1. Memory and I/O Subsystems

2. Memory Subsystems • Memory hierarchy • Memory types • RAM • Static • Dynamic • ROM • Size designations: “A x B” • A words of memory log2A address connections • B bits per word B data connections

3. Input/Output CPU Memory 32 Data Bus System Bus 32 Address Bus Control Bus

4. RAM Subsystem RAM Cells Address Decoder Memory,I/O Data Bus System Bus Address Bus Control Bus

5. I/O Interface Control I/O Device Status Data Address Decoder Data Bus System Bus Address Bus Control Bus