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184 Appendix C: Technical reference
Floppy disk interface
Pin
20
21
22
23
24
25
26
For details on connecting your floppy disk drive to the internal connector of the
parallel interface, please refer to Connecting a floppy disk drive to the parallel port
connector.
Internal auxiliary I/O connector
The internal auxiliary I/O connector is more specifically a 26-pin, IDC male
connector. Its pinout is outlined in the following table.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Floppy disk drive signal
Ground
Drive Enable 1
Ground
Write Data
Ground
Write Gate
Not connected
25
26
Front of computer
Signal
GND
GND
LVTTL I/O 0
LVTTL I/O 1
LVTTL I/O 2
LVTTL I/O 3
LVTTL I/O 4
LVTTL I/O 5
LVTTL I/O 6
LVTTL I/O 7
LVTTL I/O 8
LVTTL I/O 9
1
2
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