dtos8cvt converts a PDP-8 DECtape image from OS/8 format to simulator format.

OS/8 only uses 128 words out of 129 in a PDP-8 DECtape block.  The simulator
requires all 129 words, in order to simulate the actions of the hardware, and
to deal with oddball software systems such as the PDP-8 Disk Monitor.

dtos8cvt is invoked by

	dtos8cvt file1 file2 file3...

Each file in turn is converted from OS/8 format to simulator format.  The
input file can have any extension; the converted file will have a .dt8
extension.