after all consideration it comes down to, can you use DVK on a com port, or only on LPT ports? thyanks Carl Semper Fi (former active duty Jar-head) Cpl USMC 1966 - 1972 RVN 6/67 - 7/69 "For those who fought for it, freedom has a flavor the protected will never know" Unknown Marine, Khe Sahn, Viet Nam 73 De W2SGX .-- ..--- ... --. -..- FN12um