Discovering Computers 2014: Chapter6

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Presentation transcript:

Discovering Computers 2014: Chapter6 Chapter 2-02: Memory http://upload.wikimedia.org/wikipedia/commons/thumb/1/16/Eprom.jpg/800px-Eprom.jpg Discovering Computers 2014: Chapter6

Differentiate among the various types of memory Objectives Overview Differentiate among the various types of memory Discovering Computers 2014: Chapter 6 See Page 248 for Detailed Objectives

Memory Memory consists of electronic components that store instructions waiting to be executed by the processor, data needed by those instructions, and the results of processing the data Stores three basic categories of items: The operating system and other programs Applications Data being processed and the resulting information Discovering Computers 2014: Chapter 6 Page 261

Memory Volatile memory Nonvolatile memory The system unit contains two types of memory: Volatile memory Loses its contents when power is turned off Example includes RAM Nonvolatile memory Does not lose contents when power is removed Examples include ROM, flash memory, and CMOS Discovering Computers 2014: Chapter 6 Page 262

Discovering Computers 2014: Chapter 6 Memory Two common types of RAM chips exist: Dynamic RAM (DRAM) Static RAM (SRAM) Discovering Computers 2014: Chapter 6 Page 263 Table 6-1

Discovering Computers 2014: Chapter 6 Memory Memory cache speeds the processes of the computer because it stores frequently used instructions and data Discovering Computers 2014: Chapter 6 Page 265 Figure 6-14

Discovering Computers 2014: Chapter 6 Memory Access time is the amount of time it takes the processor to read from memory Measured in nanoseconds Discovering Computers 2014: Chapter 6 Page 267 Table 6-2 and Figure 6-15

How memory stores data, instructions, and information Summary How memory stores data, instructions, and information Discovering Computers 2014: Chapter 6 Page 241

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