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System unit
Parallel port
The parallel port uses a female 25-pin D-shell
connector.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
Keyboard/mouse
The keyboard and mouse connectors are miniature 6-pin
connectors
DIN connectors.
Pin
2/22 LS PRO HARDWARE TECHNICAL REFERENCE
I/O
Signal name
I/O
Strobe
I/O
Data bit 0
I/O
Data bit 1
I/O
Data bit 2
I/O
Data bit 3
I/O
Data bit 4
I/O
Data bit 5
I/O
Data bit 6
I/O
Data bit 7
I
Ack-
I
Busy
I
PE
I
SLCT
I/O
1
I/O
2
NA
3
NA
4
NA
5
I/O
6
NA
13
25
Pin
I/O
Signal name
14
O
Autofeed XT-
15
I
Error-
16
O
Init-
17
O
Slct In-
18
NA
Ground
19
NA
Ground
20
NA
Ground
21
NA
Ground
22
NA
Ground
23
NA
Ground
24
NA
Ground
25
NA
Ground
6
4
2
Signal name
Data
Reserved
Ground
+5Vdc
Clock
Reserved
1
14
5
3
1
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