  IF1                Grants assembly on Pass 1
  IF2                Grants assembly on Pass 2
  IFB                Grants assembly if argument blank
  IFDEF              Grants assembly if name defined
  IFDIF              Grants assembly if arguments differ
  IFE                Marks beginning of conditional statements
  IFIDN              Grants assembly if arguments identical
  IFNB               Grants assembly if argument not blank
  IFNDEF             Grants assembly if name undefined
  IMUL               Signed multiply
  IN                 Input from port
  INC                Increment
  INCLUDE            Inserts source code from source file
  INCLUDELIB         Include library file
  INS                Input from port to string
  INSB               Input from port to string
  INSD               Input from port to string
  INSTR              Returns starting position of substring
  INSW               Input from port to string
  INT                Interrupt
  INTO               Interrupt on overflow
  IRET               Interrupt return
  IRP                Marks repeat block
  IRPC               Marks repeat block
                                    -♦-