What are the two different I/O processing techniques?

Question

Are there three or two i/o processing techniques?

Answer 1

Hey Jay,

OLD TWO

Memory Mapped (DMA)
Input / Output (IRQ)

STANDARDS are IESA, PCI

NEW THREE

Signals, (Software handlers)
Messages, (Messeging)
Shared Memory (Memory Selectors)

STANDARDS are POSIX's

Now there are advanced techniques.

Call SOLID STATE DEVICE I/O
STANDARD is USB

DHANANJAY PATEL

Answer 2

DHANANJAY PATEL thank you for your response