Model
II
TRSDOS
Entering a Command
Whenever
the
TRSDOS
READY
prompt
is
displayed, you can type in a
command,
up
to
80 characters.
If
the command line
is
less than
80
characters
(as is usually true), you must press
IMWfi] to signify end-of-line. TRSDOS
will
then
"take"
the
command.
For
example,
type:
CLS
liilmWiI
and
TRSDOS
will clear
the
Display.
Whenever
you type in a line, TRSDOS follows this procedure:
First it looks
to
see if
what
you've typed
is
the name
of
aTRSDOS command.
If
it is,
TRSDOS
executes it immediately.
If
what
you typed
is
not a TRSDOS command, thenTRSDOS will check to see if
it's
the
name
of
a program file
on
one
of
the drives.
When
searching for a file, TRSDOS follows
the
sequence drive 0, drive 1, etc.
- unless you include
an
explicit drive specification with the file name
(described
later
on).
IfTRSDOS
finds a matching program file,
it
will
load and execute
the
file.
Otherwise, you'll get
an
error message.
Keyaheads
TRSDOS
also allows keyaheads of
up
to
80 characters. This means
you
can type
in
the next command while previous ones are being executed.
Note:
A keyahead will not
be
displayed until
TRSDOS
or the application program
is
ready
to
interpret it.
Command Syntax
Command
syntax is the general form
of
a command, like the grammar
of
an
Englishsentence.
The
syntaxtells you how to
put
keywords (like D
IR,
LIST,
and
CREATE)
togetherwith
the
necessary parametersfor each keyword. In
this
book,
we present general syntax inside gray boxes, so they're easy
to
recognize.
There
are
three
general command formats:
1.
N
0-
file commands
2. One-file commands
3. Two-file commands
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