1000 REM *** SAMPLE OVERLAY SUB1 ***
1010 POKE 43,1 : POKE 44,8 : REM MUST BE FIRST LINE.
1020 PRINT:PRINT"THIS IS THE OVERLAY."
1030 PRINT:PRINT"PRESS ANY KEY TO RETURN TO"
1040 PRINT"THE MAIN PROGRAM."
1050 GETA$ : IF A$="" THEN 1050
1060 Z=2:REM Z TELLS MAIN PROGRAM WHERE TO RESUME EXECUTION
1070 P$="MAIN" : GOTO 10 : REM LOAD MAIN AGAIN.