sp99-sw-e3 - ECE 2030 4 problems 6 pages Computer...

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ECE 2030 Computer Engineering Spring 1999 4 problems, 6 pages Exam Three 28 May 1999 1 Name (print) _____________________________________________________ 1 2 3 4 total 30 10 30 30 100
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ECE 2030 Computer Engineering Spring 1999 4 problems, 6 pages Exam Three 28 May 1999 2 Problem 1 (3 parts, 30 points) The Memory System Problem Imagine a one gigabyte memory array organized as 256 million address of 32 bit words. The following three parts consider how the memory system could be built using three different DRAM memory chips. Part 1.A (10 points) Suppose the gigabyte memory system is built using today’s 256 megabit DRAM organized as 32 million addresses of eight bit words. number of chips needed in 32M word bank number of banks for 256 million addresses memory decoder required ( n to m ) number of DRAM chips required Part 1.B (10 points) Suppose the gigabyte memory system is built using the original IBM PC’s 16 killobit DRAM organized as 16 thousand addresses of one bit words. number of chips needed in 16K word bank number of banks for 256 million addresses memory decoder required ( n to m ) number of DRAM chips required Part 1.C (10 points) Suppose the gigabyte memory system is built using tomorrow’s one gigabit DRAM organized as 64 million addresses of sixteen bit words.
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