Department of Computer Scien

ce and Information Engineering

National Cheng Kung University, TAIWAN

HANEL

ROTATE INSTRUCTIONAND DATA

SERIALIZATION

SWAP

SWAP A‰It swaps the lower nibble and the higher nibble

¾In other words, the lower 4 bits are put into the higher 4 bits and the higher 4 bits are put into the lower 4 bits

‰SWAP works only on the accumulator (A)

D7-D4

before :after :

D3-D0

D3-D0D7-D4