24: READ ERROR (byte decoding error)
The data or header has been read into disk memory, but a hardware error has been
created
by
an invalid bit pattern in the data byte. May indicate grounding problems.
25: WRITE ERROR (write-verify error)
The controller has detected a mismatch between the data written
to
diskette and the
same data in disk memory. May mean the diskette
is
faulty. If so, try another. Use
only high-quality diskettes from reputable makers.
26: WRITE PROTECT ON
The controller has been requested to write a data block while the write-protect
sensor is covered. Usually caused
by
writing
to
a diskette whose write protect notch
is
covered over with tape to prevent changing the diskette's contents.
27: READ ERROR (checksum error
in
header)
The controller detected an error in the header bytes of the requested data block. The
block was not read into disk memory. May indicate grounding problems. Usually
unrecoverable.
28:
WRITE ERROR (long data block)
The controller attempts to detect the sync mark of the next header after writing a
data block.
If
the sync mark does not appear on time, this error message
is
generated. It
is
caused
by
a bad diskette format (the data extends into the next
block) or
by
a hardware failure.
29:
DISK ID MISMATCH
The disk controller has been requested
to
access a diskette which has not been
initialized. Can also occur if a diskette has a bad header.
30: SYNTAX ERROR (general syntax)
The DOS cannot interpret the command sent
to
the command channel. Typically,
this is caused
by
an illegal number
of
file
names or
an
illegal pattern. Check your
typing and try again.
31: SYNTAX ERROR (invalid command)
The DOS does not recognize the command.
It
must begin with the first character
sent. Check your typing and try again.
32: SYNTAX ERROR (long line)
The command sent
is
longer than
58
characters. Use abbreviated disk commands.
33: SYNTAX ERROR (invalid
file
name)
Pattern matching characters cannot be used
in
the SA
VE
command or when
Opening files for the purpose of Writing new data. Spell out the
file
name.
34:
SYNTAX ERROR (no
file
given)
The
file
name was left out
of
a command or the DOS does not recognize it
as
such.
Typically, a colon (:) has been omitted. Try again.
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