more information gets written to disk as part of the format process.
In particular, the &CAT command will crash as the catalog routine is
apparantly loaded in from disk (T1,S9 in DOS parlance) and then
executed.
(2) needed to clear the keyboard (otherwise the keypress was still
valid when the next disk was booted). Also needed to reduce program
by a few more bytes. By changing the rotate routine and changing
the wording in the message, this code is now only 254 bytes.