CODE CONVERSION

BINARY TO BCD CONVERSION

AIM:

To write an assembly language program for the code conversion of binary to BCD Using 8085.

APPARATUS REQUIRED:

            8085 kit, power chord

ALGORITHM:

1.      Start the program                                               

2.      Clear D and E register

3.      Load the data in memory location 4253 to the acc and compare the data with acc

4.      Jump on carry to the address 4112                

5.  Subtract the data 64 H from acc

6. Compare immediately OAH with the acc and jump on carry to address 411D

7. Subtract immediately OAH with accumulator. Increment D register         

      8. Jump to address 4112 move accumulator data to register C move data to accumulator

      9. Rotate left without carry by 4 numbers           

     10. Add data to Acc and store it in 4258

     11. Move the data to accumulator and it stored  

     12. Stop the program

PROGRAM: 

ADDRESS	LABEL	OPCODE	MNEMONICS	OPERAND	COMMENTS
4100		16,00	MVI	D, 00	Clear d register
4102		1E, 00	MVI	E, 00	Clear e register
4104		3A, 53,42	LDA	4253	Load data to acc
4107	HUND	FE, 64	CPI	64H	Compare data with acc
4109		DA, 12,41	JC	TEN	Jump on carry to adder
410C		D6, 64	SUI	64	Subtract data from acc
410E		1C	INR	E	Increment e register
410F		C3, 07,41	JMP	HUND	Jump to address
4112	TEN	FE, 0A	CPI	0AH	Compare data with acc
4114		DA, 1D, 41	JC	UNIT	Jump on carry to adder
4117		D6, 0A	SUI	0AH	Subtract data with acc
4119		14	INR	D	Increment d register
411A		C3, 12,41	JMP	TEN	Jump to address
411D	UNIT	4F	MOV	C, A	Move acc to c register
411E		7A	MOV	A, D	Move data to acc
411F		07	RLC		Rotate left without cy
4120		07	RLC		Rotate left without cy
4121		07	RLC		Rotate left without cy
4122		07	RLC		Rotate left without cy
4123		81	ADD	C	Add data to acc
4124		32,50,42	STA	4250	Store the result
4127		7B	MOV	A, E	Move data to acc
4128		32	STA, 51,42	4251	Store the result
412B		76	HLT		stop the process

INPUT:         4253 – FF                 OUTPUT:     4250 – 55      4251 – 02

 RESULT:

 Thus the assembly language program for Binary to BCD code conversion is executed   and the results are verified.