数据传输指令是在微处理器中传输数据的指令。它们也称为复制指令。
下表显示了数据传输指令列表：
| OPCODE | OPERAND | EXPLANATION | EXAMPLE |
|---|---|---|---|
| MOV | D, S | D = S | MOV AX, [SI] |
| PUSH | D | pushes D to the stack | PUSH DX |
| POP | D | pops the stack to D | POP AS |
| PUSHA | none | put all the registers into the stack | PUSHA |
| POPA | none | gets words from the stack to all registers | POPA |
| XCHG | D, S | exchanges contents of D snd S | XCHG [2050], AX |
| IN | D, S | copies a byte or word from S to D | IN AX, DX |
| OUT | D, S | copies a byte or word from D to S | OUT 05, AL |
| XLAT | none | translates a byte in AL using a table in the memory | XLAT |
| LAHF | none | loads AH with the lower byte of the flag register | LAHF |
| SAHF | none | stores AH register to lower byte of the flag register | SAHF |
| PUSHF | none | copies the flag register at the top of the stack | PUSHF |
| POPF | none | copies a word at the top of the stack to the flag register | POPF |
D代表目的地，S代表来源。
D和S可以是寄存器，数据或存储器地址。