I am simulating a generic Cortex M3 model using uVision 4.10 but simulation time never progresses. The status bar always shows zero, and the "Sec" value in the registers window always shows zero. The "States" increments when I simulate, but it seems that uVision doesn't know how to relate that to real time. Is there something other than the "Xtal" frequency in the target's options that needs to be configured?