ORG RESET
	jmp main
ORG TIMER0
	; timer interrupt only used to wake the processor
	clr tr0
	reti

main:
	setb ea		; enable interrupts
	setb et0	; enable timer0 interrupt
	mov tl0, #0	; start timer counter at zero
	mov th0, #0	; these two values dictate the length of sleep

	mov a, pcon	; copy power control register
	setb a.0	; set idl bit
	setb tr0	; start timer
	; sleeping...
	mov pcon, a	; move a back into pcon (processor sleeps after this instruction finishes)

	; when the timer overflows and the timer interrupt returns, execution will resume at this spot

	; Awake!
	jmp $