1. What are the main functions of the CPU? 2. How is the ALU related to the CPU? What are its main functions? 3. Explain what the CPU should do when an interrupt occurs. Include in your answer the method the CPU uses to detect an interrupt, how it is handled, and what happens when the interrupt has been serviced. 4. How many bits would you need to address a 2M X 32 memory if a) the memory is byte addressable? b) the memory is word addressable? 5. How many bits are required to address a 4M X 16 main memory if a) main memory is byte addressable? b) main memory is word addressable? 6. How many bits are required to address a 1M X 8 main memory if a) main memory is byte addressable? b) main memory is word addressable? 7. Suppose we have 4 memory modules instead of 8 in Figures 4.6 and 4.7. Draw the memory modules with the addresses they contain using: a) High-order interleaving b) Low-order interleaving 8. How many 256x8 RAM chips are needed to provide a memory capacity of 4096 bytes? a) How many bits will each address contain? b) How many lines must go to each chip? c) How many lines must be decoded for the chip select inputs? Specify the size of the decoder 9. Suppose that a 2M X 16 main memory is built using 256K X 8 RAM chips and memory is word addressable. a) How many RAM chips are necessary? b) How many RAM chips are there per memory word