Where to find the reference of dos.h for the c programming language?

Question

I'm looking for the reference/documentation of the dos.h API. (especially for an openwatcom specific version).

Where to get the documentation?

Answer 1

One reasonable starting point would probably be the library documentation at OpenWatcom.

Answer 2

Using the int 21h function reference widely available you could write your own DOS interface routine where the parameters are loaded into the appropriate registers inside the routine.

As I recall I needed three functions: one for character IO (byte register parameters), one for semi-complex (word register parameters - files, memory) and a third which I can no longer remember :(

It's a good exercise!

Answer 3

http://poli.cs.vsb.cz/c/help/dos.htm

Almost certainly not the original but a good resource anyway