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What are registers?
Registers are the "variables" on the CPU
Immnediate acces for the CPU
Cannot write Memory -> Memory
What can be held in registers?
Register can hold:
What can registers be used for?
Registers can be used to:
Name some registers in a 32 bit system and their function.
Name the 3 registars that contain instruction pointer, stack pointer and base Pointer. (32 bit)
How does a CPU interpret instructions?
A CPU looks at bytes, and then decides what to execute based on them.
What is the difference between big and little endian?
Big endian: The most significant byte of the data is placed at the byte with the lowest address.
Little endian: The least significant byte of the data is placed at the byte with the lowest address.
What are the 2 most important rings in the ring modle and what are their characteristics?
Ring 0: Kernel (Kernelspace)
Ring 3: Userspace
How to transit from userspace to kernelspace?
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