Support of Application Unique Character Sets
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
By detecting that a Unique Character Set is in effect, character codes can be sent to a Unique Translator for preprocessing into a stream of character codes that simulates the lower function addressability of other character sets to provide the required interface to Virtual Device Driver for the installed display. Additionally, by keeping two unique character sets to display symbol mappings in each virtual terminal, each application can uniquely specify two unique character sets, in addition to the predefined ones, thereby simplifying porting applications that make use of unique character sets. A Display Device Drive requires two pieces of information in order to select one of an array of 1024 symbols for screen display: an 8-bit character code and a 32-bit base.