Radio Shack TRS-80 Model II Reference Manual page 149

Utility Programs
Conversion
The diskette format used by TRSDOS
2.0
is different from that of previous versions.
All earlier-version diskettes, both system and data, must be converted before they
can be used by TRSDOS
2.0.
Follow this procedure for converting your older version diskettes.
1. Make backups.
Reset the Computer and insert the old version OfTRSDOS. Use this version to
make a backup copy of all the diskettes that you plan to convert to the new
version. Keep each backup copy in a safe place until the conversion is complete
and confirmed by use. THIS IS VERY IMPORTANT.
2. Check free space map.
Note: This step only applies if the destination diskette is going to contain a full
or minimum system. Skip this step for all data-only diskettes.
Using the older version ofTRSDOS, examine the free space map of each of the
diskettes.
TRSDOS
2.0
requires seven tracks immediately following the directory. Any
diskette that has these seven unused tracks following the directory (usually
tracks
45-51)
may be converted as- is.
Any diskette that does not have these seven free tracks cannot be converted until
the files located on these tracks are moved or killed. You should try to copy the
files onto another less-full diskette, then kill the files from the diskette you are
converting. If you don't know which files are stored on these tracks, then
continue with Step 3. XFERSYS will list exactly which files need to be removed.
For the same reason, there should be no flawed tracks on these same seven
tracks. If there are any flaws, you must hackup the diskette onto another one
which has no flaws in this area.
Note: Ifthe
1.1
or
1.2
diskette has the TRSDOS system on it, then tracks
45-48
will
usually be allocated to TRSDOS files. You do not have to move these files, since
XFERSYS will automatically delete them. However, if user files are allocated to
tracks
49-51 ,
these must be moved.
3. Reset the Computer and insert your
2.0
working master created according to the
instructions in Section 0 of this manual.
Note: The working master contains only those system files that you use from
day to day. The more system files on your master, the longer the XFERSYS
operation will take, and the greater the chance that XFERSYS will be aborted due
to limited disk space.
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