Grub is a bootloader for X86 machines.

The syslinux package contains a loader for floppy images that can be booted using grub. When both packages are installed, the procedure is quite straight forward:

• optionally create a subdirectory in grub's root to contain the specific stuff
• copy the memdisk binary and the desired floppy image to the above directory
• add an entry to grub's config like so:

title Boot some floppy image
kernel /dos/memdisk
initrd /dos/BOOT.IMG

Edit /etc/default/grub, add:

GRUB_DEFAULT=saved
GRUB_SAVEDEFAULT=true

Then recreate grub config:

grub2-mkconfig -o /boot/grub2/grub.cfg

This should do the trick, works at least with a recent Fedora 39.

• DOS floppy images for download (loop-mount to add custom stuff)