IBM 4840-563 System Reference Manual page 57

be changed to the user-definable character. Table 38 on page 51 shows the format of these five bytes.
Note: A -character in the table indicates a do-not-care bit. The other values relate to the character pixel
positions shown in the diagram following the table. A value of 1 in the appropriate place in the data stream
indicates that the related pixel position is on; a 0 indicates that it is off.
* This is maintained for application compatibility with displays with 5x8 character boxes.
←––––5pixelswide ––––→
IBM Mode
The byte that follows the command byte represents an address between X'15' and X'1A', or
between X'1C' and X'1E' in the currently selected character set. This byte is followed by eight
bytes, which define the actual bit patterns of the user-defined character. Table 39 on page 52
shows the format of these eight bytes.
Note: A -character in the table indicates a do-not-care bit. The other values relate to the character
pixel positions shown in the diagram following the table. A value of 1 in the appropriate place
in the data stream indicates that the related pixel position is on; a 0 indicates that it is off.
* This is maintained for application compatibility with displays with 5x8 character boxes.
Brightness control (04) <EOT>
Purpose:
Specifies a message of up to 45 characters to continuously scroll across the top line of the display.
(Any text on the bottom line does not change.) Any data received after the 45th character are ignored
except for a carriage return (X'0D'). The message starts to display when the carriage return command
is received. If the cursor position is on the top line when this command is received, it is moved to the
first position on the bottom line. If it is on the bottom line, its position does not change. Data continues
scrolling on the top line until a valid character (backspace, horizontal tab, line feed, 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>
Purpose:
Horizontal tab (09) <HT>
SurePOS 500 Model XX3 Technical Reference, v 1.3
←––––5pixelswide ––––→
Alphanumeric message scroll (05) <ENG>
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.
04 nn
Purpose:
05 xxx...
08
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