Operand is inside the instruction

Address of the operand is outside the instruction

Register containing the address of the operand is specified inside the instruction

Location of the operand is implicit.

8251

8250

8253

8088

Assembler directives

Instructions in any program that have corresponding machine code instruction

Instruction in any program whose absence will not change the output for any input

None of these

n

n+1

n-1

independent of n

Direct

Register

Register indirect

Index