;=======================================================================
;Assembly Language Tutorial for the SX Microcontroller
;Program 7.2
;=======================================================================
		device	sx28l,oschs3
		device	turbo,stackx,optionx
		IRC_CAL	IRC_SLOW
		reset	start_point
		freq	50000000   	; 50 MHz
		org	8
rtcc1		ds	1

		org	0
isr		inc	rtcc1
		cjne	rtcc1,#$4D,iout	; blink every $4D00 periods
		xor 	rb,#$FF
; reset time
		clr	rtcc 
		clr	rtcc1
iout
		reti

start_point
		mov   	!rb,#$80    	; 7 outputs

; set RTCC to internal clock 1:256 ratio
		mov	!option,#$87
loop
		jmp	loop