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INPUT/QUTPUT FUNCTIONS
25.2 -- Device Dependent I/O Functions
CTL-X
01"
CAN
$18
Deletes
all
characters from
the input buffer.
A
carriage
return/line
reed
is displayed
on the
console
to
indicate
that a new input line must be
enteT'ed.
CTL-D
01"
EDT
$04
CTL-M or CR
SOD
Displays
~ne
current contents
of
the input buffeT' fT'om the
first character to
the
last
character entered.
The input
is
not
teT'minated.
This
feature
offers
a
means
of
displaying
a
"clean"
line
after
many
characteT's
have
been
cut
via
the
RUBOUT
key.
Terminates
the
input.
The
carriage return is
the
last
character
placed
into
the
input
bufrer.
A
carriage
return/line feed is displayed
on the console.
All characters are normally echoed
on
the
console
display
mechanism
to
indicate
that they have been
~ntered
into the
i,nput bufferi
howeverl
the following
characters
are
echoed
but are not placed into the input buffer:
ENTRY PARAMETERS:
Character
Value
Null
$00
Line feed
$OA
DCl
$11
DC2
$12
DC3
$13
DC4
$14
B
=
The
ma~imum
number of characters to
be
input
rrom
the
keyboard
(not
including
the
terminating
CR).
Characters entered after the
maximum
has
alread~
been
input will not be
echoed on the console!
no~
will
they
be
placed into the input buffer.
If
B
=
0,
then
only
a
CR
will
be
accepted
from
the
keyboard.
The
function does not return until
a
CR
is entered.
x
= The
address of the input
bUTTer
that
is to receive the data obtained
from
Page
25-03
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