User`s guide
66: ILLEGAL TRACK AND SECTOR
The DOS has attempted to access a track or sector which does not exist. M
ay
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 relati•
1
e file plus one sequential
file
may be opened
at
one time, plus the command channel. Do not omit the drive number in a sequent
ial
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
di
sk
memory. To correct, Initialize the diskette.
72:
DISK FULL
Either the diskette
or
its directory
is
full. DISK FULL is sent when 2 blocks are st
ill
available, allowing the current file to be closed. If you get this message and t
he
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 so
me
to another diskette.
73:
DOS MISMATCH (CBM DOS V2.6 1541)
74:
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 t
he
message appears at other times, an attempt has been made to write to a diskette
wi
th
an incompatible format, such as the former DOS I on the Commodore 2040 di
sk
drive. Use one
of
the copy programs on the Test/Demo diskette to copy the desired
file(s) to a
1541
diskette.
DRIVE NOT READY
An attempt has been made to access the
1541
single disk without a formatt
ed
diskette in place. Blank diskettes cannot be used until they have been formatted.
86
PENDIX C: DISKETTE FORMATS
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Format:
Expanded
View
of
a Single
Sector
87
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