Hi BA!

Now I'll show you how to design/project (not write!) bootloader.

1. You need to think in which language you'll write it. I recommend Assembler.

2. Now, think - do you want one stage, very simple bootloader - or - two staged.

Look:
Onestage:

• Bootloader starts
• Looking for partitions
• Loading kernel

Onestage bootloader can't have graphical GUI, but twostaged can.

Twostaged:

• Bootloader starts
• Searches for stage 2 or stage 1.5
• Loads it
• Stage 1.5 loads stage 2 from HDD (OPTIONAL/Like in GRUB)
• Stage 2 loads GUI etc.

Stage 1 is written at sector 0; stage 1.5 is written (in GRUB) after sector 0, but before the partition table start.

Windows Bootloader is twostaged, but it has stage 2 on partition.

3. You should think about the FS you will implement, for beginners I recommend FAT12.

4. Now you should code it

Useful post!