$ waxmill vm-add-lpc-device \
  --machine de17174a-1b3c-4ebc-80af-cb239aa18cbd \
  --device-slot 0:4:0 \
  --add-backend stdio;com1

$ waxmill vm-add-lpc-device \
  --machine de17174a-1b3c-4ebc-80af-cb239aa18cbd \
  --device-slot 0:4:0 \
  --add-backend file;bootrom;/usr/local/share/uefi-firmware/BHYVE_UEFI.fd

$ waxmill vm-add-lpc-device \
  --machine de17174a-1b3c-4ebc-80af-cb239aa18cbd \
  --device-slot 0:4:0 \
  --add-backend nmdm;com1
