IBM 03R5900 Service Guide - Page 37

Backspace, <BS&gt, Horizontal, <HT&gt, <LF&gt

Get IBM 03R5900 - SurePOS 300 - 4810-31H PDF manuals and user guides View all IBM 03R5900 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 37 highlights

11-9-2005 Input/output device commands carriage return, or display position command is written to the top line. The test and reset commands stop the scrolling message regardless of the display position. Backspace (08) 08 Purpose: Decrements the cursor position by one and clears any character displayed in that position. If the write position is at the lower left, the position is moved to the upper right, and if it is at the upper left, it is moved to the lower right. This commands stops the scrolling alphanumeric message if the cursor position is on the top line when this command is sent. Horizontal tab (09) 09 Purpose: Increments the cursor position by one. No characters are erased. This command stops the scrolling message if the cursor position is on the top line when the command is sent. At the end of a line, the display behavior is determined by the state of the display control mode as follows: Normal Display Control Mode (DC1) If the cursor is at the upper right position, it is moved to the lower left position. If the cursor is at the lower right position, it is moved to the upper left position. Vertical Scroll Display Control Mode (DC2) If the cursor is at the upper right position, it is moved to the lower left position. If the cursor is at the lower right position, the characters displayed on the bottom line are moved to the top line, the bottom line is cleared, and the cursor is moved to the lower left position. Line feed (0A) 0A Purpose: The display behavior is determined by the state of the display control mode as follows: Normal Display Control Mode (DC1) The cursor is moved to the same position in the complementary line. In this mode, a line-feed command stops the scrolling alphanumeric message if the cursor is on the top line when this command is sent. Vertical Scroll Display Control Mode (DC2) If the cursor is on the top line, it is moved to the complementary position on the bottom line. If the cursor position is on the bottom line, all characters on that line are moved to the top line, the bottom Appendix A. Input/output device commands A-5

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
carriage
return,
or
display
position
command
is
written
to
the
top
line.
The
test
and
reset
commands
stop
the
scrolling
message
regardless
of
the
display
position.
Backspace
(08)
<BS>
08
Purpose:
Decrements
the
cursor
position
by
one
and
clears
any
character
displayed
in
that
position.
If
the
write
position
is
at
the
lower
left,
the
position
is
moved
to
the
upper
right,
and
if
it
is
at
the
upper
left,
it
is
moved
to
the
lower
right.
This
commands
stops
the
scrolling
alphanumeric
message
if
the
cursor
position
is
on
the
top
line
when
this
command
is
sent.
Horizontal
tab
(09)
<HT>
09
Purpose:
Increments
the
cursor
position
by
one.
No
characters
are
erased.
This
command
stops
the
scrolling
message
if
the
cursor
position
is
on
the
top
line
when
the
command
is
sent.
At
the
end
of
a
line,
the
display
behavior
is
determined
by
the
state
of
the
display
control
mode
as
follows:
Normal
Display
Control
Mode
(DC1)
If
the
cursor
is
at
the
upper
right
position,
it
is
moved
to
the
lower
left
position.
If
the
cursor
is
at
the
lower
right
position,
it
is
moved
to
the
upper
left
position.
Vertical
Scroll
Display
Control
Mode
(DC2)
If
the
cursor
is
at
the
upper
right
position,
it
is
moved
to
the
lower
left
position.
If
the
cursor
is
at
the
lower
right
position,
the
characters
displayed
on
the
bottom
line
are
moved
to
the
top
line,
the
bottom
line
is
cleared,
and
the
cursor
is
moved
to
the
lower
left
position.
Line
feed
(0A)
<LF>
0A
Purpose:
The
display
behavior
is
determined
by
the
state
of
the
display
control
mode
as
follows:
Normal
Display
Control
Mode
(DC1)
The
cursor
is
moved
to
the
same
position
in
the
complementary
line.
In
this
mode,
a
line-feed
command
stops
the
scrolling
alphanumeric
message
if
the
cursor
is
on
the
top
line
when
this
command
is
sent.
Vertical
Scroll
Display
Control
Mode
(DC2)
If
the
cursor
is
on
the
top
line,
it
is
moved
to
the
complementary
position
on
the
bottom
line.
If
the
cursor
position
is
on
the
bottom
line,
all
characters
on
that
line
are
moved
to
the
top
line,
the
bottom
Input/output
device
commands
11-9-2005
Appendix
A.
Input/output
device
commands
A-5