HP Vectra VE5 2 Technical Reference Manual page 32

Load CMOS Memory
CMOS RAM Test
Internal Cache Memory Test
Initialize the Video
Test External Cache
Shadow SCSI ROM
8042 Self-Test
Timer 0/Timer 2 Test
DMA Subsystem Test
Interrupt Controller Test
Real-Time Clock 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 serial EEPROM and returns an error code if it has
been corrupted. Copies the contents of the EEPROM into
CMOS 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 internal level-one cache RAM. Test
failure causes an error code to display 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
Tests the level-two cache. A failure causes an error code to
display and disables the external cache.
Tests for the presence of HP SCSI ROMs. If SCSI ROMs are
detected, their contents are copied into the shadow RAM area.
A failure will cause an error code to display.
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.
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.