TransAct Ithaca 280 Programmer's Manual page 130

Programming Codes
[ESC] U <0> Select bidirectional print
ASCII [ESC] U <0>
Hexadecimal 1BH 55H 00H
Decimal <27> <85> <0>
IPCL &%GB
EPOS [ESC] U <0>
Description The [ESC] U <0> command prints all data in bi-directional, logic-seeking
print mode.
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280 Programmer's Guide