I am currently trying to create a program that detects if a DOS executable uses non-text mode in it or not.
I am uncertain if there is any semantics for it in the header of the 16-bit executable but the only way I found out (for now), is to check the value of AX every time int 10h(CD10) is found in the code (that is by using some debugger like technology)
Is there any easier and more efficient way to know if a DOS executable might use graphics mode in it or is this the only possible way to achieve it?
Also, is it possible to execute over to a specific offset in the code (position in the exe file) and then find the value of AX at that point of time (programmatically)?
The proposed solution/code can be purely written in Windows (if needed)
(I personally feel the method proposed by me might not be 100% accurate as the value of AX might depend on the flow of the program)