Solution:

There are two choices when you develop your program: 1. Refer to sub-routines inside "Example4.C" in your ADAM-4500 shipped disk, you can base on these sub-routines to develop your application. 2. Adopt the library of ADAM-5510. ADAM-4500 supports ROM-DOS environment just like ADAM-5510, if certain function you want to use is provided by the hardware of ADAM-4500, there is no problem to use the library of ADAM-5510 under ADAM-4500. By the way, you'd better use Turbo C 3.0 as your compiler.