Eurotech Appliances CPU-1461 - Manual (Page 36)

36 PC/104-Plus – CPU-1461 Module
Primary and Secondary ATAPI Page
This option concerns mass storage devices using a standard EIDE interface.
The CPU board has two EIDE controllers, so the ATAPI Units can be separated in two parts: ATAPI Primary
and ATAPI Secondary. In any case the options are the same.
• Note: ATAPI (or EIDE) devices can be both hard disks and CD_ROM devices or, sometimes, storage
tape-units .
• Note: each EIDE interface supports two peripherals, called master unit and slave unit. Remember to
select as master unit a bootable disk (containing any valid O.S.).
ATAPI unit type
Option Description Note
None No unit selected
Auto Unit auto-detection
LBA LBA unit selected
CHS CHS unit selected
CD-ROM CD-ROM unit selected
Other Other unit selected
• Note: when the Auto feature is selected, the BIOS ignores any other data (like Mode, Cyls, Head, etc.).
Use this option for the most of hard disks or other ATAPI devices.
• Note: LBA and CHS are two different types of ATAPI units addressing mode. The first one is normally
used with modern hard disks, from 512 Kbytes to above 8 Gbytes in size. For both modes, the user
should know the physical hard-disk structure in terms of Cylinders, Heads and Sectors. For easy use of
any kind of disk, the Auto option is preferable.
• Note: to speed-up the bootstrap select the option None for unused ATAPI devices.