EMPTY.FIL

            File: EMPTY.FIL     RT-11  DISTRIBUTIONS   ALL

The contents of this file are present on the CD immediately after the
ISO9660 file structure and the number of blocks in this file has been
chosen so that the next file, README.1ST, begins at block 256 or CD
sector 64.

Essentially, this file is a spacer file which forces README.1ST to begin
at the desired block number within the first RT-11 partition (PART=0).
The remainder of this file contains blocks of all zeros.  This means that
the size of EMPTY.FIL can be made smaller as the ISO9660 file structure
becomes larger without the location of README.1ST changing when files
are burned to the CD - including additional files as they are added to
future versions of the CD.

The advantage is that as long as the contents of the first RT-11 partition
remain unchanged, then the RT-11 file structure is also unchanged and need
not be modified.  Without this file (being made smaller when necessary),
when the ISO9660 file structure becomes larger because additional files
and directories are added to the CD in subsequent versions, the starting
block number of README.1ST changes which requires the RT-11 file structure
to be changed.  Setting up the RT-11 file structure for this CD so that
V05.03 can be booted is a non-trivial process.