I/O Two Main Jobs of Compter I/O (대부분이므로 굉장히 중요하다) ex. web browsing, file editing, youtube, games, ... computing I/O Type polling(busy-waiting) reading the status register repeatedliy until the busy bit becomes clear. interrupt CPU has a wire called the interrupt-request line if CPU detects an interrupt, ISR로 점프해서 인터럽트를 처리한다. ISR의 주소는 interrupt vector table에 정의되어 있다. DMA (Direct Memory Access) u..