Chuck, Could you share your DOS code with me too? I just assembled the hardware for that: a self loading HP88780B SCSI-1 9-track Tape Drive, a vintage DolchPac 65 PC that can multi boot XP, Win98 and DOS fitted with an old SCSI-1 card. And I am reading the SCSI protocol book in the evenings ;-). Your DOS SCSI tape software and source would give me a prodigious head start... I also have Pertec-interfaced Overland Data tape drive, that will be step 2. This is a more straightforward interface. And an HP-IB interfaced HP7970E tape drive waiting in the wings. Marc