GFX Library
ChessMate uses the GFX library of Aaron Ardiri for off-screen drawing. Off-screen drawing is needed for smooth animations, or in the case of ChessMate flicker free dragging of chess pieces.
Unfortunately I was unable to link the standard GFX library to the rest of ChessMate. Apparently the GFX library was made with a older version of the VTOS-SDK. I removed the conflicting files from the library. The modified version is included with source code of ChessMate.