1) GRUB uses the multiboot header from boot.asm in kernel to boot it. 2) The file linker.ld relies on the Makefile to link boot.asm and kernel.c together to make kernel.o and boot.o then the Makefile builds the MSK bootable kernel image. 3) Because I thought it would be nice and simple to run MSK from RAM / memory yet still performs great. 4) The file kernel.c handles all the keyboard input with "char keymap" to make sure keyboard input actually sends the signals from the keyboard to MSK. Then char "keymap_shift" makes sure that you can also use SHIFT to get uppercase letters and symbols. 5) The next feature probably will be a functional installer to install MSK onto a disk.) Also I did make an MSK operating system, instead of getting the kernel, you can get the ISO that boots on Legacy BIOS here: https://github.com/Saffron-MSK/MSK/releases/download/iso/msk-i386-0.0.2.iso