Epson PX-8 User Manual page 52

from the directory.
If
the space were freed, it would be possible for a new file
to overwrite the start of a current file.
If
the file is the last file on the tape,
the file space will be set free for further use.
To remove a block of files from the middle of a tape, and free the tape for
new files,
o Use the PIP program to transfer the files at the end of the tape into the
RAM disk.
o ERAse all files from the block you want to delete to the end.
o Use the PIP program to replace the end files back on the tape.
WARNING:
The directory is only updated in memory when disk access is carried
out. Only when the tape is removed will the directory be written to
tape. It is especially important to remove a tape using the correct
procedure
if
the ERA command has been used on a Microcassette
tape.
3-24
3.7.3
REN
(Rename a file)
Ii,IIII@"
REN new filename
=
old filename
A file can be renamed at any time by giving this command followed by the new
filename, an equals sign and the old filename. There must be a space between
REN and the new filename. although it is optional either side of the equals sign.
A>REN NEW.COM
=
OLD.COM
A>
has changed the filename "OLD.COM" to "NEW.COM".
If
the new filename you have chosen already exists on that drive, the message
FILE EXISTS is displayed and the comIhand line reappears:
A> REN TESTING.BAS
=
DEMO.BAS
FILE EXISTS
This indicates that there is already a file on drive A: called TESTING.BAS.
This can also happen if you specify the names the wrong way round, since a
test is carried out on the new name before carrying out the renaming.
If
a drive name is specified it must be placed before new filename:
C>REN A:START.COM
=
TESTING. COM
This example will have the result of renaming a file on drive A: called TEST-
ING.COM to be called START.COM.
Bear in mind that this command only renames the file, so the old filename dis-
appears from the directory and is replaced by the new name while the file itself
remains exactly the same. Another important thing to remember is "that you
can only rename files on one drive, . for example:
C> REN A:DEMO.COM
=
B:TESTING.COM
is not allowed and will result in the message:
B:TESTING.COM?
3-25