Re: Keyboard delay and repeat rate

From: Russell King (rmk@arm.linux.org.uk)
Date: Wed Apr 05 2000 - 13:48:15 EST


Geert Uytterhoeven writes:
> > When you have a tty open, the characters that you read from the device depend
> > on the mode that the VC is in. Eg, in RAW mode, you see the raw codes from
> > the keyboard. These (should be) untranslated, and may be architecture
> > specific (the "scancodes"). However, if the VC is in MEDIUM mode, you get
> ^^^^^^
> COOKED

We're both wrong - the modes are:

        K_RAW
        K_MEDIUMRAW
        K_XLATE
        K_UNICODE

in increasing levels of translation, but this is OT.

> Keycodes are bytes where the MSB indicates key up or down. For each keyboard
> event exactly one keycode is sent, while there may be multiple scancodes for a
> keyboard event (e.g. on PC, where extended keys are prefixed). On Amiga,
> keycode == scancode.

However, scancodes may not have any significance to the MSB.
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