Understanding RC install; need map table

[Betatester]

@MrNice

I understand that for new installation I should use Meson IR. There are 2 how-to but only one is updated to CE 19 the other one not .

As stated in same post:

@anon88919003

But old format of the keymaps from CoreELEC 9 are still compatible with CoreELEC 19. But they must not have .toml extension to work properly.