1 Computer Language
Keyboard Each key represents a number of electrical signals (a stream of electrons and spaces) |
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To input data A key is depressed |
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For each key depressed A number of electrical impulses (signals and non-signals) are sent to the computer |
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Silicon chip The circuits on the silicon chips are activated |
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Signal A corresponding signal is sent to the screen (composed of signals and non-signals) |
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Image formation When an electron interacts with the screen the screen fluoresces When there are no electrons it does not fluoresce |
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Example image of a letter T | |
111111 | |
001100 | |
001100 Where 0 = no electron and 1 = electron | |
001100 | |
Decimal System | |
Binary | |
A 64 32 16 8 4 2 1 = Decimal numbers | |
B 1 1 1 0 1 1 0 = Binary number | |
C 0 1 0 1 0 0 1 = Binary number | |
To Change Binary to Decimal (This can be done automatically by using a computer’s Scientific Calculator) |
Example 1 |
Example 2 | |
To Change Decimal to Binary (This can be done automatically by using a computer’s Scientific Calculator) |
128 64 32 16 8 4 2 1 |
Example | |
Bit (BInary digiT) |
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Byte | |
Example | |
[Decimal] [Character] [Character] | |
115 01110011 s | |
34 00100010 ″ | |
68 01000100 D | |
Hexadecimal System |
Decimal | Hexadecimal | Binary |
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0 | 0 | 0 |
1 | 1 | 1 |
2 | 2 | 10 |
3 | 3 | 11 |
4 | 4 | 100 |
5 | 5 | 101 |
6 | 6 | 110 |
7 | 7 | 111 |
8 | 8 | 1000 |
9 | 9 | 1001 |
10 | A | 1010 |
11 |