Michael Brown
0bbd896783
The key with scancode 86 appears in the position between left shift and Z on a US keyboard, where it typically fails to exist entirely. Most US keyboard maps define this nonexistent key as generating "\|", with the notable exception of "loadkeys" which instead reports it as generating "<>". Both of these mapping choices duplicate keys that exist elsewhere in the map, which causes problems for our ASCII-based remapping mechanism. Work around these quirks by treating the key as generating "\|" with the high bit set, and making it subject to remapping. Where the BIOS generates "\|" as expected, this allows us to remap to the correct ASCII value. Signed-off-by: Michael Brown <mcb30@ipxe.org>
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*
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* Copyright (C) 2022 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <ipxe/keymap.h>
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/** @file
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*
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* Keyboard mappings
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*
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*/
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/**
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* Remap a key
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*
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* @v character Character read from console
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* @ret character Mapped character
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*/
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unsigned int key_remap ( unsigned int character ) {
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struct key_mapping *mapping;
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/* Remap via table */
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for_each_table_entry ( mapping, KEYMAP ) {
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if ( mapping->from == character ) {
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character = mapping->to;
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break;
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}
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}
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/* Clear pseudo key flag */
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character &= ~KEYMAP_PSEUDO;
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return character;
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}
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