This directory contains the BRLTTY driver for the Focus and PAC Mate braille displays from Freedom Scientific [http://www.freedomscientific.com]. It has been implemented, and is being maintained, by Dave Mielke . The most important single command is the one to access the help screen. On the PAC Mate display this is the key just to the right of the center marker (also referred to as HK5 below). On the Focus, this is chord H (Space+Dots125). Serial, USB, and Bluetooth are all supported. The following models are recognized: * Focus 1: 44, 70, 84 * Focus 2: 40, 80 * Focus Blue: 14, 40, 80 * PAC Mate: 20, 40 If an unrecognized model is connected then the driver makes an attempt to determine its size and to provide generic capabilities. The upper row of routing buttons on the PAC Mate are a set of hot keys. They provide quick access to various braille display functions and options (see the help screen for what they actually do). There are three markers at the back of the display's top surface, i.e. just behind the routing buttons, which help you locate and distinguish each hot key. The keys immediately below the left and right markers are the left and right GDF keys. Between them are eight keys ... four on each side of the center marker. The buttons between the left GDF key and the center marker are named (from left to right) HK1, HK2, HK3, and HK4; those between the center marker and the right GDF key are named (from left to right) HK5, HK6, HK7, and HK8. Any button to the left of the left GDF key acts as the left advance key, and any button to the right of the right GDF key acts as the right advance key. The following drawing depicts this layout visually: ++ ++ ++ || || || || || || ...+---++---++---++---++---++---++---++---++---++---++---++---++---++---+... Left Advance||GDF||HK1||HK2||HK3||HK4||HK5||HK6||HK7||HK8||GDF||RightAdvance ...+---++---++---++---++---++---++---++---++---++---++---++---++---++---+...