BCD CODE TO BINARY

AIM:

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

APPARATUS REQUIRED:

            8085 kit, power chord

ALGORITHM:

1.      Start the program           

2.      Load the data from acc from memory and move the acc value to E register

3.      Clear LSB of accumulator and rotate the acc value

4.      Move the acc value to B register        

5.      Perform EX-OR between acc value and acc value

6.      Move the data A to C register and add it with acc   

7.      Decrement the C register         

8.      Jump on no zero to address 410E

9.      Move Ale to B register and move E to acc

10. Clear MSB of acc, add the acc with B and store it in 4250

11. Stop the program

PROGRAM:     

ADDRESS	LABEL	OPCODE	MNEMONICS	OPERAND	COMMENTS
4100		3A, 00,42	LDA	4200	Load data to acc
4103		5F	MOV	E, A	Move acc to e reg
4104		E6, F0	ANI	F0	Clear LSB of acc
4106		07	RLC		Rotate left without cy
4107		07	RLC		Rotate left without cy
4108		07	RLC		Rotate left without cy
4109		07	RLC		Rotate left without cy
410A		47	MOV	B, A	Move acc to b reg
410B		AF	XRA	A	EX-OR acc with acc
410C		0E, 0A	MVI	C, 0A	Move data to c reg
410E	REP	80	ADD	B	Add data to acc
410F		0D	DCR	C	Decrement c register
4110		C2, 0E, 41	JNZ	REP	Jump on no zero to add
4113		47	MOV	B, A	Move acc to b reg
4114		7B	MOV	A, E	Move data to acc
4115		E6, 0F	ANI	0F	Clear MSB of acc
4117		80	ADD	B	Add b register
4118		32,50,42	STA	4250	Store the result
411B		76	HLT		Stop the process

INPUT:         4200 – 32                                         

OUTPUT:     4250 - 20

RESULT:

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