10340 INPUT K$: IF NOT LEN(K$) OR DC = 129 THEN 10350
10341 IF MID$ (K$,18,3) < >"DIR" THEN 10340
10342 K$ = MID$ (K$,2,15)
10344 IF RIGHT$(K$,1) = " " THEN K$ = LEFT$(K$, LEN(K$) -1): GOTO 10344
10345 DC = DC +1:SB$(DC) = K$: GOTO 10340
10350 PRINT CHR$(4)"CLOSE"
10360 IF DC < >0 THEN 10520
10370 CALL BOX,6,6,30,15: PRINT "There are no subdirectories": PRINT "in "CP$".": PRINT : PRINT "Prefix has been set.": PRINT : PRINT "Press a key.": GOSUB 20000
40010 IF PF$ = "" THEN CALL BOX,6,6,30,15: PRINT "No prefix has been set.": PRINT : PRINT "Press a key.": GOSUB 20000: ON WHERE GOTO 3000,4000,6000,7000,300
61990 REM <CTRL-0x0a>HUMMY TONE P=PITCH,D=DURATION
62000 CALL PEEK(121) + PEEK(122) *256 +32,P,D: REM GET COS g EXP R CHR$ ONERR P PLOT TAN GET GET COS g EXP R CHR$ ONERR P PLOT ATN GET PLOT 0 TAB( GR MID$ MID$ = <CTRL-0x05> OR ATN GET <UNKNOWN TOKEN><CTRL-0x13> * = <CTRL-0x05> RESTORE TAN GET = <UNKNOWN TOKEN> RIGHT$<CTRL-0x01> = MID$ IF TAN GET = PEEK````