Floppy Disk Controller - AXIOMTEK sbc84500 User Manual

3.11 Floppy Disk Controller

The SBC84500VEA provides a 34-pin header type connector, FDD1 for
supporting up to two floppy drives. The floppy drives could be any one of the
following types: 3.5" /1.44MB/2.88MB.
FDD1: Floppy Disk Connector Pin Assignment
Pin Description
1
GND
3
GND
5
GND
7
GND
9
GND
11
GND
13
GND
15
GND
17
GND
19
GND
21
GND
23 GND
25
GND
27
GND
29
NC
31
GND
33
NC
Hardware Description
SBC84500 User's Manual
Pin Description
2
Reduce write current
No connector
4
Density select
6
8
Index #
10
Motor enable A #
12
Drive select B #
14
Drive select A #
16
Motor enable B #
18
Direction #
20
STEP #
22
Write data #
24 Write gate #
26
Track 0 #
28
Write protect #
30
Read data #
32
Head select #
34
Disk change #
19