attached the fixed model
error in NOR digital model
take a look at some good keyboard layout examples for all models at: https://turbo80.com/en/
Spectrum + keyboard
PS. I saw now that on Windows is already working ALT GR. Wont work for me on Linux, with MATE desktop manager and X. Strangely on Windows LEFT ALT won't work, while work on Linux.
Virtual Keyboard
ALT GR as SYMBOL SHIFT
use version.h instead of help_data.h in resources/cygwin/xneditPkg.sh