Hi Aditya,
i am using the msp430-as assembler with -mmcu=msp430x147. the above controller has a code address space from 0x8000. but whenever i include ".org 0x8000" at the beginning of the code and follow it with a mov command like mov #0x5A80,0x0120, i get the output "operand out of range: 32784 (or a similar number)"
I asked Dmitry, the MSP430 maintainer about this. He said:
: The actual asm message will be 'region text is full' cause .org : directive will (as I understand) shift a PC by 0x8000 bytes forward : from the current location. The linker script defines ROM_START at : 0x8000, therefore first instruction will be placed at address 0x8000 + : 0x8000 == 65536 which is out of range. : : The assembler instruction mov #0x5A80,0x0120 will not produce any : error message unless some of operands over 16 bits value. If they are, : the error message will suggest how to fix this problem. Objdump : output will indicate that mov instruction uses PC relative addressing : mode and will show an actual address of the destination operand. : : I probably know where these question come from: some commercial tools : treat '.org' directive as an absolute shift within a whole memory : range. Thus, some people think that there is a bug, then think to read : documentation :)
I hope that this helps. Basically, I think that Dmitry is saying that you do not need the ".org 0x8000" directive as this is already handled by the linker script.
Cheers Nick
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