Sharp mz-3500 Manual For Use page 32

Section A:
General Introduction
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* Filenames
*
******************************
Here are some examples for valid filenames:
ADDRESSl.~ST FILEl FILE2.BAK
whereas the following filenames are erroneous:
ADDRESSES.MST
FILEX:l.BAK
INVENT. 01
A.6.l.l. File Types
the filename is longer than 8 characters.
The remainder is ignored.
contains a colon, which is not
permitted with filenames.
contains a space character in the file type,
which is not permitted at that place.
Let us discuss file types a bit further, because in many cases, it has a
specific meaning.
You can form a multitude of combinations out of the
available with the file type. Let us begin with some
are important with EOS and its international standard,
never be used for another purpose than intended by the
three characters
file types which
and which should
inventor:
.COM
=
denotes a file which contains an executable program. Such
programs can directly be started from the EOS command
level. In section C of this manual we will introduce the
utility programs to you which belong to the EOS scope of
delivery •
• SUB Files of this type contain command sequences, which can be
converted to commands
by
means of the $00 utility •
• SYS these files contain parts of your EOS operating system •
• RSX EOS function module (cf. system manual, section A) .
• BAK denotes a backup file, which contains an old version of a
dataset. Word processors automatically generate such
files. A special function of the
=>
$COPY utility accounts
for this feature. You should always use this file type as
intended by its creators.
EOS User's manual Daeumling & Zimmermann Page 21