BIOS GPT booting

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Goals

Fit GPT bios boot code in only MBR if possible. If not, use GRUB as an example of how allocate extra sectors (GRUB bios boot partition).

Protective MBR will have one entry of type 0xEE.


How to calculate crc32 without tables https://medium.com/@nxtchg/crc-32-without-lookup-tables-1682405aa048