To keep the long story short, I've managed to spot one of the sweet-looking keyboards from the place I work at in a bucket full of random broken stuff. I asked what was supposed to happen there and the technician simply said "it's scrap metal". Hmm... "Any chance I might get a hold of it for myself?"
After a short talk with the master technician, he decided that I could have it. Success!
It was looking miserable when I got it home, but after a full evening cleaning up everything and plugging it into a PS/2 to USB converter... It was in absolutely perfect working order. The only weird thing at first was that something seemed to be broken underneath the space bar, but it turned out that the stabilizer was just placed the wrong way.
Here's the exemplar in question, after cleanup:
And the back label:
There is absolutely no information online that I can find about this keyboard, except for this PDF on the GMK website:
https://www.gmk-electronic-design.de/fileadmin/user_upload/Datenbl%C3%A4tter/Datenblatt_Multifunktionskeyboard.pdfNow for my question... I'm particularly interested in the possibility of being able to use the top rows to create some custom macros, I assume that's the main purpose of that bit:
I've tried multiple key combinations and lengths of time, but I didn't get any results. I also assume that little LED number can go up to nine for different layers... but I can't change it no matter what. By the way, all the buttons on the top layer currently correspond to "F1+Alt", "F2+Alt", etc. While the second row corresponds to "F1+Shift", "F2+Shift" and so on. The "Prog" and "Layer" buttons don't have any functions associated with them.
Any ideas on how to get that working? Or maybe some third-party software that could allow me to change what they currently do?