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7
Data Bit 5
8
Data Bit 6
9
Data Bit 7
10
Acknowledge
11
Busy
12
Paper Empty
13
Select
Mouse Port Signals
Pin Signal Name
1
Mouse Data
2
No Connection
3
Ground
Keyboard Port Signals
Pin Signal Name
1
Keyboard Data
2
Mouse Data
3
Ground
I/O
20
I/O
21
I/O
22
I
23
I
24
I
25
O
I/O
Pin
I/O
4
N/A
5
Power 6
I/O
Pin Signal Name
I/O
4
N/A
5
Power
6
Ground
Ground
Ground
Ground
Ground
Ground
Signal Name
+5 V dc
Mouse Clock
No Connection
+5 V dc
Keyboard Clock
Mouse Clock
Power
Power
Power
Power
Power
Power
I/O
Power
I/O
N/A
I/O
Power
I/O
N/A
137
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