Specifications

4.2 EIDE Interfaces
The board supports two EIDE (ATA100) interfaces.
The Primary EIDE interface connects via the CompactPCI J5 connector of the PP 110/01x
board, or through the Transition Module. Up to two EIDE peripherals may be connected to this
interface. The BIOS Setup screens, for Main | Primary Master and Main | Primary
Slave allow the user to see what is connected to this interface, and to select some
characteristics of the drives manually. Normally the PC BIOS firmware will automatically
determine the drive characteristics from the drives themselves.
The Secondary EIDE interface connects only to the optional Hard Disk or CompactFlash Storage
Kits. The Hard Disk kit will appear as the Secondary Master drive, and the CompactFlash cards
on the CompactFlash kit will appear as the Secondary Master and Secondary Slave drives. The
BIOS Setup screens for Main | Secondary Master and Main | Secondary Slave
allow the user to see what is connected to this interface, and to select some characteristics of
the drives manually.
Note that when using faster EIDE drives the overall cable length from the PP 110/01x board to
the drive furthest from the board must be kept as low as possible, and in any case no more than
18 inches or 450 mm. If this is not practical, it may be necessary to reduce the interface
performance using the UltraDMA Mode and Transfer Mode fields of the BIOS Setup screens
indicated above.
To achieve the faster speeds (above ATA33) via the Primary EIDE Interface it will also be
necessary to use the correct (80-way) type of EIDE cable, and to manually select the User and
UDMA 4 or UDMA 5 speeds for the drive using the BIOS Setup screens for Main|Primary
Master and Main|Primary Slave as appropriate. Selection of the fastest speed for the
Secondary (on-board) EIDE interface is automatic.
4-2 VP 110/01x
Mass Storage Interfaces