Hello!

char test(unsigned char *PA)
{
char i, temp=0;

for(i=0;i<9;i++){
temp = temp + *(PA+i);
*(PA+i) = 0;
}
return temp;
}


unsigned char idata global_array[] = {1,2,3,4,5,6,7,8,9,10};
main()
{
char temp;

temp = test(&global_array[0]);
}

I think, it should work.
Jacek