Braille will not be output by GPU, it will be output by CPU onto either USB or serial Braille bumper. Two different output channels may use two different codepages. If they were somewhat dependent as in multi-monitor situation, you would need to drive both via GPU. However they are independent output channels, which just happen to share contents. Commonly used Braille is a six dot encoding and most letters and numbers are encoded by this encoding. Eight dot encoding is used for music and mathematical notations.
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