Intermec Janus 2020 Reference Manual - Runtime Requirements

JANUS PSK for Ada Reference Manual

2-12

Runtime Requirements

For some library functions to work properly, you must install and run

specific software components at program execution time. For example, if the

reader is using a communications port, you must load a protocol handler.

Because protocol handlers use a lot of memory, they are not automatically

loaded for you. Other functions require the Reader Wedge.

Protocol Handlers

You use the Intermec protocol handler (PHIMEC.EXE) when the reader is

connected with other Intermec devices. PHIMEC.EXE works with User-

Defined, Point-to-Point, Polling Mode D, and Multi-Drop protocols.

You use the PC standard protocol handler (PHPCSTD.EXE) when the

reader is connected to devices that use PC standard protocol.

PHPCSTD.EXE provides low-level communications abilities and protocol

services at the DOS level for non-communications software. It also provides

byte-by-byte transfer.

If your reader is a radio frequency (RF) unit, RFPH.EXE is automatically

loaded.

For more information on protocol handlers, refer to your JANUS user’s

manual.

To install a protocol handler

• From the DOS prompt, enter the following command:

handler n

where:

handler is either PHIMEC or PHPCSTD.

n is the number of the communications port.

When your application is finished, the protocol handler TSR continues to

run and can prevent other applications from running due to lack of

memory. You can unload the protocol handler TSR by adding the unload

command as the last line of the batch file that launches your application.