The JBits SDK contains a set of software tools and API's which let you create Xilinx Virtex bitstreams from Java code. Included is a graphical debugger called BoardScope, which allows you to view chip internals at runtime. BoardScope can also be used in simulator mode if hardware is unavailable. The JBits SDK features: JBits API for dynamic modification of Virtex bitstreams. Support on JavaSoft's Java 2 JVM (NT and Solaris) BoardScope interactive debug tool for Xilinx Virtex devices. XHWIF standard hardware interface. XVPI standard board interface for enabling the full power of JBits. JRoute, a signal router. RTPCores (Run Time Parameterizable Cores). Tutorial. Virtex Architecture Guide. Sample JBits programs. Example JBits cores. User guides. Javadocs. DTTScript, a portable, interactive, core based tool for debugging run-time reconfigurable designs. DeviceSimulator, a set of class files which allow the user to test bitstreams at the CLB level without hardware. If there are questions or problems, please send an email to JBits@xilinx.com