Morse Codes for Computer Access
Morse code is perfect method for a quadriplegic, someone with little or no ablility to move. A person just needs to be able to activate a switch.
These are the morse codes I use to access the computer using a sip and puff pneumatic (air) switch connected to the AdapTek Interface Adap2U Adaptive Input Interface System. I've been using the Adap2U since 1994, unfortunately, it is no longer available. With the Adap2U I am able to enter every keyboard key, move the mouse and click the mouse buttons. Since the Adap2U is a hardware interface it can be used with any operating system. I have used it with every version of Windows (currently using Windows 10 Home 64-bit) and several versions of Linux.
I just started using a new morse code input device called Tandem Master aka Morse-2-USB controller. Using 2 switches (two head switches or sip and puff, for example) the user can input Morse codes for all keyboard keys, mouse the mouse (left, right, up, down) and click the mouse buttons. It is automatically recognized by any modern computer with a USB port. No additional software is needed to operate it.
In the Paralysis Resource Center video Hands-Free Computing, you can see how I use input Morse-type codes by using sip and puff. I was also featured on the Korean TV program "Science 21" (view segment)
Note: Some of the codes shown here are not standard International Morse code. I have changed some codes to better suit my usage. Example: standard M is "--" which I use for backspace instead.
I have codes defined in two "groups" and use a code to switch between them. This enables me to reuse the same codes for different functions in different groups. A third code group contains codes that are always active, such as commands to switch between the other code groups.
Modifier keys (Shift, Control & Alt) release after the next code for a non-modifier key is sent. If a modifier key is needed to remain active for multiple keys then the hold/release code can be used to keep it active until the hold/release code is sent again.
To move the mouse pointer, send the code once for the direction (up/down/right/left) then the repeat code (a single sip). The mouse continues to move in that direction until either a single sip or puff will stop it. The standard mouse move is set to move 4 mickeys. When I need to be more precise I send the "mouse zoom" code which changes the mouse moves to 1 mickey.
A " · " is a sip and a " - " is a puff.
Morse Code devices & software
ezMorse for Windows 95/98
Morse code is one of the most efficient alternative computer access methods. EzMorse is based on a modified military morse code system where dots and dashes are combined to form codes representing all the characters on the keyboard. EzMorse is most effectively used with a dual switch where one switch enters a dot and the other, a dash. No previous knowledge of morse code is necessary to start using ezMorse: the user learns while he or she goes along. It takes the average user about four hours to memorize the codes for the alphabet. Typing speeds of up to 35 words per minute are not uncommon for morse code users.
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