Intermec Janus 2010 User Manual page 535

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Glossary
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nugget
helconital
TSR program
Terminate and stay resident program. A DOS program that remains loaded in
conventional memory after you have terminated it. You must explicitly unload
the TSR if you want to free the conventional memory it is using.
UART buffer
Universal Asynchronous Receiver/Transmitter buffer. The UART buffer
contains bytes of data being sent or received by the reader. The FIFO control
register controls how the UART buffer operates.
UPC/EAN Code
A fixed length, numeric, continuous bar code symbology that uses four
element widths. A reader that is configured to decode EAN bar codes can
decode UPC, but the reverse is not true. UPC code is a subset of EAN code. It is
a numeric, 12-digit bar code symbology used extensively in retail, particularly
the grocery industry. The character set is 0 to 9. Its maximum character density
is 13.8 numeric characters per inch.
upline
A device that is at the computer end of a connection between a computer and
a device is referred to as being upline. When devices are connected to a
computer, they are connected in a "line." Upline is a direction relative to the
device, in contrast to downline.
upper memory area
The area between the 640K and 1024K. The upper memory area is physically
composed of a 256K flash ROM chip (system flash) and the video memory
chip. Like a PC, this area contains the BIOS and video buffers. On the reader,
the upper memory area also contains PC card memory and ROM DOS. The
384K upper memory area maps just above 640K conventional memory.
User-Defined protocol
A custom communications protocol that can be modified to meet specific host
requirements. For example, you can configure User-Defined to act like a Point-
to-Point protocol, except that it requires an LRC and an acknowledgment from
the receiver. You can also define the communications characters such as SOM,
POL, or SEL, or disable these characters by setting them to null.
viewport
A method for viewing a full PC-size screen (25 x 80) with the reader's
16 x 20 display. You will only see 16 lines and 20 characters of data at one time.
Use the reader's display as a viewport to move around and see the entire
screen.
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