three-source operations may be made destructive, meaning the target and one source address would be implicitly equal, such that one address field in the above example would not be needed, freeing up space for a
a string instruction may use a REPEAT prefix value to repeat the string instruction by a number of times specified in the count register or until a certain condition is met. The prefix value used in instruction214does not add a completely new meaning to the opcode value that follows in the...