10 REM PEEK and POKE: the memory of the computer
20 PRINT "Left margin: ";PEEK(82)
30 PRINT "Right margin: ";PEEK(83)
40 SCR=PEEK(88)+256*PEEK(89)
50 PRINT "The screen starts at ";SCR
60 DIM A$(5):A$="HELLO"
70 PRINT "The first byte of A$ is ";PEEK(ADR(A$))
80 POKE ADR(A$),74
90 PRINT A$
100 POKE 82,10
110 PRINT "Margin 10 from the next line on"
120 PRINT "Here it is"
130 POKE 82,2
140 PRINT "And back"