96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
SD0
SD1
SD2
SD3
SD4
SD5
SD6
SD7
SD8
SD9
SD10
SD11
SD12
SD13
SD14
SD15
P1
2
3
4
6
8
SDO
SDI
ISPEN
MODE
SCLK
SDO
SDI
ISPEN
MODE
SCLK
E59
69
70
71
73
74
75
77
78
79
80
102
106
97
SA9
SA8
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0
IOR
IOW
CLK8
P1
23
48
52
56
60
64
IRQ CG
+5V
+5V
+5V
+5V
+5V
P2
100
104
108
112
116
120
+5V
+5V
+5V
+5V
+5V
+5V
P1
4
SF2
SF1
2
138
137
134
133
130
129
126
125
122
121
118
117
114
113
110
109
Y0R
Y1R
Y2R
Y3R
Y4R
Y5R
Y6R
Y7R
C0R
C1R
C2R
C3R
C4R
C5R
C6R
C7R
P1
Y0C
Y1C
Y2C
Y3C
Y4C
Y5C
Y6C
Y7C
C0C
C1C
C2C
C3C
C4C
C5C
C6C
C7C
KEY0
KEY1
KEY2
KEY3
KEY4
KEY5
KEY6
KEY7
P2
54
53
50
49
46
45
42
41
22
21
18
17
14
13
10
9
8
7
6
5
4
3
2
1
38
37
34
33
30
46
47
43
107
103
105
101
99
Y2
Y8
Y7
Y3
Y4-Y6
A2
A8
A7
A3
A4-A6
DT0
DT1
DT2
DT3
DT4
STBCG
ADD1
ADD2
VP
HS
CLK14
CLK28
HD
P1
37,185,186
188-190
202,203
D0
|
D7
CK
Q0
|
Q7
OE
U46,U49
D-FFs
12-19
2-9
11
1
SD0-15
LAD0-15
D0
|
D7
CK
Q0
|
Q7
OE
U52,U55
D-FFs
12-19
2-9
11
1
SD0-15
LAD16-31
LAD0-31
LAD25,LAD28-31
LAD0-31
U62
GRAPHIC SYSTEM PROCESSOR
U501
CBAH
D0
|
D7
CK
Q0
|
Q7
OE
U53,U56
D-FFs
2-9
12-19
11
1
LAD16-31
SD0-15
U65
Q0
|
Q7
OE
D0
|
D7
CK
U47,U50
D-FFs
2-9
12-19
11
1
SD0-15
LAD0-15
HA16-31
HBS0-3
HA5-15
CBAL
D0
|
D7
CK
Q0
|
Q7
U48,U51
D-FFs
D0
|
D7
CK
Q0
|
Q7
U54,U57
D-FFs
A1
A2
OE
Y1
Y2
U89
BUS BUFFER
2
5
1,4
3 SD6
6 SD7
HCS
GSPRT
MAPH
MAPL
VER
A1
|
A9
IOW/IOR
U600
DEC CG/GSP RW
22
21
10
11
33
34-38,41-44
16
GABL
GABH
15
14
12-19
12-19
2-9
2-9
SD1-15
SD0-15
11
2-9
D0
|
D7
CK
Q0
|
Q7
G
U510
D-FFs
12-19
D0
|
D7
CK
Q0
|
Q7
G
U507
D-FFs
1
12-19
D0
|
D7
CK
Q0
|
Q7
G
U504
D-FFs
2-9
11
12-19
1
DAT0-4
ST
ADR0,1
NTSC
U613 G/A
U103-U105
BUS BUFFERS
U45
BUS BUFFER
Y0-7
C0-7
A0-7
158-164
167-175
191-198
132
1-4,10-13
114
53,106
54,105
55
56
28
145
OUT
RCK
WCK
+5V
+5V
U44
VOLTAGE
DETECTOR
U35-U42
LINE MEMORIES
U24,U28,U32
LATCH
U84,U86
U23,U27,U31
SRAMs
N
N-1
(A)
N
N-1
(Y)
N
N-1
(U)
N
N-1
(V)
AY
AY
AY
A
I/O
A
I/O
A
I/O
PLTL
RST
VP
180
115
118
24
VP
HS
OET
PLTW
WE
1
27
(Y)
(U)
(V)
A
A
A
OE
I
Y
Y
Y
U22,U26,U30
LATCH
D
D
D
D
CK
Q
Q
Q
Q
OE
U21,U25
U29,U34
D-FFs
OE
22
PLTL
1
D0-31
A0-8
WE
RAS0-3
CAS1-3
T/O
E
SC0-3
SE0-3
SD0-7
YD0-7
UD0-7
WVD0-7
U2-U4,U6-U20
U91-U96
VRAMs
A0-9
WE
RAS4
CAS0-3
LAD0-31
U511,U512
DRAMs
DIR
B
A
1
DIR245
U99-U102
TRANSCEIVERS
A
Y
A
Y
U106,U107
BUS BUFFERS
67-74
107-109
123-127
91-94
97-100
75,76
81-86
14-21
57-61
64-66
39-42
47-50
29-36
2
4
U33
LAD0-7
A0-9
1
2
4
U66
U67
2
1
3
U98
29
64
65-68,77
79-81
90,91
HA5-31
HBS0-3
16,45-47
57-62,69-73
83-87,94-99
117-119,120,121
44
21
HCS
RESET
24
6
37
15
17
HOE
HDST
HRDY
HREAD
HWRIT
E
7
104
42
SCLK
WE
2,3,27,33
CAS0-3
TP/
OE
RCA2-11
VCK
53
HSYNC
HSYNC
ROLL
TRA
TRB
DLY
CAPB
AB
CAPT
CVCLK
CUCLK
VCK
43
4
2
24
X1
U63
U64
CLK
IN
20
55
PGMD
CAMD
VSYNC
19
4
38
CLK2
CLK1
8
LAD0-31
92,93,103,105,108-113,115
123-125,127,129-131,133,134
136-139,141-148
HIN
T
RAS
30
ALTCH
(A)
(A)
(Y)
(U)
(V)
1
1
11
2-9
11
11
(V)
(Y)
(U)
3
11
24
1
11
2-9
D0
|
D7
CK
Q0
|
Q7
G
U509
D-FFs
12-19
1
11
2-9
D0
|
D7
CK
Q0
|
Q7
G
U508
D-FFs
12-19
1
11
2-9
D0
|
D7
CK
Q0
|
Q7
G
U506
D-FFs
12-19
1
11
2-9
D0
|
D7
CK
Q0
|
Q7
G
U503
D-FFs
12-19
1
11
2-9
D0
|
D7
CK
Q0
|
Q7
G
U505
D-FFs
12-19
1
LAD8-31
CG BOARD
BLOCK DIAGRAM OF CG BOARD
+5V
31
32
5
IOR
IOW
CLK8
READ
WRITE
RST
RST
20
19
+5VB
+5V
23
SDO
SDI
ISPEN
MODE
SCLK
(SDO)
(SDI)
(ISPEN)
(MODE)
(SCLK)
8
7
30
27
18
SC0-3
SE0-3
AD0-7
YD0-7
UD0-7
VD0-7
AN0-7
YN0-7
UN0-7
VN0-7
WE1,2
RSTW1,2
RE
RSTR
178
201
146
177
179
204
151
152
113
AY
1
2
3
4
DATA
DCLK
OE
NCS
CN51
CLK27
CLK27
HD
CLK
DATAO
DCLK
STATUS
CONFDONE
181
184
80
150
17
11
12
16
13-15
3
9
8
4
5-7
RST
YCK
8
17
SDO
SDI
ISPEN
MODE
SCLK
(SDO)
(SDI)
(ISPEN)
(MODE)
(SCLK)
(SDO)
(SDI)
(ISPEN)
(MODE)
(SCLK)
1,2
34-38
41-44
18
8
7
30
27
U502
SDO
SDI
ISPEN
MODE
SCLK
18
8
7
30
27
A0-A5
A14,A25
A28-A31
4
5
3
22
12-16
11
25
CAMD
CK27
CK27
VPCI
ALTCH
DDIN
RAS0-RAS4
DIR245
RAS
VP
VP
RST
RST
NTSC
REFRESH
REFRESH
A25
A28-31
24
33
RST
RST
PLTL
PLTL
PLTW
NC
PLTW
33
22
21
19
26
9
12
+5V
34-38
23
TRA
TRB
DLY
TRA
TRB
DLY
21
20
19
24
23
26
CAPB
AB
CAPL
CAPB
AB
CAPT
RAS
ROLL
ALTCH
11
25
5
A
Y
U97,U98
BUS BUFFERS
142
CBAL
CBAH
13
12
HOE
HDST
HRDY
25
24
26
CLK1
CLK2
3
4
To
Mother
Board
To
Mother
Board
To
Mother
Board
To
Mother
Board
To
Mother
Board
To
Mother
Board
To
Mother
Board
– 20 –