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I
2
3
4
A
INT(CPU)
CLK(CPUl
R::J!CPUl
IORQ(CPUl
Ml(CPUl
RES( CPU)
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042: 27
042: 26
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APPENDIX 6
4431 I/O CIRCUIT DIAGRAM 5(5)
35
l
Jf.14
+12V(xJ
1.IM
(SJ
Jf.1s
12V(xJ
1.IM
(SJ
061
.047
048
050
01.2.43
033.45.62,65
IC
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TXD
R-:'"S
READY
RXD
CTS
DSR
ov
2
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DTR
PR TXD
PR RXD
READY
KBD TXD
KBD RXD
ov
5
+17V
KBD TXD
KBD RXD
ov
Circuit Board: 114 I 93 30-00
7
14
I
3
2
9
31
24
5
16
8
14
7
+5V
0
v
-12V
-12V(xJ +12V(xJ
Pin Number/ DC-Supply Voit age
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