ref: ce64a58e70f0d6848ce946f99de5ca3059a0fb1f
dir: /sys/src/9/port/bootfs.proto/
$cputype bin 9660srv awk bind bzfs cat dd disk fdisk kfs prep partfs dossrv echo cwfs64x grep gunzip hoc ip ipconfig ls mkdir mount ramfs rc read rm sed seq sleep srv test unmount usb usbd xd rc lib rcmain local.rc 555 sys sys ../boot/local.rc tcp.rc 555 sys sys ../boot/tcp.rc bin fstype diskparts bootrc 555 sys sys ../boot/bootrc tmp