sorry for the confusion, i know that db reserves space, the problem is that i don't know how to reuse that space later.

as i said, i want to declare a variable or space, and then later in the code when i press a push button, or enter data from keypad, etc, this data gets into that variable and stored, so that it can be used later.

please help. i have about 84 variables, so i can't double or triple them to run away from this problem.

in terms of code things would look like:

x1: db "0"
x2: db "1"
.
.
.
.
mov x1,"0101"



i already know this code won't work, that's why i'm searching for help here