16-BIT ARITHMETIC OPERATION

16-BIT ARITHMETIC OPERATION

            16-BIT ADDITION

AIM:

            To write an assembly language program for the addition of two 16 – bit numbers using 8085.

APPARATUS REQUIRED:

                                                8085 kit, power chord

ALGORITHM:

1.      Start the program     

2.      Clear the B-register 

3.      Load the data to HL pair register

4.      Exchange the content of HL and DE        

5.      Load the data to HL pair register            

6.      Add the content of HL and De pair 

7.      Jump on no carry to step – 9

8.      Increment the content pf B-register

9.      Store the content of HL pair to the address 5504

10. Store the content of B-register

11. Stop the program

PROGRAM:  

ADDRESS	LABEL	OPCODE	MNEMONICS	OPERAND	COMMENTS
4500		06,00	MVI	B, 00	Clear b register
4502		2A, 00,55	LHLD	5500	Load data1 to hl register
4505		EB	XCHG		Move the data in de to hl register
4506		2A, 02,55	LHLD	5502	Load the data2 to hl pair
4509		19	DAD	D	Add the content of the hl and de pair
450A		D2, 0E, 45	JNC	LOOP	Jump on no carry to an address
450D		04	INR	B	Increment the b register
450E	LOOP	22,04,55	SHLD	5504	Store the result
4511		78	MOV	A, B	Move carry to b register.
4512		32,06,55	STA	5506	Store the carry.
4515		76	HLT		Stop the process.

INPUT:         5500 – 03      5501 – FF      5502 – 03      5503 – EF      5504 – FE

OUTPUT:     5505 – 06 (Result),             5506 – 01(carry)

RESULT:

Thus the assembly language program for 16-bit addition is executed and the results are verified.