56 lines
2.5 KiB
Markdown
56 lines
2.5 KiB
Markdown
## Lecture 1 (12:00)
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### Addition
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| Binary Base | 2^7 | 2^6 | 2^5 | 2^4 | 2^3 | 2^2 | 2^1 | 2^0 |
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|-------------|-----|-----|-----|-----|-----|-----|-----|-----|
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| Decimal | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
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| Int1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
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| Int2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
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| Overflow | | | | | 1 | | 1 | |
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| Result | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 |
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| Decimal | 26 |
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### Multiplication
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| Binary Base | 2^7 | 2^6 | 2^5 | 2^4 | 2^3 | 2^2 | 2^1 | 2^0 |
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|-------------|-----|-----|-----|-----|-----|-----|-----|-----|
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| Decimal | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
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| Int1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
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| Factor | | | | | | | 1 | |
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| Result | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
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| Decimal | 6 |
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- Multiply binary shift to the left. Example is x2
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- Multiplying by non powers of 2, split and multiply.
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| Binary Base | 2^7 | 2^6 | 2^5 | 2^4 | 2^3 | 2^2 | 2^1 | 2^0 |
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|----------------|-----|-----|-----|-----|-----|-----|-----|-----|
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| Decimal | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
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| Int1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 |
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| Factor Decimal | 6 | | | | | | | |
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| Result 1 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 |
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| Result 2 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 |
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| Overflow | | | | 1 | 1 | | | |
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| Total | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 0 |
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| Denary | 114 |
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- Example of 19x6, which simplifies into `(19x4) + (19x2)`, which is shown above by doing two binary shifts and adding them together.
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## Workshop 1 (11:00)
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### CSV Manipulation
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1. How many users are in the file?
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2. Use a combination of head and tail to find the 5th line of the file
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3. how many users use /bin/sh as their shell and how many use /bin/bash
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