2–36

Enabling the Drive

The Compact Flash interface emulates an IDE drive to the operating system. Note that the
Compact Flash interface takes up one of the positions of the primary IDE drive controller. If you
use the Compact Flash interface, you can only add one additional hard drive to the primary IDE
controller.

Master/Slave Setting

The Compact Flash interface can be configured to emulate a master or slave IDE device in the
system.
! To configure the drive as master, install a jumper on W12.
! To configure the drive as slave, remove the jumper on W12.
Note that an IDE drive attached to the primary IDE controller must hav e the oppo site se tting.

Solid-State Disk Preparation

To prepare Compact Flash device for use in the system, insert the device in co nnecto r J23. Boot the
system and prepare the drive just as you would a new IDE drive. That is, use the DOS FDISK
utility to set up one or more partitions, and then use the DOS FORMAT utility to fo rmat the d rive.
A Compact Flash device, properly formatted and programmed, can be used as a boot drive. To do so,
you must configure the drive to be master by installing a jumper on W12. First FD ISK the device as
a primary DOS partition, then format the drive using the /S option to include the DOS operating
system.
UltraSCSI INTERFACE
The Little Board/P5x features an optional PCI Small Computer System Interface (UltraSCSI)
controller. This subsystem is available by special order. It is not assembled on the standard
versions of the Little Board P5x. The SCSI port uses a 50-pin male header connector (J9) to
interface with peripherals. This connector provides an 8-bit path to the peripheral device, standard
for most peripherals. The controller subsystem is internally connected to the PCI expansion bus.
Table 2– 31 shows the pinout and signal definitions of the SCSI interface. Refer to you r SCSI dev ice
documentation or the ANSI X3.131 SCSI specification for detailed information on the SCSI sig nal
functions.
Note
For maximum reliability, keep the SCSI cable as short as possible for
data transfer rates above 10 MB/s.

UltraSCSI Connector

Table 2– 31 shows the pinout of the SCSI interface connector, J9. Table 2– 328 shows
manufacturer’s part numbers for mating connectors.