Add preliminary PS/2 keyboard support
diff --git a/src/scan_codes.tsv b/src/scan_codes.tsv
new file mode 100644
index 0000000..d036329
--- /dev/null
+++ b/src/scan_codes.tsv
@@ -0,0 +1,102 @@
+IBM Key No. Set 1 Make/Break Set 2 Make/Break Set 3 Make/Break Base Case Upper Case Is ASCII char Symbol Uppercase Symbol
+1 29/A9 0E/F0 0E 0E/F0 0E ` ~ yes '`' '~'
+2 02/82 16/F0 16 16/F0 16 1 ! yes '1' '!'
+3 03/83 1E/F0 1E 1E/F0 1E 2 @ yes '2' '@'
+4 04/84 26/F0 26 26/F0 26 3 # yes '3' '#'
+5 05/85 25/F0 25 25/F0 25 4 $ yes '4' '$'
+6 06/86 2E/F0 2E 2E/F0 2E 5 % yes '5' '%'
+7 07/87 36/F0 36 36/F0 36 6 ^ yes '6' '^'
+8 08/88 3D/F0 3D 3D/F0 3D 7 & yes '7' '&'
+9 09/89 3E/F0 3E 3E/F0 3E 8 * yes '8' '*'
+10 0A/8A 46/F0 46 46/F0 46 9 ( yes '9' '('
+11 0B/8B 45/F0 45 45/F0 45 0 ) yes '0' ')'
+12 0C/8C 4E/F0 4E 4E/F0 4E - _ yes '-' '_'
+13 0D/8D 55/F0 55 55/F0 55 = + yes '=' '+'
+15 0E/8E 66/F0 66 66/F0 66 Backspace no KBD_BACKSPACE NULL
+16 0F/8F 0D/F0 0D 0D/F0 0D Tab no KBD_TAB NULL
+17 10/90 15/F0 15 15/F0 15 q Q yes 'q' 'Q'
+18 11/91 1D/F0 1D 1D/F0 1D w W yes 'w' 'W'
+19 12/92 24/F0 24 24/F0 24 e E yes 'e' 'E'
+20 13/93 2D/F0 2D 2D/F0 2D r R yes 'r' 'R'
+21 14/94 2C/F0 2C 2C/F0 2C t T yes 't' 'T'
+22 15/95 35/F0 35 35/F0 35 y Y yes 'y' 'Y'
+23 16/96 3C/F0 3C 3C/F0 3C u U yes 'u' 'U'
+24 17/97 43/F0 43 43/F0 43 i I yes 'i' 'I'
+25 18/98 44/F0 44 44/F0 44 o O yes 'o' 'O'
+26 19/99 4D/F0 4D 4D/F0 4D p P yes 'p' 'P'
+27 1A/9A 54/F0 54 54/F0 54 [ { yes '[' '{'
+28 1B/9B 5B/F0 5B 5B/F0 5B ] } yes ']' '}'
+30 3A/BA 58/F0 58 58/F0 58 Caps Lock no KBD_CAPS_LOCK NULL
+31 1E/9E 1C/F0 1C 1C/F0 1C a A yes 'a' 'A'
+32 1F/9F 1B/F0 1B 1B/F0 1B s S yes 's' 'S'
+33 20/A0 23/F0 23 23/F0 23 d D yes 'd' 'D'
+34 21/A1 2B/F0 2B 2B/F0 2B f F yes 'f' 'F'
+35 22/A2 34/F0 34 34/F0 34 g G yes 'g' 'G'
+36 23/A3 33/F0 33 33/F0 33 h H yes 'h' 'H'
+37 24/A4 3B/F0 3B 3B/F0 3B j J yes 'j' 'J'
+38 25/A5 42/F0 42 42/F0 42 k K yes 'k' 'K'
+39 26/A6 4B/F0 4B 4B/F0 4B l L yes 'l' 'L'
+40 27/A7 4C/F0 4C 4C/F0 4C ; : yes ';' ':'
+41 28/A8 52/F0 52 52/F0 52 ' " yes '\'' '"'
+43 1C/9C 5A/F0 5A 5A/F0 5A Enter Enter no KBD_ENTER NULL
+44 2A/AA 12/F0 12 12/F0 12 Left Shift no KBD_LEFT_SHIFT NULL
+46 2C/AC 1A/F0 1A 1A/F0 1A z Z yes 'z' 'Z'
+47 2D/AD 22/F0 22 22/F0 22 x X yes 'x' 'X'
+48 2E/AE 21/F0 21 21/F0 21 c C yes 'c' 'C'
+49 2F/AF 2A/F0 2A 2A/F0 2A v V yes 'v' 'V'
+50 30/B0 32/F0 32 32/F0 32 b B yes 'b' 'B'
+51 31/B1 31/F0 31 31/F0 31 n N yes 'n' 'N'
+52 32/B2 3A/F0 3A 3A/F0 3A m M yes 'm' 'M'
+53 33/B3 41/F0 41 41/F0 41 , < yes ',' '<'
+54 34/B4 49/F0 49 49/F0 49 . > yes '.' '>'
+55 35/B5 4A/F0 4A 4A/F0 4A / ? yes '/' '?'
+57 36/B6 59/F0 59 59/F0 59 Right Shift no KBD_RIGHT_SHIFT NULL
+58 1D/9D 14/F0 14 11/F0 11 Left Ctrl no KBD_LEFT_CTRL NULL
+60 38/B8 11/F0 11 19/F0 19 Left Alt no KBD_LEFT_ALT NULL
+61 39/B9 29/F0 29 29/F0 29 Spacebar no KBD_SPACEBAR NULL
+62 E0 38/E0 B8 E0 11/E0 F0 11 39/F0 39 Right Alt no KBD_RIGHT_ALT NULL
+64 E0 1D/E0 9D E0 14/E0 F0 14 58/F0 58 Right Ctrl no KBD_RIGHT_CTRL NULL
+75 E0 52/E0 D2 (base) E0 70/E0 F0 70 (base) 67/F0 67 Insert no KBD_INSERT NULL
+76 E0 4B/E0 CB (base) E0 71/E0 F0 71 (base) 64/F0 64 Delete no KBD_DELETE NULL
+79 E0 4B/E0 CB (base) E0 6B/E0 F0 6B (base) 61/F0 61 Left Arrow no KBD_LEFT_ARROW NULL
+80 E0 47/E0 C7 (base) E0 6C/E0 F0 6C (base) 6E/F0 6E Home no KBD_HOME NULL
+81 E0 4F/E0 CF (base) E0 69/E0 F0 69 (base) 65/F0 65 End no KBD_END NULL
+83 E0 48/E0 C8 (base) E0 75/E0 F0 75 (base) 63/F0 63 Up Arrow no KBD_UP_ARROW NULL
+84 E0 50/E0 D0 (base) E0 72/E0 F0 72 (base) 60/F0 60 Down Arrow no KBD_DOWN_ARROW NULL
+85 E0 49/E0 C9 (base) E0 7D/E0 F0 7D (base) 6F/F0 6F Page Up no KBD_PAGE_UP NULL
+86 E0 51/E0 D1 (base) E0 7A/E0 F0 7A (base) 6D/F0 6D Page Down no KBD_PAGE_DOWN NULL
+89 E0 4D/E0 CD (base) E0 74/E0 F0 74 (base) 6A/F0 6A Right Arrow no KBD_RIGHT_ARROW NULL
+90 45/C5 77/F0 77 76/F0 76 Num Lock no KBD_NUM_LOCK NULL
+91 47/C7 6C/F0 6C 6C/F0 6C Keypad 7 no KBD_KEYPAD_7 NULL
+92 4B/CB 6B/F0 6B 6B/F0 6B Keypad 4 no KBD_KEYPAD_4 NULL
+93 4F/CF 69/F0 69 69/F0 69 Keypad 1 no KBD_KEYPAD_1 NULL
+95 E0 35/E0 B5 (base) E0 4A/E0 F0 4A (base) 77/F0 77 Keypad / no KBD_KEYPAD_/ NULL
+96 48/C8 75/F0 75 75/F0 75 Keypad 8 no KBD_KEYPAD_8 NULL
+97 4C/CC 73/F0 73 73/F0 73 Keypad 5 no KBD_KEYPAD_5 NULL
+98 50/D0 72/F0 72 72/F0 72 Keypad 2 no KBD_KEYPAD_2 NULL
+99 52/D2 70/F0 70 70/F0 70 Keypad 0 no KBD_KEYPAD_0 NULL
+100 37/B7 7C/F0 7C 7E/F0 7E Keypad * no KBD_KEYPAD_* NULL
+101 49/C9 7D/F0 7D 7D/F0 7D Keypad 9 no KBD_KEYPAD_9 NULL
+102 4D/CD 74/F0 74 74/F0 74 Keypad 6 no KBD_KEYPAD_6 NULL
+103 51/D1 7A/F0 7A 7A/F0 7A Keypad 3 no KBD_KEYPAD_3 NULL
+104 53/D3 71/F0 71 71/F0 71 Keypad . no KBD_KEYPAD_. NULL
+105 4A/CA 7B/F0 7B 84/F0 84 Keypad - no KBD_KEYPAD_- NULL
+106 4E/CE 79/F0 79 7C/F0 7C Keypad + no KBD_KEYPAD_+ NULL
+108 E0 1C/E0 9C E0 5A/E0 F0 5A 79/F0 79 Keypad Enter no KBD_KEYPAD_ENTER NULL
+110 01/81 76/F0 76 08/F0 08 Esc no KBD_ESC NULL
+112 3B/BB 05/F0 05 07/F0 07 F1 no KBD_F1 NULL
+113 3C/BC 06/F0 06 0F/F0 0F F2 no KBD_F2 NULL
+114 3D/BD 04/F0 04 17/F0 17 F3 no KBD_F3 NULL
+115 3E/BE 0C/F0 0C 1F/F0 1F F4 no KBD_F4 NULL
+116 3F/BF 03/F0 03 27/F0 27 F5 no KBD_F5 NULL
+117 40/C0 0B/F0 0B 2F/F0 2F F6 no KBD_F6 NULL
+118 41/C1 83/F0 83 37/F0 37 F7 no KBD_F7 NULL
+119 42/C2 0A/F0 0A 3F/F0 3F F8 no KBD_F8 NULL
+120 43/C3 01/F0 01 47/F0 47 F9 no KBD_F9 NULL
+121 44/C4 09/F0 09 4F/F0 4F F10 no KBD_F10 NULL
+122 57/D7 78/F0 78 56/F0 56 F11 no KBD_F11 NULL
+123 58/D8 07/F0 07 5E/F0 5E F12 no KBD_F12 NULL
+124 E0 2A E0 37/E0 B7 E0 AA E0 12 E0 7C/E0 F0 7C E0 F0 12 57/F0 57 Print Screen no KBD_PRINT_SCREEN NULL
+125 46/C6 7E/F0 7E 5F/F0 5F Scroll Lock no KBD_SCROLL_LOCK NULL
+126 E1 1D 45/E1 9D C5 E1 14 77 E1/F0 14 F0 77 62/F0 62 Pause Break no KBD_PAUSE_BREAK NULL
+29 2B/AB 5D/F0 5D 5C/F0 5C \ | yes '\\' '|'
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