These are the keycodes used by the ST keyboard and the Mac Plus keyboard.
You can use these to edit the keyboard file (.KEY) as needed.


ST Keyboard Keycodes:

(Note: US keyboard doesn't have key 60.)

+----+----+----+----+----+----+----+----+----+----+----+----+----+----+------+
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 0A | 0B | 0C | 0D | 29 |  0E  |
+----+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+----+
|  0F  | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B |    | 53 |
+------++---++---++---++---++---++---++---++---++---++---++---++---+    +----+
|   1D  | 1E | 1F | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |   1C   | 2B |
+----+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+----+---+----+
| 2A | 60 | 2C | 2D | 2E | 2F | 30 | 31 | 32 | 33 | 34 | 35 |   36  |
+----++---+--+-+----+----+----+----+----+----+----+----+--+-+----+--+
      |  38  |                     39                     |  3A  |
      +------+--------------------------------------------+------+

               +------+-------+    +----+----+----+----+
               |  62  |   61  |    | 63 | 64 | 65 | 66 |
               +----+-+--+----+    +----+----+----+----+
               | 52 | 48 | 47 |    | 67 | 68 | 69 | 4A |
               +----+----+----+    +----+----+----+----+
               | 4B | 50 | 4D |    | 6A | 6B | 6C | 4E |
               +----+----+----+    +----+----+----+----+
                                   | 6D | 6E | 6F |    |
                                   +----+----+----+ 72 |
                                   |    70   | 71 |    |
                                   +---------+----+----+


Macintosh Plus Keyboard Keycodes:
   Control key (not present on keyboard) = 77

+----+----+----+----+----+----+----+----+----+----+----+----+----+-------+
| 65 | 25 | 27 | 29 | 2B | 2F | 2D | 35 | 39 | 33 | 3B | 37 | 31 |   67  |
+----+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+-----+
|  61  | 19 | 1B | 1D | 1F | 23 | 21 | 41 | 45 | 3F | 47 | 43 | 3D |     |
+------++---++---++---++---++---++---++---++---++---++---++---++---+     |
|   73  | 01 | 03 | 05 | 07 | 0B | 09 | 4D | 51 | 4B | 53 | 4F |    49   |
+-------+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+-+--+----+----+
|    71   | 0D | 0F | 11 | 13 | 17 | 5B | 5D | 57 | 5F | 59 |   71  | 1B |
+-------+-+----+-+--+----+----+----+----+----+----+--+----+----+----+----+
|   75  |   6F   |                 63                | 55 | 0D | 05 | 11 |
+-------+--------+-----------------------------------+----+----+----+----+


                         +----+----+----+----+
                         | 0F | 11 | 1B | 05 |
                         +----+----+----+----+
                         | 33 | 37 | 39 | 1D |
                         +----+----+----+----+
                         | 2D | 2F | 31 | 0D |
                         +----+----+----+----+
                         | 27 | 29 | 2B |    |
                         +----+----+----+ 19 |
                         |    25   | 03 |    |
                         +---------+----+----+