Intel SYSTEM 310 Configuration Manual page 31

056 Board Jumpers
System 310
IN ERRUP
JUMPERS
The interrupt request jumpers, when connected, permit a parity error
detected by the 056 board to interrupt the CPU. Since no software
drivers are provided for this feature in the System 310, you must
either write this software yourself or remove the default jumper
connecting E123 and E127. Figure 4-4 shows where this jumper is
located.
4-6