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SampleTest I - ECE 3055 Computer Architecture and Operating...

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ECE 3055 Computer Architecture and Operating Systems Sample Test I 1. (25) Computer arithmetic and representations Consider the bit pattern 1010 1101 0001 0000 0000 0000 0000 0010. What does it represent assuming it is: a) a two’s complement number b) an unsigned number c) a single precision floating point number d) a MIPS instruction e) an ASCII sequence 2. (25) Evaluation a) (10)You are an engineering manager, evaluating performance enhancements to your game system. A cer- tain graphics operation comprises 20% of the machine cycles for a given game. Your are evaluating two alternatives. Option A automatically handles the operation in hardware, but increases the clock cycle time by a factor of 1.2. Option B adds a new instruction to the ISA which cuts the number of instructions needed for this operation in half, but increases cycle time by a factor of 1.1. What should you do? b) (15) Consider two di ff erent microprocessors (M1 and M2) which implement the same instruction set.
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