71 lines
2.8 KiB
Groff
71 lines
2.8 KiB
Groff
.\"
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.\" Copyright (c) 1996 Jonathan Stone.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Jonathan Stone.
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $NetBSD: lk201.4,v 1.5 1999/04/06 20:24:49 pk Exp $
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.\"
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.Dd August 6, 1996
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.Dt LK201 4 pmax
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.Os
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.Sh NAME
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.Nm lk201
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.Nd
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DEC LK-201 keyboard input driver
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the
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.Tn Digital
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.Tn LK-201
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keyboard and its successors.
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This support is automatically configured into the kernel,
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to map keypress input events into ASCII codes.
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There is no way to disable this support.
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.Pp
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The kernel also includes support for an in-kernel ring-buffer
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structure for keypress events and pointer (mouse) events.
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The
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.Nm fb
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driver redirects mouse and keyboard input into this in-kernel
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structure, and updates the position of a framebuffer cursor sprite to
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track the mouse.
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This is for compatibility with the
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.Nm qv
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QVSS-style software interface used by X11 on DECstation and VAXstation
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framebuffers.
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This design offers significantly better performance on the
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VAXstation-100 and VAXstation-II, but makes it impossible to use
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alternative pointer or keyboard devices.
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.Sh BUGS
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The
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.Nm
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support should be re-written as a real driver or as a pseudo-device driver.
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The
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.Nm
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driver should use an in-kernel streams facility, if one existed.
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