计算机启动过程：bios -> grub -> kernel

bios

固件 ROM

https://github.com/coreboot/seabios

• /opt/homebrew/Cellar/qemu/9.1.0/share/qemu/bios-256k.bin

进入 bios， 参考 https://www.qemu.org/docs/master/system/qemu-manpage.html qemu-system-x86_64 -boot menu=on,splash-time=5000

bootloader - grub

find / | grep “boot.img” /usr/lib/grub/i386-pc/pxeboot.img /usr/lib/grub/i386-pc/diskboot.img /usr/lib/grub/i386-pc/boot.img /usr/lib/grub/i386-pc/lnxboot.img /usr/lib/grub/i386-pc/cdboot.img

kernel

vga https://people.cs.umass.edu/~verts/cmpsci201/Mode_13_draft2.pdf

VGA programming lessons https://en.wikipedia.org/wiki/Mode_13h

https://asm.inightmare.org/index.php?tutorial=1&location=11

References

• https://github.com/dibingfa/flash-linux0.11-talk