Chapter 2

Question 1

What is the function of accumulator register

Answer 1

All mathematical and logical operations done on accumulator register. There is a central register in every processor called the accumulator.

Question 2

What are pointer/index/base registers

Answer 2

It holds the address of operand

Question 3

What is flag program/status word register

Answer 3

It has a collection of different Boolean information each bit has an independent meaning

Question 4

What is program counter instruction pointer register

Answer 4

It holds address of next instruction to be executed

Question 5

What are mnemonic

Answer 5

The symbols of plus, add extra are called mnemonic

Question 6

What is grouping of instructions

Answer 6

Instructions are categorized into groups

Question 7

What is data movement instructions group

Answer 7

They are responsible for data movement to memory and registers etc

Question 8

What is arithmetic / logic instruction group

Answer 8

They are responsible for mathematical operations

Question 9

What is program control instructions group

Answer 9

They are responsible for program execution

Question 10

What is special instructions group

Answer 10

They are responsible to change the instruction pointer, to change the flow of code.

Question 11

What is size relationship between accumulator and processor

Answer 11

The word size of a processor is defined by the width of its accumulator. A 32bit processor has an accumulator of 32 bits.

Question 12

What is Pointer, Index, or Base Register

Answer 12

The name varies from manufacturer to manufacturer, but the basic distinguishing property is that it does not hold data but holds the address of data.

Question 13

What is Flags Register or Program Status word

Answer 13

This is a special register in every architecture called the flags register or the program status word. Like the accumulator it is an 8, 16, or 32 bits register. The bits of the flags register work independently and individually.

Question 14

What is Program Counter or Instruction Pointer

Answer 14

it indicates where a computer is in its program sequence.

Question 15

What is add instruction opcode

Answer 15

152

Question 16

what are instruction groups

Answer 16

Group of the basic set of instructions is called instruction group. A grouping of these instructions makes learning a new processor quick and easy, like Data Movement Instructions, Arithmetic and Logic Instructions etc

Question 17

What is Data Movement Instructions

Answer 17

These instructions are used to move data from one place to another. These places can be registers, memory, or even inside peripheral devices.

Question 18

What is Arithmetic and Logic Instructions

Answer 18

Arithmetic instructions like addition, subtraction, multiplication, division and Logical instructions like logical and, logical or, logical xor, or complement are part of this group.

Question 19

What are Program Control Instructions

Answer 19

The instruction pointer points to the next instruction and instructions run one after the other.

Question 20

What are Special Instructions.

Answer 20

Another group called special instructions works like the special service commandos. They allow changing specific processor behaviors and are used to play with it.