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Running the tests, C-10 – Epson Equity 286 PLUS User Manual

Page 204

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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