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Horizontal 1200-dpi Image Format Mode (raster Graphic Mode 1027) - Brother HL-1050 Technical Reference Manual

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6.3.13. Horizontal 1200-dpi image format mode (Raster Graphic Mode 1027)

The printer supports 1200 dpi printing for special image formats in 1200 dpi mode. We recommend that the
installed printer memory is 10 Mbytes or more for 1200 dpi printing.
To set 1200 dpi mode,
1. Set 1200 dpi printing mode by using the following PJL command:
@PJL SET RAS1200MODE = ON
2. Choose PCL mode with the following PJL command:
@PJL ENTER LANGUAGE = PCL
(If you select a mode other than PCL mode, 1200 dpi printing mode cannot be selected.)
The PCL Mode set command for 1200 dpi Image Format is ESC *b1027M. The transfer raster data command
(ESC*b###W) then transfers horizontal 1200 dpi data.
<1200 dpi Graphic Data Compression Format>
This compression format consists of blocks of data 64 dots down the page starting from the leading edge of the
paper.
i.e.: If the graphic data extends over three bands as shown in the following diagram, it transfers the data as
three blocks of data:
ESC*b##W <Block 1> <Block 2> <Block 3>
0
64
128
192
256
320
In mode 1027, the transfer graphic data command byte count does not have a limitation of 32,767 bytes.
The block data is composed as follows:
Position
Data
0 - 1
Block length
2 - 3
Horizontal position
4 - 5
Vertical position
6
Height dots
7 - 8
Width words
9 - (n - 1)
Compression data
i.e.: Data is at horizontal position = 256, vertical position = 64, height = 32 dots, width = 100 x 16 bit words
(1600 dots), and compression data is 800 bytes;
ESC*b809W 03h 27h 01h 00h 00h 40h 20h 00h 64h [Data800Byte]
 _ 
0
(256, 64)
64
128
Block 1
Block 2
Block 3
Description
n - 2
dots from the left of the page
dots from the leading edge of the
page
number of image vertical dots
number of image horizontal 16 bit
words
compression image data
 _ 
 _ 
|
a
b
c
Band 1
32
Band 2
1600
CHAPTER 2 "PCL" - 91
Band 1
Band 2
Band 3
Band 4
Band 5
 _ 
|
d
e
f
a: Block length(807)
b: Horizontal position(256)
c: Vertical position(64)
d: Height dots(32)
e: Width words(100)
f: Compression image data
8/2/2010

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