Browse Definitions :
Definition

memory map

A memory map is a massive table, in effect a database, that comprises complete information about how the memory is structured in a computer system. A memory map works something like a gigantic office organizer. In the map, each computer file has a unique memory address reserved especially for it, so that no other data can inadvertently overwrite or corrupt it.

In order for a computer to function properly, its OS (operating system) must always be able to access the right parts of its memory at the right times. When a computer first boots up (starts), the memory map tells the OS how much memory is available. As the computer runs, the memory map ensures that data is always written to, and read from, the proper places. The memory map also ensures that the computer's debuggers can resolve memory addresses to actual stored data.

If there were no memory map, or if an existing memory map got corrupted, the OS might (and probably would) write data to, and read data from, the wrong places. As a result, when data was read, it would not always pertain to the appropriate files or application programs. The problem would likely start out small and unnoticeable, worsen with time, and become apparent only after considerable damage had been done to stored data and programs. In the end, some or all of the applications would fail to run, and many critical data files would be ruined.

 

Continue reading about memory maps:

WiseGEEK describes how memory maps work.

Joe Forster portrays a complete memory map for the Commodore 64 computer.

This was last updated in April 2012

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

SearchSecurity

  • GPS jamming

    GPS jamming is the process of using a frequency transmitting device to block or interfere with radio communications.

  • time-based one-time password (TOTP)

    A time-based one-time password (TOTP) is a temporary code, generated by an algorithm, for use in authenticating access to ...

  • Security Operations Center (SOC)

    A security operations center (SOC) is a command center facility for a team of IT professionals with expertise in information ...

SearchHealthIT

SearchDisasterRecovery

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

  • business continuity software

    Business continuity software is an application or suite designed to make business continuity planning/business continuity ...

SearchStorage

  • SSD (solid-state drive)

    An SSD (solid-state drive) is a type of nonvolatile storage media that stores persistent data on solid-state flash memory.

  • NAND flash memory

    NAND flash memory is a type of nonvolatile storage technology that does not require power to retain data.

  • storage class memory (SCM)

    Storage class memory (SCM) is a type of NAND flash that includes a power source to ensure that data won't be lost due to a system...

Close