The document contains several 8051 assembly language programs (ALPs) that perform various operations on arrays and numbers including counting negative/odd/even numbers in an array, finding averages, determining largest/smallest numbers, sorting arrays, and converting between binary, decimal, gray, ASCII and BCD codes.

1. 8051
Part III

2. 8051 ALP to find number of negative numbers in
an array of 10 numbers
● org 0h
mov r3, #05h
mov r0, #40h
check: mov a, @r0
inc r0
rlc a
jnc down
inc r5
down: djnz r3, check
end

3. 8051 ALP to find the number of odd numbers in an
array of 10 numbers
● org 0h
mov r3, #05h
mov r0, #40h
check: mov a, @r0
inc r0
rrc a
jnc down
inc r5
down: djnz r3, check
end

4. 8051 ALP to find number of even numbers in an
array of 10 numbers
● org 0h
mov r3, #05h
mov r0, #40h
check: mov a, @r0
inc r0
rrc a
jc down
inc r5
down: djnz r3, check
end

5. 8051 ALP to count the number of 1’s in a given 8-bit
number
● org 0h
mov a, 20h
mov r0, #07h
back: rrc a
jnc down
inc r1
down:djnz r0, back
end

6. 8051 ALP to count the number of 0’s in a given 8-bit
number
● org 0h
mov a, 20h
mov r0, #07h
back: rrc a
jc down
inc r1
down:djnz r0, back
end

7. 8051 ALP to find average of all positive numbers
in an array of 10 numbers
● org 0h
mov r3, #0ah
mov r3, #40h
check: mov a, @r0
mov r6, a
inc r0
rlc a
jc down
inc r5
mov a, r7
addc a, r6
mov r7, a
down: djnz r3, check
mov b, r5
div ab
mov 50h, a
end

8. 8051ALP to find average of all negative numbers
in an array of 10 numbers
● org 0h
mov r3, #0ah
mov r3, #40h
check: mov a, @r0
mov r6, a
inc r0
rlc a
jnc down
inc r5
mov a, r7
addc a, r6
mov r7, a
down: djnz r3, check
mov b, r5
div ab
mov 50h, a
end

9. 8051 ALP to check greatest of 2 numbers
● org 0h
mov a, 51h
subb a, 50h
jc down
mov 20h, 51h
sjmp stop
down:mov 20h, 50h
stop: nop
end

10. 8051 ALP to find smaller number
● org 0h
mov a, 51h
subb a, 50h
jnc down
mov 20h, 51h
sjmp stop
down:mov 20h, 50h
stop: nop
end

11. 8051 ALP to find largest number in an array of 5
numbers
● org 0h
mov r0, #40h
mov r2, #4h
mov 50h, 40h
back:mov a, @r0
inc r0
subb a, @r0
jnc down
mov 50h, @r0
down: djnz r2, back
end

12. 8051 ALP to find smallest number in an array of 5
numbers
● org 0h
mov r0, #40h
mov r2, #4h
mov 50h, 40h
back:mov a, @r0
inc r0
subb a, @r0
jc down
mov 50h, @r0
down: djnz r2, back
end

13. 8051 ALP to sort array in descending order
● org 0h
mov r5, #4h
backo: mov r4, #4h
mov r0, #20h
mov r1, #21h
backin: mov a,@r0
mov 50h, a
mov b,@r1
subb a, b
jc down
sjmp last
down: mov a, 50h
xch a,@r1
xch a,@r0
last: inc r0
inc r1
djnz r4, backin
djnz r5, backo
end

14. 8051 ALP to sort array in ascending order
● org 0h
mov r5, #4h
backo: mov r4, #4h
mov r0, #20h
mov r1, #21h
backin: mov a,@r0
mov 50h, a
mov b,@r1
subb a, b
jnc down
sjmp last
down: mov a, 50h
xch a,@r1
xch a,@r0
last: inc r0
inc r1
djnz r4, backin
djnz r5, backo
end

15. 8051 ALP unpacked BCD to ASCII code conversion
● org 0h
mov a, #5h
add a, #30h
mov 40h, a
end

16. 8051 ALP ASCII to unpacked BCD code conversion
● org 0h
mov a, #35h
subb a, #30h
mov 40h, a
end

17. 8051 ALP packed BCD TO ASCII code conversion
● org 0h
mov a, 50h
mov r0, 50h
anl a, #0fh
add a, #30h
mov 41h, a
mov a, r0
swap a
anl a, #0fh
add a, #30h
mov 40h, a
end

18. 8051 ALP ASCII to PACKED BCD code conversion
● org 0h
mov a, 41h
subb a, #30h
mov 51h, a
mov a, 40h
subb a, #30h
swap a
orl a, 51h
mov 50h, a
end

19. 8051 ALP to convert BINARY TO GRAY codes
● org 0h
mov a,40h
rrc a
xrl a,40h
end

20. 8051 ALP HEX to DECIMAL code conversion
● org 0h
mov a, 20h
mov b, #0ah
div ab
swap a
orl a, b
mov 50h, a
end

21. THANK YOU