Citizen CBM-910 Series User Manual page 41

(12) Bit Image Printing (ESC + "K" + n1 + n2 + n3) Command
With ESC (1BH) + K (4BH) + n1 + n2 + n3 code being input, conversation from Text mode into Bit Image mode
takes place. The n1/n2/n3 assigns amount of transmission of bit image data which follows these.
Where, n1 represents the no. of bytes in lateral direction and n2 (lowermost)/n31 (uppermost) represent
the no. of dot lines vertical direction.
(Relations Between Data and Print-Out)
(Parameter Assignable Range)
Model
24 columns
40 columns
In case that assignment has been made out of the assignable range or n2 = n3 = 0 has been assigned, Bit Image mode
is cancelled and Text mode starts.
With this printer, on completion of read-in of 4-dot-line data or on completion of n1/ n2/n3 assigning data, lacking
data are printed as spaces.
NOTE 1)
With n1 = 23 having been assigned in 40-column Model, 4 dots from the lowermost column (LSB) are made invalid.
This is because the printing position in one line equals 180 dots.
NOTE 2)
On termination of bit image printing, Text mode is reinstated.
CITIZEN
n1 n2
1~18 0~255
1~23 0~255
n3
0~1
0~1
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CBM-910 User's Manual