What are the Advantages of memory mapped I/O scheme over I/O mapped I

1.	What are the Advantages of memory mapped I/O scheme over I/O mapped I/O scheme ?
Answer» Advantages of memory mapped I/O scheme over I/O mapped I/O scheme: 1. The IO read write instructions in I/O mapped I/O require the transfer from an IO port to accumulator. The same data is then transferred to other registers from accumulator thus wasting one instruction and time. But with memory mapped scheme device can do transaction with any of the registers. 2. The address modes of memory mapped scheme is more powerful than IO mapped IO. So more efficient handling of IO devices can be achieved if they are interface memory mapped IO mechanism.

What are the Advantages of memory mapped I/O scheme over I/O mapped I/O scheme ?

Answer»

Advantages of memory mapped I/O scheme over I/O mapped I/O scheme:

1. The IO read write instructions in I/O mapped I/O require the transfer from an IO port to accumulator. The same data is then transferred to other registers from accumulator thus wasting one instruction and time. But with memory mapped scheme device can do transaction with any of the registers.

2. The address modes of memory mapped scheme is more powerful than IO mapped IO. So more efficient handling of IO devices can be achieved if they are interface memory mapped IO mechanism.

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