Parallel Port Signals; Mouse Port Signals; Keyboard Port Signals - IBM Aptiva 2187 Service Manual

Parallel Port Signals

Pin Signal Name
1 Strobe
2 Data Bit 0
3 Data Bit 1
4 Data Bit 2
5 Data Bit 3
6 Data Bit 4
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 Pin Signal Name
O 14 Auto Feed
I/O 15 Error
I/O 16 Initialize
I/O 17 Select (In)
I/O 18 Ground
I/O 19 Ground
I/O 20 Ground
I/O 21 Ground
I/O 22 Ground
I 23 Ground
I 24 Ground
I 25 Ground
O
I/O Pin Signal Name
I/O 4 +5 V dc
N/A 5 Mouse Clock
Power 6 No Connection
I/O Pin Signal Name
I/O 4 +5 V dc
N/A 5 Keyboard Clock
Power 6 Mouse Clock
I/O
N/A
I
O
O
Power
Power
Power
Power
Power
Power
Power
Power
I/O
Power
I/O
N/A
I/O
Power
I/O
N/A
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