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Mcgee's right. Text entry is a challenge given the long refresh. On the face of it, multitap has a problem since getting to the third letter might mean waiting three seconds. If you mess up, that's another four, and that's too painful. Two words really could take a full minute to type.
First of all, the screen has to be put into 1-bit mode (0.5s refresh). Second, it should use the same principle the menu chevron uses if you press joystick up/down. It seems something new can appear on the screen faster than something old can disappear. So, visually, the letter choices should rise up in a vertical column with each tap instead of changing in place. (When a letter is finished, the column will get erased.) It might be possible, even, to start painting the third choice before the second or first is even solid (asynch drawing). That should help solve the refresh problem. Plus... it'll look a bit like the matrix and maybe it might make it easier to learn to multitap.
Also, the multitap scheme should be identical to a phone, including the quirks. So the number 1 doesn't get used and some keys have 4 letters. Obviously it's not the best way to do it, but at this point it's best to not use a dvorak.
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