Date: Thu, 17 Aug 1995 23:19:13 +0200 (MET DST) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-current@FreeBSD.org Subject: Re: Syscons and IBM ThinkPads Message-ID: <199508172119.XAA11117@uriah.heep.sax.de> In-Reply-To: <9508171612.AA12623@cs.weber.edu> from "Terry Lambert" at Aug 17, 95 10:12:46 am
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As Terry Lambert wrote: > > Since we're in a quoting mood: > > ''The PS/2 offers yet a third alternative. Scan code set 3 ... What do you wanna tell by this? > Well, it's entirely possible to cook the scan code 2's into scan code > 1's for the benefit of X. Really, you want to cook everything into > single code key down, single code key up (up == down | 0x80) and then > cook back from there. This may be higher overhead, but then again, > keyboard input is hardly taxing on system resources. Most problems will happen with the `weird' keys (those, that happened to be key combinations on the XT), and believe me, not all keyboards do generate identical scan code sequences. You've perhaps noticed the program `kbdio' in pcvt -- it's a hacker's tool i've needed to analyze different keyboards around. If you'd like to learn about some weird sequences, i could dig out some ancient email conversation with Hellmuth... > It's unclear from the text whether one can rely on scan code set 3 > existing for every instance where scan code set 1 is not supported. I think it is. All modern MF-II keyboards appear to support scan set 3. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ Never trust an operating system you don't have sources for. ;-)
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