Verify Os Rom 3A-7; Tone Test 3A-7; Pokey - Atari CX 5200 Field Service Manual

VERIFY OS
ROM
•
Purpose:
To
test the
OS
ROM
(A8)
for
proper functioning.
•
Procedure: Press key
8
followed by
START.
•
Format:
If
error
code 30 appears on the Error
Summary
(Figure
3-1, pg.
3-8) the
OS
ROM
chip
is
defective.
Replace
the defective chip and
restart the
test.
No
Flowchart Entry
Point.
TONE
TEST
•
Purpose:
To check
the audio generation section
of
the
POKEY
(A7).
•
Procedure: Press key
6
followed by
START.
•
Format: The
screen
prints
at the
bottom: Register
^1 to
4)
? Press
key
1
followed by
START. A
series of
eight tones sounds on
each
register.
The
first
two
tones
may
be inaudible
but you can hear
the speaker
click.
Repeat
for registers
2,3,4.
Diagnostic
Flowchart Entry
Point: Pg.
4A-17.
CX5200
Field
Service
Manual
3A-7
Changed by
ECN
#0036
6/21/83