qa.hlp (Table of Contents; Topic list)
LOCK
   Summary  Detail  Key to Flags
──────────────────────────────────────────────────────────────────────────────
 
Lock the Bus                                     Flags:  O D I T S Z A P C
                                                         ═════════════════
Syntax:  LOCK instruction
 
  Locks out other processors during execution of the next instruction.
  This instruction is a prefix. It usually precedes an instruction that
  modifies a memory location that another processor might attempt to
  modify at the same time. See Intel documentation for details on multi-
  processor environments.
                                    -♦-