60300 POKE211,X:POKE214,Y:SYS58640:IFLEN(A$)=0THENRETURN
60305 POKE646,F1:PRINTA$
60310 POKE211,X:POKE214,Y+1:SYS58640
60312 POKE646,F2:PRINTA$
60315 RETURN