;=======================================================================
;Assembly Language Tutorial for the SX Microcontroller
;Program 4.2
;=======================================================================
		device	sx28l,oschs3
		device	turbo,stackx,optionx, watchdog
		IRC_CAL	IRC_SLOW
		reset	start_point
		freq	500000  	; 500 kHz


		org     8         	; data start
outval	    	ds	1

ledport		= 	rb
flipmask	equ	$FF

                org     0	    	; code start

start_point     mov     !ledport,#0    	; make all of port b outputs
					; changed to use single 
					; instruction to xor with 
					; constant
agn             xor     outval,#flipmask
                mov     ledport,outval
                sleep