OH HOLY [expletive deleted]!!! I can't believe figured this out!!!!
UEFI.BIOS.Dual.Boot.txt:
References that stink: https://forums.linuxmint.com/viewtopic.php?t=223015 https://bl.ocks.org/gdamjan/05b799162e4b3e97a30d37a89fed0fa8
https://forum.level1techs.com/t/configure-grub-to-boot-legacy-and-uefi/12938...
Requirements: Fedora 29
Before installing, gparted: Wipe the target disk
create a partitin table as GPT
create a first partition as 1 Meg unformatted set the partition flag to "bios_grub"
Install Fedora 29 from a UEFI machine: remove "/home" was removed at installation and moved into "/"
--->>> PRESUMED !!! <<<--- The machine was install and booted from UEFI The machine is mounted as /dev/sda
Install the legacy BIOS boot loader:
Boot into fedora on UEFI
only installs 3 files # dnf reinstall grub2-pc
create the BIOS .cfg file # grub2-mkconfig -o /boot/grub2/grub.cfg
You made room for this by making the 1 MB partition "bios_grub" so use "--force" # grub2-install --force --removable --recheck --target=i386-pc --boot-directory=/boot /dev/sda
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ToddAndMargo