1.2 Define the two main categories of processor registers.
1.3 In general terms, what are the four distinct actions that a machine instruction can specify?
1.4 What is an interrupt?
1.5 How are multiple interrupts dealt with?
1.10 In general, what are the strategies for exploiting spatial locality and temporal locality?
Problems (10 points each)
1.2 The program execution of Figure 1.4 is described in the text using six steps. Expand this
description to show the use of the MAR and MBR.
1.3 Consider a hypothetical 32-bit microprocessor having 32-bit instructions composed of two
fields. The first byte contains the opcode and the remainder an immediate operand or an
operand address.
a. What is the maximum directly addressable memory capacity (in bytes)?
b. Discuss the impact on the system speed if the microprocessor bus has
1. a 32-bit local address bus and a 16-bit local data bus, or
2. a 16-bit local address bus and a 16-bit local data bus.
c. How many bits are needed for the program counter and the instruction register?
