How do I get into System?
The System menu is accessed by holding <Avo> and pressing <Disk>. For Titan One and Simulator you will need to press the <System> button.
Some consoles are also fitted with a key switch or mode switch to select System mode.
The options in this menu are separated from the other options on the console because you would normally only change them occasionally, or because they can have serious effects on the way the console works and you wouldn’t want to change them accidentally.