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Processor Tutorial
INTERNAL COMPONENTS OF A PROCESSOR
DIFF. ARCHITECTURES
CISC
RISC
VON NEUMANN ARCHITECTURE
HARVARD ARCHITECTURE
ENDIANNESS
CLOCK FREQUENCY
PROCESSOR PERFORMANCE MEASUREMENT
MODERN ARCHITECTURE IMPROVEMENTS
IMPORTANT TERMS
HOW INSTRUCTIONS ARE FORMED?
MEMORY
 

 

 

ENDIANNESS:

Different computers put their multi-byte data words (i.e., 16-, 32-, or 64-bit words) in different ways in RAM. Each individual byte in a multi-byte word is still separately addressable. Some computers order their data with the most significant byte of a word in the lowest address, while others order their data with the most significant byte of a word in the highest address. This distinction is known as endianness.

Computers that order data with the least significant byte in the lowest address are known as "Little Endian", and computers that order the data with the most significant byte in the lowest address are known as "Big Endian". It is easier for a human to view multi-word data dumped to a screen one byte at a time if it is ordered as Big Endian (i.e. most significant at lowest address).

The user cannot tell the difference between computers that use the different formats. However, difficulty arises when different types of computers attempt to communicate with one another over a network.

 

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