Subtests
The 11 subtests in the System Set test group confirm the following computer functions:
CMOS Confidence Test
Checks the nonvolatile RAM (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 Speaker Test
Checks the functionality of the speaker by generating eight tones.
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 controller sends the correct memory
addresses to the microprocessor.
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.
PC Card Controller Test
Checks the functionality of the PC Card controller on the system board.
USB Register Test
Checks the integrated registers of the Universal Serial Bus (USB) interface. This subtest does not test
USB peripherals.
USB Memory Structure Test
Monitors the ability of a USB controller to process a simple set of memory-resident instructions.
Summary of Contents for Latitude CPi A-Series
Page 56: ...Back to Contents Page ...
