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8
7
A[0.. 29]
A[0..29]
U 21
A10
2
1A
A11
3
1B
D
A2
5
2A
A12
6
2B
A3
11
3A
A13
10
3B
A4
14
4A
A14
13
4B
1
MUXSEL
A/B
15
G
74F157
U 22
A5
2
1A
A15
3
1B
A6
5
2A
A16
6
2B
A7
11
3A
A17
10
3B
A8
14
4A
A18
13
4B
ICT
1
A/B
T308
15
C
G
74F157
R177
75
U 23
A9
2
1A
A19
3
1B
A20
5
2A
A21
6
2B
A23
11
3A
A22
10
3B
A24
14
4A
A25
13
4B
1
A/B
15
G
74F157
D[0..15]
D[0..15]
U 24
D 0
18
2
B1
A1
D 1
17
3
B
B2
A2
D 2
16
4
B3
A3
D 3
15
5
B4
A4
D 4
14
6
B5
A5
D 5
13
7
B6
A6
D 6
12
8
B7
A7
D 7
11
9
B8
A8
20
19
+5V
VCC
G
10
1
GND
DR
C 4 5
0.1uF
74F245
U 25
D 8
18
2
B1
A1
D 9
17
3
B2
A2
D 10
16
4
B3
A3
D 11
15
5
B4
A4
D 12
14
6
B5
A5
D 13
13
7
B6
A6
D 14
12
8
B7
A7
D 15
11
9
B8
A8
A
20
19
+5V
VCC
G
10
1
GND
DR
C 46
74F245
0.1uF
R W *
DRAMOE*
8
7
6
+5V
MA[0..11]
C 42
0.1uF
R 20
0
T167
MA0
4
1Y
R 18
0
T168
MA1
7
2Y
R 17
0
T169
MA2
9
3Y
R 19
0
T170
MA3
12
4Y
+5V
C 44
0.1uF
R 24
0
MA4
4
T171
1Y
R 22
0
T172
MA5
7
2Y
R 21
0
T173
MA6
9
3Y
R 23
0
T174
MA7
12
4Y
+5V
C 43
0.1uF
R 27
0
T175
MA8
4
1Y
R 26
0
T176
MA9
7
2Y
R 25
0
T177
M A10
9
3Y
0
R 28
T178
M A11
12
4Y
R 158
75
MD0
R 157
75
MD1
R 167
75
MD2
MD3
R 168
75
MD4
R 169
75
MD5
R 170
75
MD6
R 171
75
MD7
R 172
75
MD8
R 159
75
MD9
R 160
75
MD 10
R 161
75
MD 11
R 162
75
MD 12
R 163
75
MD 13
R 164
75
MD 14
MD[0. .15]
R 165
75
MD[0. .15]
R 166
75
MD 15
6
5
4
+5V
MA[0..11]
44
S1RAS0*
RAS0
34
S1RAS2*
RAS2
45
S1RAS1*
RAS1
33
S1RAS3*
RAS3
43
BCAS0*
CAS0
40
BCAS1*
CAS1
42
BCAS2*
CAS2
41
BCAS3*
CAS3
47
B W E*
WE
+5V
44
S2RAS0*
RAS0
34
S2RAS2*
RAS2
45
S2RAS1*
RAS1
33
S2RAS3*
RAS3
43
CAS0
40
CAS1
42
CAS2
41
CAS3
47
WE
A[0.. 29]
A0
A1
A26
A27
A28
A29
5
4
3
2
C 82
10uF
10V
U 26
SIMM72
PRD1
PRD2
PRD3
PRD4
C 81
10uF
10V
U 27
SIMM72
PRD1
PRD2
PRD3
PRD4
ENCAD, Incorporated
Title
Enhanced Main Board (SIMM.sch)
Size
Document Number
B
205325
Date:
Monday, November 04, 2002
3
2
1
+5V
R 30
R 31
10K
10K
D
67
P D 1
68
P D 2
69
70
4 0DEG
C
+5V
R 33
R 34
10K
10K
67
P D 5
68
P D 6
69
70
B
A
R e v
F
Sheet
6
o f
9
1
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