I tried making an assembly code that prints out the first 10 numbers in the fibonacci sequence but instead I get some random characters like smiley faces. It's the first time I do this if somebody can help me with this thank you!
.model small
.data
n dw 10
.code
mov ax, @data
mov ds, ax
mov ax, 1
mov bx, 0
mov cx, n
urm:
mov ah, 2
mov dx, ax
int 21h
mov si, ax
add ax, bx
mov bx, si
dec cx
loop urm
mov ah, 4ch
int 21h
end
When you invoke DOS service WRITE CHARACTER TO STANDARD OUTPUT for the first time with
mov ah, 2
mov dx, ax
int 21h
register dl contains the number 1, which is not digit "1". You would have to convert it to a character
by ADD DL,"0". Unfortunately it is that easy only for numbers 0..9. See this answer how to convert greater binary numbers to a decimal format.
Also look at
dec cx
loop urm
This looks suspicious, because the instruction loop decrements cx by itself.
