Erasing The Most Significant Bit; Switch Off Protocol; Back-Up Of Files - Sharp mz-3500 Manual For Use

Section C:
Utility Programs
****************
*
$COPY
*
****************
C.4.5.6. Erasing the Most Significant Bit
Some word processors generate
characters is set. Under certain
processed by other programs. But
copying such a file, the most
automatically masked off.
files in which bit 7 of a number of
circumstances, these files cannot be
if you specify the option "+ZERO" when
significant bit of each character is
C.4.5.7. Switch Off Protocol
This option has been implemented for those calm people who deem $COPY
too verbose. When you activate this option by "-PROT 11
,
there will be no
copy protocol any longer. In case of errors, however, the file affected
will be indicated as explained previously.
C.4.5.8. Back-up of Files
This is a very interesting option. It provides for selectively copying
only those files which have been altered since the most recent copy
process. For this purpose, $COPY evaluates the BACKUP attribute of a
file (see also
=>
$SET) . If $COPY finds a file without this attribute,
this will be copied and afterwards, it gets a BACKUP attribute attached.
If a file is changed later on, EOS automatically resets the BACKUP
attribute, so the file will be regarded at the next copy run. If you
specify the option 11 +BACKUP 11
,
$COPY switches to back-up or data secur-
ation mode:
$COPY A:*.COM B: +B
EOS V3 File copy program
4
Files found.
A:PROGMl .COM
19 KB copied to B:PROGMl .COM
~-·,
A:PROGM2 .COM
8
KB
already saved, not copied.
A:PROGM3 .COM 19 KB
already saved, not copied.
A:PROGM4
.COM
2
KB copied to B:PROGM4
.COM
After copying is finished, all four files have their BACKUP attribute
set.
EOS User's manual
Daeumling & Zimmermann
Page 56