26.4.2. Zero Flag Handling

Try these first

1. 1.

   What does the zero flag indicate?

   Hint

   Think of operations that might lead to zero.

2. 2.

   Define a micro routine.

   Hint

   Remember the relationship between macro and micro.

3. 3.

   What does a zero flag signify in micro programming?

   • Data usage
   • Result is zero
   • Execution status

   Hint

   Recall operations that would trigger the zero flag.

4. 4.

   True or False: Implicit jumps are explicitly programmed within a micro routine.

   • True
   • False

   Hint

   Think about how jumps are determined in your program.

5. 5.

   Devise a small micro routine that utilizes both implicit and explicit jumps based on a zero flag check. Discuss how your routine decides the next instruction.

   Hint

   Incorporate conditions directly in your code.

6. 6.

   Analyze a code snippet that uses a zero flag check and suggest optimizations that could improve its efficiency.

   Hint

   Look for repetitive patterns in the code.