What, in general terms, is the distinction between computer organization and computer
architecture?
1)
Computer architecture refers to those attributes of a system visible to a programmer
or, put another way, those attributes that have a direct impact on the logical
execution of a program.
Computer organization refers to the operational units
and their interconnections that realize the architectural specifications.
2)
Examples of
architectural attributes include the instruction set, the number of bits used to represent
various data types (e.g., numbers, characters), I/O mechanisms, and techniques
for addressing memory.
Organizational attributes include those hardware details
transparent to the programmer, such as control signals; interfaces between the computer and peripherals; and the memory technology used.
3)
For example,
it is an architectural design issue whether a computer will have a
multiply instruction.
It is an organizational issue whether that instruction will be implemented
by a special multiply unit or by a mechanism that makes repeated use of
the add unit of the system.The organizational decision may be based on the anticipated
frequency of use of the multiply instruction, the relative speed of the two approaches,
and the cost and physical size of a special multiply unit.
4)
Many computer manufacturers offer a family of
computer models, all with the same architecture but with differences in organization.
5)
a particular architecture may span many years and encompass a number of different computer models, its organization changing with changing technology
What is the distinction between computer organization and computer architecture?
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