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Section B:
Command Input
******************************
*
Command Interpretation
*
******************************
If neither file is present (not too unlikely so), the interpreter is at
the end of its capabilities, and it signalizes:
Program not found: OH
But
another thing could happen:
imagine that the "OH.SUB" is
but not so the program $DO which is necessary to interpret the
file. In this case, the message reads:
File not executable: OH
present,
"OH.SUB"
To
summarize:
The first word of a command line is regarded as a
file-
name.
If no file type has been specified, the interpreter automatically
searches for specific file types. As an extension to this mechanism, you
may as well specify a full filename as the first word of a command line,
for example:
B:OH.YES WHAT A NICE COMPUTER!
In
this case,
the file OH.YES is searched for explicitly on
drive
B:
(and loaded, if present there).
B.l.3. Entering Lowercase Letters
There
is a number of tricks you may use when entering
commands.
Maybe
you
feel angry about the fact that all input is con-verted to
uppercase
letters.
If for some stupid accident,
a file has been created the name
of which contains lowercase letters,
you are not able to erase it!
But
do not surrender,
you can get rid of it, of course! Just enclose every-
thing
that
is not to be converted to uppercase letters
in
quotation
marks.
For
example:
There is a file "Junk Yard .DAT
11
you would like
to
erase. The command:
ERASE JunkYard.DAT
will not be successful, there is (hopefully) no file "JUNKYARD.DAT". You
have to enclose the filename in quotation marks:
ERASE
11
JunkYard .DAT''
and
there
you are.
Later on,
we will discuss the
ERASE
command
in
detail.
EOS User's manual
Daeumling & Zimmermann
Page 35
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