HelpPC 2.10	Quick Reference Utility	Copyright 1991 David Jurgens
LOCK - Lock Bus        Usage:  LOCK                LOCK: (386+ prefix)        Modifies flags: None        This instruction is a prefix that causes the CPU assert bus lock        signal during the execution of the next instruction.  Used to        avoid two processors from updating the same data location.  The        286 always asserts lock during an XCHG with memory operands.  This        should only be used to lock the bus prior to XCHG, MOV, IN and        OUT instructions.                                 Clocks                 Size        Operands         808x  286   386   486          Bytes        none              2     0     0     1             1        - see Instruction Timing
Esc or Alt-X to exit	lock	Home/PgUp/PgDn/End ←↑↓→

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