Appendix B – Printer Control Codes
64 6824 Mobile Full Page Printer User Manual
Set Print Position (relative)
Description: Moves the printhead to a horizontal position on the paper, relative to the current
printhead position. The distance is specified in dots and defined as:
number of dots = n1 + (n2 * 256)
To determine n1 and n2, first calculate the displacement required in 1/120ths of an inch.
If the displacement is to the left, subtract it from 65536.
Maximum displacement is ±960. If the position specified places the printhead outside
the current margins, this function is ignored and the previous setting remains in effect.
This function is also ignored in right, center, and full justification modes.
Decimal: 27 92 n1 n2
Hex: 1B 5C n1 n
ASCII: ESC “\” n1 n2
Select Top-Down Printing
Description: Enables top-down printing (factory default). The first page is printed first.
Decimal: 27 31 0
Hex: 1B 1F 00
ASCII: ESC US (0)*
Select Bottom-Up Printing
Description: Enables bottom-up printing. The last page is printed first.
Decimal: 27 31 1
Hex: 1B 1F 01
ASCII: ESC US (1)*
Select Unidirectional Printing
Description: Turns on unidirectional printing mode. Unidirectional printing moves the printhead from
left-to-right only, allowing for more accurate print positioning during text mode printing.
Decimal: 27 85 1*
Hex: 1B 55 01
ASCII: ESC “U” 1
Cancel Unidirectional Printing
Description: Turns off unidirectional printing mode, allowing the printhead to move in
either direction.
Decimal: 27 85 0*
Hex: 1B 55 00*
ASCII: ESC “U” 0*
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