MIR_Hardware - ISM 4300 ISM Managing Information Resources...

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    ISM 4300 ISM 4300 Managing Information Resources Managing Information Resources Computer Hardware Computer Hardware
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INPUT DEVICES SECONDARY STORAGE PRIMARY STORAGE COMPUTER COMPONENTS CPU OUTPUT DEVICES COMMUNICATIONS DEVICES BUSES
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CPU & PRIMARY  STORAGE CPU CPU PRIMARY PRIMARY STORAGE STORAGE DATA BUS DATA BUS ADDRESS BUS ADDRESS BUS CONTROL BUS INPUT DEVICES OUTPUT DEVICES SECONDARY STORAGE
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CENTRAL PROCESSING UNIT  (CPU) RAM RAM PRIMARY (MAIN) MEMORY PRIMARY (MAIN) MEMORY CONTROL UNIT CONTROL UNIT ARITHMETIC/LOGIC ARITHMETIC/LOGIC UNIT UNIT ROM ROM CLOCK CLOCK
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    ALU & CONTROL UNIT ARITHMETIC- LOGIC UNIT:   CPU  component performs logic and  arithmetic operations CONTROL UNIT:   CPU component  controls, coordinates other parts of  computer system *
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Instruction Cycle: 1. FETCH 2. DECODE 3. PLACE IN INSTRUCTION REGISTER 4. PLACE INTO ADDRESS REGISTER * INSTRUCTION & EXECUTION CYCLE
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Execution Cycle: 5. SEND DATA FROM MAIN MEMORY  TO STORAGE  REGISTER 6. COMMAND ALU 7. ALU PERFORMS OPERATION 8. SEND RESULT TO ACCUMULATOR * INSTRUCTION & EXECUTION CYCLE
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COMPUTER TIME Millisecond      .001 second     thousand     15min 40 sec Microsecond   .001 millisecond   million       11.6 days   Nanosecond  .001microsecond  billion          31.7 years Picosecond     .001 nanosecond trillion        31,700 years                                             * NAME LENGTH SECOND TO 1 SECOND NAME LENGTH SECOND TO 1 SECOND # PER COMPARED # PER COMPARED
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    TYPES OF MEMORY RAM:   Random Access Memory Dynamic: Changes thru processing Static: Remains constant (power on) ROM:   Read Only Memory (preprogrammed) PROM: Program can be changed once EPROM: Erasable thru ultraviolet light EEPROM: Electrically erasable Also, primary and secondary memory *
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MEMORY SIZE KILOBYTE (KT):    2  bytes...  1024 bytes
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    VLSI CIRCUIT WITH CPU WORD LENGTH:   bits processed at one time MEGAHERTZ:   one million cycles per second DATA BUS WIDTH:   bits moved between CPU &  other devices REDUCED INSTRUCTION SET COMPUTING  (RISC):  
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