I am talking in terms of the good old DOS mode.
Can someone kindly tell me how does a keyboard work? For example, when I press the key "A", what really happens? What cause the letter "A" to appear on screen?
Also, if I type a word say "dir" in DOS prompt, what cause the letters to be arranged neatly in a row? Is it the DOS or is it the CPU? Why doesn't the letters appear randomly all over the black screen? Why are letters arranged in rows on the black screen?
Also, after typing the word "dir" and I press enter, how does the CPU accept the word typed?
Lastly, if I want to add my own character on the keyboard to be used, what do I need to update? The keyboard circuit only or the CPU also?
How does a keyboard work? Does anyone have any reference?
2006-09-08
13:59:58
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8 answers
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asked by
Sleuth!
3
in
Other - Hardware