IBM xSeries 380, Hardware Maintenance Manual

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Diagnostics
21
The Expected speed is taken from the SMBIOS information in the computer.
Set the test parameters: Choose YES for the CPU Speed Comparison, Expected CPU
Speed, and Run Test parameters.
CPU Mode Switching Test: This test tests the ability of the processor to switch
between 64bit and 32bit processor modes.
CPU Compatibility Test: This test tests the ability of the processor to run legacy 32bit
code. This is very important because the computer’s BIOS runs in this compatibility
environment.
Coprocessor Test: This test checks the functionality of the math coprocessor. Select
Coprocessor Test from the System menu and press <Enter>. This test loads and stores
the control and status word, checks data transfer between the CPU and the math
coprocessor, and tests exception checking while the data transfer is in progress.
DMA controller test
This test is a series of read and write tests on the memory address registers and page
registers of DMA controllers 1 and 2. The DMA (Direct Memory Access) controller
manages the flow of information directly to and from system memory and an
"intelligent" peripheral device, without passing through the CPU. On error, AMIDiag
displays the register number, data written, and data read. To perform this test, select
DMA Controller Test from the System menu and press <Enter>.
Interrupt controller test
The Interrupt Controller Test performs a series of read and write tests on interrupt
mask registers and checks for stray interrupts after masking off all interrupts.
AMIDiag displays the register numbers, the data read, and the data written if there
are errors in the read/write test. Select Interrupt Controller Test from the System
menu and press <Enter>.
Timer test
This test checks the accuracy of the timer count by calibrating it against the periodic
interrupt of the Real Time Clock (RTC). Select Timer Test from the System menu and
press <Enter>.
Real time clock test
This test checks the regularity of the real time clock interrupt by calibrating it against
the timer 0 interrupt. On some systems, this test resets the date and time function.
Always verify the correct date and time after exiting AMIDiag. To perform this test,
select Real Time Clock Test from the System menu and press <Enter>.
CMOS validity test
This test checks the validity of the data in CMOS RAM and makes sure that the CMOS
RAM checksums are correct. This test also makes sure that the battery is in good
condition. Select CMOS Validity Test from the System menu and press <Enter>.