Video Scroll (part I)
In this post, I write about accessing Video RAM directly in mode 0x03 to create visual effects. I am currently investigating the video component of a personal computer. After many experiments, I felt like trying to access the Video RAM directly to create some video effects on the screen. Of course, learning was my motivation, but I wanted to create a visual effect of a certain utility, rather than just playing around with experiments. I decided to try to reproduce, in a primitive way, the visual effect of a chatter such as Whastapp on mobile phones. It turned out that to create such a visual effect was quite hard indeed, and I couldn't do that just in one step so I decided to prepare an intermediate step. This post is about that intermediate step. As you will see, this intermediate step is already more than enough for learning how to access the Video RAM directly and create visual effects; however, I am ...
