Epson 386/33 PLUS Manuel D’Utilisation

The table below lists all of the available System diagnostic tests

and may refer you to other sections in this chapter for

additional information.

System board

Basic functionality

Tests components such as

Instructions, registers, and

flags of CPU

CPU protected mode

Tests protected mode

instructions such as LSL, VERR,

and LAR

Memory

Processor speed

Coprocessor

DMA controller

Interrupt controller

Timer

Real-time clock

CMOS validity

BIOS ROM

Parity

Identifies current clock speed

Tests the coprocessor

Tests memory address and

page registers of DMA

controllers 1 and 2

Tests interrupt mask registers

Compares timer count to RTC

Compares RTC to time 0

interrupt

Tests the CMOS RAM

See ‘Memory Diagnostics”

Tests data path of BIOS ROM

Checks for memory parity

errors

Pattern

Walking 1

Tests for memory read/write

faults

Checks data lines for shorts

and bits that are 1