0 L=0:T=0:V=0:DIM V$(4):POKE 752,1:? CHR$(125)
10 L=PEEK(54283)
20 IF L>T THEN T=L
30 V$="PAL":IF T<131 THEN V$="NTSC"
40 IF T>V THEN V=T:? CHR$(125);T;" ";V$
50 GOTO 10