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| author | Michael Brown <mcb30@ipxe.org> | 2022-02-09 15:43:42 +0000 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2022-02-10 13:59:32 +0000 |
| commit | 0bbd8967830097b9141945ba960e90339c230ccb (patch) | |
| tree | eca6637c24625b3ca50663d8f5e833f6e4f009b5 /src/arch | |
| parent | 3f05a82fec6223a49df300a9cbf80c6245c3f99e (diff) | |
| download | ipxe-0bbd8967830097b9141945ba960e90339c230ccb.zip ipxe-0bbd8967830097b9141945ba960e90339c230ccb.tar.gz ipxe-0bbd8967830097b9141945ba960e90339c230ccb.tar.bz2 | |
[console] Handle remapping of scancode 86
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>
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/x86/interface/pcbios/bios_console.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/arch/x86/interface/pcbios/bios_console.c b/src/arch/x86/interface/pcbios/bios_console.c index 443513e..438a01d 100644 --- a/src/arch/x86/interface/pcbios/bios_console.c +++ b/src/arch/x86/interface/pcbios/bios_console.c @@ -68,6 +68,13 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); */ #define SCANCODE_RSHIFT 0x36 +/** Scancode for the "non-US \ and |" key + * + * This is the key that appears between Left Shift and Z on non-US + * keyboards. + */ +#define SCANCODE_NON_US 0x56 + /* Set default console usage if applicable */ #if ! ( defined ( CONSOLE_PCBIOS ) && CONSOLE_EXPLICIT ( CONSOLE_PCBIOS ) ) #undef CONSOLE_PCBIOS @@ -383,6 +390,8 @@ static int bios_getchar ( void ) { if ( character && ( character < 0x80 ) ) { if ( scancode < SCANCODE_RSHIFT ) { return key_remap ( character ); + } else if ( scancode == SCANCODE_NON_US ) { + return key_remap ( character | KEYMAP_PSEUDO ); } else { return character; } |