Download (precompiled for Java 1.5, or the source) a Supdup-enabled version of the Java Telnet application. The original code is fairly easy to add plugins to, but so far I had to hardcode the use of the supdup terminal emulator, so this version is only useful for Supdup.

?? 2009-04-05 :: handle MacOS X Escape key and Control-Space, and supply a [[http://victor.se/bjorn/its/Supdup.dmg|MacOS application]] ([[http://victor.se/bjorn/its/Supdup-app.tar.gz|.tar.gz]]). (The Alt key doesn't work yet.) !!
?? 2005-08-10 :: avoids idle (logged-in) disconnection by periodically sending a "keep-alive" to ITS. !!
?? 2005-08-06 :: supports the [[http://up.update.uu.se/sailch%20html|SAIL character set]]! Thanks MMcM! !!

To run, use

  java -jar supdup.jar [hostname]

Note that the window can be resized, but the change only gets through to ITS at connection time (due to the Supdup protocol). Note also that you can use Ctrl+X for non-alpha X, e.g. digits, at least in Linux - it doesn't seem to work in Windows. Note also that you can use it as an applet, if your Java sandbox allows.

Things to do on a rainy day:

• implement the graphics extension (RFC746) (and port Spacewar?)
• add a plugin for Chaosnet (over the CHUDP protocol, see here) to connect to Chaos-only hosts

Java is a trademark or registered trademark of Sun Microsystems, Inc. in the United States and other countries. The Java Supdup author (Björn Victor) is independent of Sun Microsystems, Inc.