MSP430 extended address bus

Hi,
I am trying to compile the MSP430 demo project with IAR.  The MSP430F449 compiles with 1 warning.  If I try a different MSP with extended address bus (20-bit) then I get a series of warnings, Warning: Only 16bit will be pushed to the stack. Use size specifier to avoid warning. ….. I figure this is because the stack size of this processor is now unsigned long instead of unsigned short as in the 449. So If I redefine:
#define portSTACK_TYPE unsigned portSHORT
to:
#define portSTACK_TYPE unsigned portLONG and change the define:
#define portBYTE_ALIGNMENT 2
to:
#define portBYTE_ALIGNMENT 4 I don’t see any change.  Does anyone have any experience with the MSP430 with extended address bus? Thank you for your time,

MSP430 extended address bus

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