[Oberon] What boot LEDs mean, point me to some docs

[D EMARD]

HI

A collegue is rying to make cleaner rework of SDRAM and cache for
oberon at ulx3s board
https://gitlab.com/pnru/ulx3s-misc/-/blob/master/oberonstation/ob_video.tgz

Old code which works has this boot LED sequence (or bits):
D7+D1, D7+D2, D5 ... then video, mouse and kbd work

New code under development boots
D7+D1, D7+2 and stays there

Need some description or pointing to docs describing
what LED combinations mean