Martin, TRT and TRTE are different, but TRTE and TRTRE provide you with everything you need.
o RC=0, no [new] non-zero function byte found (and input exhausted) o RC=1, a non-zero function byte has been found and input is not exhausted o RC=1, a non-zero function byte has been found and input is exhausted. In noth cases R1 + 1 is decremented appropriately. You have everything you need. TRTE and TRTRE are just a lot easier to 'iterate'. You just branch back and 'do it again' until RC=0 obtains. John Gilmore, Ashland, MA 01721 - USA
