Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
LSL Instruction
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  Title:    Load Segment Limit                    Flags: O D I T S Z A P C
            80286-80486 Protected Only                   ═════════════════
                                                                   ±
  Syntax:   LSL dest,src
 
  See also: .286
 
  Description:
 
     Loads the segment limit of a selector into a specified register.
     The source operand must be a register or memory operand containing
     a selector. The destination operand must be a register that will
     receive the segment limit if the selector is valid and visible at
     the current privilege level. The zero flag is set if the segment
     limit is transferred, or cleared if it is not.
 
     See Intel documentation for details on selectors, segment limits,
     and other protected-mode concepts.
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