I note that the Keil CARM compiler is now considered a "Legacy" tool: http://www.keil.com/arm/selector.asp "Realview" is the latest & greatest: http://www.keil.com/pr/article/1089.htm Although there seem to be no links to any real information about The "RealView Compilation Tools from ARM" at http://www.keil.com/arm/rvmdkkit.asp