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4.
Press
[Select]
to select a test (that test will blink), then
press
[Start]
to begin. The test will begin and continue
runn i
ng
until you press
[Reset]
.
Note:
If you have a keyboard connected to your system ,
pressing
[Help]
while a test
is
running will redisplay the Self
Test menu.
As
long as you experience trouble-free operation with your
XE
, conducti
ng
the system diagnostics every few months
should
be
a sufficient checkup for your system.
Memory Test
The memory test checks
ROM
(Read Only Memory) and
RAM
(Random Access Memory).
ROM
is
nonerasable
memory
containing the computer's operating system,
ATARI
BASIC ,
and Missile Command.
RAM
is
temporary memory holding
the programs you write with
ATARI
BASIC or load from disk
or cassette.
The memory test works something
like a stoplight. When
ROM
is
tested, two bars appear on screen. If the bars turn
green,
ROM
is
working correctly. If the bars turn red ,
ROM
needs servicing .
HEHORV
TEST
RAH
1111111111111111
1111111111111111
1111111111111111
When
RAM
is
tested , 48 small squares appear, each represent-
i
ng
1 kilobyte of
RAM
. If a square turns green , that kilobyte
is
good . If a square turns red ,
RAM
needs servicing.
Note
: If you entered the Self Test program from
ATARI
BASIC ,
you will see 40 squares instead of 48 during the memory test.
ATARI
BASIC
is
using the other eight kilobytes of
RAM
.
16
22


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