hi, i'm new to the assembly world and the whole 8051/52 thing.
i was writing code but i can't get it to work fine without changing some predefined variables, and i seem to be helpless and need some outer hand to guide me.
i'll give an example that will explain my request:

org 000h
ljmp main
.
x1 equ "0"
x2 equ "0"
x3 equ "1"
.
main:
.
mov x1,"1"
.
message: db x1,x2,x3,0
.
.
end

i made that code up for better explanation, all i need are some variables i can manipulate while the program is running.

i hope it's feasible cause it'll make my life easier.

thanks for any help given.