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GLOSSARY
D
Data stream
Information transmitted between the
host system and the 5250 ALLY.
DB-25
A plug with 25 male or female pins.
Decimal
A base 10 numbering system.
Default
Formatting configurations that are
present and are used automatically
when no other information is available.
Delimit
To mark the beginning and end of a
character string.
Diagnostic
A routine designed to verify the
operation of a system and to find a
malfunction in a device.
DisplayWrite/400
An IBM word processing application
that supports bolding, underlining and
overstriking.
DPA
Display printer adapter.
DSC
Data stream compatible. A pre-SNA
protocol.
E
EBCDIC
Extended Binary Coded Decimal
Interchange Code. An eight bit
character code.
Emulation
A hardware or software product
imitating the function of another
hardware or software product.
EPROM
Erasable programmable read-only
memory. The storage medium for the
5250 ALLY firmware.
Esc
Escape control character. A non-graphic
(unimaged) code that signals the
transmission of control information to
the 5250 ALLY.
Extended ASCII
Some printer manufacturers have
implemented their own version of 8 bit
transmission. Extended ASCII allows
128 additional characters to be
displayed by the printer.
