If you have a diagnostic card, you can install updates from it in normal mode. However, our current publicly described method of updating presumes that you are able to switch your reader into the recovery mode. The ebook_msc utility allows you to do just that. The utility itself doesn't do a whole lot, but it utilizes the functions from Sony's DLLs, which allow it to communicate with the reader. Those functions may be partially ported into Calibre, but the port may not be up-to-date with the current reader models. I would recommend that you use some Windows box to initiate the flashing of the reader. At least until you make a diagnostic card, which will allow you to execute updates from normal mode.
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