OK, after some more resarch, I have some idea of what's going on. It seems 
that the X server gets the scan codes from the kernel, then passes these scan 
codes to the X client. xlib has some nice functions to then convert these 
scan codes into keycodes, then into keysyms. (Correct me if I'm wrong here.)

So, I looked into xc/lib/X11/XKeysymDB, which seems to have the kind of 
information I want, but not the actual scan codes I'm looking for. Then I 
looked at xc/include/keysymdef.h, which seemed to be a better place. But 
after looking at these, they both seem to be keysym definitions, not scan 
code (or even key code) definitions.

Where are the scan codes defined, or mapped or whatever?

Thanks for any pointers?

Frank

On Wednesday 04 June 2003 09:52, Frank Murphy wrote:
> I have an iBook with a US keyboard layout, and I'm having a wierd problem I
> hope you can help with.
>
> The mac keyboards have a "keypad equals" key. X doesn't support that as
> separate from regular equals, but I'd like to use it to type equals. The
> problem is that both this KP-equals and the left-arrow key have the same
> keysyms. If I try to modify one, I modify both.
>
> Here's the relevent xev output:
>
> KeyPress event, serial 27, synthetic NO, window 0x2000001,
>     root 0x48, subw 0x0, time 35558015, (180,101), root:(183,519),
>     state 0x0, keycode 100 (keysym 0xff51, Left), same_screen YES,
>     XLookupString gives 0 characters:  ""
>
> KeyRelease event, serial 27, synthetic NO, window 0x2000001,
>     root 0x48, subw 0x0, time 35558135, (180,101), root:(183,519),
>     state 0x0, keycode 100 (keysym 0xff51, Left), same_screen YES,
>     XLookupString gives 0 characters:  ""
>
> KeyPress event, serial 27, synthetic NO, window 0x2000001,
>     root 0x48, subw 0x0, time 35560194, (180,101), root:(183,519),
>     state 0x0, keycode 100 (keysym 0xff51, Left), same_screen YES,
>     XLookupString gives 0 characters:  ""
>
> I am actually hitting different keys here, but it doesn't look like it.
>
> What is wierd is that these keys generate different keysyms and characters
> on the console. I type an '=' with both keys (on Debian sid).
>
> I had a suggestion to look in the XF86 keyboard code. Does anyone here have
> an idea of which files to start to look in? Will this be a C-code problem
> or a configuration issue somewhere? Or does anyone know how to see the
> scancodes that X thinks I have?
>
> Here's the version info from the top of the XFree86.0.log:
>
> XFree86 Version 4.3.0 (DRI mach64-0-0-6-branch)
> Release Date: 27 February 2003
> X Protocol Version 11, Revision 0, Release 6.6
> Build Operating System: Linux 2.4.20-ben8-xfs-lolat ppc [ELF]
>
> I'm using the Xserver packages that Michael Däzner provides. Do you need
> any other info?
>
> Thanks for any help,
>
> Frank
>
>
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