Typing
in
for example:
la
Load
"fi
Lename"
.... will tell
the
computer to load
the
specified program from a disc placed in Drive
A.
If
neither
I a nor I b is entered or
the
computer is reset, the system will default to
Drive
A.
If
you
are
t'sing only
the
disc drive within
the
computer, this can be regarded as Drive
A,
and I a or I b commands need not be issued.
Entering
I b when
no
additional disc
drive is connected, will
result
in
the
message on
the
screen:
Drive
B:
disc
missing
Retry,
Ignore
or
CanceL
to which you should respond C (to Cancel).
What
if
I want to
use
cassette?
...
The command I
tap
e tells
the
computer to perform all loading and saving etc.,
commands to
an
external
cassette
unit
instead of to disc. Unless I
tap
e is entered,
the
computer will always default to disc operation when switched on or reset.
To
return
to disc operation after I
tap
e
has
been specified, type in:
Idisc
Alternatively, you may for example wish to load in from cassette and save out to disc.
You may
then
use
the
command:
Itape.in
This command tells
the
computer to read
data
in
from cassette,
but
continue to write
data
out
onto disc
(by
default).
Similarly, to
read
data
in
from disc
and
save out onto cassette, you will first need to
type in: I d i
se.
into
countermand
the
previously issued I
tap
e • i n (above),
then:
I
tap
e • 0
ut
to tell
the
computer to write
data
out onto cassette.
It
can be seen therefore
that
I
tap
e • i n and I
tap
e • 0 u t countermand
I d i
se.
i n
and
I d i
se.
0
ut
respectively, and vice versa.
Further
information on directing
data
to and from discs (and cassette), will be found
in
the
chapters entitled 'Using Discs and Cassettes' and 'AMSDOS and CP/M'
(Chapters 4
and
5).
Chapter 1 Page
76
Foundation Course
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