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Sharp PC-1600 - Page 58

Sharp PC-1600
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MEMORY CIRCUIT DIAGRAM
Parts
Parts name
Nn
ICI 64K SRAM
IC2 64K SRAM
IC3
256K ROMI
IC4
256K ROM2
IC5 256K ROM3
RI lOOK
0
± 5
%
YaW
R2 lOOK
0
± 5
%
YaW
Cl
0.1
µ
C2
0.1
µ
R3
10KO± 5
%
'!.W
1
VGG
2
W'lf
i--
3
RAM3
,__
4
A 8
/
~
A
CJ
/
1--
6
lHA90
-.
7
A 11
:=J
8
A13A
9
RD
RAM2
1,0
Alt)
RAM1
1 1
Al)
NC
VCC
f--
-
NC
vce
1-
-
12
D7
"\
A12
WR
t---
A12
WR
I--
/
13
06
"\
A7
eS2
I---
A7
CS2
~
14
D5
'\.
AG
A8
AG
A8
v
15
D4
V
A9
LHA9
~
A5
A9
"\
AS
V
16
D3
'.
V
A4
A 11
-,
A4
A 11
,v
1 7
INH
f--
f--
V
OE'
A3
OE
A3
v
1---
____c~
18
VCC
C1T
T
C2
A2
A10
,
A2
A10
AB
v
1 9
GND
A1 eSl
A1
es;
k-·
.-
V
20
eS001
AO
07
f-
A~
07
f-.....
21
i
0 2
V
D0
D6h
1/-
-"
_,r-
00
06
~
22
D 1
D1
DSh
~
D1
D5
h
23
D.0
D4
02
D4
h
V--
./
v-
D2
~
~
A,0
....-
GNO
03
h
,..--
GNO
03
h
25
Al
26
A 2
IC
1
IC2
1-'----
27
A 3
28
A4
29 AS
3~f
A6
"\.
/.
31
A7
32
A 12
"\.
33
c;m
34
A14
35
AlS
36
B"24
-55-
-_-_.,---_._
..
__ ._

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