6.3.2. Memory-Mapped I/O

Try these first

1. 1.

   What does Memory-Mapped I/O allow the CPU to do?

   Hint

   Think about how programming interfaces with hardware.

2. 2.

   What is a frame buffer?

   Hint

   It holds data meant for visualization.

3. 3.

   What is the primary purpose of a frame buffer?

   • To store CPU instructions
   • To hold pixel data for display
   • For network communication

   Hint

   Consider what graphics hardware uses for output.

4. 4.

   Which of the following parameters can be adjusted via control registers in MMIO?

   • Processor speed
   • Memory size
   • Display resolution

   Hint

   Remember what settings directly affect how visuals are presented.

5. 5.

   Describe a scenario where Memory-Mapped I/O might fail and how the system would behave.

   Hint

   Think about overlapping address ranges and their impacts.

6. 6.

   How could you implement a new VGA parameter adjustment method without using MMIO?

   Hint

   Consider the trade-offs of complexity versus speed.