>I think Jason could still be right.
>Each normal character is 5x8 for 80 dots
>The 3x7 segments are 21 dots, only half of a characters dots.
>Thus you should on average see half of the segments 'lit' as charactor
>dots for the same code in address 0x00 -0x0E.
>Does a Space (0x20 and / or 0xA0) have all 3 characters off?
>0xFF might have all segments on if it works. (Font table says may be
>inadequate.)

This was the way I started thinking as well. You say the chip is similar to
a 44780, so I would start by setting char 16 to one of the downloadable char
ram spots, and then download characters into the ram with only one bit of
the dot matrix turned on, and see which segment lights. I suspect you will
eventually map the 21 segments to individual dots in a character.

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