KNULLI's RetroArch is Batocera's build with its core downloader on.
Its armv7 hard-float boards (atm7039, r16, rk3128) fetch from buildbot
linux/armhf: atm7039's shipped retroarch.cfg hides the menu entry but
leaves the URL, and Settings offers the entry back. Its aarch64 boards
get no buildbot URL. ecwolf, squirreljme, stella2014 and vemulator come
back as installable cores, and openmsx, which no buildbot list carries,
stays out.
Batocera and KNULLI write the image name, not the board, to the card's board file (post-image-script.sh). The target scraper now records each board's images from Config.in, the target lists carry them, and the installer maps a card's image to its board. KNULLI's boot/knulli.board is read too.
KNULLI builds per board on Batocera's Kconfig model from its own tree (knulli-cfw/knulli-linux at the tag platforms/knulli.yml pins): configs/knulli-*.board, package/system/knulli-system/Config.in, knulli-es-system/es_systems.yml and the knulli-cfw/buildroot submodule. Ten boards, the armhf library builds excluded.
Abdessamad Derraz