Isolated I/O and Memory Mapped I/O

List Out The Differences Between Isolated I/o And Memory Mapped I/o.?

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ISOLATED I/O
The devices of I/O are treated in a separate domain as compared to memory.
A total of 1mb address space is allowed for memory applications.
In order to maximize the I/O operations ( isolated ) separate instructions are always provided to perform these operations.
One of the disadvantages is that the data transfer only occurs between the I/O port and the AL, AX registers.

MEMORY MAPPED I/O
In such scenarios the devices (I/O) are treated as a part of the memory only.
Complete 1mb of memory cannot be used as they are a part of the memory.
In case of memory mapped I/O operations no external separate instructions are required.
There is data transfer restriction in case of memory mapped instructions.

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