HARLEQUIN 128 issue 2 (PDF)

2

D2
D3
D4

R

B2

G

Spkr
J8
M-DIN_8-R

270

150

Mic

2

68

D5
R38

R21

R43

68

68

68

68

Q2
BC548

Q1
BC548

KB4
Ear

J2

74HC174

1
2
3
4
5

1N4742A

1

R48

R20

VCC

OE1
OE2

KB0
KB1

18
17
16
15
14
13
12
11

VD0

1
19

AL

VD1

1

VD2

2

74HC32

KB3
KB4

U1

R6

D6

10k

D7

14
15
12
8
7
9
10
13

RST

26

D0

U5C

D1

9

D2

8

VCC
10

D3

WR

D4

2.2K

VCC

R29

R30

R31

18K

3.9K

2.2K

U40
2
3
4
5
6
7
8
9

CA10
CA9
CA8
CA4
CA3
CA2
CA1

U31

CA0

1G

7

1C0
1C1
1C2
1Y1C3
B
A

B

9

2Y2C0
2C1
2C2
2C3
2G

1
U38
6
5
4
3

DD4

U33

B1

19
18
17
16
15
14
13
12

DD0
DD1
DD2
DD3
DD4

10
11
12
13

DD5

DD5

DD2

DD6

B2

DD7

2
3
4
5
6
7
8
9

1D
2D
3D
4D
5D
6D
7D
8D

19
18
17
16
15
14
13
12

11
1

CLK
OC

15

1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q

2
3
4
5
6
7
8
9

1D
2D
3D
4D
5D
6D
7D
8D

VD0
VD1

OutLatch

10

VD2
VD3
VD4

VCrst

11

VD5
VD6
VD7

11
1

CLK
OC

74HC574

9
7
6
5
3
2
4
13
12
14
15
1

CA0

19
1

18
17
16
15
14
13
12
11

B1
B2
B3
B4
B5
B6
B7
B8

VA7

VA0

VA6

VA1

VA5

VA2

VA4

VA3

VA3

VA4

VA2

VA5

VA1

VA6

VA0

VA7
VA8
VA9

G
DIR

CA1

VA10
VA11

74HC245
U41

CA2
CA3

15
1

CA4
CA5
CA7

CA11

CA8

CA5

CA9

VC7

CA10

CA6

2
3
5
6
11
10
14
13

CA11
CA11

74HC4040
CA7

VA12
VA13
VA14

G
A/B

CA6

1A
1B
2A
2B
3A
3B
4A
4B

74HC574

12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31

VA15

1Y
2Y

4

VA8

VRD

7

VA9

VCS

U34

2Y2C0
2C1
2C2
2C3
2G

6
5
4
3

DD0
B0

U30A
2
14

1 13
3
2

10
11
12
13

DD6

74HC86

2
3
4
5
10
11
12
14

A
B
C
D
E
F
G
QH H

DD3

19
18
17
16
15
14
13
12

1
15
7
6

SER
SH/LD
CLK
CLK_INH
CLR

B
A

1

74HC253

24
29
22
30

VCC

3Y

2
3
5
6
11
10
14
13

VD2
VD3

VC7

VD4
VD5
VD6
VD7

VD1

VD1

VD2

VD2

VD3

VD3

VD4

VD4

VD5

VD5

VD6

VD6

VD7

VD7

9
7
6
5
3
2
4
13
12
14
15
1

4
6
5
74HC08
DD7

74HC86

9

3Y

VA5
VA4
VA3
VA2
VA1
VA0

A1
A2
A3
A4
A5
A6
A7
A8

D4

R3

D5

R4

D6

R5

U30C

R10

R11

VA9

10k

10k

VA10
VA12

VCS

VCS

VA13

VRD

VRD

U5D
13

A1
A2
A3
A4
A5
A6
A7
A8

19
1

INT

A7

Z80-CPU

A6
A5
A4
A2

WR

12

11

A0

18
17
16
15
14
13
12
11

B1
B2
B3
B4
B5
B6
B7
B8

R32

A12

470

9

RD

Q

8

D

QCLK

12

5

11

6

C0

74HC08
U24C

C2
C3
C4

8

C5
C6

8
VCC

10

12

3

9
7
6
5
VC4 3
VC5 2
VC6 4
VC7 13
VC8 12
14
15
1
VC0

11

QA
QB
QC
QD
QE
CLK
QF
QG
QHCLR
QI
QJ
QK
QL

VC1

74HC08

13

VC2
VC3

74HC00

74HC08
U26A
U28D

1
13

3

11

2
12

U26B

74HC08
5

VC5

74HC32

6

VC4

4

74HC11

15
14
13
12
11
10
9
7

PRE

4

D

QCLK

HC2

HCa

HC3

HC0
HC1

14
13
12
11
15

2

3

HC3

2

HC8

HC4

3

HC5

74HC32

15
14
13
12
11
10
9
7

HQ1

U21B
4

11

74HC32

HQ2

74HC00

HQ3

74HC00
HQ5

U23B
4
6

74HC4040

HC0

HC6
HC7

U20A

HC8

1

5

HC1

3

14
13
12
11
15

D

QA A
QB B
QC C
QD D
RCO
CLK
ENT
ENP
LOAD
CLR

2
4

HC5

6

HC6

74HC00
5

HC7

VCC
6
5
4

HCa

74HC00

VCC
HC6

9

HC7

1

R7
470

VCC

C3
10uF

Y1

1-2 = 48K TIMING
2-3 = 128K TIMING

28.000MHz = 48K TIMIMG
28.375MHz = 128K TIMING

J9,J10,J11

Y2

1-2 = NTSC
2-3 = PAL

3.579MHz = NTSC
4.433MHz = PAL

nA14

HC8

2

2
74HC04

C6

22uF

C5

C9

C10

C11

C12

C13

C14

C15

C16

C17

C19

C20

C21

C39

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

BK1

U55C
8

A8

M1

A10

RFSH

-12V

+12V

RD

WR

WAIT

IORQ

-5V

MREQ

D3

HALT

D5

NMI

D6

INT

D2

D1

D4

A11

A9

A5

A4

A6

BUSAK

ROMCS

A7

RST

A3

A2

BUSRQ

A8

D3

A9

D4

A10

D5

A11

D6

A12

D7

A13
RA14
RA15
GND

24
29
22
30

RD
WR
RAM
A15

Q6
2SA1175

Q7
2SA1175

Q8
2SA1175

Q9
2SA1175

D2
D3
D4
D5
D6
D7

OE
WE
CS1
CS2

4.7K*8

J1

1
2
3
4
5
6
7
8

Q10
2SA1175

Q11
2SA1175

Q12
2SA1175

Q13
2SA1175

U22B
U11A

2

VSyncEn

3

HCrst

U13C

4

1

6
3 5

6

D

5

2

C7

2

B

RCPT 8

3
74HC08

74HC04

A5

5
RD

VCC U39 1N4148
16
VCC OE1
OE2

74HC74

CLK7

U13E
11

VCC

U12D
10

U11B

12

nA14

A15

12

nBK0

13

D0
D1
D2
D3
D4
D5

U12B

4

MCON

5

13

R58
10K

1N4148
D7

6

CLKQ

74HC32

D6

U10A
Q

6

6

5

4

74HC32
74HC08

3
5
7
9
11
13

74HC32

Y1
Y2
Y3
Y4
Y5
Y6

A1
A2
A3
A4
A5
A6
GND

1
15 IORQGE
J13
2 S0
4 S1
6 S2
10 S3
12 S4
14 VCC

S2
S1
S0
S4
S3

74HC08

3
4
5
6

U11C

VCC

8

Header 8

8

BK0

13

A14

12

D

11

9

Q

VCC

U12C

1

8

2
74HC32

74HC74

R59

1
2
3
4
5
6

S0
S1
S2
S3
S4

3

CLKQ

74HC08
10

HC0

8

C
10k

VCC

9

CLK

U13D
74HC32

3
4
5
6

9
74HC04

U51D
U4

U45B

2
10
7
9
1

HCa

11
12

A15

U29D

CLKQ
D

1
2
3

A14

Q

8

12

9

13

WR

11

CLKB
A12
IORQGE

74HC08

74HC74

A1

6
5
4

13

A Y0
B Y1
C Y2
Y3
Y4
G1 Y5
G2BY6
G2AY7

15
14
13
12
11
10
9
7

11 BDIR
12
74HC00
U51C
10
8

74HC138

BC1

9

VCC
3
4
5
6

R15

R17
4k7

D0
D1

U13A

4

CLK14

3

2

D2

1

D3
D4

R16

74HC04

1K

C2

D5

74HC04
Y1

28.375MHz

27pF

74HC00

U50

2.2M

U13B

2
10
7
9
1

RST

3
4
6
11
13
14
1
9

1D
2D
3D
4D
5D
6D

1Q
2Q
3Q
4Q
5Q
6Q

2
5
7
10
12
15

BK0
BK1
BK2
VB
ROM0

D3

CLR
CLK

1N4148

74HC174

C4
27pF

U20C
8
10
74HC00

U22C
nAL

U52B
3

6
AL

74HC08

13

AL

12

5

8 VA15

11

74HC32
74HC32

U51B

11VA14
13

9
10

nA15

U52D
12

74HC08
U53D

VB

U52C

4

74HC08
8

8 RAM
74HC32

2

9

5
10

9

1

BK2

U53C
6

74HC08

A14

D

RA15

U53A

U53B

A15

11

MREQ

12

10

MREQ

GND
U10B
U12A

9

IORQULA

2
10
7
9
1

1
2
3
4
5
6
7
8

74HC366

4
6 nA15

A15

Title

5

74HC32

ZX Spectrum Superfo Harlequin 128K

74HC00
Document Number

Rev

A

2

Date:

3

D1

A15

Size

2

D0

A14

12

74HC08
1

13
14
15
17
18
19
20
21

HM628128
R13

A8

VRAM

D0
D1
D2
D3
D4
D5
D6
D7

VCC

A13

13

4

74HC32

10
74HC11

A7

A10

RA14

2

U24D
9
10
11

D1
D2

A12

3

74HC00

C29

220uF

D0

RESET

ROMCS

74HC08

1

3 nBK0

BK0

VCC

3

2

DC JACK
J14,J15

Vin
Vout
GND

VD7

9

U46 OKI-78SR-5
1

+9V

1
2

U52A

1
12

A6

OE
WE
CS1
CS2

A11

U22D

74HC08
U24A

HC3

U51A

U13F
VCC
13

VC0

D0

UM61512

RST

3

3
2
1

D7

RD

8

1
2
3

74HC138

VC2

J4

A15

74HC161
U29C
J15

VC1

24
29
22
30

RAM

10

74HC00

74HC11

RA15

U16

74HC32

1
2
3

VD6

VCC

U55B
6

A13
RA14

VCC

CON3

3
4
5

A8

A12

74HC161

VCrst

D

A7

13
14
15
17
18
19
20
21

I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16

RFSH

10

U20B

Y0 A
Y1 B
Y2 C
Y3
Y4
Y5 G1
Y6G2B
Y7G2A

VD5

A

WR

C6

QA A
QB B
QC C
QD D
RCO
CLK
ENT
ENP
LOAD
CLR

5

U18
1

14
13
12
11
15

9 6
13

3

74HC08

A6

D7

8
HC2

74HC32

2
11

D6

27C256

MREQ

U9A

QA A
QB B
QC C
QD D
RCO
CLK
ENT
ENP
LOAD
CLR

HC2

74HC32

8
10

A5

VPP

M1

VCC
HC1

VCC
6
5
4

12 8

U23A

VD4

U15

HC8

HBlank

D5

A11

74HC161

HC4

10

A4

A10

U14
1
2
3

Y0 A
Y1 B
Y2 C
Y3
Y4
Y5 G1
Y6G2B
Y7G2A

VCC
U21C

3
2

VD3

OE
WE
CS1
CS2

11

1

U21D

1
2

U23C
9

D4

U11D

74HC74
VCC
U28A

3

PRE

10

6

Q

13

CLR

D

4

U25

U26D

CON3

Q

74HC74

9

U55A

QCLK
PRE

6

5

11

QCLK

U45A
HSync

12

D

74HC74

1

10

A3

A9

HC6

1

12 8

5

VBorder

Q

9

74HC32

3
2
1

1

IORQ

D3

OE
CE

HALT

74HC74

U21A

CLR

U28C

74HC86

2

BUSAK

A2

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15

J12

QCLK

VCC
U19A

CLR

13

1

9

VD2

74HC32

Q

74HC00
U17

5

Vout

VD1

VCC

C1

11

8

ROM0

22
20

13

6

AL1

74HC00

U26C

J11

A13

VCC

A15

MCON

74HC74

4
11

12

VSyncEn

CON3

A13

U20D

13

CON3

U27A

A12

12

5

1
2
3

A12

A1

D2

Den

U9B

A13
VRAM

11

74HC00
J14

A11

D1

12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31

VCC

A11

U24B

VCC

J10

6

A11

A0

A5

A9

A10

OutLatch

U27D

VD0

A9

74HC245

nAL

11

13
14
15
17
18
19
20
21

A8

10

U30D

4
74HC08

A10

10k

VCC

4

10pF

A9

A10

74HC04

U19B

74HC32
U27B

A8

A9

3

74HC138

6

2

A7

A8

74HC00

10

3

A6

A7

12

QA
QB
QC
QD
QE
CLK
QF
QG
QHCLR
QI
QJ
QK
QL

74HC00
U28B

10k

A6

A14

23
18
20
27
19
21
22
28

R51

9

1
2
3

A5

74HC32

8

5

A5

D0

2

MREQ

74HC08

1

A4

1

A15

10

U29A

A4

A1

9

Blank

A3

11
12
13
15
16
17
18
19

O0
O1
O2
O3
O4
O5
O6
O7

11

U27C

12

1N4148

A3

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14

AL

AL2

1
2
13

1N4148

D2

A2

A14

74HC4040

ComSync

D1

A1

U22A

A14

A3

C7

C40

6

NMI
WAIT
BUSRQ BUSAK
INT
HALT
IORQ
M1
CLK
MREQ
RD
WR
REFSH

A1
A2

10
9
8
7
6
5
4
3
25
24
21
23
2
26
27

74HC32

10

R22

17
24
25
16

10kBUSRQ

D7

G
DIR

11

74HC257

9

74HC86

10kNMI
10kWAIT

G
DIR

2
3
4
5
6
7
8
9

VA11

VWR

D3

A0

74HC245
U44

VRD

U23D

VCC

D2

10uF

A0

11

19
1

VCC

18
17
16
15
14
13
12
11

B1
B2
B3
B4
B5
B6
B7
B8

RST

C1

D1

30
31
32
33
34
35
36
37
38
39
40
1
2
3
4
5

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15

D0

U43
2
3
4
5
6
7
8
9

VA7
VA6

12 VCS

4Y

16
15
14
13
12
11
10
9

B0
B1
B2
B3
B4
B5
B6
B7

CLK

7 VA13

2Y

A0
A1
A2
A3
A4
A5
A6
A7
RES x 8

4 VA12

1Y

8

C

1
2
3
4
5
6
7
8

VA8

U37

U29B
VCC
4

1A
1B
2A
2B
3A
3B
4A
4B

VD0

UM61512

VCC

G
A/B

VD1

VD0

OE
WE
CS1
CS2

12VA10

4Y

13
14
15
17
18
19
20
21

I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7

D0
D1
D2
D3
D4
D5
D6
D7

13

6
5

VD0

11
1

CLK
OC

VCC

U30B

2
3
4
5
6
7
8
9

1D
2D
3D
4D
5D
6D
7D
8D

74HC574

74HC166

15

1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q

15
1

CLK7

9

1G
1C0
1C1
1C2
1Y1C3

U36

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15

9 VA11

74HC257
U42

U32

9

U35

1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q

VCC

QA
QB
QC
QD
CLK
QE
QF
QG
CLRQH
QI
QJ
QK
QL

DD1

2
14

74HC253

7

A1
A2
A3
A4
A5
A6
A7
A8

U47

U8

U3

U2

1

R28

3.9K

10

R27

18K

PRE

R26

A13

A3
A4

Q4
BC548

VCC

B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
B25
B26
B27
B28

A2
IORQ

CLR

2.2K

B1
B2
B3
B4

6
RD

D0
D1
D2
D3
D4
D5
D6
D7

U3x
12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31
2

A0
A1

5

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16

HM628128

470
IORQULA

13

R25

3.9K

VCC

74HC541

KB2

24
29
22
30

VRD
VWR

VCC

R9

4

74HC32
R24

GND

IORQGE

U5B

VCC
18K

VA15

74HC32

VD7

RCPT 5

R23

VA12

VCS

D5

VCC

VA11

10k*8

VD5
VD6

VA10

VA14

R1

AY-8912

VD4

VA8

A0

3

VD3

270

Q3
BC548

D7

U5A

VA7

D7

68

D1

Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7

D5

R19

D3

1
9

CLR
CLK

KB2
KB3

A0
A1
A2
A3
A4
A5
A6
A7

D6

R34

D4
D5

KB1

2
3
4
5
6
7
8
9

D4

270

D2

KB0

D3

B1

R18

10k*8

D0

D2

6
4
3
1

3
4
6
11
13
14

1D
2D
3D
4D
5D
6D

VA6

VA13

D1

Audio

R8

1Q
2Q
3Q
4Q
5Q
6Q

VA5

Audio2

D0

7
8
5
2

CSync

R12

2
5
7
10
12
15

VA4

1
2
3
4
5
6
7
8
9

B0

D6

4

+9V

U6

VA3

Audio1

PRE

VCC
2.7K

D5

CLR

R2

U7

A

VCC
1
2
KB0
3
KB1
4
KB2
5
KB3
6
KB4
7
8
9

VA2

1
2
3
4
5
6
7
8
9

CON3

GND

D1

R49

R56 R57
1K 1K

IORQGE

1
2
3

4.433MHz

B

28
27
26
25
24
23
22
21

D0

VA1

VA9
A1

3.3nF

AUDIO

A0

EAR/MIC

14
13
12
11
10
9
8
7

CLKB

BDIR

C38 2.2uF

12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31
2

VA0

ZX_EDGE
J3

GND

12K

10k

C-AY

J5

A1
A2
A3
A4

1nF

20
19
18
17

BC1

5
4
3
2
1

A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28

12K

R36

1nF

C36

A15

2
R46

C18

B-AY

1K
2K
2K
1K

GND

3.3nF

R45

12K

J6

R52
R53
R54
R55

A-AY

+9V

J9

VCC

3

+

0.1uF

75

C35

0.1uF

C37 2.2uF
5
4
1

A12

220uF

7

33K

1
13
2

5
4
3
2
1

C32

VIDEO

Audio

/RESET
CLK ChA
ChB
BC1
ChC
BC2
BDIR
A8
IO0
IO1
D0
IO2
D1
IO3
D2
IO4
D3
IO5
D4
IO6
D5
IO7
D6
D7

A14

R42

HC1

VCC

C28

2

-

16
15

RST
R35

1

Y2

STDN
SELECT DGND
FIN
AGND
AD724JR

J7

11
9

6

C7

R33

U54

VCC

1N4740A
C8

PRE

4.7M

VSYNC LUMA
HSYNC CRMA

0.1uF

D4

U49
TL712

0.1uF

CLR

75

C30

100K

0.1uF

10

75

C34
Audio2

13

10pF
75

Audio1

13

C25

10uF

CLR

1
12
3

C27

0.1uF

PRE

R50

C26

10

10

R39

4
14

6
U8x

4

R40

CMPS

5

PRE

0.1uF

15
16
R41

APOS
DPOS

BIN
GIN
RIN

4

VCC

R44

1

8
7
6

C24

R

ENCD

0.1uF

0.1uF

C33

0.1uF

4
8

C23

G

C31

2

5
C22

B

3

VCC
U48

5

VCC

CLR

1

4

5

Sheet

6

1

of

1

Comment

Designator

Quantity

Comment

Designator

Quantity

10uF

C1, C3, C27

3

2.7K

R49

1

27pF

C2, C4

2

4.7M

R50

1

10pF

C40, C25

2

1K

R16, R52, R55, R56, R57

5

0.1uF

C5, C9, C10, C11, C12, C13, C14, C15, C16, C17, C19, C20

12

2K

R53, R54

2

0.1uF

C7, C8, C21, C22, C23, C24, C26, C30, C31, C33, C34, C39

12

4.7k * 5 Network Resistor (SIP)

R59

1

22uF

C6

1

Z80-CPU

U1

1

1nF

C18, C32

2

27C256 (ZX 128K ROM)

U2

1

220uF

C28, C29

2

UM61512 or KM681000 or HM628128

U3, U8

2

3.3nF

C35, C36

2

74HC138

U4, U17, U18

3

2.2uF

C37, C38

2

74HC32

U5, U12, U21, U22, U28, U52

6

1N4740A

D4

1

74HC541

U6

1

1N4742A

D5

1

74HC174

U7, U50

2

1N4148

D1, D2, D3, D6, D7

5

74HC74

U9, U10, U19, U45

4

RCPT 8

J1

1

74HC08

U11, U24, U26, U29, U53

5

RCPT 5

J2

1

74HC04

U13

1

DC JACK

J4

1

74HC161

U14, U15, U16

3

AUDIO JACK

J5

1

74HC00

U20, U23, U27, U51

4

EAR/MIC JACK

J6

1

74HC4040

U25, U37, U38

3

VIDEO JACK

J7

1

74HC86

U30

1

Mini-DIN 8

J8

1

74HC253

U31, U32

2

Header 2

J9, J10, J11, J12

4

74HC574

U33, U35, U36

3

Header 4x2

J13

1

74HC166

U34

1

BC547 or BC548

Q1, Q2, Q3, Q4

4

74HC245

U40, U43, U44

3

2SA1175 or 2SA1309A

Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13

8

74HC257

U41, U42

2

10k * 8 Network Resistor (SIP)

R1, R2

2

OKI-78SR-5 or RECOM R-78E5.0-1.0

U46

1

10k

R3, R4, R5, R6, R10, R11, R22, R36, R51, R58

10

470 * 8 Network Resistor (DIP)

U47

1

470

R7, R9, R32

3

AD724JR

U48

1

2.2M

R15

1

74HC11

U55

1

150

R8

1

TL712

U49

1

270

R12, R18, R48

3

AY-8912

U54

1

4.7k * 8 Network Resistor (SIP)

R13

1

74HC366 or 74HCT366 or 74LS366

U39

1

4k7

R17

1

28.375MHz

Y1

1

68

R19, R20, R21, R34, R38, R43

6

4.433MHz

Y2

1

18K

R23, R26, R29

3

SOCKET 8 PIN

1

3.9K

R24, R27, R30

3

SOCKET 14 PIN

22

2.2K

R25, R28, R31

3

SOCKET 16 PIN

16

33K

R33

1

SOCKET 20 PIN

7

12K

R35, R45, R46

3

SOCKET 28 PIN

2

75

R39, R40, R41, R42

4

SOCKET 32 PIN (300mil or 600mil)

2

100K

R44

1

SOCKET 40 PIN

1

Q6-Q13 can be replaced with Diode 1N4148
(don’t need to install R13 if using diode)

U7 is under AY-8912

U46 use OKI regulator or RECOM regulator