Heroway serial screen control FAQ (1)

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This section covers touch-widget issues: why basic touch cannot send a value (value sending works only inside pop-up menus/keyboards via the root address; menu key values 0000-00FE send, 00FF does not; use key-return or incremental-adjust widgets for direct value sending); touch areas cannot overlap (the underlying arbitration mechanism forbids it and the software refuses to compile, except slide-page touch); difference between basic touch and key return (basic touch only switches pages, key return carries an address); pop-up menu works only with basic touch; incremental adjust handles one address word; text input pads FFFF terminators that affect following addresses; GBK punctuation via 'bd'; GBK mixed Chinese/English via 0x0D0D carriage return; ASCII uppercase by reversing key values (0x4161); data-entry cursor via register 0x4F (DGUS) or system variable 0xD4 (DGUS II).