66:
ILLEGAL TRACK AND SECTOR
The DOS has attempted
to
access a track or sector which does not exist. May
indicate a faulty link pointer
in
a data block.
67: ILLEGAL SYSTEM T OR S
This special error message indicates
an
illegal system track or block.
70: NO CHANNEL (available)
The requested channel
is
not available or
all
channels are in use. A maximum of
three sequential files or one relative
file
plus one sequential
file
may be opened at
one time, plus the command channel. Do not omit the drive number
in
a sequential
OPEN command, or only two sequential files can be used. Close all files
as
soon
as
you no longer need them.
71:
DIRECTORY ERROR
The BAM (Block Availability Map) on the diskette does not match the copy
in
disk
memory. To correct, Initialize the diskette.
72: DISK FULL
Either the diskette or its directory
is
full. DISK FULL
is
sent when two blocks are
still available, allowing the current
file
to
be closed. If you get this message and the
directory shows any blocks left, you have too many separate files
in
your directory,
and will need to combine some, delete any that are
no
longer needed, or copy some
to another diskette.
73: DOS MISMATCH (CBM DOS V3.0 1571)
If the disk-error status
is
checked when the drive
is
first turned on, before a
directory or other command has been given, this message will appear.
In
that use, it
is not an error, but rather an easy way
to
see which version
of
DOS
is
in use. If the
message appears at other times, an attempt has been made
to
write
to
a diskette with
an incompatible format, such as the former
DOS
1 on the Commodore 2040 disk
drive. Use one
of
the copy programs on the TestlDemo diskette
to
copy the desired
file(s)
to
a
1571
diskette.
74: DRIVE NOT READY
An attempt has been made
to
access the
1571
single disk without a formatted
diskette in place. Blank diskettes cannot be used until they have been formatted.
102
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