When Core Shell receives the )0 escape code it immediately switches to line drawing mode. That is not the way the escape code is supposed to work. The code should set the line draw set as the “G1” character set, but that set should not be activated until the receipt of a Shift Out (Ctrl-N) character.
The Shift Out (Ctrl-N) should switch to the G1 set, and the Shift In (Ctrl-O) should switch back to G0. The ) and ( escape sequences are used to choose what G1 and G0 actually display.
