qbasic.hlp (Topic list)
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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Converting BASICA Programs
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  Remember the following points when converting BASICA programs to QBasic:
 
  ■ Save the BASICA program in ASCII format. QBasic cannot use programs that
    are saved in BASICA's binary format.
 
  ■ Use the /MBF command option when starting QBasic. The /MBF option enables
    QBasic to read and write BASICA data files.
 
  ■ Change CALL statements to CALL ABSOLUTE. The BASICA CALL statement is
    equivalent to QBasic's CALL ABSOLUTE.
 
  In addition, you may want to use REMLINE.BAS to remove unnecessary line
  numbers from the programs you are converting. QBasic does not require
  line numbers and removing them can improve a program's readability.
 
 See Also    Differences from BASICA    Unsupported Keywords
             Version Differences