basic start
   100 print "{wht}saving file"
   110 sys {save_file}   
   120 GOSUB 2000:rem stampa ST
   130 gosub 1000:rem read file with basic
   140 gosub 200:rem read file with lm
   150 end   

   200 rem =============================
   205 print "loading file at $2000"
   210 sys {load_file}
   220 print "load ok"
   230 l={file_content_end}-{file_content_start}
   240 for t=0 to l-1
   250 poke 1024+t,peek(8192+t)
   260 next
   270 return

  1000 rem ========================
  1005 REM reads the file "prova"
  1006 print "reading back file"
  1007 C=0
  1010 OPEN 1,8,2,"prova"
  1020 IF ST<>0 THEN GOTO 1050
  1030 GET#1,A$:IF A$="" THEN A$=CHR$(0)
  1040 PRINT A$;:C=C+1:GOTO 1020
  1050 PRINT:GOSUB 2000
  1055 PRINT "bytes=";C
  1060 CLOSE 1
  1070 RETURN

  2000 PRINT "st=";ST;
  2001 IF (ST AND 2)<>0 THEN PRINT "timeout ";
  2010 IF (ST AND 16)<>0 THEN PRINT "verify error";
  2020 IF (ST AND 64)<>0 THEN PRINT "eof ";
  2030 IF (ST AND 128)<>0 THEN PRINT "device not present ";
  2035 PRINT
  2040 RETURN
basic end