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| Section | Page |
|---|---|
| Title & Contents | 1 |
| Notes | 2 |
| Block Diagram & Signals | 3 |
| Timing Diagram | 4 |
| Timing & Keyboard | 5 |
| Control - Part 1 | 6 |
| Control - Part 2 | 7 |
| Registers & Arithmetic | 8 |
| Display & Power Supply | 9 |
| IC Pinouts | 10 |
| Downloading and printing |
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Photos
| Schematic
Casio121-B Calculators | Integrated Circuits | Displays | Simulations EEC |