0.91-beta (1994-01)
rootfs-file-format: ustar(POSIX.1-1988) + zstd (v0.8+)
boot-floppy-img-format: DOS/MBR boot sector + zstd(v0.8+)
On modern Linux distributions, you can't run it directly as a chroot/nspawn container.
check XXH3 hash
apt install xxhash
xxhsum -H3 0.91_rootfs_i386*.tar.zst