I implemented the example on p.157 of the Getting Started manual on the Phytec mm167 board, along with corrections mentioned in the knowledge base. The example works well in debug mode, and I can flash it into the mm167 with the Keil flash tools. It restarts properly on reset, but is blown away when the power is recycled. Phytec advises excluding the memory space 0x0000AC to 0x0000B0 hex, but that causes the following compile warning: "WARNING L4: MEMORY SPACE OVERLAP FROM: 0000ACH.0 TO: 0000B0H.0" I assume this area has the serial port interrupt vectors to allow the debugger and flash tools work. Any advice on how I can embed the Keil Serial example so that it executes on power up of the module would be appreciated. Thanks, Randy Alley