What is the difference between an arithmetic shift and a logical shift? Explain what it means for an instruction set to be orthogonal. What is an address mode? Give examples of immediate, direct,...

What is the difference between an arithmetic shift and a logical shift? Explain what it means for an instruction set to be orthogonal. What is an address mode? Give examples of immediate, direct, register, indirect, register indirect, and indexed addressing. How does indexed addressing differ from based addressing?