grub.cfg

# this is intended to make the tdm_autoboot default to run after 5 seconds
# though it currently doesn't work as of Nov/2022.
#
set default="Detect and show boot methods>tdm_autoboot"
set timeout=5
set timeout_style=countdown

# this is the auto-detecting boot mode
#
menuentry "Target Display Mode (TinyCore, Auto-Detect USB Key)" --id tdm_autoboot {

 # try detecting our TDM boot drive, by locating a device
 # with the TINYCORE label, which will be store into the
 # ${root} variable
 search --no-floppy --set=root --label TINYCORE

 echo "'Target Display Mode' boot device found at ${root}"
 echo -n "Booting in ... "
 sleep --verbose 3 

 # reflect ${root} variable to mount the ISO file as a loopback device
 loopback loop (${root})/boot-isos/Core-remastered.iso

 # reflect to iso= kernel argument for locating
 # the ISO file on this device during boot
 #
 # the following alternative syntax should work for UUID and LABEL:
 # iso=UUID=xxxx-yyyy
 # iso=LABEL=xyz
 #
 # as we don't know the UUID, the label is key for detecting it
 #
 linux (loop)/boot/vmlinuz waitusb=10 iso=LABEL=TINYCORE nodhcp
 initrd (loop)/boot/core.gz
}