Kragelj ZX Spectrum Schematics
PCA9564D
S82C55A
DAC8574IPW
MCP3424-E/SL
74HCT86D
74HCT86D
74HCT86D
74HCT86D
74HCT138D
+5V
+5V
+5V
GND
+5V
GND
10K
47uF 16V
47uF 16V
.1uF
10K10K
330
330
330
GND
10K
10K
GND
+3V3
GND
+5V
GND
100
+5V
GND
4K7
GND
1uF
+5V
GND
AD8572
0ohm
1K
.1uF
0.1uF
AD8572
0.1uF
0ohm
.1uF
1K
GND
GND
AD8572
0ohm
1K
.1uF
0.1uF
AD8572
0.1uF
0ohm
.1uF
1K
GND
GND
GND
GND
GND
GND
39K
10K
39K
10K 10K
39K
10K
39K
GND
GND
10K
10K
10K
10K
10K
10K
10K
10K
+5V
+5V
+5V
JP1-100
JP1-100
JP1-100
GND
GND
GND
+5V
10K
JP1-100
GND
+5V
GND GNDGND
+3V3
1K
GND
.1uF .1uF .1uF
GND GND GND GND
+5V +5V +5V +5V
.1uF
GND
+3V3
+5V
GNDGND
+5V
GND
22uF
GND
47uF 16V
GND
.1uF
+5V
GND
+3V3 +3V3
.1uF
.1uF
.1uF
.1uF
xxK
xxK
xxK
xxK
GND
GND
GND
GND
DTSM-6
GND
+5V
GND
LD117AS33TR
+5V
LM4050 5V
GND
+5V
LM317MBSTT3
220
720
.1uF
GND
GND
+12V
B22
-5V
B20
-12V
B23
/BUSACK
A26
/BUSRQ
A19
/HALT
B15
/INT
B13
/IORQ
B17
/IORQ_ULA
A13
/M1
B24
/MREQ
B16
/NMI
B14
/RD
B18
/RESET
A20
/RFSH
B25
/ROMCS
A25
/WAIT
B21
/WR
B19
/Y
A16
5V
A3
9V
A4
A0
A9
A1
A10
A2
A11
A3
A12
A4
A24
A5
A23
A6
A22
A7
A21
A8
B26
A9
A27
A10
B27
A11
A28
A12
A2
A13
B2
A14
A1
A15
B1
CK
A8
D0
B6
D1
B7
D2
B8
D3
B11
D4
B12
D5
B10
D6
B9
D7
B3
GND_1
A6
GND_2
A7
GND_3
A14
NC
B4
NC2
B28
U
A18
V
A17
VIDEO
A15
U6PWR
GND 3.3V
10 20
U6IC$1
D0
1
D1
2
D2
3
D3
4
D4
5
D5
6
D6
7
D7
8
A0
14
SDA
19
SCL
18
/CE
13
/RST
17
/INT
16
/WR
11
/RD
12
A1
15
VCC
29
~CS
7
RESET
39
~RD
6
~WR
40
A0
10
A1
9
PA0
5
PA1
4
PA2
3
PA3
2
PA4
44
PA5
43
PA6
42
PA7
41
PB0
20
PB1
21
PB2
22
PB3
24
PB4
25
PB5
26
PB6
27
PB7
28
NC_2
1
NC_3
12
NC_4
23
NC
34
GND
8
PC0
16
PC1
17
PC2
18
PC3
19
PC4
15
PC5
14
PC6
13
PC7
11
D0
38
D1
37
D2
36
D3
35
D4
33
D5
32
D6
31
D7
30
U5
U4
SCL
10
GND
6
SDA
11
A0
13
A1
14
VOUTC
7
VOUTB
2
VOUTA
1
VREFL
5
VREFH
3
IOVDD
12
VDD
4
VOUTD
8
A2
15
A3
16
LDAC
9
VDD
6
CH1+
1
CH1-
2
CH2+
3
CH2-
4
CH3+
11
CH3-
12
CH4+
13
CH4-
14
SCL
8
ADR0
9
ADR1
10
VSS
5
SDA
7
U1
U8A
1
2
3
U8B
4
5
6
U8C
9
10
8
U8D
12
13
11
U8P
GND VCC
7 14
U7
A
1
B
2
C
3
G2A
4
G2B
5
G1
6
Y7
7
Y6
9
Y5
10
Y4
11
Y3
12
Y2
13
Y1
14
Y0
15
U7P
GND VCC
8 16
ULN1
1
2
3
4
5
6
7
8
9 10
11
12
13
14
15
16
17
18
LD3
LD2
LD1
LD4
J6-1
J6-2
J6-3
J6-4
J5-1
J5-2
J5-3
J5-4
J4-1
J4-2
J4-3
J4-4
J3-1
J3-2
J3-3
J3-4
J9-1
J9-2
J9-3
J9-4
J8-1
J8-2
J8-3
J8-4
J7-1
J7-2
J7-3
J7-4
R32
C24
C23
C2
R33R34
R39
R38
R37
R31
R30
R36
C16
2
3
1
U3A
R12
R22
C13
C3
U3B
6
5
7
VCC+
VCC-
U3P
84
C15
R24
C14
R23
2
3
1
U2A
R11
R17
C10
C1
U2B
6
5
7
C12
R19
C11
R18
VCC+
VCC-
U2P
84
R10
R9
R4
R3 R5
R6
R7
R8
R28
R27
R26
R15
R14
R13
R2
R1
JP3
12
JP2
12
JP1
12
R35
JP4
12
C7 C18 C 22C17
J1-1
J1-2
J1-3
J1-4
J1-5
C20
C21
C4
C6
C5
C9
C8
R21
R25
R16
R20
S1
1 3
42
IC2
ADJ
IN OUT
REF1
ADJ
IN OUT
IC1
R41
R40
C19
J2-1
J2-2
J2-3
J2-4
J2-5
A13
A15
A11
A9
BUSACK
ROMCS
A4
A4
A4
A5
A5
A5
A6
A7
RESET
RESET
BUSRQ
U
V
Y
VIDEO
GND
GND
GND
IORQULA
A3
A3
A2
A2
A1
A1
A0
CK
A12
A14
A10
A8
RFSH
M1
-12V
+12V
WAIT
-5V
WR
WR
WR
WR
RD
RD
RD
RD
IORQ
IORQ
MREQ
HALT
NMI
INT
D4
D4
D4
D3
D3
D3
D5
D5
D5
D6
D6
D6
D2
D2
D2
D1
D1
D1
D0
D0
D0
D7
D7
D7
SCL
SCL
SCL
SCL
SDA
SDA
SDA
SDA
CS
CS
+9V
+9V
+9V
+5VSPECCY
+5VSPECCY
A
B
e
e
e
e
+
+
ZXSpectrumMultiIO
10/10/2014 18:25:14
1/1
Sheet:
A
B
C
D
E
1 2 3 4 5 6 7 8
A
B
C
D
E
1 2 3 4 5 6 7 8
+
CH.69
CH.4C
8 x INP.8 x OUT.
ZX SPECTRUM E DGE CONNECTO R
TOPBOTTOM
4 x INP.4 x OUT.
EX-OR
EXTERNAL
I2C BUS
4 x ANALOGUE
0-5VDC OUTPUT S
4 x ANALOGUE
0-5VDC INPUTS
8 x DIGITAL
INPUTS
8 x DIGITAL
OUTPUTS
4 x LINKS
DIGITAL INPUTS
3 x LED'S
(5.3VDC)
(5.3VDC)
5.000VDC VREF
SUPPLY
OUTPUTS
R20 & C12
NOT FITTED
R16 & C1
NOT FITTED
R25 & C15
NOT FITTED
R21 & C3
NOT FITTED
EXT. V+
LOAD
D1
D0
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
EXT. V+
+
-
GND
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