Intermec Janus 2050 User Manual page 393

JANUS 2050 Vehicle-Mount Computer User's Manual (4MB)
FIFO control register (FCR)
First in/first out control register. The FCR contains a hex value that controls
how the UART buffer operates. You may need to configure the JANUS to
restore a hex value for the FCR in case you turn off the device while running a
communications application that uses UART 16x550 mode.
fixed length
Characteristic of a bar code symbology in which the number of characters per
symbol is predetermined. Opposite of variable length.
flash PC card
A type of memory PC card that provides additional disk storage space, not
more executable conventional memory, on the device. Flash cards retain their
data without the use of a backup battery.
flash ROM drive
Drives C and D on the device are ROM drives that are implemented in flash
memory. Flash ROM drives are upgradeable, but have limited write capability.
Both drives use a file allocation table (FAT) type format.
flow control
A method for controlling the flow of data between the device and the serial
port. It stops the transmitting device from sending data when the receiving
device buffer fills up and starts it again when the buffer empties. Flow control
can be done through software (XON/XOFF) or hardware (CTS/RTS).
full ASCII
An operating mode that sets the device to properly decode Code 39 or
Code 93 labels containing data that includes any of the 128 ASCII characters.
Graphics mode
One of two display modes on the device. When the device is set to use
Graphics mode, you see a 128 x 160 pixel display size. You can use the CGA
display as a viewport to move around and see a 200 x 640 pixel virtual display.
Contrast with Text mode.
handshake event
A communications event that signifies the completion of a data block
transmission. The exchange signifies either an affirmative acknowledge (AFF)
or a negative acknowledge (NEG). The handshake event is enabled by defining
the AFF character to be other than NULL. Some computers use the characters
XON and XOFF as handshaking characters.
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