2+2 : Basis of Computer Technology? - Techist - Tech Forum

 Techist - Tech Forum 2+2 : Basis of Computer Technology?

 05-05-2010, 07:35 PM #1 (permalink) Junior Techie   Join Date: Mar 2009 Posts: 67 2+2 : Basis of Computer Technology? Since it would seem (fairly obviously) that the basis of modern computer technology is math, I'm going to ask a simple question that probably has a fairly complicated answer... "What does a computer do in order to find the value of 2+2?" In other words, what phenomena are harnessed so that a computer can complete any valid mathematical operation? What happens between the time that appropriate energy enters the computer and the time that "4" appears on the screen as a specific arrangement of pixels? Again, I'm sure this is pretty complicated. But if you've got the knowledge, feel free to be as detailed as you can. I (and hopefully plenty of others) would find it very interesting. __________________ __________________
 05-05-2010, 07:56 PM #2 (permalink) Lord Techie     Join Date: Mar 2007 Location: Australia Posts: 8,766 Re: 2+2 : Basis of Computer Technology? You're right in that the answer is quite complicated. What you're looking to understand is ALUs and FPUs, which form the basis of pretty much every processor designed. They're made up of smaller circuits, which in turn are comprised of logic gates. The pic below is of an 'adder' which is part of what an ALU is made up of. I'd suggest reading up here, unless you understand the basics of binary logic and simple electronics though, it's not going to make much sense I'm afraid Arithmetic logic unit - Wikipedia, the free encyclopedia __________________ __________________ "As a result of all this hardship, dirt, thirst, and wombats, you would expect Australians to be a sour lot. Instead, they are genial, jolly, cheerful, and always willing to share a kind word with a stranger, unless they are an American." -- Douglas Adams
 05-06-2010, 07:58 PM #3 (permalink) Junior Techie   Join Date: Mar 2009 Posts: 67 Re: 2+2 : Basis of Computer Technology? Interesting. Thanks for the reply; I hope to look into it. Other responses are welcome, as well! __________________

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