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@@ -31,7 +31,10 @@ http://www.cs.cmu.edu/~ralf/files.html
https://blog.packagecloud.io/eng/2016/04/05/the-definitive-guide-to-linux-system-calls/
A20:
+http://wiki.osdev.org/A20_Line#Recommended_Method
+http://aodfaq.wikidot.com/mc-a20-controls
http://www.independent-software.com/writing-your-own-toy-operating-system-enabling-the-a20-line/
+https://www.win.tue.nl/~aeb/linux/kbd/A20.html
longjmp:
http://blog.reverberate.org/2013/05/deep-wizardry-stack-unwinding.html