computer hardware & operation northern college diploma philip bird
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Computer Hardware & Operation
Northern College DiplomaPhilip Bird
Computer Fundamentals Philip Bird
NOT Gate
NOT
Rule:
The output is the opposite of the input.
In Out
0 1
1 0
0 1
1 0
Computer Fundamentals Philip Bird
0
0
1
1
1
1
AND Gate
AND
Rule:
The output is 1 if all the inputs are 1.
In1 In2 Out
0 0 0
0 1 0
1 0 0
1 1 1
0
0
0
Computer Fundamentals Philip Bird
0
1
1
1
1
1
0
0
0
OR Gate
OR
Rule:
The output is 1 if any of the inputs are 1.
In1 In2 Out
0 0 0
0 1 1
1 0 1
1 1 1
Computer Fundamentals Philip Bird
1
0
1
0
0
0
0
1
1
XOR Gate
XOR
Rule:
The output is 1 if either of the inputs are 1 but not both.
In1 In2 Out
0 0 0
0 1 1
1 0 1
1 1 0
Computer Fundamentals Philip Bird
Logic in Hardware
1906 Lee de Forrest
The Valve
1947 Bardeen and Brattain
Transistor
1958 Jack KilbyIntegrated Circuit
1971 Ted Hoff
Microprocessor
Computer Fundamentals Philip Bird
A Non-Computing Logic Problem
To do teacher training at University I will need to do Maths GCSE (M) and get either the Diploma (D) or the Access to HE Certificate (A)
M D A X U
0 0 0 0 0
0 0 1 1 0
0 1 0 1 0
0 1 1 1 0
1 0 0 0 0
1 0 1 1 1
1 1 0 1 1
1 1 1 1 1
AND
OR
M
D
A
U
X
Computer Fundamentals Philip Bird
Another Example
AND
OR
A
B
C
NOT
AND
A B X Y Z C
0 0
0 1
1 0
1 1
Y
Z
X
0
0
0
1
1
1
1
0
0
1
1
1
0
1
1
0
Computer Fundamentals Philip Bird
Another Example
AND
A
B
CNOT
A B X Y Z C
0 0
0 1
1 0
1 1
Y
ZX
1
1
0
0
1
0
1
0
1
0
0
0
0
1
1
1
NOT
NOT
Computer Fundamentals Philip Bird
Computer Logic Circuits
Made up of logic gates.Distinct units within the CPU doing specific jobs.Simple in operation – clock speed gives computers the power.
Computer Fundamentals Philip Bird
Control Switches & Masks
1
1
0
1
0
0
0
0
0
1
0
1
1
0 1 0 0
0
1
0
0
Computer Fundamentals Philip Bird
Addition Circuits
In1 In2 Carry
Sum
0 0 0 0
0 1 0 1
1 0 0 1
1 1 1 0
Computer Fundamentals Philip Bird
Summary
What are the rules of the logic gates?What is a logic circuit?Why is clock speed so important?Use Circuit Shop to produce the task examples.
Computer Fundamentals Philip Bird
AnswersI will have another beer if I have the money (M) and can stand at the bar (S) or if someone else is buying (B)
B M S X U
0 0 0 0 0
0 0 1 0 0
0 1 0 0 0
0 1 1 1 1
1 0 0 0 1
1 0 1 0 1
1 1 0 0 1
1 1 1 1 1
OR
AND
B
M
S
U
X
Computer Fundamentals Philip Bird
Answers
S R Q
0 0
1 0
0 0
0 1
0 0
0
1
0
0
1