LEA
LOAD EFFECTIVE
ADDRESS
LEA
Operation: | Flags Affected: |
(REG) - EA | None |
Description:
LEA destination,source
LEA (load effective address) transfers the off- set of the source operand (rather than its value) to the destination operand. The source operand must be a memory operand, and the destination operand must be a
register. LEA does not affect any flags. The XLAT and string instructions assume that cer- tain registers point to operands; LEA can be used to load these registers (e.g., loading BX with the address of the translate table used by the XLAT instruction).
Encoding:
11 00011 01 1mod reg rIm 1
if mod = 11 then undefined operation
LEA Operands | Clocks | Transfers | Bytes LEA Coding Example |
reg16, mem16 | 2+EA | - |
