Colibri VF61 Computer on Module Real-Time demo controls an XY Pen Plotter using a Colibri VF61. In the demo, the VF61 Computer module ( https://www.toradex.com/computer-on-modules/colibri-arm-family/freescale-vybrid-vf6xx ), with its two cores of ARM® Cortex™-A9, and ARM® Cortex™-M4, is utilised to run an XY pen-plotter. The plotter is controlled by a custom eCos® RTOS based firmware on the Cortex™-M4 core. The user interface is created using Qt, running on Linux, on the Cortex-A5™ core. The documentation along with the links to the source code is available on the Toradex developer website : http://developer.toradex.com/how-to/colibri-vf61-real-time-demo-(xy-pen-plotter)