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Q. Explain Arithmetic Data Processing Instructions?
These instructions carry outlogical and arithmetic operations on data.
Arithmetic: The four fundamental operations are SUB, ADD,MUL and DIV. An arithmetic instruction may operate on fixed-point data, decimal or binary data etc. The other likely operations involve a range of single-operand instructions for illustration ABSOLUTE, NEGATE, INCREMENT, DECREMENT.
Execution of arithmetic instructions requires bringing in the operands in operational registers so that data can be processed by ALU. This type of functionality is implemented usually within instruction execution steps.
Q. Interfacing of keyboards? The keyboard employs a special Input/output port which is similar to a serial port however doesn't explicitly follow the RS-232 serial port standar
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