Carriage return, Test, Clear display – IBM 32x User Manual
Page 42: Display position, Delete to end of line, Carriage, Return, A-10, Clear, Display
Carriage
return
0D
Purpose:
The
write-in
position
is
shifted
to
the
most
significant
digit
of
the
same
row.
If
the
write-in
position
is
on
the
most
significant
digit,
the
command
is
ignored.
Test
0F
Purpose:
Causes
the
40
characters
in
the
IBM
code
page
437
character
(X'20'-X'47')
set
to
be
displayed
one
time.
In
addition,
at
the
end
of
the
test,
a
test
pattern
is
written
that
turn
all
pixels.
When
Test
is
working,
all
codes
are
ignored.
The
test
command
X'OF'
is
only
available
when
the
IBM
code
page
437
is
selected.
When
the
other
font
table
except
IBM
code
page
437
is
selected,
test
code
is
ignored.
Clear
display
(1B),
(5B,
32),
(4A)
Purpose:
All
the
displayed
characters
are
erased.
The
write-in
position
is
not
changed.
Display
position
1B
5B
Py
3B
Px
48
Purpose:
Instead
of
writing
the
character
from
the
first
digit,
use
this
command
to
specify
the
write-in
start
position.
The
write-in
position
is
shifted
with
Py
and
Px
and
is
based
on
the
half-size
letter
of
the
font,
which
is
specified
with
the
Screen
Mode
command.
Py
indicates
the
position
of
the
row
and
Px
the
digit.
Py
and
Px
must
be
defined
under
the
following
conditions:
v
If
Py
is
0,
it
is
set
to
1
(X'31').
v
If
Py
is
greater
than
the
bottom
row,
it
is
set
to
the
bottom
row.
v
If
Px
is
0,
it
is
set
to
1
(X'31').
v
If
Px
is
greater
than
the
least
digit,
it
is
set
to
the
least
digit.
A
special
form
of
the
display
position
command
exists
(1B
5B
48
27),
which
sets
the
write-in
position
to
the
home
position
(Py=1
and
Px=1).
Delete
to
end
of
line
1B
5B
30
4B
Input/output
device
commands
11-9-2005
A-10
SurePOS
Installation
and
Service