Advertisement
DUMP COMMAND
11.2 -- DUMP Command Set
The format of a printed sector is shown in section
11.4.
11.2.7 Read sector inta
~hange
buffer -- R
The
R
command
is used to read a specified sector into
the sector change buffer.
Once the sector is in
the
change
burfeT'1
changes
can
be
applied
to it.
The sector change
buffer can then be
~itten
back to diskette.
The
R
command
has
several
forms.
Each
form
of
the
R
command
will
initialize the sector address validity flag
associated
with
the sector change buffer.
This flag allows the change buffer
to
be
re-written to the same sector from which
it
was
read
without specifying the sector address again.
Command Effect
RB
Read
the
Cluster
Allocation iable into
the sector change buffer.
The
RB
command
is
only
valid
in
the Physical Mode of
operation.
RD m
Read the specified logical sector of
the
directory into the change
buff~r.
The
RD
command is only
valid
in
the
Physical
Mode of operation.
R
m
Read the specified sector into the change
buffer.
The current
mode
of
operation
will
determine
whether
II
mil
is
a logical
or a physical sector number.
11.2.8 Write change buffer into sector -- W
The
W
command is used
to
write
the
sector
change
buf~er
into
a
sector.
severa
1
forms.
Command Effect
contents
of
the
The
W command has
W
Write the change
buf~er
back
into
the
sector from which it was originally
~ead.
This form of the W command is only
valid
if
the
U,
D. C,
or F commands have not
been used since the sector change
buffer
was
read into.
CAUTION:
THE
FOLLOWING
FORMS OF THE W COMMAND
CAN DESTRO¥ SYSTEM TABLES OR USER
DATA
IF
USED
INDISCRIMINATELY.
USE
OF
THE
FOLLOWING FORMS
SHOULD
BE
RESTRICTED
TO
DISKETTE
REPAIR
Page
11-07
Advertisement
