computers and apps notes

computers and apps notes - 9/9/10 Representing numbers,...

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9/9/10 Representing numbers, text, and pictures -numeric data -binary number system -character data -ASCH. extended ASCH EBCDIC and Unicode CPU- central processing unit -control unit -ALU- arithmetic logic unit control unit- four functions (in steps) called “machine cycle” -fetch -decode -execute -write-back/ store ALU -performs all computations -adding, subtracting, mulitplying, dividing -performs logic operations clock speed/rate -measured in hertz MHz- million ticks per second GHz- billion ticks per second -each tick is referred to as a clock cycle 800 MHz computer -800,000,000 cycles per second 2.4 GHz computer -2,4000,000,000 cycles per second the clock speed is useful for providing comparisons between processor chips from the same processor family Increasing CPU speed -overclocking: running the processor at a higher speed than recommended by manufac- turer (voids warranty and reduces lifespan) -pipelining Microprocessor -serial processing -pipelining -parallel processing
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-multlicore processing -hyper threading technology Microprocessor Basics -microprocessor clock -megahertz -gigahertz -front side bus -hyper transport -word size -cache -level 1 cache -level 2 cache -CISC vs, RISC technology What makes CPU’s different -number of transistors -clock speed - amount of cache memory
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This note was uploaded on 10/25/2011 for the course COMP APPS 101 taught by Professor Ganu during the Spring '07 term at Rutgers.

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computers and apps notes - 9/9/10 Representing numbers,...

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