66: ILLEGAL TRACK AND SECTOR
The DOS has attempted to access a track or sector which does not exist in
the format being used. This may indicate a problem reading the pointer to
the next block.
67: ILLEGAL SYSTEM T OR S
This special error message indicates an illegal system track or sector.
70: NO CHANNEL (available)
The requested channel is not available, or all channels are in use. A maxi-
mum of five sequential files may be opened at one time to the DOS. Direct
access channels may have six opened files.
71: DIR(ectory) ERROR
The BAM does not match the internal count. There is a problem in the
BAM allocation or the BAM has been overwritten in DOS memory. To
correct this problem, reinitialize the diskette to restore the BAM in
memory. Some active files may be terminated by the corrective action.
NOTE: BAM = Block Availability Map.
72: DISK FULL
Either the blocks on the diskette are used or the directory is at its
limit 144 entries. DISK FULL is sent when two blocks are available to
allow the current file to be closed.
73: DOS MISMATCH (73, CBM DOS V2.6 2031)
DOS 1 and 2 are read compatible but not write compatible. Disks may be
interchangeably read with either DOS, but a disk formatted on one version
cannot be written upon with the other version because the format is differ-
ent. This error is displayed whenever an attempt is made to write upon a
disk which has been formatted in a non-compatible format. (A utility
routine is available to assist in converting form one format to another.)
This message may also appear after power up.
74: DRIVE NOT READY
An attempt has been made to access the 2031 Disk Drive without a diskette
present.
PATTERN MATCHING
Pattern matching of file names is available on all Commodore floppies. Pattern
matching uses the question mark (?) and the asterisk (*) to perform operations
on several files with similar names.
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