AXIOMTEK sbc84500, User Manual

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SBC84500 User’s 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 Pin Description
1 GND 2 Reduce write current
3 GND 4
No connector
5
GND
6 Density select
7
GND
8
Index #
9
GND
10
Motor enable A #
11
GND
12
Drive select B #
13
GND
14
Drive select A #
15
GND
16
Motor enable B #
17 GND 18 Direction #
19 GND 20 STEP #
21 GND 22 Write data #
23
GND
24
Write gate #
25
GND
26
Track 0 #
27
GND
28
Write protect #
29
NC
30
Read data #
31
GND
32
Head select #
33 NC 34 Disk change #
Hardware Description
19