Int 2F Fn C64C  U - Smart Prompt - Installation Check                      [d]

   AX = C64Ch
   BX = 5553h

Return: AX = 4CC6h if installed
   BX = 5355h if installed
Program: Smart Prompt (SMARTPMT) is a freeware TSR by Steve Gibson which forces
     an immediate flush of SmartDrive's (and compatible caches') buffers
     on returning to the DOS prompt