UBI EasyCoder 501 – Service Manual
120
AD0-A15,A1-A20
IC06B
17
WR'
15
WR'
13
RD'
11
RD'
19
NHOLDA
74HC241M
9
IOR
7
RD
5
IOW
3
WR
GND
R4
13
HBE
11
12
IC01D
74HC32M
1
10
WR
8
9
A0
IC01C
WRL
WRH
74HC32M
10
9
CTTL
IC03C
8
CTTL'
1
43
AD4
42
AD5
41
AD6
40
AD7
GND
38
AD8
37
AD9
36
AD10
35
AD11
34
AD12
33
AD13
32
AD14
31
AD15
+5V
29
A16'
28
A17'
27
A18'
11
12
13
23
22
21
19
18
17
16
15
14
24
25
GND
+5V
INT
NMI
A21'
A22'
A23'
A20'
A19'
GND
/RESET
NEXTHOLD
NDMAHOLD
74HC08M
2
NHOLD
3
&
1
IC02A
R22
TSO
WR'
RD'
60
59
58
57
OSC
TSO
WR
RD
/RESET
61
RSTI
62
XIN
GND
GND
CWAIT
64
CWAIT
WAIT2
65
WAIT2
WAIT1
66
WAIT1
NRSTO
67
RSTO
NHOLD
68
HOLD
NHOLDA
1
HOLDA
HBE
2
HBE
+5V
VCC
4
SPC
NADS
5
ADS
DDIN
6
DDIN
7
PFS
8
ST3
9
ST2
GND
ST1
ST0
ILO
A21
A22
A23
VCC
BPU
U/S
INT
NMI
RESV
RESV
32CG16
IC07
PHI1
FCLK
PHI2
CTTL
AD0
VCC
GND
DBE
VCC
GND
47
48
49
50
53
55
+5V
GND
+5V
GND
AD0
CTTL
+5V
AD1
AD2
AD3
46
45
44
AD1
AD2
AD3
AD4
AD5
AD6
AD7
GND
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
VCC
A16
A17
A18
A20
A19
GND
NMI
INT
HOLDA
74AC14M
4
3
IC08B
R6
1
74AC14M
9
74AC14M
RESET
8
IC08D
ADS
2
IC08A
15pF
C3
R3
C2
R2
Y1
C1
L1
+5V
+5V
GND
GND
GND
IC04
WR
A23
A22
A21
A20
A19
A18
A17
A16
A15
AD0
A18
GND
4
3
NMI
R5
2
+5V
1
P3
GAL22V10
CIO
14
13
MEMTYPE
15
11
WAIT2
16
10
WAIT1
17
9
CSMEM
18
8
CS4
19
7
CS3
20
6
CS2
21
5
CS1
22
4
CS0
23
3
2
1
RESETB
RESETB
MEMTYPE
A18
74HC32M
2
A18/CS
3
1
IC03A
1
74HC32M
5
CS4B
6
4
IC01B
74HC32M
2
CS3B
3
1
IC01A
IO9
IO8
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
I9
I8
I7
I6
I5
I4
I3
I2
I1
I0
1
1
1
DMAHLDA
74HC541M
9
A23'
8
A22'
7
A21'
6
A20'
5
A19'
4
A18'
3
A17'
2
A16'
19
A16
A17
A18
A19
A20
A21
A22
A23
OE2
11
18
17
16
15
14
13
12
IC10
9
AD7
8
AD6
7
AD5
6
AD4
5
AD3
4
AD2
3
AD1
2
AD0
1
DMAHLDA
11
ADS
74HC573M
IC13
9
AD8
8
AD9
7
AD10
6
AD11
5
AD12
4
AD13
3
AD14
2
AD15
1
DMAHLDA
11
ADS
19
A15
18
A14
17
A13
16
A12
15
A11
14
A10
13
A9
12
A8
19
A0
18
A1
17
A2
16
A3
15
A4
14
A5
13
A6
12
A7
DMAHLDA
OE
LE
OE
LE
IC15
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
74HC32M
1
R1
+5V
EN
DDIN
A11
A12
TSO
CIO
A13
WRADDR
WRSENS
WRHPC
RDHPC
IC09
74HC138M
7
9
6
10
5
11
4
12
13
3
14
2
15
1
6
5
&
4
3
2
2
7
1
G
1
0
0
0
DX
IC702A
WAIT8 1
&
WAIT 2
74HC08M
3
11
1
A10
A11
A12
A13
CIO
+5V
IC16
74HC138M
CSTIMER
7
CSDI
9
6
CSPANEL
10
5
CSX1
11
4
CSX0
12
CSAD
13
3
CSDMA
14
2
CSRTC
15
1
6
5
&
4
3
2
2
7
1
G
1
0
0
0
DX
A10
A11
A12
GND
CIO
A13
CS8255B
CS8255A
IC12
74HC138M
7
9
6
10
5
11
4
12
13
3
14
2
15
1
6
5
&
4
3
2
2
7
1
G
1
0
0
0
DX
CTTL' 8
+5V 9
CSDIS 1
+5V 2
5
4
3
6
TSO
4
5
IC17B
74HC02M
1
IC18
IC19F
ECLK
13
1
74HC04M
12
13
12
13
IC03D
12
11
10
6
74HC02M
>C1/
R
+
&
1D
WAIT
CWAIT
A11
A12
A13
A10
A11
A12
A13
R7
GND
+5V
R9
+5V
+5V
R8
+5V
74HC573M
OE1
74HC164M
VEE
VEE
FCLK'
R34
17.6:1
CG16 Master Processor
17. CPU BOARD, cont'd.
Содержание EasyCoder 501 SA
Страница 214: ...UBI EasyCoder 501 Service Manual 214 NOTES...