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8085 program to multiply two bcd numbers

Statement: Write an assembly language program to multiply 2 BCD numbers

8085 program to multiply two bcd numbers

MVI C, Multiplier : Load BCD multiplier
MVI B, 00 : Initialize counter
LXI H, 0000H : Result = 0000
MVI E, multiplicand : Load multiplicand
MVI D, 00H : Extend to 16-bits
BACK: DAD D : Result Result + Multiplicand
MOV A, L : Get the lower byte of the result
ADI, 00H
DAA : Adjust the lower byte of result to BCD.
MOV L, A : Store the lower byte of result
MOV A, H : Get the higher byte of the result
ACI, 00H
DAA : Adjust the higher byte of the result to BCD
MOV H, A : Store the higher byte of result.
MOV A, B : [Increment
ADI 01H : counter
DAA : adjust it to BCD and
MOV B,A : store it]
CMP C : Compare if count = multiplier
JNZ BACK : if not equal repeat
HLT : Stop
________________________________________________________________________

List of all Microprocessor 8085 all program with examples

So Guys here are the list of 8085 programs for beginners who are currently learning 8085 microprocessor and also for those who are looking for8085 microprocessor programs pdf here is all and you can collect it. In this you can get access to microprocessor 8085 programming tutorial which are all tutored and not only this in this we have microprocessor 8085 programs with opcode.

• 8085 program for 2's complement of a number
• 8085 program to find one's complement of a number
• 8085 Program to Add contents of two memory locatio...
• 8085 Program to Exchange contents of memory locati...
• 8085 Program to store 8 bit data in memory of 8085...
• 8085 Program to find square of a number in 8085
• 8085 Program to find factorial of a number in 8085...
• BCD to binary conversion in 8085
• BCD to HEX conversion in 8085 Micoprocessor
• How to Find Subtraction of two 8 bit numbers 8085 ...
• ADDITION OF TWO 8 BIT NUMBERS
• How to Find 8085 division of two 8 bit numbers
• How to Find LARGEST NUMBER IN AN ARRAY OF DATA
• How to find smallest number in array in 8085
• How to arrange array in ascending order in 8085
• How to multiply two numbers in 8085 , 8085 multipl...
• How to find gcd of two numbers in 8085, 8085 GCD P...
• How to add two 16 bit numbers in 8085

8085 program for 2's complement of a number

8085 program for 2's complement of a number

Finding Two's complement of a number, 2's complement program in 8085
2's complement of 8 bit number in 8085

Statement: Find the 2's complement of the number stored at memory location 4200H and store the complemented number at memory location 4300H.

Sample problem:

       (4200H) = 55H
               Result = (4300H) = AAH + 1 = ABH

Source program:

LDA 4200H            : Get the number
CMA                      : Complement the number
ADI, 01H               : Add one in the number
STA 4300H            : Store the result
HLT                       : Terminate program execution
 

8085 program to find one's complement of a number

8085 program to find one's complement

Finding one's complement of a number

Statement: Find the l's complement of the number stored at memory location 4400H and store the complemented number at memory location 4300H.

Sample problem:                                                                       

       (4400H) = 55H
               Result = (4300B) = AAB                                       
Source program:                                                       

LDA 4400B  : Get the number
CMA            : Complement number
STA 4300H  : Store the result
HLT              : Terminate program execution

8085 Program to Add contents of two memory locations in 8085 Processor

Add contents of two memory locations
Statement: Add the contents of memory locations 40001H and 4001H and place the result in the memory locations 4002Hand 4003H.
Sample problem:       

       (4000H) = 7FH
       (400lH)  = 89H
Result    = 7FH + 89H = lO8H
       (4002H) = 08H
       (4003H) = 0lH

Source program:

       LXI H, 4000H  : HL Points 4000H
       MOV A, M       : Get first operand
       INX H             : HL Points 4001H
       ADD M           : Add second operand
       INX H             : HL Points 4002H
       MOV M, A       : Store the lower byte of result at 4002H
       MVI A, 00       : Initialize higher byte result with 00H
       ADC A           : Add carry in the high byte result
       INX H             : HL Points 4003H
       MOV M, A       : Store the higher byte of result at 4003H
       HLT               : Terminate program execution

8085 Program to Exchange contents of memory locations 8085 Microprocessor

Program to Exchange contents of memory locations 8085 Microprocessor

Statement: Exchange the contents of memory locations 2000H and 4000H

Program 1:

 LDA 2000H : Get the contents of memory location 2000H into accumulator
 MOV B, A    : Save the contents into B register
 LDA 4000H : Get the contents of memory location 4000Hinto accumulator
 STA 2000H : Store the contents of accumulator at address 2000H
 MOV A, B    : Get the saved contents back into A register
 STA 4000H : Store the contents of accumulator at address 4000H

Program 2:
LXI H 2000H          : Initialize HL register pair as a pointer to memory location 2000H.
LXI D 4000H         : Initialize DE register pair as a pointer to memory location 4000H.
MOV B, M     : Get the contents of memory location 2000H into B register.
LDAX D        : Get the contents of memory location 4000H into A register.
MOV M, A     : Store the contents of A register into memory location 2000H.
MOV A, B     : Copy the contents of B register into accumulator.
STAX D        : Store the contents of A register into memory location 4000H.
HLT              : Terminate program execution.

In Program 1, direct addressing instructions are used, whereas in Program 2, indirect addressing instructions are used.

8085 Program to store 8 bit data in memory of 8085 microprocessor

Program 1:

MVI A, 52H  : Store 32H in the accumulator
STA 4000H  : Copy accumulator contents at address 4000H
HLT              : Terminate program execution

Program 2:

LXI H           : Load HL with 4000H
MVI M                   : Store 32H in memory location pointed by HL register pair (4000H)
HLT              : Terminate program execution

The result of both programs will be the same. In program 1 direct addressing instruction is used, whereas in program 2 indirect addressing instruction is used.

8085 Program to find square of a number in 8085

Program to find square of a number in 8085

LXI H, 6200H        : Initialize lookup table pointer
               LXI D, 6100H                : Initialize source memory pointer
               LXI B, 7000H        : Initialize destination memory pointer
       BACK: LDAX D                : Get the number
               MOV L, A                : A point to the square
               MOV A, M                : Get the square
               STAX B                : Store the result at destination memory location
               INX D                : Increment source memory pointer
               INX B                        : Increment destination memory pointer
               MOV A, C
               CPI 05H                : Check for last number
               JNZ BACK                : If not repeat
               HLT                        : Terminate program execution

8085 Program to find factorial of a number in 8085

Program to find factorial of a number in 8085

Here is a program to find factorial of a number in 8085

MVI B, 03H
MOV C, B
DCR C
LOOP1:
MOV E, C
SUB A
LOOP2:
ADD B
DCR E
JNZ LOOP2
MOV B, A
DCR C
JNZ LOOP1
STA 8000H
HLT

Advanced Code

MEMORY	LABEL	MNEMONIC	HEX CODE	COMMENT
4200		LXI H,4100	21	Load the number to the HL pair
4201			00
4202			41
4203		MVI C,M	4E	Copy the number to register C
4204		MVI E,M	5E	Copy memory content to E
4205		DCR E	1D	Decrement E
4206	LOOP1	INX H	23	Increment memory
4207		DCR C	0D	Decrement C
4208		MOV M,C	71	Copy content of C to memory
4209		JNZ LOOP1	C2	Jump on non-zero to label LOOP1
420A			06
420B			42
420C		LXI H,4100	21	Load the number whose factorial is to be found in HL pair
420D			00
420E			41
420F	LOOP2	MOV A,M	7E	Copy memory content to accumulator
4210		INX H	23	Increment memory
4211		MOV B,M	46	Copy memory content to B
4212		MOV C,A	4F	Copy accumulator content to C
4213		MVI A,00	3E	Initialize A with 0
4214			00
4215	GO	ADD B	80	[A] ß [A] + [B]
4216		DCR C	0D	Decrement C
4217		JNZ GO	C2	Jump on non-zero to label GO
4218			15
4219			42
421A		MOV M,A	77	Copy accumulator content to memory
421B		DCR E	1D	Decrement E
421C		JNZ LOOP2	C2	Jump on non-zero to label LOOP2
421D			0F
421E			42
421F		STA 4500	32	Store accumulator content to memory
4220			00
4221			45
4222		HLT	76	Program ends

BCD to binary conversion in 8085

bcd to binary conversion in 8085bcd to binary conversion in 8085

Sample Problem:
(2200H) = 67H
(2300H) = 6 x OAH + 7 = 3CH + 7 = 43H
Source Program:
       LDA 2200H                : Get the BCD number
       MOV B, A                : Save it
       ANI OFH                : Mask most significant four bits
       MOV C, A                : Save unpacked BCDI in C register
       MOV A, B                : Get BCD again
       ANI FOH                : Mask least significant four bits
       RRC                        : Convert most significant four bits into unpacked BCD2
       RRC
       RRC
       RRC
       MOV B, A                : Save unpacked BCD2 in B register
       XRA A                        : Clear accumulator (sum = 0)
       MVI D, 0AH                : Set D as a multiplier of 10
Sum:   ADD D                : Add 10 until (B) = 0
       DCR B                        : Decrement BCD2 by one
       JNZ SUM                : Is multiplication complete? i if not, go back and add again
       ADD C                : Add BCD1
       STA 2300H                : Store the result
       HLT                        : Terminate program execution

BCD to HEX conversion in 8085 Micoprocessor

bcd to hex conversion in 8085

Algorithm
1. Initialize memory pointer to 4150 H
2. Get the Most Significant Digit (MSD)
3. Multiply the MSD by ten using repeated addition
4. Add the Least Significant Digit (LSD) to the result obtained in previous step
5. Store the HEX data in Memory

Program

     LXI H,5000
     MOV A,M      ;Initialize memory pointer
     ADD A        ;MSD X 2
     MOV B,A      ;Store MSD X 2
     ADD A        ;MSD X 4
     ADD A        ;MSD X 8
     ADD B        ;MSD X 10
     INX H        ;Point to LSD
     ADD M        ;Add to form HEX
     INX H
     MOV M,A      ;Store the result
     HLT

Result
Input:
Data 0: 02H in memory location 5000
Data 1: 09H in memory location 5001
Output:
Data 0: 1DH in memory location 5002

How to Find Subtraction of two 8 bit numbers 8085 Microprocessor

SUBTRACTION OF TWO 8 BIT NUMBERS | How to Find Subtraction of two 8 bit numbers 8085 Microprocessor

AIM:
     To perform the subtraction of two 8 bit numbers using 8085.
   
ALGORITHM:
     1. Start the program by loading the first data into Accumulator.
        Move the data to a register (B register).
     2. Get the second data and load into Accumulator.
     3. Subtract the two register contents.
     4. Check for carry.
     5. If carry is present take 2’s complement of Accumulator.
     6. Store the value of borrow in memory location.
     7. Store the difference value (present in Accumulator) to a memory
     8. location and terminate the program.
 
PROGRAM:
          MVI C, 00I Initialize C to 00
          LDA 4150     Load the value to Acc.
          MOV B, A    Move the content of Acc to B register.
          LDA 4151     Load the value to Acc.
          SUB B
          JNC LOOP   Jump on no carry.
          CMA           Complement Accumulator contents.
          INR A         Increment value in Accumulator.
          INR C         Increment value in register C
LOOP: STA 4152   Store the value of A-reg to memory address.
          MOV A, C    Move contents of register C to Accumulator.
          STA 4153    Store the value of Accumulator memory address.
          HLT         Terminate the program.
OBSERVATION:
            Input: 06 (4150)
                    02 (4251)
            Output: 04 (4152)
                    01 (4153)
                 
RESULT:
     Thus the program to subtract two 8-bit numbers was executed