Declaration pointer to a structure as far

[ccs]

Hi All,

Consider,

struct ab
{
unsigned char tag;
unsigned char len;
unsigned char value[2];
}

struct cd
{
unsigned char tag;
unsigned char len;
unsigned char value[2];
}

struct ef
{
unsigned char tag;
unsigned char len;
unsigned char value[2];
}

struct fcb
{
struct ab a_b;
struct cd c_d;
struct ef e_f;
}

Now i will declare pointer to a structure fcb as

struct fcb *FCB_add;

Please let me know how to declare pointer to struct fcb as far pointer?
iam using IAR complier for Atmel's AVR controller.

Can i declare as,
struct __far fcb *FCB_add;
or
__far struct fcb *FCB_add;

FCB_add=0x424100;// i want FCB_add should point to the physical address 0x424100.

Please help me.

Thanks
CCS

[Banfa]

Since __far is not a standard C keyword but an extension of the compiler you are using I suggest you check the documentation that came with it. However assuming it has a __far keyword then I suspect you need

struct fcb __far *FCB_add;