6530 Programmer's Guide

Overview
6530 Programmer’s Guide 1-9
The control characters specify a set of communications and terminal
control functions, such as moving the cursor on the screen. When the
6530 receives a recognized control character, it performs the specified
function. Unrecognized control characters are ignored. Control characters
are not stored in display memory, and are not shown on the screen.
Your application program can send control characters to the 6530 by
sending the code associated with that character. In conversational mode,
the user can generate ASCII control characters from the keyboard by
pressing the Ctrl key followed by an alphanumeric key or by pressing
special keys such as the backspace key.
Escape Sequences Control codes are extended by escape sequences to increase terminal
functionality. An escape sequence consists of a string of ASCII
characters, starting with the Esc (1BH) control character and followed by
one or more graphic characters that comprise the escape code and any
additional parameters. When the 6530 receives a recognized escape
sequence, it performs the function specified. Unrecognized escape
sequences cause the 6530 to issue a command error: the DEL symbol
appears at the cursor position.
Your application program can send escape sequences to the 6530 by
sending the ASCII code for the Esc character (1BH) followed by the
appropriate graphic character(s). In conversational mode, the user can
generate escape sequences from the keyboard by pressing the Esc key
followed by one or more alphanumeric keys.
Appendix A lists the control characters in the C0 and Cl sets. Not all of
these are recognized by the 6530. Appendix C summarizes all the
recognized control codes and escape sequences. The control codes and
escape sequences available depend on the mode of operation selected.
Chapters 2 and 3 describe the codes and sequences available in
conversational and block mode.
The 6530 also supports character sets and keyboards for use in countries
other than the U.S. The user or your application can set the language to be
used with a configuration parameter. The supported languages are:
ASCII (U.S. English)
Belgian
Cyrillic
Danish
English (UK)
French (AZERTY and QUERTY)
German