Cybook Gen 3 appears not to be able to recognize text files (TXT or HTML) in any form of Unicode - it seems to assume input file is always in one-byte character encoding (ASCII or extended ASCII). I tried to read UTF-8 txt files, and UTF-8 html files, and it always displayed junk. So the module for converting input file into set of characters and positions to display the in seems to work on plain ASCII.
However, the module for font display seems to work with Unicode, when Unicode characters are delivered directly for it to display (for example, if using HTML entities, or with Mobi books).
Since the firmware for both Gen3 and Opus is apparently the same firmware, I expect such will be the behaviour of the Opus.
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