The present invention provides a computer joystick which will convert movements of its control stick into digital signals. Features may be created over a range of scales, including those suitable for the generation of holographic images. The running current is provided from a controller coupled with the hard disk drive. The multi-core chip can fail the test if the number of defective cores can be greater than the number of spare cores. A monorail is rotatably coupled to the chassis allowing it to rotate between an in-use and a quick stowage position.