Appendix
Service
Video Controller Board
MAIN Board)
Table A-2. CNI, 2 Pin Assignments
Pin No.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
Signal Name
Vcc
NC
MAO
MAlO
NC
NC
NC
I/o
—
—
o
0
0
0
0
0
0
0
I/o
I/o
o
—
—
o
0
0
0
—
—
—
—
—
o
0
0
0
0
0
—
o
—
Description
Ground
Data bus bit O
Data bus bit 16
Data bus bit 1
Data bus bit 17
Data bus bit 2
Data bus bit 18
Data bus bit 3
Data bus bit 19
+5
Not connected
Memory address bit O
Memory address bit
Memory address bit
2
Memory address bit 3
Memory address bit 4
Memory address bit 5
Memory address bit 6
Memory address 10
Date bus bit 4
Data bus bit 20
Data bus bit 5
Data bus bit 21
Data bus bit 6
Data bus bit 22
Data bus bit 7
Data bus bit 23
Memory address bit 7
Not connected
+5
Memory address bit 8
Memory address bit 9
3
2
Not used
Not
Not
Not
Ground
O
2
3
1
O
1
Not connected
Write enable
Not connected
Data bus bit 8
Rev. A
