<!DOCTYPE doctype PUBLIC "-//w3c//dtd html 4.0 transitional//en"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <title>x3270 Introduction</title> <link HREF="http://www.w3.org/StyleSheets/Core/Steely" TYPE="text/css" REL="stylesheet"> </head> <body> <H1>x3270 Introduction</H1> x3270 is an IBM 3270 terminal emulator for X windows. It can be used to communicate with any IBM host that supports 3270-style connections over TELNET. It can also communicate with hosts that use line-by-line ASCII mode to do initial login negotiation before switching to full-screen 3270 mode. <P> It can use its own special fonts to fully emulate the special symbols displayed on a 3278 or 3279, or any constant-width X font. <P> x3270 is a full-featured X client. It participates in common X protocols, such as cut-and-paste and the WM_DELETE_WINDOW and WM_SAVE_YOURSELF messages. It is highly configurable and supports a wide range of keyboards. A pop-up keypad is available for selecting common 3270 function keys. <P> x3270 emulates one of four models of an IBM 3278 or 3279 terminal. The difference between the various models is the screen size. The emulation is not quite complete; x3270 understands extended field orders but does not implement some of the extended attributes (outlining, extended validation, etc.). x3270 supports color displays in one of two ways: in 3278 mode by displaying text with different attributes in different colors, or in 3279 mode by implementing the full color 3270 protocols. It does not support 3179G bit-mapped graphics (GDDM). <P> x3270 supports the APL character set and several international character sets. Many APL and international symbols are entered from the keyboard using the "Compose" key and combinations of other keys. </body> </html>