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P r i n t e r I n t e r f a c e I n f o r m a t i o n H P D e s k J e t P r i n t e r s
Nibble Mode
Nibble mode is a unidirectional mode of operation in which data moves
from the printer to the host computer. HP DeskJet printers and most
computer hosts can operate in nibble mode. Hosts can switch back and
forth between compatibility and nibble modes, thus establishing limited
two-way (bi-directional) communication. The host must place itself and
the printer into nibble mode to receive status from the printer. This type of
bi-directional communication has previously been called “Bitronics.”
ECP Mode
ECP mode provides a true bi-directional link between the printer and the
host computer. HP DeskJet printers and most computer hosts can
operate in ECP mode. ECP mode, combined with the HP proprietary
communication protocol, allows the Remote Control Panel for DOS and
the HP DeskJet Status Monitor for MS Windows to receive and display
status information from the printer.