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Saturday, December 11, 2010

8086 Microprocessor Instruction Set


This is the Instruction set of Intel- 8086 Microprocessor.

Here, the instructions are classified and grouped into categories to make it easy to understand and to remember.
 

DATA TRANSFER INSTRUCTIONS

GENERAL – PURPOSE BYTE OR WORD TRANSFER INSTRUCTIONS:

MOV (Move )
PUSH (Push data onto stack )
POP (Pop data from stack )
XCHG (Exchange data )
XLAT (Table look-up translation )

SIMPLE INPUT AND OUTPUT PORT TRANSFER INSTRUCTIONS:

IN (Input from port )
OUT (Output to port )

SPECIAL ADDRESS TRANSFER INSTRUCTIONS

LEA (Load Effective Address )
LDS (Load pointer using DS )
LES (Load ES with pointer )

FLAG TRANSFER INSTRUCTIONS:
LAHF (Load flags into AH register )
SAHF (Store AH into flags )
PUSHF (Push flags onto stack )
POPF (Pop data into flags register )

ADITION INSTRUCTIONS:

ADD (Add)
ADC (Add with carry )
INC (Increment by 1 )
AAA (ASCII adjust AL after addition )
DAA (Decimal adjust AL after addition )

SUBTSUBTRACTION INSTRUCTIONS:

SUB (Subtraction )
SBB (Subtraction with borrow )
DEC (Decrement by 1 )
NEG (Two's complement negation )
CMP (Compare operands )
AAS (ASCII adjust AL after subtraction )
DAS (Decimal adjust AL after subtraction )

MULTIPLICATION INSTRUCTIONS:

MUL (Unsigned multiply )
IMUL (Signed multiply )
AAM (ASCII adjust AX after multiplication )

DIVISION INSTRUCTIONS:

DIV (Unsigned divide )
IDIV (Signed divide )
AAD (ASCII adjust AX before division )
CBW (Convert byte to word )
CWD (Convert word to doubleword )

BIT MANIPULATION INSTRUCTIONS

LOGICAL INSTRUCTIONS:

NOT (Negate the operand, logical NOT)
AND (Logical AND)
OR (Logical OR)
XOR (Excludive BR)
TEST (Logical compare (AND))

SHIFT INSTRUCTIONS:

SHL (Shift Left (unsigned shift left))
SAL (Shift Arithmetically left (signed shift left))
SHR (Shift right (unsigned shift right))
SAR (Shift Arithmetically right (signed shift right))

PROGRAM EXECUTION TRANSFER INSTRUCTIONS

UNCONDITIONAL TRANSFER INSTRUCTIONS:

CALL (Call procedure )
RET (Return from procedure)
JMP (Jump)

CONDITIONAL TRANSFER INSTRUCTIONS (Jump if condition (Jxx)):
JA / JNBE
JAE / JNB
JB / JNAE
JBE / JNA
JC
JE / JZ
JG / JNLE
JGE / JNL


JL / JNGE
JLE / JNG
rof. Krishna JNC
JNE / JNZ
JNO
JNP / JPO
JNS
JO
JP / JPE
JS

ITERATION CONTROL INSTRUCTIONS:

LOOP (Loop control)
LOOPE / LOOPZ
LOOPNE / LOOPNZ
JCXZ/ JECXZ (Jump if register (E)CX is zero)

INTERRUPT INSTRUCTIONS:

INT (Call to interrupt)
INTO (Call to interrupt if overflow)
IRET (Return from interrupt)

PROCESS CONTROL INSTRUCTIONS


FLAG SET / CLEAR INSTRUCTIONS:

STC (Set carry flag )
CLC (Clear carry flag)
CMC (Complement carry flag)
STD (Set direction flag)
CLD (Clear direction flag)
STI (Set interrupt flag)
CLI (Clear interrupt flag)



EXTERNAL HARDWARE SYNCHRONIZATION INSTRUCTIONS:

HLT (halt CPU)
WAIT (Wait until not busy)
ESC (Escape)
LOCK (Lock Bus)
NOP (No operation)








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5 comments:

  1. tnanks for uploading these instructions set

    ReplyDelete
  2. thanks to give me a very true information about the 8086 instructions.

    ReplyDelete
  3. thanks to give me a very true information about the 8086mp instructions.

    ReplyDelete
  4. thanks to give me a very true information about the 8086 instructions.

    ReplyDelete