7. 8. 9. What are the main function of the CPU? How is the ALU related to the CPU? What are its main functions? 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. . What is a pointtopoint bus and a multipoint bus of a computer system? Sketch the schematic diagram of each bus. Why is a bus protocol important? Explain the differences between data buses, address buses, and control buses. . What is the difference between synchronous buses and nonsynchronous buses? How many hits would you need to address a 2M x 64 memory if a. The memory is byte-addressable? b. The memory is wordaddressable? How many hits are required to address a 4M X 32 main memory if a. Main memory is byteaddressable? b. Main memory is wordaddressable? A digital computer has a memory unit with 32 bits per word. The instruction set consists of 150 different operations. All instructions have an operation code part [opcodel and an address part {allowing for only one address}. Each instruction is stored in one word of memory. a. How many bits are needed for the opcode? b. How many bits are left for the address part of the instruction? c. What is the maximum allowable size for memory? d. What is the largest unsigned binary number that can be accommodated in one word of memory? A digital computer has a memory unit with 32 bits per word. The instruction set consists of 110 different operations. All instructions have an operation code part {opcodel and two address fields: one for a memory address and one for a register address. This particular system includes eight general-purpose, user-addressable registers. Registers may be loaded directly from memory, and memory may be updated directly from the registers. Direct memory-to-memory data movement operations are not supported. Each instruction stored in one word of memory. a. -low many bits are needed for the opcode? b. How many bits are needed to specify the register? -|ow many bits are left for the memory address part of the instruction? d. What is the maximum allowable size for memory