Problem 1
For Exercises 1-15, mark the answers true or false as follows: A. True B. False Arithmetic can be performed in the instruction register.
Problem 6
For Exercises 1-15, mark the answers true or false as follows: A. True B. False The program counter and the instruction register are two names for the same place.
Problem 10
For Exercises 1-15, mark the answers true or false as follows: A. True B. False The branch instruction, BR, branches to the location specified in the operand specifier.
Problem 14
For Exercises 1-15, mark the answers true or false as follows: A. True B. False All Pep/9 instructions use 3 bytes.
Problem 15
For Exercises 1-15, mark the answers true or false as follows: A. True B. False At least one branching instruction is required in a loop.
Problem 21
Exercises 21-60 are programs or shortanswer questions. What does it mean when we say that a computer is a programmable device?
Problem 22
Exercises 21-60 are programs or shortanswer questions. List five operations that any machine language must include.
Problem 24
Exercises 21-60 are programs or shortanswer questions. What is a virtual machine? Discuss this definition in terms of the Pep/9 computer.
Problem 29
Exercises 21-60 are programs or shortanswer questions. Distinguish between the IR (instruction register) and the \(\mathrm{PC}\) (program counter).
Problem 32
Exercises 21-60 are programs or shortanswer questions. Some Pep/9 instructions are unary, taking only l byte. Other instructions require 3 bytes. Given the instructions that we have covered in this chapter, would it be useful to define instructions that require only 2 bytes?
