●●● 13.1 Overview ●●●● ●●●●● ●●●● ●●●0● ●| O System of os ●●●0 o The main job of a computer is l/O o The role of the os in lo is manage and control ● o devices lo devices vary so widely in their function and speed Hard disk vs. keyboard Varied methods are needed to manage and control them These methods form the l/o subsystem of the kernel ● lO operation4 13.1 Overview ⚫ I/O System of OS ⚫ The main job of a computer is I/O ⚫ The role of the OS in I/O is manage and control ⚫ I/O devices ▪ I/O devices vary so widely in their function and speed ▪ Hard disk vs. keyboard ▪ Varied methods are needed to manage and control them ▪ These methods form the I/O subsystem of the kernel ⚫ I/O operation