John, Your program worked beautifully writing a SIMH format file on my HP 88780 tape! Thanks a million. Nothing like sending direct SCSI commands to tape from DOS. Drivers are overrated ;-). Marc
================================ Date: Sat, 3 Oct 2015 02:52:36 -0400 From: John Wilson <wil...@dbit.com> My "ST.EXE" program (available from http://www.dbit.com/pub/ibmpc/util/ including source) runs on real DOS (not Windows) and can write from an E11-format .TAP file (which SIMH uses a garbled version of, but they're interchangeable for *even* record lengths which are 99% of the universe) to a real tape[...] John Wilson D Bit ===============================