Epson PX-8 User Manual

/"- WARNING:
W USING WILDCARDS WITH THE ERA COMMAND
It is very easy to erase files you do not wish to erase from a drive by using wild-
cards with the
ERA command.
TO A VOID
ACCIDENTS use the DIR command with the same wildcard op-
tion you wish to use. The files displayed by the DIRectory will then be the ones
ERAsed. This will ensure that you know what
your action will be without caus-
ing anything drastic to happen.
IF YOU ARE USING 'SYS' FILES these will be deleted by the ERA command,
even though
you did not see them on the directory. To avoid accidents use the
STATprogram to check the complete list
offile names if you are using 'SYS' files.
Alternatively delete files one at a time.
b) Erase all files
on a drive
This
is achieved by using the asterisk wildcard. Since this is drastic action, it
results in a question from the PX-8 asking
if you are sure you want to erase
all the files:
A>ERA *.*
ALL (YIN)?
If you answer N execution will be terminated, and answering Y will result in
all the files in the directory being ERAsed. Any files NOT in the directory
will
not be erased, that is system files and those with the SYS attribute set.
To erase all files
on another drive the drivename must be specified:
C>ERA D:*.*
ALL (YIN)?
c) Erase all files with the same filename on any drive
The asterisk wildcard can be used
to erase all the files on a particular drive,
which have the same name but whose extensions differ.
D>ERA START. *
will erase all those files on drive D: whose filename is START and whose ex-
tension is anything, for instance, START.ASM, START.BAS or START.DAT.
C>ERA D:START.*
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will have exactly the same effect but is executed when C: is the logged-in drive
instead
of D:.
d) Erase all files with the same extension on any drive
To do this you must specify the extension in full but use the asterisk wildcard
to allow any filename:
C>ERA *.COM
will erase all the files on drive C: having the extension COM.
C>ERA D:*.BAS
will erase all files on drive D: with the extension BAS, that is, all BASIC pro-
gram files.
e) Erase all files with similar names or extensions on any drive \
Here you can use both the asterisk and the question mark wildcards. The aster-
isk replaces
an entire filename or extension and the question mark replaces in-
dividual characters in the filename or extension:
C>ERA S?????*
will erase all files on drive C: with any extension and whose filename consists
of six characters beginning with S.
C>ERA D:TES?????BAS
will erase all those files on drive D: whose extension is BAS and whose file-
name begins with TES.
D>ERA A:DEMO????A
will erase all files on drive A: whose filename consists of six letters beginning
with DEMO and whose extension ends in A.
f) Erasing Files on a Microcassette drive.
On a conventional drive when a file
is removed from the directory, the disk
is opened up for saving other files. On a Microcassette tape the files are saved
sequentially as a single block. This means that the removing a series
of files
from a tape directory does not free up the tape.
It will simply removes the name
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Epson PX-8 Specifications

General

Brand	Epson
Model	PX-8
Category	Laptop
Language	English