Hi there, I create a project using DAvE and then I import all the files into uVision2. Then, I develop my program and everything in the Simulation mode works fine. The problems are starting when I'm trying to debug my application using the Keil monitor 167. I don't get any output on the serial window and I'm not able to check changes on the memory window or observe any changes to local variables etc... In other words, I think that something is really wrong...! I've tryied many memory and CLASSES combinations but I didn't have any results. I'm using a Pythec KitCON 167CR with 64kB RAM and 256kB FLASH (16 bit DEMUX, using CS0, CS1) The settings that I'm using during the simulation debugging are: ---------------------------------------------------------------- ROM: Start 0x00000h, Size 0x40000h RAM: Start 0x40000h, Size 0x10000h RESERVE (8H-BH, ACH-AFH) VECTAB (0X0000) CLASSES (ICODE (0x0-0xDFFF), NCODE (0x10000-0x1FFFF), FCONST (0x0-0xDFFF, 0x10000-0x3FFFF), HCONST (0x0-0xDFFF, 0x10000-0x3FFFF), XCONST (0x0-0xDFFF, 0x10000-0x3FFFF), NCONST (0x4000-0x7FFF), NDATA (0x40000-0x43FFF), NDATA0 (0x40000-0x43FFF), SDATA (0xE000-0xE7FF, 0xF600-0xFDFF), SDATA0 (0xE000-0xE7FF, 0xF600-0xFDFF), IDATA (0xF600-0xFDFF), IDATA0 (0xF600-0xFDFF), FDATA (0x40000-0x4FFFF), FDATA0 (0x40000-0x4FFFF), HDATA (0x40000-0x4FFFF), HDATA0 (0x40000-0x4FFFF), XDATA (0x40000-0x4FFFF), XDATA0 (0x40000-0x4FFFF)) CINITTAB (0x10000-0x3FFFF) Everything works fine The settings that I'm using during the monitored debugging are: --------------------------------------------------------------- RAM: Start 0x00000h, Size 0x10000h ROM: I don't declare it at all (is that OK?) RESERVE (8H-BH, ACH-AFH) VECTAB (0X0000) CLASSES (NDATA (0x0-0x3FFF), NDATA0 (0x0-0x3FFF), SDATA (0xC000-0xE7FF, 0xF600-0xFDFF), SDATA0 (0xC000-0xE7FF, 0xF600-0xFDFF), IDATA (0xF600-0xFDFF), IDATA0 (0xF600-0xFDFF), FDATA (0x0-0xE7FF), FDATA0 (0x0-0xE7FF), HDATA (0x0-0xE7FF), HDATA0 (0x0-0xE7FF), XDATA (0x0-0xE7FF), XDATA0 (0x0-0xE7FF)) CINITTAB (0x10000-0x3FFFF) And in addition to that I add: NCODE(0x4000-0x4FFF), NCONST(0x5000-0x5FFF) ?C_INITSEC(200h). What am I doing wrong? I would really appreciate your help. I'm starting my 3d Year University project and nobody can help me there!! If I don't sort it out soon I'll find my self into big trouble Thank you very much George