NEC Express5800/320Ma User Manual page 87

D703
Test the PIIX PM register.
D704
Test the PCI bus.
D720
Test the timers.
D721
Test the real-time clock.
D722
Test the real-time clock crystal.
D730
Test direct memory access to the serial I/O port.
D740
Test the loopback interface to the serial I/O port.
D741
Test the SIO (super input-output) loopback from COM2.
D745
Test the SIO (super input-output) interface to the LPC (low-pin count) bus.
D750
Test the ISA bus.
D801
Test the PCI interface to the Ethernet port.
D802
On the primary I/O element, initiate the Ethernet port self-test.
D803
On the primary I/O element, initiate the Ethernet parity error test.
D804
On the primary I/O element, initiate the Ethernet loopback test.
Online Diagnostic Test Codes
POST and Online Diagnostic Codes A-25