VMS Help MACRO, VAX MACRO Assembler, Vector Instructions, VSYNC  *Conan The Librarian (sorry for the slow response - running on an old VAX)

      Synchronize Vector Memory Access

    Format:

      VSYNCH

    Architecture

    Format
    opcode   regnum.rw
    opcodes

    A8FD    VSYNC     Synchronize Vector Memory Access

    vector_control_word
    None.
    exceptions

       None.

    operation
      CASE regnum   0:   VSYNC
        >0:   Reserved
      END

    Synchronize Vector Memory Access instructions that specify
    reserved values of the regnum operand produce UNPREDICTABLE
    results.