Commodore 16 - Page 87

66
ILLEGAL TRACK
AND SECTOR
67
70
ILLEGAL SYSTEM
TORS
NO CHANNEL
(available)
71 DIRECTORY ERROR
72
DISK
FULL
73
DOS MISMATCH
(73,
CBM DOS V2.6
1541)
The DOS has attempted
to ac-
cess a track or block
which
does
not
exist in the format being
used
This may indicate
a
problem read-
ing the pointer
to
the next block
This special error message
indicates an illegal system
track or sector
The
requesied channel is
not
available, or all channels are in
use A maximum ol five sequential
files may be opened al one lime to
the DOS Direct access channels
may have six opened tiles
The BAM does not match the
internal count Tiere
is
a problem
in
the
BAM allocation or the BAM
has been
overwritten
-n 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
Either tne blocks on the diskette
are
used
or the directory is at
its
enlry limit.
DISK FULL is sent
when
two
blocks are available
on
the
1541 to allow the current
Me to be closed
DOS
1 and 2
a»e
'ead 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
be-
cause
the
format
is different This
error is displayed whenever an
170
I
74
DRIVE
NOT
READY
attempt is made to write upon
a
disk which has been formatted in
a non-compatible formal. (A utility
routine
is
available
to assist
in
converting
Irom
one
format
to
another) This message
may
a(so
appear after power
up.
An attempt has been made to
access the
Floppy Disk Drive
without any diskette present
171