#include "msp430g2553.inc"

	org 0x0C000
RESET:
	mov.w   #0x400,         SP
	mov.w   #WDTPW|WDTHOLD, &WDTCTL
	mov.b   #11110111b,     &P1DIR		; all pins outputs except P1.3
	mov.b   #01001001b,     &P1OUT		; LED1, LED2 on, P1.3 HI (?)
	mov.b   #00001000b,     &P1REN		; enable resistor for P1.3
	mov.b   #00001000b,     &P1IE		; P1.3 set as an interrupt
	mov.w   #0x0049,        R7			; R7 = 0000 0000 0100 1001
	mov.b   R7,             &P1OUT		; LED1, LED2 on, P1.3 HI (?)
	mov.b	#0x0041,		R8			; value to xor with R7
	EINT								; enable interrupts
	bis.w   #CPUOFF,        SR
PUSH:
	xor.w	R8, 			R7			
	xor.w   #0x0040, 		R8			; 0x0041 -> 0x0001 -> 0x0041
	mov.b 	R7,             &P1OUT		; set LEDs to new state
	bic.b 	#00001000b,     &P1IFG		; interrupt flag P1.3 set to 0
	reti								; return from interrupt

	org 0xffe4
	dw PUSH								; interrupt from button goes here

	org 0xfffe
	dw RESET							; interrupt from reset button goes here