For several years I've used a KAM Plus b running Hostmaster Mac on a Classic II. Now I have a TiBook without a serial port. Hostmaster does not seem to be able to 'open' the port. Can anyone please advise? The Keyspan USP/Serial adapter works fine with MacLoggerDX connected to my HF rig (Kenwood 570S). I will appreciate your responses. --Chuck Sherman N3WTO Washington DC