Small changes for the ATmega1284.

http://code.google.com/p/arduino/issues/detail?id=736

Author: damellis

hardware/arduino/cores/arduino/WInterrupts.c

@@ -121,8 +121,6 @@ void attachInterrupt(uint8_t interruptNum, void (*userFunc)(void), int mode) {
     #elif defined(MCUCR) && defined(ISC20) && defined(GIMSK) && defined(GIMSK)
       MCUCR = (MCUCR & ~((1 << ISC20) | (1 << ISC21))) | (mode << ISC20);
       GIMSK |= (1 << INT2);
-    #else
-      #warning attachInterrupt may need some more work for this cpu (case 1)
     #endif
       break;
 #endif

hardware/arduino/cores/arduino/wiring_analog.c

@@ -45,6 +45,8 @@ int analogRead(uint8_t pin)
 	if (pin >= 54) pin -= 54; // allow for channel or pin numbers
 #elif defined(__AVR_ATmega32U4__)
 	if (pin >= 18) pin -= 18; // allow for channel or pin numbers
+#elif defined(__AVR_ATmega1284__)
+	if (pin >= 24) pin -= 24; // allow for channel or pin numbers
 #else
 	if (pin >= 14) pin -= 14; // allow for channel or pin numbers
 #endif