how to change atmega128 in port.c

/* Hardware constants for Timer1. */
#if (defined _CHIP_ATMEGA128_) | (defined _CHIP_ATMEGA64_)

/* ATmega64, ATmega128 chips, Timer 1 runs in Mode 4 */
#define portCLEAR_COUNTER_ON_MATCH ( ( unsigned portCHAR ) 0x08 ) // WGM13=0 WGM12=1
#define portPRESCALE_64( ( unsigned portCHAR ) 0x03 )
#define portCLOCK_PRESCALER ( ( unsigned portLONG ) 64 )
#define portCOMPARE_MATCH_A_INTERRUPT_ENABLE ( ( unsigned portCHAR ) 0x10 )

#else
#error please modify Timer1 hardware constants to suit your chip
#endif

with atmega2560, please?

I don't think there is an official Codevision port for the AVR, but I guess it will be the same no matter what compiler is used. Do any of the ports here help?
http://interactive.freertos.org/entries/20782373-freertos-winavr-port-for-atmega128-atmega1284p-at90can128-atmega169-atmega16

You can also ask on avrfreaks.net

oh i see, but not understand with winavr,

thanks,