Alpha space has no character

[TravisE]

This is the behavior I get:
Shift+Space: _
Upper-alpha (locked or not)+Space: (space)
Lower-alpha (locked or not)+Space: _

This was one of the first big annoyances I came across on the Prime. The issue is that the underscore is produced in lowercase alpha mode, when the space is arguably more convenient. This seems to be a consequence of the fact that (as far as I can tell) Shift+Alpha is always mapped to the lowercase function of the key (or the opposite case from the active one in alpha-lock) and there is no concept of independent shift functions in alpha mode. This causes the shift functions of keys without alpha characters, like the space key, to get a bit confusing.

I've been able to work around it with the user keys feature. The drawback is that to type an underscore one has to leave alpha-lock mode (slightly inconvenient, but being able to type spaces with lowercase text makes up for it, IMO). When I originally tried this on an earlier firmware revision, there was a nasty bug that caused corruption to the entry line, but this has since been fixed, and I've had no problems with it in version 10637.

Code:

KEY KSA_Space()
BEGIN
RETURN " ";
END;

IIRC, the above code should be entered in a program called USERKEYS and Shift+Help/User pressed twice to turn on user keys lock mode. As long as user keys mode is active, space should type spaces in upper- and lowercase alpha mode.

Hopefully I didn't make an error or omission; it's been a while since I've used my Prime.