HP Vectra VT 6/xxx HP Vectra XU 6/xxx and VT 6/xxx PCs - Technical Reference M - Page 43

Tests protected RAM in 64 KB segments above 1 MB.

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CMOS RAM Test CPU Cache Memory Test Initialize the Video 8042 Self-Test Timer 0/Timer 2 Test 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) Checks the CMOS RAM for start-up power loss, verifies the CMOS RAM checksum(s). Test failure causes error codes to display. Tests the processor's cache memories. Test failure causes an error code to be displayed and the boot process to abort. Video Tests Initializes the video subsystem, tests the video shadow RAM, and, if required, shadows the video BIOS. A failure causes an error code to display, but the boot process continues. System Board Tests Downloads the 8042 and invokes the 8042 internal self-test. A failure causes an error code to display. Tests Timer 0 and Timer 2. Test failure causes an error code to display. 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 builtin 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 [CTRL] [ALT] and [DELETE]). The test checks each block of 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 [CTRL] [ALT] and [DELETE]). Test failure causes an error code to display.

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CMOS RAM Test
Checks the CMOS RAM for start-up power loss, verifies the
CMOS RAM checksum(s). Test failure causes error codes to
display.
CPU Cache Memory Test
Tests the processor’s cache memories. Test failure causes an
error code to be displayed and the boot process to abort.
Video Tests
Initialize the Video
Initializes the video subsystem, tests the video shadow RAM,
and, if required, shadows the video BIOS. A failure causes an
error code to display, but the boot process continues.
System Board Tests
8042 Self-Test
Downloads the 8042 and invokes the 8042 internal self-test. A
failure causes an error code to display.
Timer 0/Timer 2 Test
Tests Timer 0 and Timer 2. Test failure causes an error code to
display.
DMA Subsystem Test
Checks the DMA controller registers. Test failure causes an
error code to display.
Interrupt Controller Test
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.
Real-Time Clock Test
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.
Audio Test
Tests that a SoundBlaster chip is present, and invokes a built-
in self-test. Test failure causes an error code to display.
Memory Tests
RAM Address Line
Independence Test
Verifies the address independence of real-mode RAM (no
address lines stuck together). Test failure causes an error code
to display.
Size Extended Memory
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.
Real-Mode Memory Test
(First 640KB)
Read/write test on real-mode RAM. (This test is
not
done
during a reset using [CTRL] [ALT] and [DELETE]). The test
checks each block of 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.
Shadow RAM Test
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.
Protected Mode RAM Test
(Extended RAM)
Tests protected RAM in 64 KB segments (above 1 MB). (This
test is
not
done during a reset using [CTRL] [ALT] and
[DELETE]). Test failure causes an error code to display.