ASSEMBLY CODE

Question 1

How does assembly code relate to machine code?

Answer 1

• there is a 1:1 correspondence between assembly code and machine code
• one line in assembly code is equivalent to 1 line in machine code

Question 2

What is the assembly code mnemonic for add?

Answer 2

ADD

Question 3

What is the assembly code mnemonic for subtract?

Answer 3

SUB

Question 4

What is the assembly code mnemonic for store?

Answer 4

STA

Question 5

What is the assembly code mnemonic for load?

Answer 5

LDA

Question 6

What is the assembly code mnemonic for branch always?

Answer 6

BRA

Question 7

What is the assembly code mnemonic for branch if 0?

Answer 7

BRZ

Question 8

What is the assembly code mnemonic for branch if positive?

Answer 8

BRP

Question 9

What is the assembly code mnemonic for input?

Answer 9

INP

Question 10

What is the assembly code mnemonic for output?

Answer 10

OUT

Question 11

What is the assembly code mnemonic for end program?

Answer 11

HLT

Question 12

What is the assembly code mnemonic for data location?

Answer 12

DAT

Question 13

What is a word?

Answer 13

a fixed size piece of data

Question 14

What does the width of the address bus determine?

Answer 14

the max possible memory capacity of the system
(eg: 8 bit address bus = max no. of memory addresses = 2^8 = 256)

Question 15

What is the width of the data bus defined by?

Answer 15

the no. of wires/lines it contains

Question 16

What does it mean if the width of the data bus is the same width as a computer word?

Answer 16

data can be transferred to and from memory in a single operation

Question 17

How do the width of the address and data buses relate to assembly code?