If
the
first
character
of
the
filename is !
then
the
above messages will be suppressed,
and
you will
not
be
required
to 'press
any
key' for
the
file to be saved. (You
must
make
sure
that
the
RECORD
and
PLAY
buttons
on your cassette
unit
are
down.)
If
your
programs
use
the
!
mark
and
are
also
required
to
run
on disc,
the
!
mark
will be
ignored
during
disc operation (when
the
disc file
name
is being read). Note
that
the!
mark
does NOT occupy one of
the
character
positions
in
the
cassette or disc filename.
Abandoning
the
command
using
the
[ESC]
key
produces
the
error
message on
the
screen:
Broken
in
Read
the
paragraph
entitled
'Successful saving',
earlier
in
this
section.
SPEED
WRITE
The command operates only on cassette,
and
can
be issued while
the
computer is set
to disc operation.
Error
messages
Note
that
error
messages
7,
21, 24, 25, 27,
and
32 (see
part
6
ofthe
chapter
entitled
'For your reference ....
')
will be
generated
during
cassette operation,
if
appropriate.
AMSDOS
external
commands
Input
and
output
direction to
cassette
or disc, is effected by
the
commands:
I TAP E (which
can
be sub-divided into I TAP E • I N
and
I TAP E • 0 U T)
I D I S C (which
can
be sub-divided into I D I se. I N
and
I D I se. 0 U T)
All external commands:
lA
IB
ICPM
IDIR
IDRIVE
IERA
IREN
IUSER
....
are
executed to disc,
regardless
of
whether
cassette operation
has
been selected.
Using Discs and Cassettes
Chapter 4 Page
17
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