|0||Header code [0x00590040]|
This writes to the MCU system-state buffer and updates the LegacyJumpProhibited bit.
This is set by LgyBg during title launch to deny the title of the rights to launch other titles via TWL Launcher (TLNC) block.
This is read by NS when handling the TLNC block. If this flag is set, NS ignores and memclears the TLNC block.