Explain the functioning of Programmed I/O. What are its advantages and

Question

Explain the functioning of Programmed I/O. What are its advantages and disadvantages? For what kind of architecture would you like to use Programmed I/O? Explain when an I/O processoris needed in a computer system.

30 Nov 2023

Answer :

Word Count : 531

Functioning of Programmed I/O:

Programmed I/O (Input/Output) is a method of data transfer between the central processing unit (CPU) and peripherals where the CPU manages the entire data transfer process. In Programmed I/O, the CPU issues commands to the I/O device, waits for the device to complete the operation, and then proceeds with the next instruction. This process is entirely controlled by the CPU, and there is no direct involvement of an interrupt mechanism.

The basic steps involved in Programmed I/O are as follows:

1. Initiation: The CPU sends a command to the I/O device, specifying the operation to be performed (read or write).

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