Intermec Janus 2050, User Manual

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JANUS 2050 Vehicle-Mount Computer User’s Manual (4MB) nubbet nubbet c
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If you want a protocol handler to always be present, you can include the
command line in your AUTOEXEC.BAT file. However, this requires more
memory to operate the JANUS 2050.
Loading/Unloading Protocol Handlers With IRL Desktop or
Communications Manager
You can load a protocol handler for a designated port when you execute the
IRL Desktop or the Communications Manager utility. When you exit the
program, the protocol handler is unloaded. To load a protocol handler when
executing IRL Desktop or Communications Manager, you enter the following
command at the DOS prompt:
{ application} -[{port}{ph}]
where:
application is the application you are executing. For IRL Desktop, enter irl. For
the Communications Manager, enter cmgr
.
port indicates the port for which you are loading the protocol handler. To load
the protocol handler for COM1, enter 1.
ph is the notation for the protocol handler you want to load. For the Intermec
protocol handler, enter i. For the PC Standard protocol handler, enter p.
For example, to load the Intermec protocol handler on COM1 and execute the
IRL Desktop, you enter the following command at the JANUS 2050 DOS
prompt:
irl -1i
Specifying a Value for the FIFO Control Register
The First In First Out (FIFO) control register contains a hex value that controls
the Universal Asynchronous Receiver/Transmitter (UART) buffer. For
example, the FIFO control register can enable UART 16x550 mode and require
the buffer to receive four bytes of data before generating a receive interrupt.
If you turn off your JANUS device while running a communications
application, the device cannot save the contents of the UART FIFO control
register. When you turn the device back on, the device sets the FIFO control
register to its default value, 0 hex, unless you have already specified a value
that the device can use to restore the FIFO control register. You should specify
another value if the default is not appropriate for the JANUS 2050 UART FIFO
control register.