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S
P3TDLR User's
UPER
2-10 Floppy/Hard Disk and SCSI Connections
Be aware of the following when connecting the floppy and hard disk drive
cables:
• A red mark on a wire typically designates the location of pin 1.
• A single floppy disk drive ribbon cable has 34 wires and two connectors
to provide for two floppy disk drives.
wires always connects to drive A, and the connector that does not have
twisted wires always connects to drive B.
Floppy Connector
The floppy connector is located
on J26 and requires a 34-pin rib-
bon cable for operation.
Table 2-28 for pin definitions.
ID E C o n n e c to r P in D e fin itio n s
Pin N umber
F unction
1
R eset ID E
3
H ost D ata 7
5
H ost D ata 6
7
H ost D ata 5
9
H ost D ata 4
11
H ost D ata 3
13
H ost D ata 2
15
H ost D ata 1
17
H ost D ata 0
19
G N D
21
D R Q 3
23
I/O W rite-
25
I/O R ead-
27
IO C H R D Y
29
D A C K 3-
31
IR Q 14
33
A ddr 1
35
A ddr 0
37
C hip S elect 0
39
A ctivity
Manual
See
T a b le 2 -2 9
(J 2 3 , J 2 4 )
Pin N umber
F unction
2
G N D
4
H ost D ata 8
6
H ost D ata 9
8
H ost D ata 10
10
H ost D ata 11
12
H ost D ata 12
14
H ost D ata 13
16
H ost D ata 14
18
H ost D ata 15
20
22
G N D
24
G N D
26
G N D
28
BA LE
30
G N D
32
IO C S 16-
34
G N D
36
Addr 2
38
C hip Select 1-
40
G N D
2-18
The connector with the twisted
T a b le 2 -2 8
F lo p p y C o n n e c to r P in D e finitio n s (J 2 6 )
Pin N umber
F unction
1
G N D
3
G N D
5
Key
7
G N D
9
G N D
11
G N D
13
G N D
15
G N D
17
G N D
19
G N D
21
G N D
23
G N D
25
G N D
27
G N D
29
G N D
31
G N D
33
G N D
IDE Connectors
There are no jumpers to config-
ure the onboard IDE connectors
J23 and J24. Refer to Table 2-
29 for pin definitions.
K ey
Pin N umber
F unction
2
F D H D IN
4
R eserved
6
F D ED IN
8
Index-
10
M otor Enable
12
D rive Select B-
14
D rive Select A-
16
M otor Enable
18
D IR -
20
S T E P-
22
W rite D ata-
24
W rite G ate-
26
T rack 00-
28
W rite Protect-
30
R ead D ata-
32
Side 1 Select-
34
D iskette
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