Distinguish between the memories mapped I/O peripheral I/O?

Memory Mapped I/O	Peripheral MappedI/O
16-bit device address	8-bit device address
Data transfer between any general-purpose register and I/O port.	Data is transfer only between accumulator and I.O port
The memory map (64K) is shared between I/O device and system memory.	The I/O map is independent of the memory map; 256 input device and 256 output device can be connected
More hardware is required to decode 16-bit address	Less hardware is required to decode 8-bit address
Arithmetic or logic operation can be directly performed with I/O data	Arithmetic or logical operation cannot be directly performed with I/O data