7-1 Chapter 7- Memory System Design Chapter 7- Memory ...

7-1 Chapter 7- Memory System DesignComputer Systems Design and Architecture by V. Heuring and H. Jordan 1997 V. Heuring and H. Jordan: Updated David M. Zar, February, 2001 Chapter 7- Memory System Design Introduction RAM structure: Cells and Chips Memory boards and modules Two-level Memory hierarchy The cache Virtual Memory The Memory as a sub- System of the computer7-2 Chapter 7- Memory System DesignComputer Systems Design and Architecture by V. Heuring and H. Jordan 1997 V. Heuring and H. Jordan: Updated David M. Zar, February, 2001 IntroductionSo far, we ve treated Memory as an array of words limited in size only by the number of address bits. Life is seldom so world issues arise: cost speed size power consumption volatility other issues can you think of that will influence Memory Design ?7-3 Chapter 7- Memory System DesignComputer Systems Design and Architecture by V.

•Dynamic RAM–less expensive, but needs “refreshing” •Chip organization •Timing •ROM–Read only memory •Memory Boards •Arrays of chips give more addresses and/or wider words •2-D and 3-D chip arrays • Memory Modules •Large systems can benefit by partitioning memory for •separate access by system components

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