Direct
Displacement
Immediate
Implied
Index
Memory Indirect
Register
Relative
Register Indirect
Stack

___  The target is specified by the Opcode itself, example : CLC - clear carry
bit.

___  The target is a designated memory block adressed by dedicated register.
Data pushed on or popped of in First in, Last out order. Used to restore return
addresses in subroutine calls or as a quick way to make a register available
for other use.

___  The operand itself is the data of interest, treated as a constant.


___  Target data is located a register, usually named. RISC architecture
heavily dependent on this mode of addressing.

___  Operand represents an off-set value added program counter to indicate
location of next instruction to run. Usually signed and of limited range.

___  Operand specifies the memory address of the target data.


___  Address of target data stored in a register.

___  Address of target data stored in a specified memory address.

___  Uses a register that pecifies a value, usually unsigned, that is added 
to a specified memory address or register contents (base) to find the location 
of the target data.

___  Constant value specified in operand that is added to a registers contents
to identify the memory address of the target data. Offset is usually
unsigned and much smaller than the system's valid address range.