Revision history:

3.03 - Tue Jan 31 2004
        - Added check in validate() to make sure the initAddress is within
          the load range for PSIDs.
        - Added complete support for the 'C64 BASIC' RSID flag: added the new
          getC64BASIC(), isC64BASIC(), setC64BASIC() methods, changed the
          PlaySID flag related methods. See documentation for details.

3.02 - Fri Nov 22 2002
        - The load range wasn't calculated correctly when checking for the
          relocation range. Fixed it.
        - Changed the "copyright" field name to "released", but "copyright"
          remains an accepted alias for "released".

3.01 - Sat Nov 03 2002
        - There was a bug in the relocation page checking code. Fixed it.

3.00 - Tue Oct 29 2002
        Major changes:
        - First of all, the module name was changed from Audio::PSID to
          Audio::SID.
        - The module now also handles RSID (Real SID) files, which are
          basically PSID v2NG files with 'RSID' as their magic ID (instead
          of 'PSID'). These files strictly require a C64 environment in SID
          emulators to run properly, appropriate PSID v2NG restrictions are
          enforced for it.
        - 'magicID' is a new field that can also be changed: it can be set
          either to 'PSID' or 'RSID'.
        - new(), read() and write() can also take named parameters (see POD
          for details).
        - The validate() method was updated so it produces a valid PSID v2NG
          or RSID file.
        - The included PSID_v2NG.txt file containing the file specification
          was extended to include RSID and renamed to SID_file_format.txt.

        Bugfixes:
        - The read() method didn't take a filehandle correctly. (Thanks to
          Niklas Bichinger for reporting it!)
        - The last byte of a file wasn't read if the C64 data was exactly
          64 kB large (#$%@ boundary conditions!).
        - set() didn't always set the fields properly if a hash containing
          more than one field-value pair was passed to it.

2.02 - Tue Sep 5 2002
        There was a bug in the new MD5 calculation when PSID version was 1.
        Fixed it.

2.01 - Tue Sep 3 2002
        Changed the MD5 calculation to include the CLOCK field if it's
        set to NTSC. The old MD5 fingerprints can still be asked - see
        POD for details.

2.00 - Wed Apr 3 2002
        Added PSID v2NG support.
        Major interface changes - see POD for details.

1.60 - Sun Jan 6 2002
        First version released to CPAN.

1.00 - Fri Jun 11 1999
        First publicly released version.
