Memory and Storage

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Chapter 9

• Memory and Storage

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9.2 Definition

• Memory
• A solid-state digital device that provides
  storage for data values

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9.3 The Key Aspect of Memory

• Technology
• The properties of the underlying hardware
  mechanisms used to construct the memory system
• Organization
• The way the underlying technology is used to form
  a working system

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9.4 Characteristics of Memory Technologies

• Volatile or nonvolatile
• Random or sequential access
• Read-write or read only
• ROM
• PROM
• EEPROM
• Flash ROM
• Primary or secondary

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9.5 The Important Concept of a Memory Hierarchy

• To optimize memory performance for a given cost,
  a set of technologies are arranged in a hierarchy
  that contains a relatively small amount of fast
  memory and larger amounts of less expensive, but
  slower memory.

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9.6 Instruction and Data Store

• Although most modern computer systems place
  programs and data in a single memory, it is
  possible to separate the instruction store from
  the data store.

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9.7 The Fetch-Store Paradigm

• There are two basic operations associated with
  the Fetch-Store paradigm
• The Fetch operation (Read)
• The Store operation (Write)