Service and Maintain

4–6 415606-001 Service Reference Guide, dx2200 MT
Serial and Parallel ATA Drive Guidelines and Features
4.8.2 Native Mode
The native mode is used to access devices attached to additional ATA controllers and is not
supported by many legacy operating systems. Addresses are assigned by PCI Plug-n-Play BIOS
and the IRQ is shared with multiple controllers. Base Address Registers for the Command and
Control Block are found in the PCI Configuration Space.
■ Offset 10h—Primary Command base address
■ Offset 14h—Primary Control base address
■ Offset 18h—Secondary Command base address
■ Offset 1Ch—Secondary Control base address