IA32
====
FAT12                   FAT16             FAT32
bootsect.asm            bs16.asm          bs32.asm
start.asm               start16.asm       start32.asm
         \                   |                 /
          \                  |                /
                         efi32.asm

X64
===
FAT12                   FAT16             FAT32
bootsect.asm            bs16.asm          bs32.asm
start64.asm             st16_64.asm       st32_64.asm
         \                   |                 /
          \                  |                /
                         efi64.asm

MBR
===
Mbr.asm


GPT
===
Gpt.asm