1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
A
A
B
B
C
C
U24(ACC_E)A
74HC00
1
3
2
ACC_E
U24(B_E)C
74HC00
9
8
10
B_E
U24(A_E)D
74HC00
D
D
12
11
13
A_E
U25(TMP_S)B
74HC00
4
6
5
TMP_S
U25(ACC_S)A
74HC00
1
3
2
VCC
VCC
ACC_S
U25(B_S)C
74HC00
VCC
9
8
1K
6
5
CV
4
C1
0.01F
7
DIS
R
8
2
SW2
SW_SPDT
TR
5
THR
B_S
U25(A_S)D
74HC00
3
12
DIS
7
11
13
2
4
R
3
C3
0.01F
C2
1F
Q
CV
1
6
VCC
8
VCC
3
RV1
1M
2
3
Q
E
10
U3
NE555
GND
THR
R2
7
TR
2
R6
1K
1
R
2
1
R5
1K
THR
A_S
6
1
DIS
3
R4
1M
U2
NE555
GND
CV
SW1
SW_SPST
1
4
Q
R3
1K
1
5
TR
GND
2
R1
1K
U1
NE555
VCC
8
E
C4
0.1F
C5
0.01F
GND
IAR_BUS_0
IAR_BUS_1
IAR_BUS_2
IAR_BUS_3
GND
GND
F
GND
U4C
74LS04
5
GND
GND
F
GND
CLK_INV
6
BLU
D11
U6D
74LS32
BLU
D12
BLU
D13
BLU
D14
BLU
D15
BLU
D16
BLU
D17
BLU
D18
WHI
D19
WHI
D20
WHI
D21
WHI
D22
WHI
D23
WHI
D24
WHI
D25
WHI
D26
13
U5A
74LS08
CLK_E
11
2
12
3
16
A3
A2
A1
A0
OEb
OEa
7
VCC
GND
VCC
U23(TMP)
74LS243
G
VCC
B3
B2
B1
B0
14
8
9
10
11
D3
D2
D1
D0
GND
11
12
13
14
15
6
5
4
3
13
1
6
5
4
3
Q3
Q2
Q1
Q0
U22(TMP)
74LS173
VCC
Oe2
Oe1
GND
GND
2
1
GND
8
VCC
Cp
E2
E1
14
VCC
Mr
GND
7
10
9
A3
A2
A1
A0
OEb
OEa
7
VCC
D3
D2
D1
D0
GND
16
VCC
B3
B2
B1
B0
GND
U21(ACC)
74LS243
8
9
10
11
8
VCC
6
5
4
3
13
1
6
5
4
3
Q3
Q2
Q1
Q0
U20(ACC)
74LS173
11
12
13
14
GND
14
Oe2
Oe1
VCC
2
1
GND
Cp
E2
E1
A3
A2
A1
A0
OEb
OEa
7
VCC
Mr
GND
16
VCC
6
5
4
3
6
5
4
3
Q3
Q2
Q1
Q0
GND
7
10
9
CLK_S
11
GND
8
VCC
15
BLU
D54
14
VCC
8
9
10
11
BLU
D53
D3
D2
D1
D0
BLU
D52
GND
11
12
13
14
BLU
D51
Oe2
Oe1
GRE
D50
2
1
WHT
D49
Cp
E2
E1
BLU
D48
Mr
RED
D47
7
10
9
GND
U5D
74LS08
12
15
GND
7
VCC
B3
B2
B1
B0
16
U19(B)
74LS243
8
9
10
11
VCC
D3
D2
D1
D0
GND
U18(B)
74LS173
11
12
13
14
8
5
U17(A)
74LS243
Oe2
Oe1
6
G
U16(A)
74LS173
B3
B2
B1
B0
Q3
Q2
Q1
Q0
GND
C6
1F
4
2
1
6
5
4
3
U5B
74LS08
2
13
1
CLK_DLYD
Cp
E2
E1
12
Mr
13
7
10
9
8
OEb
OEa
1
9
2
U4A
74LS04
15
CLK
3
U7F
74HC14
R7
100K
6
5
4
3
U4D
74LS04
A3
A2
A1
A0
U6A
74LS32
1
13
1
1
13
A_S
B_S
ACC_S
TMP_S
CLK_S
CLK_E
CLK
CLK_INV
ACC_E
B_E
A_E
TMP_S
ACC_S
B_S
A_S
IAR_BUS_3
IAR_BUS_2
IAR_BUS_1
IAR_BUS_0
CLK
BUS_0
BUS_1
BUS_2
BUS_3
H
D3
YEL
CLK_INV
CLK_INV
GND
D4
YEL
D5
YEL
D6
YEL
BUS_0
BUS_1
BUS_2
CLK_S
U10F
74LS04
A0
R12
100
R13
100
R14
100
ALU_BUS_IN_3
ALU_BUS_IN_2
ALU_BUS_IN_1
ALU_BUS_IN_0
R15
100
A1
12
A2
MAR_S
13
16
VCC
GND
8
8
11
12
13
14
GND
VCC
U9(MAR)
74LS173
16
R17
1K
BUS_0
BUS_1
BUS_2
BUS_3
VCC
BUS_0
BUS_1
BUS_2
BUS_3
I
6
5
4
3
1
15
Q3
Q2
Q1
Q0
GND
S
E
I0d
I1d
14
13
11
10
I0c
I1c
I0b
I1b
5
6
2
3
I0a
I1a
I
GND
R16
1K
GND
GND
D3
D2
D1
D0
2
1
Oe2
Oe1
7
10
9
Mr
Zd
VCC
Cp
E2
E1
15
12
9
Zc
Zb
Za
7
BUS_3
BUS_2
BUS_1
BUS_0
4
A3
U8(2x1MUX)
74LS157
H
BUS_3
PROG
1
2
4
5
6
7
8
6
U28(AND)A
74LS08
3
U28(AND)B
74LS08
11
SW4
SW_DIP_x04
3
U28(AND)D
74LS08
8
2
5
9
4
3
2
1
U28(AND)C
74LS08
D2
GREEN
1
12
R9
100
10
R8
100
D1
RED
SW3
SW_SPDT
13
VCC
J
J
GND
O0
3
2
U10D
74LS04
8
5
9
8
9
10
11
14
VCC
6
5
4
3
13
1
A3
A2
A1
A0
OEb
OEa
7
VCC
GND
VCC
B3
B2
B1
B0
GND
SHL_C_OUT
14
VCC
B3
B2
B1
B0
GND
GND
C_IN
GND
A3
A2
A1
A0
OEb
OEa
7
VCC
U32(SHR)
74LS243
8
9
10
11
14
VCC
6
5
4
3
13
1
6
5
4
3
A3
A2
A1
A0
OEb
OEa
C0
GND
GND
13
B1
B2
B3
B4
A1
A2
A3
A4
B3
B2
B1
B0
7
7
VCC
U31(SHL)
74LS243
8
9
10
11
5
VCC
U30(ADD)
74LS243
B3
B2
B1
B0
GND
GND
13
1
15
2
6
9
C4
S4
S3
S2
S1
U29(ADD)
74LS83
VCC
11
7
4
16
GND
12
14
8
9
10
11
VCC
14
6
5
4
3
A3
A2
A1
A0
VCC
GND
OEa
OEb
14
GND
10
8
3
1
11
10
9
8
B0
B1
B2
B3
5
A0
A1
A2
A3
7
VCC
U10C
74LS04
6
9
7
U12
74LS243
U27(AND)
74LS243
K
SHR_C_OUT
1
13
D0
OEb
OEa
16
VCC
1
A0
14
15
A1
O1
CS
K
O2
D1
3
3
4
5
6
4
D2
11
U10B
74LS04
4
GND
6
O3
U11(16x4RAM)
74LS189AN
U10A
74LS04
U10E
74LS04
10
8
10
D3
WE
12
A2
A3
13
13
1
VCC
ADD_C_OUT
11
2
ALU_BUS_IN_0
ALU_BUS_IN_1
ALU_BUS_IN_2
ALU_BUS_IN_3
RAM_E
1
16
12
9
Zd
Zc
D8
BLU
D9
BLU
D10
BLU
ALU_BUS_OUT_0
ALU_BUS_OUT_1
ALU_BUS_OUT_2
ALU_BUS_OUT_3
GND
S
E
I0d
I1d
GND
1
15
14
13
I0c
I1c
11
10
D7
BLU
8
GND
5
6
2
3
1
15
S
E
U14(2x1MUX)
74LS157
VCC
GND
I0b
I1b
VCC
Zb
Za
8
I0a
I1a
Zd
I0d
I1d
14
13
I0c
I1c
11
10
5
6
7
4
12
9
Zc
7
Zb
U13(2x1MUX)
74LS157
GND
I0b
I1b
VCC
2
3
L
16
I0a
I1a
VCC
Za
4
GND
L
PROG
U15A
74LS00
CLK_S
A>B
8
GND
7
GND
GND
GND
14
VCC
8
9
10
11
B3
B2
B1
B0
U38(XOR)
74LS243
7
VCC
GND
GND
14
VCC
VCC
A3
A2
A1
A0
8
9
10
11
B3
B2
B1
B0
Oa>b
Oa<b
Oa=b
VCC
U36(OR)
74LS243
OEb
OEa
16
VCC
A3
A2
A1
A0
VCC
B3
B2
B1
B0
14
U35(CMP)
74LS85
U45D
74LS08
ZERO
INS_0110
STEP_5
U45A
74LS08
2
13
STEP_6
STEP_5
STEP_4
STEP_3
12
U74(SHR_CARRY_S)C
74LS08
8
D55
BLU
10
CLK_S
6
5
4
3
13
1
11
8
6
13
12
9
5
4
2
1
12
10
8
J
6
1
H
G
GND
12
F
11
9
10
E
D
C
4
2
A
GND
7
GND
B
OEa
OEb
VCC
5
B0
B1
B2
B3
13
11
10
9
8
15
Mr
1
2
9
10
7
E1
E2
Cp
K
14
VCC
3
7
D56
RED
D57
GRE
P
D58
WHI
9
CLK
14
VCC
7
GND
VCC
14
VCC
7
GND
14
VCC
7
GND
14
VCC
8
U60(RAM_E)
CD4078B
J
6
13
1
VCC
K
8
6
U58(RAM_S)
CD4078B
J
K
8
U57(IAR_S)
CD4078B
J
6
1
13
13
1
VCC
VCC
7
GND
GND
12
H
G
F
11
9
10
E
D
C
5
4
B
A
2
3
H
G
GND
12
11
E
D
F
10
9
C
5
4
B
2
3
A
H
G
GND
12
11
9
10
F
E
D
C
5
B
4
2
3
A
H
G
12
11
9
10
F
E
D
C
5
GND
5
13
2
U52F
74LS04
3
A
Q
U52C
74LS04
B
6
U56(MAR_S)
CD4078B
J
K
INS_0010
K
INS_0101
STEP_2
8
6
1
13
GND
GND
Q0
Q1
Q2
Q3
GND
8
3
4
5
6
6
5
4
3
VCC
U76(FLAGS)
74LS173
3
4
5
6
9
14
VCC
GND
12
11
10
2
U72D
74LS04
4
8
GND
8
GND
U78(ZERO_S)
CD4078B
CARRY
A=B
A>B
ZERO
12
15
VCC
Mr
9
10
7
E1
E2
Cp
1
2
Oe1
Oe2
D0
D1
D2
D3
14
13
12
11
8
9
10
11
B3
B2
B1
B0
A3
A2
A1
A0
OEb
OEa
13
1
GND
16
VCC
VCC
Q0
Q1
Q2
Q3
H
G
F
E
D
16
VCC
GND
STEP_5
CLK_INV
RAM_E
RAM_S
IAR_S
MAR_S
VCC
13
9
10
7
GND
9
1
2
13
12
14
13
12
11
8
6
13
VCC
11
U77(FLAGS)
74LS243
1
13
14
VCC
13
A0
A1
A2
A3
10
U75(CARRY_S)
CD4078B
Oe1
Oe2
U74(SHL_CARRY_S)D
74LS08
3
4
5
6
11
BUS_0
BUS_1
BUS_2
BUS_3
U48(IR_S)D
74LS00
13
11
12
ZERO
D0
D1
D2
D3
12
U72E
74LS04
J
GND
INS_BUS_3
INS_BUS_2
INS_BUS_1
INS_BUS_0
CLK_S
O
8
5
1
2
3
CLK_E
P
ZERO
A=B
1
GND
E3
E2
E1
VCC
U73A
74LS10
IAR_S
14
N
C_IN
C_OUT
3
1
A>B
2
U26(ALU_DEC)
74LS138
2
VCC
U39(XOR)D
74LS86
CLK_INV
A0
A1
A2
16
IAR_BUS_0
IAR_BUS_1
IAR_BUS_2
IAR_BUS_3
U41A
74LS08
GND
3
11
8
6
4
5
RESET
6
5
4
VCC
7
U39(XOR)C
74LS86
U74(ADD_CARRY_S)A
74LS08
1
15
14
13
12
11
10
9
7
1
STEP_1
U47(IR)
74LS173
U39(XOR)B
74LS86
3
O0
O1
O2
O3
O4
O5
O6
O7
3
9
U46(IR)
74LS243
U39(XOR)A
74LS86
FLAGS_S
U72F
74LS04
C
5
4
3
4
6
K
12
12
B
13
11
8
U37(OR)D
74LS32
BUS_0
BUS_1
BUS_2
BUS_3
U80B
4073
A
13
11
3
4
U41D
74LS08
O
U37(OR)C
74LS32
9
5
3
1
5
10
U37(OR)B
74LS32
INS_1000
INS_1001
INS_1010
INS_1011
INS_1100
INS_1101
INS_1110
U45B
74LS08
U41C
74LS08
U37(OR)A
74LS32
U34(NOT)D
74LS04
1
U34(NOT)C
74LS04
GND
6
Q
6
5
4
3
13
1
15
13
12
10
8
3
U34(NOT)B
74LS04
12
11
10
9
5
4
3
2
12
11
10
9
5
4
3
2
6
4
U34(NOT)A
74LS04
2
7
H
G
F
E
D
GND
C
VCC
U44(IAR_CLOCK)
CD4078B
2
8
6
J
K
14
B
GND
H
G
F
E
VCC
A
6
1
13
13
8
7
GND
D
A
MR
GND
U43(IAR_E)
CD4078B
J
VCC
B
14
VCC
1
3
4
5
6
1
K
8
GND
C
15
VCC
PE
CEP
CET
CP
GND
U42
74LS161
TC
Q0
Q1
Q2
Q3
16
VCC
1
13
3
4
5
6
A0
A1
A2
A3
N
7
D0
D1
D2
D3
GND
OEa
OEb
VCC
M
GND
U40(IAR)
74LS243
B0
B1
B2
B3
14
VCC
WHI
D36
9
7
10
2
WHI
D35
14
13
12
11
WHI
D34
11
10
9
8
WHI
D33
6
5
4
3
13
1
GND
M
1
14
11
9
5
6
7
8
GND
VCC
A3
A2
A1
A0
GND
OEb
OEa
7
SW6
SW_DIP_x04
5
7
6
4
2
3
U33(NOT)
74LS243
Ia>b
Ia<b
Ia=b
8
9
10
11
B3
B2
B1
B0
BUS_3
BUS_2
BUS_1
BUS_0
CLK_S
CLK_E
CLK
CLK_INV
ACC_E
B_E
A_E
TMP_S
ACC_S
B_S
A_S
IAR_BUS_3
IAR_BUS_2
IAR_BUS_1
RAM_E
A=B
4
3
2
1
GND
RAM_S
MAR_S
1
A3
A2
A1
A0
2
3
2
IAR_BUS_0
1
OEb
OEa
SW5
SW_SPST
INS_0111
INS_0100
U55C
74LS08
U59A
74LS08
11
2
1
9
12
12
R
13
2
U59D
74LS08
U72A
74LS04
1
2
3
1
2
8
13
U79A
4073
5
4
9
3
U55D
74LS08
8
GND
8
GND
E3
E2
E1
A0
A1
A2
VCC
VCC
U59B
74LS08
6
5
4
16
VCC
U55A
74LS08
U53(NON_ALU_DEC)
74LS138
12
RED
D46
2
RED
D45
1
RED
D44
5
RED
D43
15
14
13
12
11
10
9
7
RED
D42
O0
O1
O2
O3
O4
O5
O6
O7
RED
D41
4
U54B
74LS08
11
6
6
1
1
GND
U52D
74LS04
9
U52A
74LS04
U54D
74LS08
2
8
2
R
1
INS_0000
INS_BUS_0
INS_BUS_1
INS_BUS_2
INS_BUS_3
10
INS_0011
GND
13
U54A
74LS08
INS_0110
3
U72B
74LS04
8
U52E
74LS04
11
U52B
74LS04
3
WHI
D40
3
WHI
D39
11
WHI
D38
3
WHI
D37
4
4
10
INS_0001
U59C
74LS08
S
10
9
6
6
3
4
5
U79B
4073
5
10
U55B
74LS08
4
10
CLK
ACC_E
B_E
A_E
TMP_S
ACC_S
B_S
STEP_6
STEP_5
STEP_4
STEP_3
C8
0.33F
A_S
GND
ZERO
GND
STEP_2
VCC
A->B
CE
GND
20
1
19
VCC
INS_BUS_3
INS_BUS_2
INS_BUS_1
INS_BUS_0
INS_0110
B0
B1
B2
B3
B4
B5
B6
B7
U51(STEP)
74LS245
9
18
17
16
15
14
13
12
11
12
3
2
4
7
10
1
5
6
9
11
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Cout
8
A0
A1
A2
A3
A4
A5
A6
A7
6
VSS
U54C
74LS08
STEP_1
C7
0.1F
VDD
2
3
4
5
6
7
8
9
THR
16
Reset
R
VCC
7
R11
680
15
DIS
U50(STEP)
4017
3
CLK
CKEN
Q
1
4
CV
R10
1M
U49
NE555
14
13
5
TR
GND
2
VCC
8
8
S
STEP_1
STEP_2
GND
T
T
STEP_4
STEP_5
STEP_6
STEP_5
STEP_4
STEP_3
STEP_2
STEP_1
INS_0110
ZERO
ACC_E
B_E
A_E
8
H
G
11
F
10
E
9
C
4
B
13
12
2
13
6
12
U
GND
V
5
8
4
U63B
74LS08
5
U61B
74LS08
4
7
U63D
74LS08
6
V
3
A
3
1
2
11
U63A
74LS08
U61D
74LS08
D
GND
11
2
12
11
9
10
5
4
3
2
12
11
9
10
5
4
3
2
3
1
U61A
74LS08
6
13
VCC
12
14
VCC
GND
5
7
H
G
F
E
D
GND
C
VCC
B
14
VCC
GND
H
G
F
E
D
C
U
7
GND
B
A
VCC
A
14
VCC
U65(ACC_E)
CD4078B
J
K
1
8
U64(B_E)
CD4078B
J
K
6
13
1
8
U62(A_E)
CD4078B
J
6
1
INS_0011
INS_0100
INS_0101
K
INS_0011
INS_0100
INS_0101
13
CLK
10
9
U61C
74LS08
W
W
STEP_4
STEP_5
STEP_6
TMP_S
ACC_S
B_S
A_S
H
U71(TMP_S)
CD4078B
7
GND
12
G
11
F
10
D
E
9
5
C
4
3
B
GND
A
VCC
GND
8
J
6
13
1
K
14
2
8
H
VCC
7
12
F
G
11
10
E
9
3
2
12
11
10
9
5
U70ACC_S)
CD4078B
3
2
B
GND
D
GND
C
VCC
A
H
G
F
E
D
14
5
VCC
4
7
J
K
GND
6
13
1
8
J
VCC
A
H
14
12
F
G
11
10
E
9
D
5
C
B
4
3
2
A
VCC
GND
C
GND
B
VCC
U69(B_S)
CD4078B
7
4
14
3
VCC
6
13
1
U67(A_S)
CD4078B
K
J
6
1
K
8
X
13
X
U66A
74LS08
U66C
74LS08
10
6
11
10
U68C
74LS08
9
4
13
12
U68B
74LS08
5
U66D
74LS08
5
4
U66B
74LS08
8
6
9
2
1
Y
8
Y
Z
3
Z
2
1
U68A
74LS08
STEP_4
STEP_5
STEP_6
[
[
\
\
]
]
Sheet: /
File: version2.0.sch
Title:
Size: User
Date:
KiCad E.D.A. eeschema (5.1.12)-1
^
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Rev:
Id: 1/1
23
^
24