When I was a kid, I spent a huge amount of time reading everything I could find in the msdos programming archives on x2ftp.oulu.fi: ftp://ftp.lanet.lv/pub/pro

When I was a kid, I spent a huge amount of time reading everything I could find in the msdos programming archives on x2ftp.oulu.fi: ftp://ftp.lanet.lv/pub/programming/mirror-x2ftp/ Denthor's tutorials were also included in the "PC Game Programmer's Encyclopedia" (also on that site) which collected many useful documents. I had been programming for a while, but Denthor's tutorials were among the first that allowed me to go beyond simple text adventures and graphics with the BGI (Borland Graphics Interface!). All that stuff had a profound effect on me; not just the technical information, but the idea of communicating that information for free in a way that was comprehensible to novices.