Messages in this thread | | | Date | Thu, 12 Dec 2002 02:01:16 +0100 | From | Andries Brouwer <> | Subject | Re: PATCH: Four function buttons on DELL Latitude X200 |
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On Tue, Dec 10, 2002 at 10:34:44PM +0100, Pavel Machek wrote:
> > The PC only has so many possible keycodes (with E0 and E1 it's still > > in the sub-300 range.) It won't fit within 128, but I would really > > like an algorithmic mapping from scancodes to keycodes so we don't > > continue to have this problem. > > > > For example, using a 16-bit keycode model: > > > > > > Scancode Keycode (binary) > > mxxxxxxx m0000000 0xxxxxxx > > E0 mxxxxxxx m0000000 1xxxxxxx > > E1 mxxxxxxx yyyyyyyy mxxxxxxx yyyyyyyy > > > > m = make/break bit > > Well, nothing prevents keyboard manufacturers from using 0xe2 as a > prefix, too. I think there are really *weird* keyboards out there. > > Pavel
Indeed. See, for example,
http://www.win.tue.nl/~aeb/linux/kbd/scancodes-2.html#ss2.18
for a keyboard that uses 0x80 as a prefix. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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