Asus M4A89GTD PRO Supplementary Manual page 22

Parallel Port
Note: This is an auto test.
Parallel Port Test items:

TFIFO Mode Test
After setting the Parallel Port to the TFIFO mode, tests the stability of its data
transmission.
Note: This test is only for a Parallel Port supporting the ECP mode. If the current
Parallel Port does not support the ECP mode, the result of this test shows Not Tested.
Note: If the current Parallel Port is in use, it can not be tested. Please remove the device from
the Parallel Port before testing.
CMOS
Note: This is an auto test.
CMOS Test items:

CMOS Mode Test
Tests if the CMOS space is valid through the read/write parameters 0x55/0xAA.
RTC
Note: This is an auto test.
RTC Test items:

RTC Accuracy Test
Tests whether the RTC is accurate.
USB