Kernel development

0x00 Introduction

Commands

assemble:
```
> nasm -f bin boot.asm -o boot.bin
```
view assemled instructions:
```
> ndisasm boot.bin
```
execute binary
```
> qemu-system-x86_64 -hda ./boot.bin
```
write to drive: choose the drive properly!!! dd is a powerful command
```
> sudo dd if=./boot.bin of=/dev/sdc
```

install qemu-system-x86_64: emulator
simple bootloader
- writing a character
- writing a message
improve bootloader
- setup segment registers: DS, ES
- setup stack and stack pointer
boot on actual hardware
- handle bios parameter block - working on pc!
custom interrupts
- write custom interrupts
Makefile: automate the build process
- create make file
- handle assemble
- write message after boot sector
- fill zeros to create another sector in the virtual hard-disk (boot.bin)
Reading form the hard-disk
- using Int 13/AH=02h