Users Guide

Subtests
The subtests that constitute the System Set test group and the computer functions they confirm follow:
CMOS Confidence Test
Checks the NVRAM for accessibility and reliability of data storage by performing a data pattern check and
verifying the uniqueness of memory addresses.
DMA Controller Test
Tests the direct memory access (DMA) controller and verifies the correct operation of its page and channel
registers by writing patterns to the registers.
Real-Time Clock Test
Confirms the functionality and accuracy of the computer's real-time clock (RTC).
System Timers Test
Checks the timers used by the microprocessor for event counting, frequency generation, and other
functions. Only the functions that can be activated by software are tested.
Interrupt Controller Test
Generates an interrupt on each interrupt request (IRQ) line to verify that devices using that line can
communicate with the microprocessor and that the interrupt controllers send the correct memory addresses
to the microprocessor.
APIC Test
Tests that the procedure used to boot a multiprocessor system is able to properly receive interrupts from the
input/output (I/O) Advanced Peripheral Interrupt Controller (APIC).
APIC MP Test
Ensures that all microprocessors are able to properly receive interrupts from the I/O APIC.
System Speaker Test
Checks the functionality of the speaker by generating eight tones.
Coprocessor Calculation Test
Checks the use of different types of numbers and the math coprocessor's ability to calculate correctly.
Coprocessor Error Exception Test
Verifies the math coprocessor's ability to handle errors and to send IRQs to the microprocessor.
Multiprocessor Test
For systems with multiprocessors, confirms that the secondary microprocessor is operational.
Why Run a System Set Test?