HP Vectra XW Technical Reference Manual page 54

5 Power-On Self-Test and Error Messages
Order in Which the Tests are Performed
DMA Subsystem Test
Interrupt Controller Test
Real-Time Clock Test
Audio Test
RAM Address Line
Independence Test
Size Extended Memory
Real-Mode Memory Test
(First 640KB)
Shadow RAM Test
Protected Mode RAM Test
(Extended RAM)
Keyboard Test
Mouse Test
LAN Test
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Checks the DMA controller registers. Test failure causes an error code to
display.
Tests the Interrupt masks, the master controller interrupt path (by forcing
an IRQ0), and the industry-standard slave controller (by forcing an IRQ8).
Test failure causes an error code to display.
Checks the real-time clock registers and performs a test that ensures that
the clock is running. Test failure causes an error code to display.
Tests that a SoundBlaster chip is present, and invokes a built-in self-test.
Test failure causes an error code to display.
Memory Tests
Verifies the address independence of real-mode RAM (no address lines
stuck together). Test failure causes an error code to display.
Sizes and clears the protected mode (extended) memory and writes the
value into CMOS bytes 30h and 31h. If the system fails to switch to
protected mode, an error code is displayed.
Read/write test on real-mode RAM. (This test is not done during a reset
using and
system RAM to determine how much is present. Test failure of a 64 KB
block of memory causes an error code to display, and the test is aborted.
Tests shadow RAM in 64 KB segments (except for segments beginning at
A000h, B000h, and F000h). If they are not being used, segments C000h,
D000h and E000h are tested. Test failure causes an error code to display.
Tests protected RAM in 64 KB segments above 1 MB. (This test is not
done during a reset using
causes an error code to display.
Keyboard / Mouse Tests
Invokes a built-in keyboard self-test of the keyboard's microprocessor and
tests for the presence of a keyboard and for stuck keyboard keys. Test
failure causes an error code to display.
If a mouse is present, invokes a built-in mouse self-test of the mouse's
microprocessor and for stuck mouse buttons. Test failure causes an error
code to display.
If the HP PCI Integrated 10/100 Interface is present, invokes a built-in self-
test. Test failure causes an error code to display.
). The test checks each block of
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and ). Test failure
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