Thanks for your feedbacks.

I'm using the old version of Keil compiler 'uVision 1'. And I don't find any option to include CSTARTUP and INIT files in my hex file automatically as it was done in-line on IAR compiler

When reading the HEX file, there is only the bytes of the main function. There is not the CSTARTUP file included.
Thus, the origin adress is 0000h and there isn't the vector or stack init.
So I suppose I've to include manually the CSTARTUP file before exectuting the main function.


Dennis, You may have misunderstood. I've only 1 main function on this example.

Erik, yes I'm wrong on the AUXR setting, It was supposed to be set to 0x01 in order to switch off ALE, isn't it ?
Please, be indulgent, This is my first attempt to use 8051, I was only working on 68HC11 with C compiler and Zilog with assembler before... I'm not so familiar with the boot and init procedures. Moreover, I hadn't to look so closely to these items because the compiler was already set and provided with the init files designed for my target.

For 8051, my Keil compiler isn't set at all and I've to discover each parameter and it purpose. It's not a piece of cake...

Stephane