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+.. _plugins-gdbstub:
+
+GDB Stub Plugin
+===============
+
+The GDB stub plugin acts as a remote debugging server for the GNU debugger
+(GDB). This allows you to connect to MAME and debug supported systems using
+GDB. The plugin listens for connections on port 2159 on the IPv4 loopback
+address (127.0.0.1). Only Intel 80386 (i386) family processors are supported.
+
+See the :ref:`debugger option <mame-commandline-debugger>` for another GDB
+remote debugging implementation with support for more CPUs and configurable
+listening ports.