Assembly

Question 1

Define INP

Answer 1

Inputs a value and stores it in the accumulator

Question 2

Define OUT

Answer 2

Displays the contents of the accumulator

Question 3

Define STA …

Answer 3

Moves the contents of the accumulator to a specified RAM address

Question 4

Define LDA …

Answer 4

Moves the contents of a specified RAM address to the accumulator (LoaD Accumulator)

Question 5

Define ADD …

Answer 5

Adds the contents of the accumulator to the contents of the specified RAM address

Question 6

Define SUB …

Answer 6

Subtracts the contents of the accumulator from the contents of a specified RAM address

Question 7

Define BRA

Answer 7

Jumps to a specified part of the code- used to
loop continuously (BRanch Always)

Question 8

Define … DAT

Answer 8

Defines variables previously used in the code e.g the RAM addresses in the STA command. Always at the end of the code

Question 9

Define HLT

Answer 9

Stops the processor

Question 10

Code to add two numbers

Answer 10

INP
STA a
INP
ADD a
OUT
HLT
a DAT

Question 11

Code to subtract a from b

Answer 11

INP
STA a
INP
STA b
LDA a
SUB b
OUT
HLT
a DAT
b DAT

Question 12

3 benefits of assembly language

Answer 12

Less memory and execution time
Interacts directly with hardware
Suitable for time critical processes