8086/8088 Instruction Set Architecture (ISA)

The original 8086/8088 processor instructions:

• AAA
  ASCII Adjust After Addition
• AAD
  ASCII Adjust AX Before Division
• AAM
  ASCII Adjust AX After Multiply
• AAS
  ASCII Adjust AL After Subtraction
• ADC
  Add with Carry
• ADD
  Add
• AND
  Logical AND
• CALL
  Call Procedure
• CBW
  Convert Byte to Word
• CLC
  Clear Carry Flag
• CLD
  Clear Direction Flag
• CLI
  Clear Interrupt Flag
• CMC
  Complement Carry Flag
• CMP
  Compare Two Operands
• CMPS/CMPSB/CMPSW
  Compare String Operands
• CWD
  Convert Word to Doubleword
• DAA
  Decimal Adjust AL after Addition
• DAS
  Decimal Adjust AL after Subtraction
• DEC
  Decrement by 1
• DIV
  Unsigned Divide
• HLT
  Halt
• IDIV
  Signed Divide
• IMUL
  Signed Multiply
• IN
  Input from Port
• INC
  Increment by 1
• INT n/INTO/INT 3
  Call to Interrupt Procedure
• IRET
  Interrupt Return
• Jcc (JA, JAE, JB, JBE, JC, JCXZ, JE, JG, JGE, JL, JLE, JNA, JNAE, JNB, JNBE, JNC, JNE, JNG, JNGE, JNL, JNLE, JNO, JNP, JNS, JNZ, JO, JP, JPE, JPO, JS, JZ)
  Jump if Condition Is Met
• JMP
  Jump
• LAHF
  Load Status Flags into AH Register
• LDS/LES
  Load Far Pointer
• LEA
  Load Effective Address
• LOCK
  Assert LOCK# Signal Prefix
• LODS/LODSB/LODSW
  Load String
• LOOP/LOOPE/LOOPNE/LOOPNZ/LOOPZ
  Loop According to ECX Counter
• MOV
  Move
• MOV
  Move to/from Control Registers
• MOV
  Move to/from Debug Registers
• MOVS/MOVSB/MOVSW
  Move Data from String to String
• MUL
  Unsigned Multiply
• NEG
  Two’s Complement Negation
• NOP
  No Operation
• NOT
  One’s Complement Negation
• OR
  Logical Inclusive OR
• OUT
  Output to Port
• POP
  Pop a Value from the Stack
• POPF
  Pop Stack into EFLAGS Register
• PUSH
  Push Word, Doubleword or Quadword Onto the Stack
• PUSHF
  Push EFLAGS Register onto the Stack
• RCL/RCR/ROL/ROR
  Rotate
• REP/REPE/REPZ/REPNE/REPNZ
  Repeat String Operation Prefix
• RET/RETN/RETF
  Return from Procedure
• SAHF
  Store AH into Flags
• SAL/SAR/SHL/SHR
  Shift
• SBB
  Integer Subtraction with Borrow
• SCAS/SCASB/SCASW
  Scan String
• STC
  Set Carry Flag
• STD
  Set Direction Flag
• STI
  Set Interrupt Flag
• STOS/STOSB/STOSW
  Store String
• SUB
  Subtract
• TEST
  Logical Compare
• WAIT
  Wait
• XCHG
  Exchange Register/Memory with Register
• XLAT/XLATB
  Table Look-up Translation
• XOR
  Logical Exclusive OR