Hello,
On Sun, Oct 11, 2020 at 01:48:34PM +0000, Michael van Elst wrote:
> tlaro...@polynum.com writes:
>
> >My keyboard is attached via usb and I set wscons with the 'fr' encoding.
>
> >Specifically, the asterisk and mu are not available (giving backslash
> >and pipe instead) while in ukbd_keydesc_fr they are mapped to position
> >50 (and backslash and pipe are not mapped in the fr patch while they
> >are not at the same place as in a qwerty US keyboard).
>
> >How are defined the positions regarding the keyboard keys map? Or where
> >can I find the physical association between the KC(n) n value and the
> >keys?
>
> USB scancodes are defined in the USB specification as "usage ids".
>
> https://usb.org/sites/default/files/hut1_2.pdf
>
> The position of a key isn't described as coordinates or graphical layout
> but as equivalent to the symbol on a (mostly) US keyboard. The USB
> specification defines many more keys than available on a standard
> keyboard.
>
> The asterisk/mu key on a regular french keyboard is equivalent to
> "Keyboard Non-US # and '" with usage id 50.
>
> The ukbd driver regularly uses the hidkbd_keydesc_fr map, which assigns
> symbols KS_asterisk and KS_mu to usage id 50. So that's fine.
>
>
> But the "Non-US" says that on a regular US keyboard there is no key with
> usage id 50. Some keyboards have an additional key above the enter key, which
> is "Keyboard \ and |" with usage id 49. It is possible that some US keyboards
> even have this in the same position as "Keyboard Non-US # and '" on Non-US
> keyboards but send usage id 49 instead of usage id 50.
>
> When you load the french keymap, there is no special handling for
> usage id 49 and you get the US keymap symbols. You can override the
> mapping for usage id 49 for a better result with wsconsctl (also
> in wscons.conf). E.g.
>
> wsconsctl -k -w map+="keycode 49 = asterisk mu"
Thank you very much! Very informative and problem solved!
Best,
--
Thierry Laronde <tlaronde +AT+ polynum +dot+ com>
http://www.kergis.com/
http://www.sbfa.fr/
Key fingerprint = 0FF7 E906 FBAF FE95 FD89 250D 52B1 AE95 6006 F40C
