7.3.1. Designing Micro Instructions

Try these first

1. 1.

   What is a micro instruction?

   Hint

   Think about how it relates to complex instructions.

2. 2.

   Name the four phases of the instruction cycle.

   Hint

   Recall the order of operations.

3. 3.

   What is the definition of a macro instruction?

   • A simple instruction
   • An atomic instruction executed in a clock cycle
   • A complex instruction requiring multiple clock cycles
   • A compiler directive

   Hint

   Remember the definition given in class.

4. 4.

   True or False: Micro instructions are executed over multiple clock cycles.

   • True
   • False

   Hint

   Consider the definition of micro instructions.

5. 5.

   Design a series of micro instructions for the macro instruction 'LOAD A, 3030' and explain each step in detail.

   Hint

   Break this down into fetch, decode, and execution phases.

6. 6.

   How can different addressing modes influence the design and complexity of corresponding micro instructions? Provide examples.

   Hint

   Consider the differences in execution between immediate and indirect instructions.