Epson EQUITY 386SX/16 PLUS - Manual (Page 198)

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