Xycom XVME-654 Manual page 70

The IDE controller supports enhanced PIO modes, which reduce the cycle times for
16-bit data transfers to the hard drive. Check with your drive manual to see if the
drive you are using supports these modes. The higher the PIO mode, the shorter the
cycle time. As the IDE cable length increases, this reduced cycle time can lead to
erratic operation. As a result, it is in your best interest to keep the IDE cable as short
as possible.
The PIO modes are selected in the BIOS setup (refer to Chapter 3). The
Autoconfigure will attempt to classify the drive connected if the drive supports the
auto ID command. If you experience problems, change the PIO to standard.
P5 Connector
P5 connects a single 3.5-inch floppy drive. Power for this drive is supplied by the
connector.
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Chapter 4 – 978 PCI Ethernet Controller Module
Caution
Pin Signal Pin
1 +5V 14
2 IDX* 15
3 +5V 16
4 FDS1* 17
5 +5V 18
6 DCHG* 19
7 NC 20
8 NC 21
9 NC 22
10 MO1* 23
11 NC 24
12 FDIRC* 25
13 NC 26
Signal
FSTEP*
GND
FWD*
GND
FWE*
GND
FTKO*
GND
FWP*
GND
FRDD*
GND
FHS*
5-6