ref: 2f4e6dd1a8b367044948f75f62b51aae2a944dd2
dir: /sys/src/9/port/bootfs.proto/
$cputype bin 9660srv auth factotum awk bind bzfs cat dd disk fdisk kfs prep dossrv echo cwfs64x grep gunzip hoc ip ipconfig ls mount ramfs rc read rm sed seq srv test unmount usb usbd xd rc lib rcmain conf.rc 555 sys sys ../boot/conf.rc local.rc 555 sys sys ../boot/local.rc menu.rc 555 sys sys ../boot/menu.rc tcp.rc 555 sys sys ../boot/tcp.rc bin diskparts bootrc 555 sys sys ../boot/bootrc tmp