> chose 'keyboad layout' jp(japanese), > then i cannot input _(under bar) .
Are you using a PS/2 or USB keyboard? The underscore should be obtained with shift-backslash (using the key left of the right shift key).
> chose 'keyboad layout' jp(japanese), > then i cannot input _(under bar) .
Are you using a PS/2 or USB keyboard? The underscore should be obtained with shift-backslash (using the key left of the right shift key).