1. Computer Hardware & Operation Northern College Diploma Philip Bird

2. Computer Fundamentals Philip Bird NOT Gate NOT Rule: The output is the opposite of the input. InOut 01 10 0 1 10

3. Computer Fundamentals Philip Bird 001001 111111 AND Gate AND Rule: The output is 1 if all the inputs are 1. In1In2Out 000 010 100 111 000000

4. Computer Fundamentals Philip Bird 011011 111111 000000 OR Gate OR Rule: The output is 1 if any of the inputs are 1. In1In2Out 000 011 101 111

5. Computer Fundamentals Philip Bird 101101 000000 011011 XOR Gate XOR Rule: The output is 1 if either of the inputs are 1 but not both. In1In2Out 000 011 101 110

6. Computer Fundamentals Philip Bird Logic in Hardware 1906 Lee de Forrest The Valve 1947 Bardeen and Brattain Transistor 1958 Jack Kilby Integrated Circuit 1971 Ted Hoff Microprocessor

7. 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) MDAXU 00000 00110 01010 01110 10000 10111 11011 11111 AND OR M D A U X

8. Computer Fundamentals Philip Bird Another Example AND OR A B C NOT AND ABXYZC 00 01 10 11 Y Z X 00010001 11101110 01110111 01100110

9. Computer Fundamentals Philip Bird Another Example AND A B C NOT ABXYZC 00 01 10 11 Y Z X 11001100 10101010 10001000 01110111

10. 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.

11. Computer Fundamentals Philip Bird Control Switches & Masks 11011101 00000000 0 10111011 0 1 0 0 01000100

12. Computer Fundamentals Philip Bird Addition Circuits In1In2CarrySum 0000 0101 1001 1110

13. 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.

14. Computer Fundamentals Philip Bird Answers I will have another beer if I have the money (M) and can stand at the bar (S) or if someone else is buying (B) BMSXU 00000 00100 01000 01111 10001 10101 11001 11111 OR AND B M S U X

15. Computer Fundamentals Philip Bird Answers SRQ 00 10 00 01 00 0 1 0 0 1