(5)
PRINTER
INTERFACE(PRINTER)
directien
.
min
Qpin
_
1
direction
V
(CPU
-
out)
S3151
filo.
No.
Signal
(CPU
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out)
1
--~
STRB
1
2
D,,
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D,
3
_
4
D,
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D,
Q
5
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5
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D,
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7
Q
s
D.
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--
D,
_
9
’
10
A i ; T <
--
---
BUSY
_
11
Q
12
-
Q
Q
-
,
13
Q
L4
,
-
I
I
-
_
15
15
GND
--»
-
17
0
18
-
Q
-
19
20
1
-
-
21
22
1
-
-
23
24
-
-
25
26
-
-
27
QI
28
-
-
\29
Q)
30
-
-
31
Q
32
-
»-_-
GND
33
Q
34
_
-
-
0
as
Q
as
-
(5)
Memory
expansion
(RAM3,
RAM4
)
direction
*Z
*1
p i 1 1 Q
in
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directicn
(CPU
_
QU_tI_
RAM4
RAM3
NO_
Q
O_
_
RAM3
RA114
_(CPU wut,
----»
+12v
Q
+12v
1
2
GND
Q
GND
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+sv
Q
+sv
3
‘
4‘
-sv
Q
-sv
---
--»
D0
Q
D0
5
Q
e
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D,
DQ
Q
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---
D,
Q
D,
7
3
Q
D1
D,
Q
---
--~
D.
Q
D.
9
10
Q
D,
D,
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D.
D.
11
12
Q
D,
D,
Q
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Q
ARD
13
Q
14
Q
AR,
AR,
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AR,
Q
AR,
Q
15
16
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AR,
AR,
--
--~
-
AR.
Q
AR.
_
I7
LE
18
1
AR,
AR,
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»
--
V
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3
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19
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20
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-
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§
CAS’/52
21
22
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23
z
24
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A 8 5 - A S E I _ . _
25
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26
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SEL
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0
2 7 Q _ _
28
Q
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*l,
£143
is
for
the
address
(58000
*2.
RAM4
is
for
the
address
(SCOOO
SEFFF)
Содержание MB-6890
Страница 1: ...HITACHI PERSONAL COMPUTER MB 6890 SERVICE MANUAL I R 0 3012 98 ...
Страница 2: ...HITACHI PERSONAL COMPUTER MB 6890 SERVICE MANUAL ev O 30 1 2 1 ...
Страница 42: ... one of page 40 44 missing ...
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