Subject: Re: keyboard input path questions
To: <>
From: Ignatios Souvatzis <ignatios@cs.uni-bonn.de>
List: tech-kern
Date: 07/15/2004 11:17:33
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Hi,

On Mon, Jul 12, 2004 at 08:42:27PM -0400, VaX#n8 wrote:
> Hi, I'm interested in learning about x86 keyboard input for a couple of
> reasons:
>=20
> 1) I hear that that PC keyboards are "scanned" and therefore quantize
> inter-key timing measurements.=20

Every matrix keyboard has to scan, and thus does have some sort of=20
quantization. Every serially-connected keyboard (or terminal) does this.
Async serial receivers in reality are not async, just synchrounous with
(canonically) a 16x clock... so the timing of their receive interupts
is quantized, too.

So if you're worried, you're starting late...

Regards,
	Ignatios Souvatzis

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