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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

 ◄Detail► ◄Key► ◄Example►                    ◄Up► ◄Contents► ◄Index► ◄Back►
────────────────────────────────────────────────────────────────────────────
 
  Title:    Call Procedure                        Flags: O D I T S Z A P C
                                                         ═════════════════
  Syntax:   CALL dest                                         -none-
 
  See also: INVOKE, JMP, RET, PROC, PROTO
 
  Description:
 
     Calls a procedure. This instruction pushes the address of the next
     instruction onto the stack and jumps to the address specified by
     the operand. For NEAR calls, SP is decreased by 2, the offset (IP)
     is pushed, and the new offset is loaded into IP.
 
     For FAR calls, SP is decreased by 2, the segment (CS) is pushed,
     and the new segment is loaded into CS. Then SP is decreased by 2
     again, the offset (IP) is pushed, and the new offset is loaded
     into IP. A subsequent RET instruction can pop the address so that
     execution continues with the instruction following the call.
                                    -♦-