Question

Write any three difference points between Memory Mapped I/0 and
I/O Mapped I/0 Addressing Scheme.

Answer 1

	Memory mapped I/O	I/O mapped I/O
1	I/O is assigned to the separate address space of memory.	I/O is assigned with same address of memory.
2	Separate control signal is not required.	It is required like IO/M.
3	Memory space is reduced due to insertion of I/O address.	Full memory space can be used.
4	It requires 16-bit address bus	It uses 8-bit address bus only.