Instruction set of 8086

1. DATA TRANSFER INSTRUCTIONS
2. ARITHMETIC INSTRUCTIONS
3. BIT MANIPULATION INSTRUCTIONS
4. STRING INSTRUCTIONS
5. PROGRAM EXECUTION TRANSFER INSTRUCTIONS
6. PROCESS CONTROL INSTRUCTIONS

1.DATA TRANSFER INSTRUCTIONS

The DATA TRANSFER INSTRUCTIONS are those, which transfers the DATA from any one source to any one destination.The datas may be of any type. They are again classified into four groups.They are:

GENERAL – PURPOSE BYTE OR WORD TRANSFER INSTRUCTIONS	SIMPLE INPUT AND OUTPUT PORT TRANSFER INSTRUCTION	SPECIAL ADDRESS TRANSFER INSTRUCTION	FLAG TRANSFER INSTRUCTIONS
MOV PUSH POP XCHG XLAT	IN OUT	LEA LDS LES	LAHF SAHF PUSHF POPF

2.ARITHMETIC INSTRUCTIONS

These instructions are those which are useful to perform Arithmetic calculations, such as addition, subtraction, multiplication and division.They are again classified into four groups.They are:

ADDITION INSTRUCTIONS	SUBTRACTION INSTRUCTIONS	MULTIPLICATION INSTRUCTIONS	DIVISION INSTRUCTIONS
ADD ADC INC AAA DAA	SUB SBB DEC NEG CMP AAS DAS	MUL IMUL AAM	DIV IDIV AAD CBW CWD

3.BIT MANIPULATION INSTRUCTIONS

These instructions are used to perform Bit wise operations.

LOGICAL INSTRUCTIONS	SHIFT INSTRUCTIONS	ROTATE INSTRUCTIONS
NOT AND OR XOR TEST	SHL / SAL SHR SAR	ROL ROR RCL RCR

4. STRING INSTRUCTIONS

The string instructions function easily on blocks of memory.They are user friendly instructions, which help for easy program writing and execution. They can speed up the manipulating code.They are useful in array handling, tables and records.

STRING INSTRUCTIONS

REP REPE / REPZ REPNE / REPNZ MOVS / MOVSB / MOVSW COMPS / COMPSB / COMPSW SCAS / SCASB / SCASW LODS / LODSB / LODSW STOS / STOSB / STOSW

5.PROGRAM EXECUTION TRANSFER INSTRUCTIONS

These instructions transfer the program control from one address to other address. ( Not in a sequence). They are again classified into four groups.They are:

UNCONDITIONAL TRANSFER INSTRUCTIONS	CONDITIONAL TRANSFER INSTRUCTIONS	ITERATION CONTROL INSTRUCTIONS	INTERRUPT INSTRUCTIONS
CALL RET JMP	JA / JNBE JAE / JNB JB / JNAE JBE / JNA JC JE / JZ JG / JNLE JGE / JNL JL / JNGE JLE / JNG JNC JNE / JNZ JNO JNP / JPO JNS JO JP / JPE JS	LOOP LOOPE / LOOPZ LOOPNE / LOOPNZ JCXZ	INT INTO IRET

6.PROCESS CONTROL INSTRUCTIONS

These instructions are used to change the process of the Microprocessor. They change the process with the stored information. They are again classified into Two groups.They are:

FLAG SET / CLEAR INSTRUCTIONS	EXTERNAL HARDWARE SYNCHRONIZATION INSTRUCTIONS
STC CLC CMC STD CLD STI CLI	HLT WAIT ESC LOCK NOP