16-BIT DIVISION

16-BIT DIVISION

AIM:

To write an ALP for division of two 16-bit Numbers.

APPARATUS REQUIRED:

                                    8085 kit, power chord

ALGORITHM:

1.      Start the program

2.      Load the dividend in HL register pair.

3.      Load the divisor in BE register pair.

4.      Move the content of L register to A register.

5.      Subtract C register.

6.      Move the content of A register to L register.

7.      Move the content of H register to A register.

8.      Subtract A with borrow.

9.      Check for carry and increment the HL register pair.

10. Add B with A and carry.

11. Exchange HL with DE register pair.

12. Store the result in HL register pair.

13. Stop the process.

PROGRAM:

Address	Label	Opcode	Mnemonic	Operand	Comments
4200		21,3B,AF	LXI	H,AF3B	Load the dividend
4203		01,CB,3A	LXI	B,3ACB	Load the divisor
4206		11,00,00	LXI	D,0000	Clear the DE reg pair
4209	NEXT	7D	MOV	A,L	Move the content of L register to A register
420A		91	SUB	C	Subtract C register
420B		6F	MOV	L,A	Move the content of A register to L register
420C		7C	MOV	A,H	Move the content of H register to A register
420D		98	SBB	B	Subtract A with Borrow.
420E		67	MOV	H,A	Move the content of A register to H register
420F		DA,16,42	JC	OVER	Check for carry
4212		13	INX	D	If no carry, increment the DE register pair.
4213		C3,09,42	JMP	NEXT	Jump to the specified address.
4216	OVER	7D	MOV	A,L	Move the content of L register to A register
4217		81	ADD	C	Add the content of C register with A
4218		6F	MOV	L,A	Move the content of A register to L register
4219		7C	MOV	A,H	Move the content of H register to A register
421A		88	ADC	B	Add the content of B with A and carry.
421B		67	MOV	H,A	Move the content of A register to H register
421C		22,00,45	SHLD	4500	Store the result in HL reg pair.
421F		EB	XCHG		Exchange HL pair with DE pair
4220		22,02,42	SHLD	4502	Store the result in HL reg pair
4223		76	HLT		Stop the process.

INPUT:                                                                           OUTPUT:

AF3B (IN HL PAIR)                                                        4500: A5

                                                                                          4501: 39 

3ACB (IN BC PAIR)                                                        4502: 02

                                                                                          4503: 00

RESULT:

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