Assembly Language Programming Tutorial - 19 - Defining Data and Variables

All references in this video came from:

Download:

[bm_tv]

For people having trouble:
This code doesn't work with ".model small", if you want to use it like this you have to use ".model tiny".
For ".model small" you should do this instead:

.model small

.data

num1 db 6

.code


.startup

mov dl, num1

add dl, 30h
mov ah, 2h ;code to print character
int 21h ;starts the code above (prints value on "dl")

.exit

[inadaizz]

When you said Rasim I thought I heard "rossmann" like the Apple guy lol.
Thanks for the upload Rasim! I appreciate you.

[Nintenzo]

better flow than the previous videos, nice to see explanations

[nero]

for everyone have problems here is the right code
.model small
.stack 100h
.data
data1 db 5
.code
main proc

mov ax, data
mov ds, ax

mov dl, data1
add dl, 30h

mov ah, 2
int 21h


endp
end main


u need this 2 line of code to work properly
mov ax, data
mov ds, ax

[volodymyrgutsu]

It works for me with a .model tiny only

[TheWackyCoop]

nothing would change the value which is added into dl register then not correct output will come?

[arhaisme]

If I put 7 instead of 2, it won't show 7, it shows 2. Why is that?

[AlexSophiaAguilar]

I'm having problems following the different strange letters. Some times i don't know when you talking about a register or a variable or a thing like 2h... where does 2h come from? is it what goes under (.data) a way to declare variables?

[TruckerAgain]

yeah i am getting the same issue with the variable not working

[khorclcl]

why it printed 2 while it run?
mov dl, count1 ; is it move 2 to dl?
add dl, 48; add 48+2?
I am confused, or they are in ASCII code?

[ahmedabdelmalek]

It doesn't work for me
it kept saying that
so it changes nothing

[handsomekhan]

My Result is not showing Correctly .. its giving This " ý " , when i used db otherwise its shows 2, when i dont used the Variable . why is that . please help Dude .

[kce_ruby]

my shows Question mark.
why is that?

[Hunar]

How to make an executable for win7? .. so far i need DOSBOX to run them without the emulator

[ahmedabdelmalek]

So what is the difference between DB and BYTE ?

[AmineOnline]

.model small

.data

xchar db 65 ;ascii char A

.code


main proc
mov ax, data
mov ds, ax


mov dl, xchar

mov ah, 2h ;print char
int 21h ;print value of dl

endp
end main