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11 Cards in this Set
- Front
- Back
General purpose computer system |
A computer is an electronic device , operating under the control of instructions stored in its memory. Accept data (input) Manipulate data (processing) Produce results from the processing Store data and results for future use (memory)
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CPU |
Central processing unit which is the brain of the computer and therefore controls how the rest of the computer works CU- CARRIES OUT INSTRUCTIONS IN THE SOFTWARE AND DIRECTS THE FLOW OF DATA THROUGH THE COMPUTER ALU- PERFORMS THE CALCULATIONS AND LOGIC OPERATIONS |
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Main memory |
Located directly on the main circuit board so that data can travel quickly to and from the CPU.
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Secondary storage |
Permanently stored |
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Bistable Devices |
It can be in only two possible states. ON/OFF 0/1 PULSE/NO PULSE |
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ROM vs RAM |
RAM has temporary instructions for the computer, where the CPU receives instructions from. It is volatile ROM- instructions that can be read but not changed (non-volatile) |
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ROMS |
PROM-programmable ROM EPROM- erasable PROM, can be erased and reprogrammed repeatedly. It is erased when exposed to UV light EEPROM- electronically EPROM, erased electronically |
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Bit |
Zeros and ones known as the binary system |
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Byte |
8bits is 1 byte Kilobyte is 2^10 which is 1024bits |
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Word |
Largest amount of data which can be accessed together is called a word |
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Wordsize |
Number of bits which can be transferred in a word is know as its wordsize |