Question

In Memory Mapped I/O the I/O devices can now be accessed using any ____
A.Data instruction
B.I/O instruction.
C.Memory Instruction.
D.None of the Above

Answer 1

Answer:

b] i/o instruction

Explanation:

While using memory mapped IO, OS allocates buffer in memory and informs I/O device to use that buffer to send data to the CPU. I/O device operates asynchronously with CPU, interrupts CPU when finished. ... Memory mapped IO is used for most high-speed I/O devices like disks, communication interfaces.