In the past we have used a default I/O port address of hex 330-333 for SEC 16-bit software examples. Recently we have found that if you have a PnP Sound Blaster (or clone) Windows 95 likes to put its audio processor as 330, conflicting with the SEC. There are also reports of conflicts with SCSI controllers at 330. From Windows 95's standpoint, the SEC is a "Legacy" (non-PnP) product that it doesn't know about. You can either move it to an unlikely I/O address, reserve a range of I/O ports for it in the Resource database, or both. We suggest that you decide on an I/O port address (we have used hex 364-367 in the Delphi examples) and enter it manually into Windows 95's Resource data base. The steps are as follows: Start Settings Control Panel System Device Manager Computer (you might not have guessed) Properties Reserve Resources Input/Output (I/O) Add Start = 0364 End = 0367 Ok Ok Ok