Specifications

555
Appendices
Communicating with I/Os
Statements
OUT
Sends a data byte to an output port.
POWER
Controls the automatic power-off facility.
WAIT
Pauses program execution until a designated input
port presents a given bit pattern.
Functions
FRE
Returns the number of bytes available in a speci-
fied area of the memory.
INP
Returns a byte read from a specified input port.
Communicating with the barcode device
Statements
CLOSE
Closes file(s).
INPUT#
Reads data from a device I/O file into specified
variables.
OPEN "BAR:"
Opens the bar code device file. This statement
also activates or deactivates the indicator LED and
the beeper (vibrator) individually.
Functions
CHKDGT$
Returns a check digit of bar code data.
EOF
Tests whether the end of a device I/O file has been
reached.
INPUT$
Returns a specified number of characters read
from the keyboard or from a device file.
LOC
Returns the current position within a specified file.
MARK$
Returns the bar code type and the number of digits
of a bar code. In the BHT-100Q, this function
returns also the 2D code type and the number of
digits of a 2D code.