Commander Keen source code released
A little slice of history regarding one of the technical foundations of Commander Keen, for those that aren't aware:<p>"Then, the first breakthrough. John Carmack devised a smooth, scrolling routine similar to that used for the background of Nintendo games but never before possible on the PC." [1]<p>The technique is called, <i>adaptive tile refresh.</i> [2]<p>[1] <a href="http://www.3drealms.com/keenhistory" rel="nofollow">http://www.3drealms.com/keenhistory</a><p>[2] <a href="https://en.wikipedia.org/wiki/Adaptive_tile_refresh" rel="nofollow">https://en.wikipedia.org/wiki/Adaptive_tile_refresh</a>