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Hardware abstraction and modularity
In computer architecture we deal with complexity by breaking the system into modules. For each module we distinguish abstraction from implementation.
- abstraction
- what the module does
- implementation
- how it does it
When using a module as a building block you are to focus exclusively on the module's abstraction, ignoring completely its implementation details.
The abstraction-implementation paradigm helps developers manage complexity and maintain sanity: by dividing an overwhelming system into well-defined modules we create manageable chunks of implementation work and localize error detection and correction.
[N.Nisan, S.Schoken. 2021. The Elements of Computing Systems (Second Edition)]
The design of the diagram below emphasises the role of abstraction and modularity in the movement from transistors to chips:
