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+5V
+5V
1
2
J54
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
J42
NOT USED
FA0
+5V
SA0
1
SA1
2
SA2
3
SA3
4
SA4
5
SA5
6
SA6
7
SA7
8
SA8
9
SA9
10
GND
50
GND
54
GND
57
GND
60
GND
67
GND
68
SD0
12
SD1
13
SD2
14
SD3
15
SD4
18
SD5
19
SD6
20
SD7
21
RWC
58
AEN
11
DRQ
23
IRQ
26
RESET
22
IOW
24
IOR
25
DACK
27
TC
28
INDEX
62
CS
30
ADDSL
29
I0
42
I1
41
I2
40
I3
39
I4
38
I5
37
I6
36
I7
35
XTAL1
33
XTAL2
34
MO0
49
DS1
51
DS0
52
MO1
48
DIR
55
STEP
61
WD
59
WE
53
TRAK0
63
WP
64
RDATA
65
HEAD
56
DSKCHG
66
MO2
44
DS3
46
DS2
47
MO3
43
VCC
17
VCC
32
GND
16
GND
31
GND
45
U105
3201PLCC
1
2
3
4
5
6
R62
10K
FA[0..17]
FA[0..17]
G17
+5V
+5VA
C118
.1UF
C17
10UF
E8
DB[0..31]
DB[0..31]
DB24
DB25
E1
1
C53
.01UF
VREFA
4
VREFB
18
D0
14
D1
13
D2
12
D3
11
D4
10
D5
9
D6
8
D7
7
WR
16
CS
15
A/B
6
RFBA
3
OUTA
2
AGND
1
RFBB
19
OUTB
20
VDD
17
DGND
5
U28
AD7528
DAC0_IREF
+15V
2
3
1
8
4
U4A
MC34002
Q3
CR5
3 4
U115B
74F04
5
6
U115C
74F04
(DACK)1
FP_RST
FL_IRQ
(DREQ)1
FD[0..15]
FD[0..15]
B17
B47
B47
G4
H3
G4
G4
7
FA1
FA2
FA3
FA4
FA5
FA6
FA7
FA8
FA9
FD8
FD9
FD10
FD11
FD12
FD13
FD14
FD15
FP_RST
AEN
DRQ
FL_IRQ
DIR
HD
(MOT_ON)
(STEP)
(WDATA)
(WG)
(TR0)
(WP)
(RDATA)
(DSKCHG)
(INDEX)
(READY)
+5V
+5V
+5V
J42
TO
FLOPPY
DRIVE
CONNECTS
(SIDE1)
+5V
I0
I1
I2
I3
I4
I5
I6
I7
FL_IRQ
1
2
3
4
5
6
7
8
9
10
11
12
J40
FOR
TEST
ONLY
I0
I1
I2
I3
I4
I5
I6
I7
(DACK)1
(IOW)
(IOR)
TC
+5V
9 8
U115D
74F04
(DONE)1
(IOW)
(IOR)
B57
DAC1_IREF
-15V
C88
.1UF
R338
80.6
R103
432
R104
432
Q2
CR6
6
5
7
U4B
MC34002
U16
79L05
C54
.01UF
C86
.1UF
DB26
DB27
DB28
DB29
DB30
DB31
BRITE_(WR)
BRITE_(CS)
QADS16
B4
B4
8
-15V
-5VA
C253
10PF
+5V
+5V
PWRFAIL
OVERHEAT
I0
I1
I2
I3
I4
I5
I6
I7
Y5
24MHZ
C252
10PF
1
2
3
4
5
6
7
8
9
10
R67
4.7K
R68
10.0M
B5
B5
12
1
2
3
4
5
6
7
8
9
10
J8
J8
CONNECTS
TO J2
1
TP14
TP13R113
332
R102
475
+5V
R100
332
R101
475
L6
4.7UH
L5
4.7UH
1
2
16
15
FL11A
5
6
12
11
FL11C
HSYNC
VSYNC
B4
8
B4
8
R138 75.0
DB24
DB25
DB26
DB27
DB28
DB29
DB30
DB31
R137
75.0
P0
32
P1
33
P2
34
P3
35
P4
36
P5
37
P6
38
P7
39
OL0
41
OL1
42
OL2
43
OL3
44
SYNC
5
BLANK
7
D0
8
D1
9
D2
10
D3
11
D4
12
D5
13
D6
14
D7
15
IOR
25
IOG
26
IOB
27
CLK
40
RS0
17
RS1
18
RS2
19
8/6(NC)
2
RD
6
WR
16
SETUP
23
COMP
29
GND
24
GND
3
VAA
22
VAA
21
VAA
20
VAA
4
NC
1
VREF
31
IREF
28
OPA
30
U37
ADV478
PCLK
B0
B1
B2
B3
B4
B5
B6
B7
B[0..7]
B[0..7]
BLANK
QADS[0..31]
QADS[0..31]
D2
8
H3
1
B4
B2
8
D2
D2
8
DAC0_(RD)
DAC0_(WR)
B0
B1
B2
B3
B4
B5
QADS16
QADS17
QADS18
+5VA
+5VA
DB24
DB25
DB26
DB27
DB28
DB29
C135
.1UF
C137
.1UF
C136
.1UF
C138
.1UF
P0
32
P1
33
P2
34
P3
35
P4
36
P5
37
P6
38
P7
39
OL0
41
OL1
42
OL2
43
OL3
44
SYNC
5
BLANK
7
D0
8
D1
9
D2
10
D3
11
D4
12
D5
13
D6
14
D7
15
IOR
25
IOG
26
IOB
27
CLK
40
RS0
17
RS1
18
RS2
19
8/6(NC)
2
RD
6
WR
16
SETUP
23
COMP
29
GND
24
GND
3
VAA
22
VAA
21
VAA
20
VAA
4
NC
1
VREF
31
IREF
28
OPA
30
U15
ADV478
+5VA
C18
47UF
R136
75.0
A
A
C46
47PF
1
2
16
15
FL12A
7
8
10
9
FL11D
3
4
14
13
FL11B
A10A1
DISPLAY
MONITOR
BOARD
TP15
A
TO
EXTERNAL
MONIT0R
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
J3
(REAR PANEL)
A
A
A
A
A
A
C80
100PF
C81
100PF
C82
100PF
C294
100PF
C295
100PF
L11
330NH
L12
330NH
L13
330NH
C296
100PF
TP16
7
8
10
9
FL12D
5
6
12
11
FL12C
3
4
14
13
FL12B
R121
75.0
R119
75.0
R120
75.0
VCC
+5V
GND
+5VA
C6
47UF
DB30
DB31
C89
.1UF
C116
.1UF
C117
.1UF
C90
.1UF
DAC1_(RD)
DAC1_(WR)
B6
B7
QADS16
QADS17
QADS18
+5VA
D3
D3
8
AM 700 VRAMDAC AND FLOPPY DRIVE INTERFACE
PART OF A6 MAIN/CPU BOARD
9
OR
A13 J8
DISPLAY
DRIVER
BOARD