Hi Klaus,
Sorry for delay in getting back on this. I have done the experiment with ADSP-21489 and concluded that the first value in the loader file need not to be 0xA5. It can be anything, and this 32 bit bill be ignore by the master. The actual application code is coming after this first 32 bit word. The 0xA5 is automatically generated by the loader to identify the first word.
Regards,
Jithul