Differentiate between isolated versus memory mapped I/O

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Suresh Chand · Accepted Answer

The difference between Isolated and Memory mapped I/O are Isolated I/O Memory Mapped I/O Memory and I/O have separate address space Both have same address space All address can be used by the memory Due to addition of I/O addressable memory become less for memory Separate instruction control read and write operation in I/O and Memory Same instructions can control both I/O and Memory In this I/O address are called ports. Normal memory address are for both More efficient due to separate buses Lesser efficient Larger in size due to more buses Smaller in size It is complex due to separate separate logic is used to control both. Simpler logic is used as I/O is also treated as memory only.

Differentiate between isolated versus memory mapped I/O

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Differentiate between isolated versus memory mapped I/O

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