14.2.2. Control Instructions for Addressing Modes

Try these first

1. 1.

   Define addressing mode.

   Hint

   Think about how computers access data.

2. 2.

   What is the difference between immediate and direct addressing modes?

   Hint

   Consider where the operand is located.

3. 3.

   What defines an addressing mode?

   • Method of accessing data
   • Type of CPU
   • Speed of the processor

   Hint

   What is the purpose of addressing modes?

4. 4.

   True or False: Immediate addressing mode requires more execution steps than direct addressing mode.

   • True
   • False

   Hint

   Which mode is simpler?

5. 5.

   Design an instruction set for a simple processor that includes both immediate and indirect addressing modes, describing how each mode affects instruction execution.

   Hint

   Think about how simplification can aid performance.

6. 6.

   Compare the efficiency of a program that uses immediate addressing mode extensively versus one that uses indirect addressing mode. What implications does this have for performance?

   Hint

   Consider how often data is reached.