ref: d54bc38234b9ee339dc91b6d0c1d7bec27c4928f
dir: /sys/src/9/port/bootfs.proto/
$cputype bin 9660srv 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 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