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Using a PAL
Print and Program capable printer solves this problem. In this
TM
case a PAL
program is written which interprets a data stream normally sent to
the legacy device being replaced. This program is stored on the printer and is
automatically executed each time the printer is powered on. This program is able
to produce a new label format based on this legacy data. Even though the host
computer is sending the exact same legacy data to the printer, the label format
can be completely different. For example the new format may include bar codes,
scaled and/or rotated fonts, lines, logo's etc. Even though the legacy device
being replaced does not support these print abilities, the new label format can.
For example, text only outputs such as produced by a dot-matrix printer or card
embosser may now be presented in a more functional format. Information in the
data stream can be reformatted into any size font in any rotation, or even printed
TM
as bar code. This example demonstrates how PAL
Print and Program capable
printer can replace a legacy print device with no host software changes required.
PAL Data Stream
Legacy Data
Application
Stream
PAL
Interpreter
Printer
Flash Memory
Printed
Document
Legacy Data
Stream
Host System
PAL Printer
Standalone/downtime applications
TM
PAL
Print and Program capable printers may be programmed to operate
independent of a PC/host connection. This standalone ability may be used in
cases where no PC/host connection is needed or as a fail-safe backup when the
PC/host or network is unavailable. The Standalone Application program is stored
in the printer memory and can accept input from a PS/2 keyboard, bar code
scanner, or other serial devices such as an electronic scale. These programs
may use the printer's LCD to prompt for user input and may also include
databases. Unlike other bar code printers that allow basic static forms to be
loaded in the printer, PALTM Print and Program capable printers provide
advanced abilities.
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