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Running the Tests
The table below lists all of the available System diagnostic tests
and refers you to other sections in this chapter for additional
information, if necessary.
System diagnostic tests
Component Tests
function
System Basic functionality
Tests components such as
board
instructions, registers, and
flags of CPU
CPU protected mode
Tests protected mode
instructions such
as
LSL,
VERR, and LAR
Processor speed
Identifies current clock speed
Coprocessor
Tests the coprocessor
DMA controller Tests memory address and
page registers of DMA
controllers 1 and 2
Interrupt controller
Tests interrupt mask registers
Timer
Compares timer count to RTC
Real time clock
Compares RTC to time 0
interrupt
CMOS validity
Tests the CMOS RAM
Memory
See “Memory Diagnostics”
BIOS ROM
Tests data path of BIOS ROM
Parity
Checks for memory parity
errors .
Pattern
Tests for memory read/write
faults
Walking 1
Checks data lines for shorts
and bits that are 1
Walking 0
Checks data lines for shorts
and bits that are 0
Address
Checks for address line
shorts
Refresh
Checks the refresh interval
C-IO
Performing System Diagnostics