1.

By which instruction does the switching of registers take place?(a) Instruction opcodes(b) AXX instruction(c) EXX instruction(d) Register instructionI got this question during an interview.My question comes from Microprocessor of Embedded System topic in chapter Embedded System of Embedded Systems

Answer»

Correct option is (c) EXX instruction

Explanation: Only one SET of REGISTERS can be USED at one time and the switching of registers and data transfer is performed by the EXX instruction.



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