Ok, I'am very new in assembly, so, i have some questions : why that is not posible : ld (_penRow),0 why must I do that : ld a,0 ld (_penRow),a what must I do to go in a new line ( ld a,1 ld (_penRow),a don't work) in assembly studio 86, why must the file be 8 char (if not, the prog name in the calc contain ".86") P.S. sorry for my english... I am french thanx Nicolas