Thank you! With that information I have been able to recreate my cyrillic layout for the A1 (the key values differ somewhat from the official ones).
The offsets for the 3rd and 4th row have been streamlined and are now consecutive:
Spoiler:
Cyrillic Keyboard (GloHD/ClaraHD/AuraOne/H2O2):
- Enabled: yes
- PatchGroup: Keyboard alternatives
## Replaces keys on the Extended Latin keypad with Cyrillic alternatives.
##
## Note that after the device boots, the keypad might just show blank squares
## until after the first book has been opened.
## Also note that long-pressing keys on the base keypad will no longer show
## the appropriate list of Extended Latin keys.
#
# Replace layout sign
- FindBaseAddressString: "ÉÀÇ"
- ReplaceString: {Offset: 0, Find: "ÉÀÇ", Replace: "АБВ"}
# Change keyboard layout
- FindBaseAddressString: "ý\0\0ÿ\0\0š\0\0ž\0\0"
# Top row, left to right (10 keys):
- ReplaceString: {Offset: 0x00, Find: "ý\0", Replace: "ё"}
- ReplaceString: {Offset: 0x04, Find: "ÿ\0", Replace: "э"}
- ReplaceString: {Offset: 0x08, Find: "š\0", Replace: "ä"}
- ReplaceString: {Offset: 0x0C, Find: "ž\0", Replace: "ö"}
- ReplaceString: {Offset: 0x10, Find: "æ\0", Replace: "ü"}
- ReplaceString: {Offset: 0x14, Find: "œ\0", Replace: "µ"}
- ReplaceString: {Offset: 0x18, Find: "þ\0", Replace: "ю"}
#- ReplaceString: {Offset: -56, Find: "ß\0", Replace: ","}
- ReplaceString: {Offset: 0x1C, Find: "ij\0", Replace: "х"}
- ReplaceString: {Offset: 0x20, Find: "ŀ\0", Replace: "ъ"}
# Second row, left to right (10 keys):
- ReplaceString: {Offset: 0x28, Find: "à\0", Replace: "й"}
- ReplaceString: {Offset: 0x2C, Find: "á\0", Replace: "ц"}
- ReplaceString: {Offset: 0x30, Find: "â\0", Replace: "у"}
- ReplaceString: {Offset: 0x34, Find: "ä\0", Replace: "к"}
- ReplaceString: {Offset: 0x38, Find: "ã\0", Replace: "е"}
- ReplaceString: {Offset: 0x3C, Find: "å\0", Replace: "н"}
- ReplaceString: {Offset: 0x40, Find: "è\0", Replace: "г"}
- ReplaceString: {Offset: 0x44, Find: "é\0", Replace: "ш"}
- ReplaceString: {Offset: 0x48, Find: "ê\0", Replace: "щ"}
- ReplaceString: {Offset: 0x4C, Find: "ë\0", Replace: "з"}
# Third row, left to right (10 keys):
- ReplaceString: {Offset: 0x50, Find: "ò\0", Replace: "ф"}
- ReplaceString: {Offset: 0x54, Find: "ó\0", Replace: "ы"}
- ReplaceString: {Offset: 0x58, Find: "ô\0", Replace: "в"}
- ReplaceString: {Offset: 0x5C, Find: "ö\0", Replace: "а"}
- ReplaceString: {Offset: 0x60, Find: "õ\0", Replace: "п"}
- ReplaceString: {Offset: 0x64, Find: "ø\0", Replace: "р"}
- ReplaceString: {Offset: 0x68, Find: "ì\0", Replace: "о"}
- ReplaceString: {Offset: 0x6C, Find: "í\0", Replace: "л"}
- ReplaceString: {Offset: 0x70, Find: "î\0", Replace: "д"}
- ReplaceString: {Offset: 0x74, Find: "ï\0", Replace: "ж"}
# Fourth row, left to right (8 keys):
- ReplaceString: {Offset: 0x78, Find: "ù\0", Replace: "я"}
- ReplaceString: {Offset: 0x7C, Find: "ú\0", Replace: "ч"}
- ReplaceString: {Offset: 0x80, Find: "û\0", Replace: "с"}
- ReplaceString: {Offset: 0x84, Find: "ü\0", Replace: "м"}
- ReplaceString: {Offset: 0x88, Find: "ñ\0", Replace: "и"}
- ReplaceString: {Offset: 0x8C, Find: "ç\0", Replace: "т"}
- ReplaceString: {Offset: 0x90, Find: "đ\0", Replace: "ь"}
- ReplaceString: {Offset: 0x94, Find: "ł\0", Replace: "б"}