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Join Date: Nov 2008
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CPUs

11/18/2008 8:53 AM

How do Central Processing Units work?

Help would be appreciated


Ross McDonald

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Commentator
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#1

Re: CPUs

11/18/2008 9:40 AM

I have several books written about this topic, I had to read and understand them to learn how a CPU works.

I don't think I could condense all that information into one or two paragraphs.

Try reading a good book.

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#2
In reply to #1

Re: CPUs

11/19/2008 4:48 PM

I agree with you and add that RossMcDonald may start from here http://www.hardwaresecrets.com/article/209

Cheers,

ethobil

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#3

Re: CPUs

12/05/2008 8:15 AM

In a nut shell, they are very fast dedicated logic gates which perform basic functions such a adding, subtracting (by inverting and adding 1 - in binary), and bit shifting or comparing as directed by a set of instructions commonly referred to as machine language or assembler code.

The architecture if those kinds of basic logic structures defines what the CPU can do and how fast they can perform the instructions. Many CPU's also have timers and counters and other types of ports for specific data manipulation. They all have some sort of permanent or semi-permanate memory set aside for storing programmed instructions. They also have RAM memory for Data. They typically have both a data bus (the highway on which data is passed around from device to device) and an address bus which selects which memory cells are to be activated for accessing data.

Adding devices and software makes the system unique. Obviously, there are endless combinations of both which make up a larger device that we think of as a computer.

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