I did not know the sources of keen game/(s?) were available. I remember reading in "Masters of Doom" about the scrolling technique [0], and how ID tried to use

I did not know the sources of keen game/(s?) were available. I remember reading in "Masters of Doom" about the scrolling technique [0], and how ID tried to use it to create a port of Mario for the PC. Now I can read the code, too :-). [1] 0: https://en.wikipedia.org/wiki/Adaptive_tile_refresh https://en.wikipedia.org/wiki/Adaptive_tile_refresh 1: https://github.com/keendreams/keen/blob/4348b4719be87a0b873f5f4f77b4de82ddf7050c/id_rf.c#L1057-L1069 https://github.com/keendreams/keen/blob/4348b4719be87a0b873f...