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To see all available qualifiers, see our documentation.
https://archive.org/details/X68000_488/page/n169/mode/2up
https://github.com/tmk/tmk_keyboard/tree/master/converter/x68k_usb
https://kyoutan.jpn.org/uts/pc/pic/x68key2/
http://www.x1center.org/resource/x1kbd.pdf
https://kyouichisato.blogspot.com/2014/07/sharp-x1-ps2.html
http://www.maroon.dti.ne.jp/youkan/mz2500/kbd.html