Intermec Janus 2020 User Manual page 532

JANUS 2020 Hand-Held Computer User's Manual
DLE
The ASCII Data Link Exception character. It causes the character that follows it
to be received as data, even if it is a protocol character. It allows for the use of
control characters in preambles, data strings, and configuration command
strings.
DOS code pages
A code page is a table that relates binary character codes used by a program to
keys on the keypad or to characters on the display. All international keypads
are translated using an installed DOS code page that contains the standard
ASCII character set and a set of national language characters specific to the
language the code page supports.
downline
When devices are connected to a computer, they are connected in a "line."
Downline is a direction relative to the computer. If more than one computer is
connected in a line, the upline computers usually handle data processing and
the downline computers usually handle data collection and sometimes some
data preprocessing. Contrast with upline.
DRAM
Abbreviation for dynamic random access memory. A type of RAM that stores
information in integrated circuits containing capacitors. Since capacitors lose
their charge over time, DRAM boards include logic to recharge, or "refresh,"
the RAM chips continuously. Since their internal circuitry is simple, DRAMs
are more commonly used than static RAMs, even though they are slower.
DRAM can hold approximately four times as much data as a static RAM chip
of the same complexity. The reader has 1MB of battery-backed DRAM.
drive
An electromechanical device that reads from and writes to disks. The three
types of common disk drives are floppy disk drives, hard disk drives, and PC
card drives.
driver
See device driver.
EAN
European Article Numbering. International standard bar code for retail food
packages corresponding to the Universal Product Code (UPC) in the United
States. 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.
G-10