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Re: N-key rollover keyboards
From: |
Dmitry Alexandrov |
Subject: |
Re: N-key rollover keyboards |
Date: |
Mon, 03 Aug 2020 21:17:42 +0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Alan Davis <alan3davis@gmail.com> wrote:
> On Sun, Aug 2, 2020, 10:04 Dmitry Alexandrov <dag@gnui.org> wrote:
>> FWIW, N-key rollover is not really about USB or protocols; itʼs about
>> circuit of the keyboard.
>>
>> It does matter, when you reconfigure modifiers in a human-friendly way, that
>> is move one of the ‘controls’ (normally, the left one) closer to ‘space’ —
>> under your thumb — (ctrl:swap_lalt_lctl setxkbmap(1) -option or equivalent).
>>
>> Then, on many ordinary keyboards few combinations, that are in use in Emacs,
>> are indeed get ‘ghosted’. And M-C-b with inner M- and C- is a very likely
>> variant.
>>
>> Two-key chords can never be affected, of course.
>
> 'ghosted'?
Yes. https://www.bing.com/search?q=key+ghosting
> Does this mean these apparently problematic combinations require N-key
> rollover?
No, not necessary. Much cheaper redesign of a circuit would suffice.
> I am also using org-mode with several multiple-key chords. I cannot remember
> any instance where these have been a problem.
So, evidently, either your keyboards are not affected or youʼve just never
bumped into affected chords. Do an exhaustive check, if you are concerned:
(while t
(let ((key (read-key)))
(message "%s: ok\n" (format-kbd-macro (vector key)))
(when (eql ?\C-g key) (keyboard-quit))))
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- issue with keyboard input for multiple keys Ctrl-b / nkey rollover?, Alan Davis, 2020/08/02
- Re: issue with keyboard input for multiple keys Ctrl-b / nkey rollover?, 2QdxY4RzWzUUiLuE, 2020/08/02
- Re: issue with keyboard input for multiple keys Ctrl-b / nkey rollover?, Yuri Khan, 2020/08/02
- Re: issue with keyboard input for multiple keys Ctrl-b / nkey rollover?, Perry Smith, 2020/08/02
- Re: N-key rollover keyboards (was: issue with keyboard input for multiple keys Ctrl-b / nkey rollover?), Dmitry Alexandrov, 2020/08/02
- Re: N-key rollover keyboards (was: issue with keyboard input for multiple keys Ctrl-b / nkey rollover?), Alan Davis, 2020/08/02
- Re: N-key rollover keyboards,
Dmitry Alexandrov <=
- Re: N-key rollover keyboards, Alan Davis, 2020/08/03
- Re: N-key rollover keyboards, 2QdxY4RzWzUUiLuE, 2020/08/03
- Re: N-key rollover keyboards, Alan Davis, 2020/08/04
- Re: N-key rollover keyboards, Yuri Khan, 2020/08/04
- Re: N-key rollover keyboards, Dmitry Alexandrov, 2020/08/04
- Re: N-key rollover keyboards, Yuri Khan, 2020/08/04
- Re: N-key rollover keyboards, Dmitry Alexandrov, 2020/08/04
- Re: N-key rollover keyboards, 2QdxY4RzWzUUiLuE, 2020/08/04
- Re: N-key rollover keyboards, Dmitry Alexandrov, 2020/08/04