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JANUS? 2020 Hand-Held Computer (4MB) - Intermec

JANUS? 2020 Hand-Held Computer (4MB) - Intermec

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<strong>JANUS</strong> <strong>2020</strong> <strong>Hand</strong>-<strong>Held</strong> <strong>Computer</strong> User’s Manual (<strong>4MB</strong>)<br />

G-8<br />

cold boot<br />

One of two ways to boot the reader; compare to warm boot. A cold boot<br />

invokes the BIOS boot sequence, which verifies that the 256K flash system<br />

image is not corrupt, clears all memory, and performs a complete power-on<br />

self test (POST) to ensure that the hardware and peripherals are operational.<br />

The cold boot initializes the system hardware for use by system software, loads<br />

the default configuration, runs AUTOEXEC.BAT and CONFIG.SYS, and loads<br />

DOS. Because the physical RAM drive is initialized, all files on drive E are lost.<br />

You may cold boot the reader to clear the reader’s conventional memory, break<br />

out of an application that is locked in an infinite loop, or recover from an error<br />

condition.<br />

COM port<br />

Commonly used short form of communications port. Locations from which<br />

data can be passed into and out of the reader. COM ports offer serial<br />

communications, which means that data is transmitted one bit at a time over a<br />

single line from one computer to another.<br />

Communications Manager<br />

An application on the reader that lets you transmit and receive files, and see<br />

the status of the reader’s COM port. This application is available on the<br />

Application companion disk 3.<br />

communications protocol<br />

A set of rules or standards designed to enable computers to connect with each<br />

other and exchange data. An example of a communications protocol is<br />

Point-to-Point protocol.<br />

Communications Utilities<br />

Transmit and receive functions that you can call with PSK functions or<br />

software interrupts. Included in the Reader Services programs.<br />

Compound Function key<br />

The Compound Function key is a special key on the <strong>JANUS</strong> keypad. You use<br />

the key to access characters or perform functions that do not have an actual<br />

key on the keypad. When you press , the key is held in a buffer and the<br />

Compound Function key icon appears on the reader’s display. Once you press<br />

a key other than , the key combination is entered into the reader and the icon<br />

disappears from the display.<br />

configuration<br />

The selected parameters that determine the operating characteristics of an<br />

electronic device.

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