Locating code at a certain address

There is no trouble if it is external flash accessed as external DATA. In this case just use:

unsigned char xdata table1[size_1] _at_ address_1;
unsigned char xdata table2[size_2] _at_ address_2;

There is no trouble if it is external flash accessed as external DATA. In this case just use:

unsigned char xdata table1[size_1] _at_ address_1;
unsigned char xdata table2[size_2] _at_ address_2;

But if it is PROGRAM memory (CODE segment) then you should use linker options because it is not possible to do something like:

unsigned char code table_1[size_1] _at_ address_1 = "blabla";