MCUREGS = { 'P1IN': '$20', 'P1OUT':'$21', 'P1DIR':'$22', 'P1REN':'$27', 'P2IN' :'$28', 'P2OUT':'$29', 'P2DIR':'$2a', 'P2REN':'$2f', 'P3IN': '$18', 'P3OUT':'$19', 'P3DIR':'$1a', 'P3REN':'$10', }