=> R1 = pointer to menu data structure
R2 = pointer to list of menu selections
R3 = pointer to buffer for answer
<= R0 corrupt
Buffer pointed to by R3, contains menu item texts, separated by '.'s
This SWI is incredibly useful if you want to decode menus by their contents. This is easier than playing with the selection number if you want an easy life. If you had a menu containing 'Selection', with a sub-option 'Delete' which was chosen you would get the string 'Selection.Delete' back. Note that the string is terminated with CR.
See PRM 3, page 161.
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