[console] Treat dead keys as producing their ASCII equivalents

Treat dead keys in target keymaps as producing the closest equivalent
ASCII character, since many of these characters are otherwise
unrepresented on the keyboard.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/hci/keymap/keymap_nl.c

@@ -15,10 +15,12 @@ static struct keymap_key nl_basic[] = {
 	{ 0x1c, 0x3c },	/* 0x1c => '<' */
 	{ 0x1d, 0x1c },	/* 0x1d => 0x1c */
 	{ 0x1e, 0x36 },	/* 0x1e => '6' */
+	{ 0x22, 0x60 },	/* '"' => '`' */
 	{ 0x26, 0x5f },	/* '&' => '_' */
 	{ 0x28, 0x29 },	/* '(' => ')' */
 	{ 0x29, 0x27 },	/* ')' => '\'' */
 	{ 0x2a, 0x28 },	/* '*' => '(' */
+	{ 0x2b, 0x7e },	/* '+' => '~' */
 	{ 0x2d, 0x2f },	/* '-' => '/' */
 	{ 0x2f, 0x2d },	/* '/' => '-' */
 	{ 0x3b, 0x2b },	/* ';' => '+' */
@@ -31,6 +33,7 @@ static struct keymap_key nl_basic[] = {
 	{ 0x5e, 0x26 },	/* '^' => '&' */
 	{ 0x5f, 0x3f },	/* '_' => '?' */
 	{ 0x60, 0x40 },	/* '`' => '@' */
+	{ 0x7b, 0x5e },	/* '{' => '^' */
 	{ 0x7c, 0x3e },	/* '|' => '>' */
 	{ 0x7d, 0x7c },	/* '}' => '|' */
 	{ 0xdc, 0x5d },	/* Pseudo-'\\' => ']' */
@@ -41,6 +44,7 @@ static struct keymap_key nl_basic[] = {
 /** "nl" AltGr remapping */
 static struct keymap_key nl_altgr[] = {
 	{ 0x2d, 0x5c },	/* '-' => '\\' */
+	{ 0x38, 0x7b },	/* '8' => '{' */
 	{ 0x39, 0x7d },	/* '9' => '}' */
 	{ 0, 0 }
 };