Braille-8 Computer Terminal System

Summary The Braille-8 Computer Terminal System, introduced by Digital Equipment Corporation in 1973, is a specialized hardware and software solution designed to allow sightless users to interact with computer systems.

Key aspects of the system include:

• Hardware: It utilizes a PDP-8/F computer and a modified Teletype Corporation ASR-33 or KSR-33 teletypewriter. The teletypewriter is modified with a special embossing head and a rubber-coated platen, allowing it to print in Braille. These modifications are reversible, permitting the device to be restored to its standard configuration.
• Functionality: The system acts as either a standalone computer or a terminal for larger ASCII-based time-sharing systems. It uses software to convert standard ASCII signals into Braille symbols.
• Operation: Creating a single Braille character requires three print cycles, which the PDP-8/F manages to maintain appropriate speeds. While a standard Braille character set is provided, the software allows for easy customization to meet specific user preferences.