Consider a computer system that contains an I/O module controlling a simple keyboard/printer teletype. The following registers are contained in the processor and connected directly to the system bus: INPR: Input register – 8 bits OUTR: Output register – 8 bits FGI: Input flag – 1 bit FGO: Output flag – 1 bit IEN: Interrupt enable – 1 bit Keystroke input from the teletype and printer output to the teletype are controlled by the I/O module.  The teletype is able to encode an alphanumeric symbol to an 8-bit word and decode an 8-bit word into an alphanumeric symbol. Describe how the processor, using the first four registers listed in the problem can achieve I/O with the teletype. Describe how the function can be performed more efficiently by also employing IEN.

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Computer Fundamentals

The computer is termed computation. For calculating or computing something the device that has been used is known as the computer. Or we can say that for performing a fast arithmetic operation the device that has been used is a computer. Storing, processing, and retrieving are the main features of a computer.