3866F | 
 SysMenuCheck
 | 
(  →  ) 
Checks menu validity. If DA3NoCh? then
nothing. If Track? then ?DoTrackAct@. If
Rebuild? then SetThisRow.
 | 
3A1CA | 
 ?DispMenu
 | 
(  →  ) 
Redisplays the menu now if no key is waiting
in the buffer.  Even better is this: 
:: DA3OK?NOTIT ?DispMenu ;
 | 
3A1FC | 
 DispMenu.1
 | 
(  →  ) 
Displays menu now.
 | 
3A1E8 | 
 DispMenu
 | 
(  →  ) 
:: DispMenu.1 SetDAsValid ;
 |