On: Busybox-based Linux distro from scratch

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The BIOS only loads a 512 byte sector, never a whole kernel. So if you want to directly boot a zImage, the first 512 bytes of the zImage would need to implement floppy sector reading loops to load the rest of the kernel block by block.

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I think you're right, it could be I used uncompressed kernels for the first example (it's been a few years...)