For a couple of days now i have bin looking at a GB on Geekhack for a TMK FC660C Alt Controller.
i’m not specifically posting this item as a MarketPlace GB but as a discussion asking for help.
Because i can't make head nor tail of it all.
Opening up the case and mate/unmate the controller seems clear enough.
I can follow along the different Keymap editors plain (simple layout) and Emu looks more like FC660C.
(doesn't seem to work on Safari but no problem on firefox).
But even opening up the TMK Keymap Editor looking at the first Layer 0 i start having questions.
Like what does LM2 stand for?
But more importent i have no clue how to start using it all.
i started at the main TMK project page.
And read both pages; Flash firmware and Keymap details
The last one "Keymap Framework - how to define your keymap" was intressting and i would have to read that again to fully digest it. But it seemed more like a in depth wiki than a howto to me

The Flash firmware page left me with even more questions.
like can i do this on my fedora machine? or mac 10.9.5 . if possible i would rather do it on my old Linux fedora 32bit laptop.
Can't make head nor tail of it all..do i need to dive in to dfu-programmer and how to install it on linux ?
OMG my head is spinning i'm hoping someone can help me..
And GH forum isn't that helpful, and i can't find my way there (main reason why i'm subscribed to DT).
i really hope i can make sense of it all.. $40 for a backup usb controller that offers programmability sounds awesome.
There are sum issues i read on mac in regards to media keys and Fn
(i read that under FAQ i think,

in short there are no real compatibility problems on OSX there seemed to be two ways to communicate with OSX and one works.
Really hope someone here has used this in a different keyboard perhaps on the HHKB? or someone more savvy understands this all and is also going to buy this controller..
here are sum links i saved..
main site with links.
http://www.tmk-kbd.com/tmk_keyboard/
Keymap framework - how to define your keymap
https://github.com/tmk/tmk_keyboard/blo ... /keymap.md
TMK Keyboard Firmware Collection (readme)
https://github.com/tmk/tmk_keyboard/blo ... /README.md
TMK Keymap Editor FC660C Original keymap.
http://www.tmk-kbd.com/tmk_keyboard/edi ... fc660c_emu
Thanks guys....