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2024-01-15 20:14:10 +00:00
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Semester 1/Computer Systems Internals & Linux/Week 3/Binary Subtraction.ods Normal file
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Semester 1/Computer Systems Internals & Linux/Week 3/Week 3 Computer Systems Internals.md Normal file
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## Lecture 1 (12:00) - Twos Compliment
- First field becomes -128
- Overflow happens when:
- Both numbers are positive or negative
- Sign is different to sign of input
| -128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | Output |
|------|----|----|----|---|---|---|---|--------|
| 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 10 |
| | | | | | | | | |
| 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | Invert |
| | | | | | | | 1 | 1 |
| | | | | | | 1 | | Overflow |
| 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | -10 |
-10x10 = -10 x (8+2) = (-10 x 8) + (-10 x 2)
| -128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | |
|------|----|----|----|---|---|---|---|------|
| 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | -10 |
| 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | <<< |
| | | | | | | | | |
| 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | -10 |
| 1 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | < |
| | | | | | | | | |
| 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | -80 |
| 1 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | -20 |
| 1 | 1 | | | | | | | Overflow |
| 1 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | -100 |

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Semester 1/Computer Systems Internals & Linux/Week 3/workshop3/Right/nano-test.txt Normal file
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Computer Science with Cyber Security

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Semester 1/Computer Systems Internals & Linux/Week 3/workshop3/the middle/SE/vi-test.txt Normal file
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George Wilkinson