Changes

*[https://www.tutorialspoint.com/microprocessor/index.htm Microprocessor Tutorial]

*[https://lennartb.home.xs4all.nl/coreboot/col2.html A brief history of the PC platform from 1981 to 2011]

*[https://archive.org/details/The_Undocumented_PC_Second_Edition_Frankvan_Gilluwe/ The Undocumented PC] A Programmer’s Guide to I/O, CPUs, and Fixed Memory Areas

*[https://www.nand2tetris.org/ From Nand to Tetris] [https://github.com/jherskow/nand2tetris/blob/master/nand2tetris%20BOOK.pdf The elements of computing systems ebook]