8086
Table 2. Instruction Set Summary
Mnemonic and
Description
Instruction Code
DATA TRANSFER |
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MOV e Move: | 7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 |
Register/Memory to/from Register | 1 0 0 0 1 0 d w | mod reg r/m |
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Immediate to Register/Memory | 1 1 0 0 0 1 1 w | mod 0 0 0 r/m | data | data if w e 1 |
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Immediate to Register | 1 0 1 1 w reg | data | data if w e 1 |
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Memory to Accumulator | 1 0 1 0 0 0 0 w |
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Accumulator to Memory | 1 0 1 0 0 0 1 w |
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Register/Memory to Segment Register | 1 0 0 0 1 1 1 0 | mod 0 reg r/m |
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Segment Register to Register/Memory | 1 0 0 0 1 1 0 0 | mod 0 reg r/m |
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PUSH e Push: |
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Register/Memory | 1 1 1 1 1 1 1 1 | mod 1 1 0 r/m |
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Register | 0 1 0 1 0 reg |
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Segment Register | 0 0 0 reg 1 1 0 |
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POP e Pop: |
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Register/Memory | 1 0 0 0 1 1 1 1 | mod 0 0 0 r/m |
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Register | 0 1 0 1 1 reg |
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Segment Register | 0 0 0 reg 1 1 1 |
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XCHG e Exchange: |
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Register/Memory with Register | 1 0 0 0 0 1 1 w | mod reg r/m |
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Register with Accumulator | 1 0 0 1 0 reg |
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IN e Input from: |
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Fixed Port | 1 1 1 0 0 1 0 w | port |
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Variable Port | 1 1 1 0 1 1 0 w |
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OUT e Output to: |
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Fixed Port | 1 1 1 0 0 1 1 w | port |
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Variable Port | 1 1 1 0 1 1 1 w |
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XLAT e Translate Byte to AL |
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1 1 0 1 0 1 1 1 |
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LEA e Load EA to Register | 1 0 0 0 1 1 0 1 | mod reg r/m |
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LDS e Load Pointer to DS | 1 1 0 0 0 1 0 1 | mod reg r/m |
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LES e Load Pointer to ES | 1 1 0 0 0 1 0 0 | mod reg r/m |
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LAHF e Load AH with Flags | 1 0 0 1 1 1 1 1 |
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SAHF e Store AH into Flags | 1 0 0 1 1 1 1 0 |
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PUSHF e Push Flags | 1 0 0 1 1 1 0 0 |
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POPF e Pop Flags | 1 0 0 1 1 1 0 1 |
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Mnemonics ' Intel, 1978
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