CS208 Introduction to Computer Systems
Friday, 7 April 2023

+ Queues debrief?

+ VS Code & mantis notes
- New Window + File->Open Recent...
- Logging in via SSH without a password
- Revisiting the VS Code debugging lab

+ Data representation: characters
    - codepoint vs. encoding
        codepoint - the integer associated with a character
        encoding - a scheme for storing codepoints in
            memory and files
    - ASCII
    - Unicode
    - encoding: UTF-16
    - byte order (UTF-16LE, UTF-16BE)
    - encoding: UTF-8
    - BOM = Byte Order Mark = 0xFEFF

+ Programming assignment for Tuesday
- Bitwise operations
- UTF-8

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+ Data representation: integers
- Two's complement integers
- Non-negative N (>= 0)?
    leftmost bit is 0
    integer is just represented in binary
- Negative N (< 0)?
    write absolute value |N| in binary
    complement all bits
    add 1
- Cool: if you do normal addition between
    two's complement integers, this weird
    scheme works