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### 4.1 Sun Workstations Running X

Some earlier Sun keyboards do not have arrow keys separate from the keypad keys. It is difficult to emulate the full EDT keypad and still retain use of the arrow keys on such keyboards.

The Sun Type 5 and other more recent Sun keyboards, however, do have separate arrow keys. This makes them candidates for setting up a reasonable EDT keypad emulation.

Depending upon the configuration of the version of X installed on your system, you may find the default X keynames for the keypad keys don't permit Emacs to interpret some or all the keypad keys as something other than arrow keys, numeric keys, <Home>, <PageUp>, etc. Both Sun and HP have been particularly guilty of making bizarre keysym assignments to the keypad keys.

In most cases, the X Windows command, `xmodmap`, can be used to correct the problem. Here's a sample `.xmodmaprc` file which corrects this problem on one Sun workstation configuration using an older SunOS release configured with a Sun Type 5 keyboard:

         ! File:  .xmodmaprc
         !
         ! Set up Sun Type 5 keypad for use with the GNU Emacs EDT Emulation
         !
         keycode  53 = KP_Divide
         keycode  54 = KP_Multiply
         keycode  57 = KP_Decimal
         keycode  75 = KP_7
         keycode  76 = KP_8
         keycode  77 = KP_9
         keycode  78 = KP_Subtract
         keycode  97 = KP_Enter
         keycode  98 = KP_4
         keycode  99 = KP_5
         keycode 100 = KP_6
         keycode 101 = KP_0
         keycode 105 = F24
         keycode 119 = KP_1
         keycode 120 = KP_2
         keycode 121 = KP_3
         keycode 132 = KP_Add

If `edt-mapper.el` does not recognize your keypad keys as unique keys, use the command ‘`xmodmap -pke`’ to get a listing of the actual key codes and the keysyms mapped to them and then generate you own custom `.xmodmaprc` similar to the one above.

Next, feed `.xmodmaprc` to the `xmodmap` command and all the Sun Type 5 keypad keys will now be configurable for the emulation of an LK-201 keypad (less the <,> key). In this example, the line

         keycode 105 = F24

changes the X Windows name of the keypad <NumLock> key to be known internally as the <F24> key. Doing so permits it to be configured to behave as the <PF1> (<GOLD>) key.

The side effect of this change is that you will no longer have a <NumLock> key. If you are using other software under X which requires a <NumLock> key, then examine your keyboard and look for one you don't use and redefine it to be the <NumLock> key. Basically, you need to clear the <NumLock> key from being assigned as a modifier, assign it to the key of your choice, and then add it back as a modifier. (Unix for further help on how to do this.)