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*              NOW AVAILABLE!  MOD Source for Programmers                     *
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Currently available: Turbo Pascal 5.0, 5.5, 6.0, 7.0
Coming soon: QuickBasic, C (not available yet so don't order)

To order this, you must first register SPKPLAY (or both at the same time).
Run the REGISTER program and list 'MOD Source' in the Programs to register
  section.  The cost is $20.
You can link it with your programs and play MODS in the backgrounds.
Currently supports the PC Speaker and SoundBlaster.