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This chapter addresses the architecture of Input-Output (I/O) modules, emphasizing their crucial role in enabling communication between peripheral devices and the CPU. It reviews the structure, functions, and design methodologies of various I/O operation modes, including programmed I/O, interrupt-driven I/O, and direct memory access (DMA). The chapter also discusses addressing schemes for I/O devices and the necessity of device controllers to manage these devices effectively.
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23.3.4
Explain The Design Issues Of Programmed I/o Transfer
This section addresses the design issues associated with programmed I/O transfer, highlighting the need for an input/output module to effectively manage different peripheral devices and their varying data formats and speeds.
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Term: I/O Module
Definition: An interface that connects peripheral devices to the CPU, managing data transfers and communications.
Term: Programmed I/O
Definition: A method of I/O transfer where the CPU is responsible for managing the data transfer process directly.
Term: Interruptdriven I/O
Definition: An I/O transfer method that allows the CPU to be interrupted by devices needing attention, improving efficiency.
Term: DMA (Direct Memory Access)
Definition: A system feature that allows peripherals to transfer data to/from memory without continuous CPU intervention.
Term: Addressing Scheme
Definition: A method used to identify and address various I/O devices connected to the CPU.