FWIW, d|i|g|i|t|a|l sold a device, part number 29-32549-01, which did exactly what is being asked. Information is available in the OpenVMS FAQ, Ch.14, Sect.18 available here: http://labs.hoffmanlabs.com/vmsfaq/vmsfaq_024.html#supp4 I, myself, own one but I'm not parting with it. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG I speak to machines with the voice of humanity.