pub fn read(
machine: &Machine,
defs: &Menus,
) -> Result<Option<Vec<Option<ShownKey>>>, Error>Expand description
The six menu keys the screen shows now, read from RAM while the ROM
waits for a key (48SX, 48GX, 49G); None where they are not known
(another screen has the keyboard, a menu built in RAM, CST). defs
are the ROM’s menus (crate::menus::read).