Minimal Glossary

Bootloader

Program that loads the kernel into memory and transfers control to its entrypoint.

Specification used by GRUB to pass boot information to the kernel (for example memory map).

64-bit execution mode on x86_64 CPUs.

Table telling the CPU which handler to call for each interrupt/exception.

Hardware interrupt (for example timer or keyboard).

Controlled request from task/user code to kernel services.

Physical memory block (4 KiB in this project).

Allocator that assigns and frees physical page frames.

Simple disk I/O mode using I/O ports.

Classic on-disk filesystem, used here in a minimal implementation.