I was looking after an Assembly routine to write a pixel inthe screen when I found this article. Despite a little old, it presents a logical sequence to accomplish the task. However, as it was written back in 1994, I suppose the author didn't use DevShed C++ to program it, so the function where he access the interrupts of the video card simply does not work ;-) As I say in a comment below, I am going to use my FREE and OLD C compilers IDEs : How to put a pixel in the screen by Mr. Grant Smith .
This whole code relies on a function, that does not work on WINDOWS, so let's find it or implement it ! :-)
I have added the code supplied above.