User Guide Desktop PC Equity 386SX/16 PLUS

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-10
Performing System Diagnostics