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diff --git a/DOCS/vt102-ug/chapter4.html b/DOCS/vt102-ug/chapter4.html new file mode 100644 index 0000000..e11138d --- /dev/null +++ b/DOCS/vt102-ug/chapter4.html @@ -0,0 +1,86 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<HTML> +<HEAD> +<TITLE>VT100.net: Digital VT102 User Guide</TITLE> +<LINK HREF="vt102-ug.css" TYPE="text/css" REL="stylesheet"> +</HEAD> +<BODY> +<DIV CLASS="navbar"><A HREF="http://vt100.net/"><IMG CLASS="button" SRC="vt100.net-logo.png" ALT="VT100.net" HEIGHT="16" WIDTH="102"></A> VT102 User Guide<TABLE WIDTH="100%"> +<COL SPAN="3" WIDTH="33%"> +<TBODY> +<TR> +<TD ALIGN="LEFT"><A HREF="chapter3.html">Chapter 3</A></TD> +<TD ALIGN="CENTER"><A HREF="contents.html">Contents</A></TD> +<TD ALIGN="RIGHT"><A HREF="chapter5.html">Chapter 5</A></TD> +</TR> +</TBODY> +</TABLE> +<HR></DIV> +<H1 ID="S4"><SPAN CLASS="chapnum">4</SPAN> Transmitted Characters</H1> +<H2 ID="S4.1">General</H2> +<P>This chapter describes the characters generated by the VT102 keyboard. +The keys are divided into three groups: standard keys, function keys, and +numeric keypad keys.</P> +<H2 ID="S4.2">Standard Keys</H2> +<P>The keyboard generates American Standard Code for Information Interchange +(ASCII) characters. The standard keys (<A HREF="figure4-1.html">Figure 4-1</A>) generate +lowercase ASCII characters when neither <SPAN CLASS="keyname">SHIFT</SPAN> or <SPAN CLASS="keyname">CAPS LOCK</SPAN> are +down. These keys generate uppercase ASCII characters when either <SPAN CLASS="keyname">SHIFT</SPAN> or <SPAN CLASS="keyname">CAPS LOCK</SPAN> key are down. <SPAN CLASS="keyname">CAPS LOCK</SPAN> does not affect the +nonalphabetic keys.</P> +<H2 ID="S4.3">Function Keys</H2> +<P>The function keys (<A HREF="figure4-2.html">Figure 4-2</A>) generate characters defined by the computer +software or communication system. The following paragraphs describe +the function keys.</P> +<H3 ID="S4.3.1">BREAK/HERE IS</H3> +<P>This key generates a break defined by the computer system when the +break enable feature is on. This feature does not affect other key sequences +using <SPAN CLASS="keyname">BREAK</SPAN>.</P> +<P>Hold down <SPAN CLASS="keyname">SHIFT</SPAN> and press <SPAN CLASS="keyname">BREAK</SPAN> to generate a long break disconnect. +A long break disconnect usually disconnects the terminal from the communication +line. See <A HREF="chapter6.html#S6.2.3">Break</A> in <A HREF="chapter6.html">Chapter 6</A> for more information about breaks +and long break disconnects.</P> +<P>Hold down <SPAN CLASS="keyname">CTRL</SPAN> and press <SPAN CLASS="keyname">HERE IS</SPAN> to transmit the answerback message. +See <A HREF="chapter3.html">Chapter 3</A> for more information about the answerback feature.</P> +<H3 ID="S4.3.2">Cursor Control Keys</H3> +<P>In ANSI mode, with alternate (application) keypad mode selected, the cursor +keys generate either application or cursor control sequences. Cursor +key mode selects the type of sequence.</P> +<P>With numeric keypad mode selected, the cursor keys generate ANSI cursor +commands. The computer selects both cursor key mode and keypad +mode. See <A HREF="chapter5.html#S5.5.2.14">Cursor Key Character Selection</A> in <A HREF="chapter5.html">Chapter 5</A> for more information.</P> +<P>In VT52 mode, the cursor keys only generate VT52 cursor control sequences. +<A HREF="table4-1.html">Table 4-1</A> lists the ANSI and VT52 compatible cursor key characters.</P> +<H3 ID="S4.3.3">Control Character Keys</H3> +<P><A HREF="figure4-3.html">Figure 4-3</A> shows the keys that generate control characters. You can generate +control characters in two ways.</P> +<UL> +<LI>Hold down <SPAN CLASS="keyname">CTRL</SPAN> and press any unshaded key in <A HREF="figure4-3.html">Figure 4-3</A>.</LI> +<LI>Press any shaded key in <A HREF="figure4-3.html">Figure 4-3</A> without using <SPAN CLASS="keyname">CTRL</SPAN>. These dedicated +keys generate control characters without the use of <SPAN CLASS="keyname">CTRL</SPAN>.</LI> +</UL> +<P><A HREF="table4-2.html">Table 4-2</A> lists the control characters generated by the keyboard. Different +computer systems may use each control character differently.</P> +<P CLASS="note">NOTE: The VT102 generates some control characters differently than +previous DIGITAL terminals. <A HREF="table4-3.html">Table 4-3</A> lists the changes.</P> +<H2 ID="S4.4">Numeric Keypad Keys</H2> +<P>These keys generate characters selected by the ANSI/VT52 feature and +alternate (application) keypad mode. The computer selects application +keypad mode. See <A HREF="chapter5.html#S5.5.2.15">Keypad Character Selection</A> in <A HREF="chapter5.html">Chapter 5</A> for more information.</P> +<P>In numeric keypad mode, the numeric keypad generates the numeric, +comma, period, and minus sign characters used by the main keyboard. In +application keypad mode, the numeric keypad generates control functions. +<A HREF="table4-4.html">Table 4-4</A> lists the characters generated by the numeric keypad.</P> +<DIV CLASS="navbar"><HR> +<TABLE WIDTH="100%"> +<COL SPAN="3" WIDTH="33%"> +<TBODY> +<TR> +<TD ALIGN="LEFT"><A HREF="chapter3.html">Chapter 3</A></TD> +<TD ALIGN="CENTER"><A HREF="contents.html">Contents</A></TD> +<TD ALIGN="RIGHT"><A HREF="chapter5.html">Chapter 5</A></TD> +</TR> +</TBODY> +</TABLE> +<DIV CLASS="navbot">http://vt100.net/docs/vt102-ug/chapter4.html</DIV></DIV> +</BODY> +</HTML> |