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Table 11-4
Inspection
2
test
flow
Test Description
Output
of Result
CENTRONICS CHECK
BOARD
LED PATERN
DISPLAY
OUT
SOUND OUT
STEP4
RAM
TEST
STEP PUSH
15)
Write, read,
and
verify
Now
testing
•
O
O O
0*0*
RAM
TEST
5-
80FFH
When
result
is
OK
O
•
0
O
0*0*
5- OK
When
result
is
NG
O
• •
•
0*0*
5
— NG
BEEP
(61
Write, read,
and
verify
STEP
PUSH
addresses
C000
thru
Now
testing
•
0 o o
o
• •
o
6-
When
result
is
OK
0*00
o
• •
o
6
-OK
When
result
is
NG
o
• •
•
o
• •
o
6-
NG
BEEP
When
result
is
NG
in
both
tests (5)
and
(6)
CAN
T
CONTINUE
Continuous
beep
17)
Write,
read,
and
verify
STEP
PUSH
addresses
8100
thru
Now
testing
•
O
0
O
o •
•
•
8100H—BFFFH.
When
result
is
OK
O •
O O
(Write data)
-
O •
• •
—
00
-
OK
55
-
OK
(NG
address)
AA
-
OK
1
(Read
data)
FF
- OK
1
1
00
-
NG
8100-7E
BEEP
When
result
is
NG
0 • • •
O
• •
•
55
-NG
8100-7E
AA-NG
8100-7E
BEEP
BEEP
FF
- NG
8100-7E
BEEP
(8)
Write, read,
and
verify
STEP
PUSH
addresses
C100
thru
Now
testing
•
o
o o
•
o
o
o
C100H-FFFFH
00
-OK
When
result
is
OK
0*00
•
o
o
o
55
-OK
AA
-
OK
FF-OK
00
-NG
C100-7E
BEEP
When
result
is
NG
o
• • •
•
0
O
0
55
-NG
C100-7E
AA
- NG
C100
-
7E
BEEP
BEEP
FF-NG
C100-7E
BEEP
STEP5 V
RAM
TEST
STEP
PUSH
(9)
Write, read,
and
verify
Now
testing
•
o
o
o
•
o o
•
Change
in
screen display
V
RAM
addresses
0000
thru
3FFFH
When
result
is
OK
o
•
o
o
• o
o
•
VRAM
55
-
OK
AA-OK
When
result
is
NG
0
• • ®
• o
o
•
VRAM
55- NG
BEEP
STEP6
ROM
TEST
STEP
PUSH
(10)
Verify
P-BASIC
ROM
data
check
sum
Now
testing
•
o
o o
•
0*0
ROM
TEST
P-BASIC
When
result
is
OK
0
•
o
o
• O
• 0
VERIFY - OK
CHECKSUM
-
OK
•
•
•
VERIFY- NG
BEEP
•
0*0
CHECKSUM
-
NG
BEEP
(11)
Verify
MSX-
STEP
PUSH
BASIC
ROM
data
Now
testing
•
o o o
o o o o
P-BASIC
When
result
is
OK
0*00
•
o
•
•
VERIFY
-OK
CHECKSUM
-OK
When
result
is
NG
o
•
• •
• 0 •
•
VERIFY - NG
CHECKSUM
-
NG
BEEP
BEEP
END
END
Press
STEP
button
to return to
STEP
1.
67
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