;
; hello8.osc.asm
; (c) Neil Gershenfeld CBA MIT 9/4/04
; bit timing test
;

.include "tn15def.inc"
.equ oscpin = PB3
.def one = R16
.def zero = R17
.def temp = R18

.cseg
.org 0
rjmp reset

;
; main program
;
reset:
   ldi temp, 0xff ; maximum RC clock
   out OSCCAL, temp
   sbi DDRB, oscpin; init oscpin
   ser one
   clr zero
   loop:
      out PORTB, one
      out PORTB, zero
      out PORTB, one
      out PORTB, zero
      rjmp loop