Test
Description
System BIOS Tests
LED Test
Tests the LEDs on the control panel.
Processor Test
Tests the processor’s registers. Test failure causes the boot process
to abort.
System (BIOS) ROM Test
Calculates an 8-bit checksum. Test failure causes the boot process
to abort.
RAM Refresh Timer Test
Tests the RAM refresh timer circuitry. Test failure causes the boot
process to abort.
Interrupt RAM Test
Checks the first 64 KB of system RAM used to store data
corresponding to various system interrupt vector addresses. Test
failures cause the boot process to abort.
Shadow the System ROM
BIOS
Tests the system ROM BIOS and shadows it. Failure to shadow the
ROM BIOS will cause an error code to display. The boot process will
continue, but the system will execute from ROM. This test is not
performed after a soft reset (using
[CTRL] [ALT] and [DELETE]
).
Load CMOS Memory
Checks the serial EEPROM and returns an error code if it has been
corrupted. Copies the contents of the EEPROM into CMOS RAM.
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.
Internal Cache Memory
Test
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
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
Test External Cache
Tests the level-two cache. A failure causes an error code to display
and disables the external cache.
Shadow SCSI ROM
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.
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.
