For those who are unfamiliar, Óscar Toledo G. (and his family) are all world-class hackers (and teachers) when it comes to low-level computing[1]. I learned about his family's work (as well as his own) on this website[2].

1 = http://www.biyubi.com/tecnologia.html#resumen

2 = https://news.ycombinator.com/item?id=20570154