Library /sys$common/syshlp/dbg$help.hlb DEBUG, STEP, Qualifiers, /INSTRUCTION  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /INSTRUCTION
       /INSTRUCTION=(opcode[, . . . ])

    When you do not specify an opcode, executes the program to the
    next instruction. STEP/INSTRUCTION has the same effect as SET
    BREAK/TEMPORARY/INSTRUCTION;GO.

    On VAX processors, you can specify one or more opcodes; the
    debugger executes the program to the next instruction whose
    opcode is in the list. The following commands are equivalent:

    DBG> STEP/INSTRUCTION=(opcode[, . . . ])
    DBG> SET BREAK/TEMPORARY/INSTRUCTION=(opcode[, . . . ]);GO

    On VAX processors, you can specify vector instructions; do not
    include an instruction qualifier (/UNALIGNED_DATA, /VECTOR_
    INSTRUCTION, /MODIFY, /0, or /1) with the instruction mnemonic.