Will I had the same problem and was never able to solve it. I tried everything I could think of including posting a question on this list. The general consensus of opinion was that it just doesn't work. I am waiting for the NT compatible version of PICMaster. Steve -----Original Message----- From: William M. Smithers To: PICLIST@MITVMA.MIT.EDU Date: Tuesday, December 01, 1998 9:30 AM Subject: PICMaster Trouble on WinNT 4.0 >My PICMaster Plus works just fine on a Win95 machine, >but when I plug it into NT, it can't see the >serial port. I'm pretty sure I've got the IRQ's, handshaking, >etc correct, but nada. Anybody else seeing this, or >is just my NT configuration? > >-Will >