IBM 4840-563 System Reference - Page 52
Microphone connector, Parallel Connector, External Diskette Drive Connector, Signal
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Microphone connector Pin Tip Ring Base Signal Input +5 V Ground Headphone Connector Pin Tip Ring Base Signal Left channel audio Right channel audio Ground Parallel Connector Pin Signal 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 ACK# 11 Busy 12 PE 13 SLCT I/O Pin Signal I/O I/O 14 ATUO FC XT# O I/O 15 Error# I I/O 16 INIT# O I/O 17 SLCT IN# O 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 External Diskette Drive Connector SurePOS 500 Model XX3 Technical Reference, v 1.3 81 Page 52 of
![](/manual_guide/products/ibm-4840563-reference-7fee297/52.png)
Microphone connector
Pin
Signal
Tip
Input
Ring
+5 V
Base
Ground
Headphone Connector
Pin
Signal
Tip
Left channel audio
Ring
Right channel audio
Base
Ground
Parallel Connector
Pin
Signal
I/O
Pin
Signal
I/O
1
STROBE#
I/O
14
ATUO FC XT#
O
2
Data bit 0
I/O
15
Error#
I
3
Data bit 1
I/O
16
INIT#
O
4
Data bit 2
I/O
17
SLCT IN#
O
5
Data bit 3
I/O
18
Ground
6
Data bit 4
I/O
19
Ground
7
Data bit 5
I/O
20
Ground
8
Data bit 6
I/O
21
Ground
9
Data bit 7
I/O
22
Ground
10
ACK#
I
23
Ground
11
Busy
I
24
Ground
12
PE
I
25
Ground
13
SLCT
External Diskette Drive
Connector
SurePOS 500 Model XX3 Technical Reference, v 1.3
Page 52 of
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