CS1170 Introduction to Computer Systems 23. This question is about computer hardware architecture and Input/Output operation. a) Draw a block diagram of the system organisation including: memory, CPU, control unit, registers, ALU and I/O module. The diagram should show the connection among these components (8 marks) b) A computer has a 16Mb main memory and a cache. Each cache line contains 32 bytes. The memory is byte addressable (i.e, each byte in the memory has a memory address). How many address lines are needed for the main memory? (3 marks) c) During any period of time, the processor may communicate with one or more external devices. An external device attaches to the computer by a link to an 1/0 module. Describe the functions of an 1/0 module. (5 marks) d) At the completion of a disk transfer, the disk controller interrupts the CPU to notify it that the transfer is complete and the data ready for use. Describe the steps that take place after this interrupt occurs