Abstract: A weapons-mounted marksmanship training system comprises a system adapted to be a replacement device for the sighting system of a conventional weapon. The training system includes a high resolution display controlled by an embedded CPU and graphics processor, with video training images maintained in a mass storage unit. A motion tracking unit is also provided to detect motion of the weapon on which the training system is mounted. Personnel being trained in the use of the weapon are able to select a training scenario, which is then realistically portrayed in the image display, without the need for any special environment or external devices.

Abstract: A technique for glitchless switching among different frequency input clocks in a circuit includes monitoring each of the clocks and determining when the relative phases of the respective clocks are within a predetermined maximum of phase difference. Once the relative phases of the respective clocks are within an acceptable range, the system switches from one clock to another.

Abstract: A system and method for synchronization of video raster display outputs from multiple PC graphics subsystems to facilitate synchronized output onto multiple displays are disclosed. The system and method allow multiple graphics subsystems, in a single or multiple chassis, to be used to provide multiple synchronized view ports of a single 3D database or a wide desktop with reduced inter-monitor artifacts and interference.