Question

Problem 2. Write a program that contains two segments: A data segment called SEG DATA that contains two variables NUM1 and NUM2 where the size of each is one byte. A code segment SEG CODE that will compute the sum of even and odd values of a memory block of size 10 bytes that is saved at DS:0200H. The sum of even values should be saved in NUM1 and the sum of odd values in NUM2.

Answer 1

The following is the ASM code for the above question:

.model tiny
.486
.data
num1 db 0
num2 db 0
.code
.startup
mov cl,11
mov di,0200h
x5: mov dl,[di]
mov dh,dl
and dl,0fh
and dh,0f0h
ror dh,4
mov al,dl
mov ah,00h
mov bl,2
div bl
cmp ah,0
jnz x1
add num1,dl
jmp x2
x1: add num2,dl
x2: mov al,dh
mov ah,0
div bl
cmp ah,0
jnz x3
add num1,dh
jmp x4
x3: add num2,dh
x4: inc di
dec cl
jnz x5
.exit
end