Commodore 64 Handbook page 27

been over— written in DOS memory. To correct this
problem re-initialise the diskette to restore the
BAM in memory- Some active files may be
terminated by the corrective action.
DISK FULL (72 00 00)
Either the blocks on the diskette are used, or the
directory is at its limit (152 entries).
DOS MIS-MATCH (73 00 00)
Data written to a diskette using any one version
of DOS may be read using any other version of DOS.
However, you must write to a diskette using the
same DOS version with which the diskette was
initialised. Error 73 is reported if you attempt
to write to a diskette using a different version
of DOS from the one which created and initialised
the diskette.
DRIVE NOT READY (74 00 00)
An attempt has been made to access the 8050
diskette unit with the selective drive.
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