... Index registers, DI and SI, are used with data movement and string operations. Each register has a specific purpose when indexing the source and destination operands. The DI and SI pointers also ... Operand Mode: The operand is located in one of the 8 or 16 bit registers. Example of Register Operand Mode instructions would be:MOV AX,DXMOV AL,BHINC AX2. Immediate Operand Mode: The operand ... memory operand. The registers (CS, DS, ES and SS) define the seg-ments of memory that are immediately addressable for code, or instruction fetches (CS), data reads and writes (DS and ES) and stack-based...