Ten-Tec RX-340 Technical Manual page 86

PARALLEL OUTPUT BIT POSITIONS
RX-340 SERIAL/PARALLEL INTERFACE
NOTE:
5-16
1) U/L & I/A flags may be forced to logic 0 via software
command.
Serial & parallel data outputs may be disabled at DB-25
2)
connector by software command. RS-232 will remain active
FIGURE 5-3