The plan isβ¦
- light switch
- logic gates
- flip-flops
The plan isβ¦
- light switch
- logic gates
- flip-flops
- RAM
The plan
- light switch π
- logic gates
- flip-flops
- RAM
The plan
- light switch
- logic gates π
- flip-flops
- RAM
AND gate
AND gate
AND gate
AND gate
AND gate
AND gate
| A | B | OUT |
|---|---|---|
| 0 | 0 | 0 |
| 1 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 1 | 1 |
AND gate
| A | B | OUT |
|---|---|---|
| 0 | 0 | 0 |
| 1 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 1 | 1 |
Our first building block
π
OR gate
OR gate
OR gate
OR gate
OR gate
OR gate
| A | B | Out |
|---|---|---|
| 0 | 0 | 0 |
| 1 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 1 | 1 |
NOT gate
(inverter)
NOT gate
| IN | Out |
|---|---|
| 0 | 1 |
| 1 | 0 |
NOR gate
NOR gate
NOR gate
| A | B | Out |
|---|---|---|
| 0 | 0 | 1 |
| 1 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 1 | 0 |
OR gate
| A | B | Out |
|---|---|---|
| 0 | 0 | 0 |
| 1 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 1 | 1 |
NOR gate
| A | B | Out |
|---|---|---|
| 0 | 0 | 1 |
| 1 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 1 | 0 |
The plan
- light switch
- logic gates
- flip-flops π
- RAM
Flip-flop
Flip-flop
Flip-flop
Flip-flop
Flip-flop
Flip-flop
Second building block!
π
Edge-triggered D type latch
The plan
- light switch
- logic gates
- flip-flops
- RAM π
We've build a RAM!
π
Recap
π logic gates
π flip-flops and latches
π RAM
next time!
Questions?
Sources
- Code: The Hidden Language of Computer Hardware and Software
Charles Petzold - https://www.falstad.com/circuit/
- But How Do It Know? The Basic Principles of Computers for Everyone
J. Clark Scott - https://slideplayer.com/slide/14604328/
- https://www.geeksforgeeks.org/computer-organization-von-neumann-architecture/
- http://www.vias.org/albert_ecomm/aec09_telegraph_systems_004.html
- https://hackaday.com/2018/06/04/a-100th-birthday-celebration-for-the-flip-flop/
- https://www.autodesk.com/products/eagle/blog/series-vs-parallel-circuits/
visual6502.org
visual6502.org