Thanks Eric. The DS-XA CEIBO Debugger is an excellent tool. However, I have some problems with binary files. I am using Philips HEXutils, but both CEIBO and Philips XA ToolsSet IDE returns various file format errors. That is absolutely inexplicable for me. Also, I'm still searching for disassembler, which I need most. Unfortunatly IDA pro 4.5 which I use, doesn't support XA family. Best regards.

Franciszek Gert