16-BIT MULTIPLICATION

16-BIT MULTIPLICATION

AIM:

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

APPARATUS REQUIRED:

 8085 kit, power chord.

ALGORITHM:

1. Start the program

2. Load the data to HL pair register

3. Exchange the content of HL pair and DE

4. Load the data to HL pair register

5. Multiply the content of E register with accumulator

6. Store the content of accumulator to 5100

7. Move content of H reg to accumulator

8. Multiply the content of accumulator to 5101.

9. Stop the program

PROGRAM:

Address	Label	Opcode	Mnemonic	Operand	Comments
4100		2A,00,42	LHLD	4200H	Load the data1 to hl register
4103		F9	SPHL		Save the 1st data in sp
4104		2A 02 42	LHLD	4202H	Load the data2 in the hl pair
4107		EB	XCHG		Save 2nd data in sp
4108		21 00 00	LXI	H, 0000H	Clear hl pair
410B		21 00 00	LXI	B, 0000H	Clear be pair
410E	Next	39	DAD	SP	Add sp to sum HL
410F		D2 13 41	JNC	AHEAD	Jump on no carry to address
4112		D3	INX	B	If carry=1 of BE pair
4113	Ahead	1B	DCX	D	Stop the process
4114		7B	MOV	A,E	Move E-reg to A-reg
4115		B2	ORA	D	Check for zero in de pair and logically OR
4116		C2 0E 41	JNZ	NEXT	Jump on no carry to address
4119		22 04 42	SHLD	4204H	Store the result
411C		69	MOV	A,C	Move C-reg to A–reg
411D		60	MOV	H,B	Move B-reg to H-reg
411E		22 06 42	SHLD	4206H	Store the result
4121		76	HLT		Stop the process

INPUT:         4200H: 05H  4201H:00H              OUTPUT: 4204H: 0FH

4202H: 03H  4203H:00H                                                                                                                                    4206H:00H

                                                                             

RESULT:

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